Journal articles: 'CUO NANOSTRUCTURES'

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Supakosl, Benjara, Vatcharinkorn Mekla, and Chakkaphan Raksapha. "Effect of Temperature and Synthesis of CuO Nanostructures on Cu Plate by Thermal Method." Advanced Materials Research 634-638 (January 2013): 2160–62. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2160.

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CuO nanostructures were synthesized by thermal evaporation method using Cu metal plate in air at temperatures ranging from 400 to 600 C for 6 h. The CuO nanostructures were characterized by X-ray diffraction, XRD and field emission scanning electron microscopy, FE-SEM. X-ray diffraction, XRD pattern showed the bicrystal nanostructure of CuO and Cu2O. FE-SEM images indicated that the nanowires depended on temperatures. The diameter of Cuo nanowires varies from 10 nm to 20 nm and length of several 5 micrometers.

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Kaur, Gurjinder, Amlan Baishya, R. Manoj Kumar, Debrupa Lahiri, and Indranil Lahiri. "Distinct Levels of Adhesion Energy of In-Situ Grown CuO Nanostructures." Journal of Nanoscience and Nanotechnology 20, no. 6 (June 1, 2020): 3527–34. http://dx.doi.org/10.1166/jnn.2020.17419.

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CuO nanostructures were reported for a myriad of applications in diverse areas such as high Tc superconductors, field emitters, catalysts, gas sensors, magnetic storage, biosensors, superhydrophobic surfaces, energy materials etc. In all these applications, structural stability of the nanostructures is very important for efficient functioning of devices with a longer lifetime. Hence, it is necessary to understand the adhesion energy of these nanostructures with their substrates. In this research work, a variety of CuO nanostructures were synthesized directly on Cu foil substrate by varying only the concentration of the reagents. CuO nanostructures, thus grown, were subjected to a nano-scratch test to quantify their adhesion strength with Cu substrate. The adhesion energy was observed to be highest for nanorods and lowest for nanoribbons among all the CuO nanostructures synthesized in this work. Results of this research will be useful in predicting the service life and in improving the efficiency of CuO nanostructure-based devices.

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Candemir, Duygu, and Filiz Boran. "Size Controllable Synthesis and Characterization of CuO Nanostructure." Materials Science Forum 915 (March 2018): 98–103. http://dx.doi.org/10.4028/www.scientific.net/msf.915.98.

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In this study, copper oxide (CuO) nanostructures were successfully prepared by adding EG (ethylene glycol) and PEG (4000, 8000) (polyethylene glycol) via an in-situ chemical precipitation method. EG and PEG (4000, 8000) were effective for changing the particular size of CuO and we examined the effects of drying type such as freeze drying, muffle and horizontal furnace on the size of CuO nanostructure. The structure, morphology and elemental analysis of CuO nanostructure were analyzed by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). Also, the CuO nanostructures showed excellent electrical conductivity by the changing of PEG’s molecular weight and drying processes.

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Raksa, Phathaitep, A. Gardchareon, N. Mangkorntong, and Supab Choopun. "CuO Nanostructure by Oxidization of Copper Thin Films." Advanced Materials Research 55-57 (August 2008): 645–48. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.645.

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CuO nanostructures were synthesized by oxidizing copper thin films. The copper thin film was grown on alumina substrates by evaporation copper powder at pressure of 0.04 mtorr. The copper thin films were then oxidized 800, and 900oC for 12, 24 and 48 hr, respectively. The obtained CuO nanostructures were investigated by Energy Dispersive Spectroscopy (EDS), Field Emission Scanning Electron Microscope (FE-SEM) image, and X-Ray Diffraction (XRD). The diameter of CuO nanostructure is around 100-600 nanometers and it is depends on oxidation reaction time and temperature. These CuO nanostructures have a potential application for nanodevices such as nano gas sensor or dye-sensitized solar cells.

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Kasian, Pristanuch, and Supakorn Pukird. "Gas Sensing Properties of CuO Nanostructures Synthesized by Thermal Evaporation of Copper Metal Plate." Advanced Materials Research 93-94 (January 2010): 316–19. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.316.

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CuO nanostructures were synthesized by thermal evaporation method. Using Cu metal plate at temperature of 400oC for 24 hrs in one atmosphere of oxygen and studied structural and gas sensing properties. The CuO nanostructured were investigated by the stereo microscope (image analyzer), X-ray diffraction, scanning electron microscope. The diameter of CuO nanowires vary from 10 nm to 50 nm and length of several 10 micrometers. The sensitivity of CuO nanostructures and response were performed at room temperature for ethanol and CO2 sensor.

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Fu, Xiao Ming, and Jie Ren. "Synthesis of CuO Flower-Nanostructure via the Hydrothermal Method." Advanced Materials Research 873 (December 2013): 131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.873.131.

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CuO flower-nanostructures are successfully synthesized with CuCl2 as copper source and Na2CO3 as auxiliary salt at 180 °C for 24 h via the simple hydrothermal method. The phase and the morphologies of the samples have been characterized and analyzed by XRD (X-ray diffraction) and SEM (Scanning electron microscope), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the reaction temperature is propitious to synthesize CuO flower-nanostructures while the increase of the reaction time is not in favor of their synthesis. The influence of the increase of the auxiliary salt on the morphology of CuO flower-nanostructures is not remarkable. The mechanism of the formation of CuO flower-nanostructure is discussed.

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Zhang, W. X., Z. H. Yang, S. X. Ding, and S. H. Yang. "Synthesis and Characterization of Nanostructured CuO Array Films." Solid State Phenomena 121-123 (March 2007): 303–6. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.303.

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In this paper, we report a simple and large-scale fabrication of CuO array films with different nanostructures grown on copper foils. CuO nanotube and nanorod array films were synthesized through the dehydration of the nanostructured Cu(OH)2 arrays in flow of N2, which are prepared in an alkali solution at a low temperature without using any templates and surfactants. The obtained CuO nanotube and nanorod array films retain similar morphology to that of the Cu(OH)2 precursors. While CuO nanosheet and nanobelt array films were prepared directly in the alkali solution. The evolution of the nanostructures as a function of the reaction conditions has been revealed, from nanorods of Cu(OH)2 to nanotubes of Cu(OH)2 to nanosheets of CuO to nanobelts of CuO. Experiments show that the growth temperature plays an important role in the formation of well-aligned Cu(OH)2 nanostructured array films on copper foil. The samples are characterized by XRD, SEM and TEM.

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Tatsuoka, Hirokazu, Wen Li, Er Chao Meng, Daisuke Ishikawa, and Kaito Nakane. "Syntheses and Structural Control of Silicide, Oxide and Metallic Nano-Structured Materials." Solid State Phenomena 213 (March 2014): 35–41. http://dx.doi.org/10.4028/www.scientific.net/ssp.213.35.

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The structural control and morphological modification of a series of silicide, oxide and Ag metal nanostructures have been further discussed with reviews of nanostructure syntheses, such as CrSi2 nanowire bundles dendrites, MoSi2 nanosheets, α-Fe2O3 nanowires nanobelts, CuO/Cu2O nanowire axial heterostructures, ZrO2/SiOx and CrSi2/SiOx core/shell nanowires. In addition, the syntheses of Ag three-dimensional dendrites, two-dimensional dendrites, two-dimensional fractal structures, particles and nanowires also were discussed. Moreover, the structural and morphological properties of the nanostructures were examined. The structural control and morphological modifications of the nanostructures have been successfully demonstrated by the appropriate thermal treatments with specific starting materials. A large volume of silicide nanowire bundles, large area of oxide nanowire arrays and large area Ag nanostructure coatings were successfully fabricated.

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9

Chan, Yu Bin, Vidhya Selvanathan, Lai-Hock Tey, Md Akhtaruzzaman, Farah Hannan Anur, Sinouvassane Djearamane, Akira Watanabe, and Mohammod Aminuzzaman. "Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract." Nanomaterials 12, no. 20 (October 13, 2022): 3589. http://dx.doi.org/10.3390/nano12203589.

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Synthesis of copper oxide (CuO) nanostructures via biological approach has gained attention to reduce the harmful effects of chemical synthesis. The CuO nanostructures were synthesized through a green approach using the Garcinia mangostana L. leaf extract and copper (II) nitrate trihydrate as a precursor at varying calcination temperatures (200–600 °C). The effect of calcination temperatures on the structural, morphological and optical properties of CuO nanostructures was studied. The red shifting of the green-synthesized CuO nanoparticles’ absorption peak was observed in UV-visible spectrum, and the optical energy bandgap was found to decrease from 3.41 eV to 3.19 eV as the calcination temperatures increased. The PL analysis shown that synthesized CuO NPs calcinated at 500 °C has the maximum charge carriers separation. A peak located at 504–536 cm−1 was shown in FTIR spectrum that indicated the presence of a copper-oxygen vibration band and become sharper and more intense when increasing the calcination temperature. The XRD studies revealed that the CuO nanoparticles’ crystalline size was found to increase from 12.78 nm to 28.17 nm, and dislocation density decreased from 61.26 × 1014 cm−1 to 12.60 × 1014 cm−1, while micro strain decreased from 3.40 × 10−4 to 1.26 × 10–4. From the XPS measurement, only CuO single phase without impurities was detected for the green-mediated NPs calcinated at 500 °C. The morphologies of CuO nanostructures were examined using FESEM and became more spherical in shape at elevated calcination temperature. More or less spherical nanostructure of green-mediated CuO calcinated at 500 °C were also observed using TEM. The purity of the green-synthesized CuO nanoparticles was evaluated by EDX analysis, and results showed that increasing calcination temperature increases the purity of CuO nanoparticles.

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Tran, Thi Ha, and Viet Tuyen Nguyen. "Copper Oxide Nanomaterials Prepared by Solution Methods, Some Properties, and Potential Applications: A Brief Review." International Scholarly Research Notices 2014 (December 17, 2014): 1–14. http://dx.doi.org/10.1155/2014/856592.

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Cupric oxide (CuO), having a narrow bandgap of 1.2 eV and a variety of chemophysical properties, is recently attractive in many fields such as energy conversion, optoelectronic devices, and catalyst. Compared with bulk material, the advanced properties of CuO nanostructures have been demonstrated; however, the fact that these materials cannot yet be produced in large scale is an obstacle to realize the potential applications of this material. In this respect, chemical methods seem to be efficient synthesis processes which yield not only large quantities but also high quality and advanced material properties. In this paper, the effect of some general factors on the morphology and properties of CuO nanomaterials prepared by solution methods will be overviewed. In terms of advanced nanostructure synthesis, microwave method in which copper hydroxide nanostructures are produced in the precursor solution and sequentially transformed by microwave into CuO may be considered as a promising method to explore in the near future. This method produces not only large quantities of nanoproducts in a short reaction time of several minutes, but also high quality materials with advanced properties. A brief review on some unique properties and applications of CuO nanostructures will be also presented.

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11

Hwa, Kuo Yuan, and Palpandi Karuppaiah. "Comparative Studies on the Synthesis of Copper Oxide Nano-Structures." Materials Science Forum 962 (July 2019): 51–56. http://dx.doi.org/10.4028/www.scientific.net/msf.962.51.

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Synthesis of nanostructures for industrial usage is a challenge issue since most of the scale up production is not economically suitable. Here we have described two efficient synthesis approaches for copper (II) oxide nanostructures. And, we have compared the methods with current published procedures in terms of time and its impact to the environments. Our simple and environmentally friendly synthesis procedures can produce various Cu (II) oxide nanostructures. We have successfully synthesis Cu (OH)2, CuO nanowire and CuO nanoparticles. And, they were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction spectroscopy (XRD), Field emission scanning electron microscopy (FESEM), We have also explored the potential of these nanostructure for future development on biomedical applications.

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12

Schlur, Laurent, Pierre Agostini, Guillaume Thomas, Geoffrey Gerer, Jacques Grau, and Denis Spitzer. "Detection of Organophosphorous Chemical Agents with CuO-Nanorod-Modified Microcantilevers." Sensors 20, no. 4 (February 15, 2020): 1061. http://dx.doi.org/10.3390/s20041061.

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Microcantilevers are really promising sensitive sensors despite their small surface. In order to increase this surface and consequently their sensitivity, we nanostructured them with copper oxide (CuO) nanorods. The synthesis of the nanostructure consists of the oxidation of a copper layer deposited beforehand on the surface of the sample. The oxidation is performed in an alkaline solution containing a mixture of Na(OH) and (NH4)2S2O8. The synthesis procedure was first optimized on a silicon wafer, then transferred to optical cantilever-based sensors. This transfer requires specific synthesis modifications in order to cover all the cantilever with nanorods. A masking procedure was specially developed and the copper layer deposition was also optimized. These nanostructured cantilevers were engineered in order to detect vapors of organophosphorous chemical warfare agents (CWA). The nanostructured microcantilevers were exposed to various concentration of dimethyl methylphosphonate (DMMP) which is a well-known simulant of sarin (GB). The detection measurements showed that copper oxide is able to detect DMMP via hydrogen interactions. The results showed also that the increase of the microcantilever surface with the nanostructures improves the sensors efficiency. The evolution of the detection performances of the CuO nanostructured cantilevers with the DMMP concentration was also evaluated.

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Sabry, Raad S., and Roonak Abdul Salam A. Alkareem. "Synthesis of ZnO-CuO flower-like hetero-nanostructures as volatile organic compounds (VOCs) sensor at room temperature." Materials Science-Poland 36, no. 3 (September 1, 2018): 452–59. http://dx.doi.org/10.2478/msp-2018-0055.

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AbstractZnO-CuO flower-like hetero-nanostructures were successfully prepared by combining hydrothermal and dip coating methods. Flower-like hetero-nanostructures of ZnO-CuO were examined by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and UV-Vis. The sensing properties of ZnO-CuO flower-like hetero-nanostructures to volatile organic compounds (VOCs) were evaluated in a chamber containing acetone or isopropanol gas at room temperature. The sensitivity of ZnO-CuO flower-like hetero-nanostructures to VOCs was enhanced compared to that of pure leafage-like ZnO nanostructures. Response and recovery times were about 5 s and 6 s to 50 ppm acetone, and 10 s and 8 s to 50 ppm isopropanol, respectively. The sensing performance of ZnO-CuO flower-like hetero-nanostructures was attributed to the addition of CuO that led to formation of p-n junctions at the interface between the CuO and ZnO. In addition, the sensing mechanism was briefly discussed.

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14

Ibupoto, Zafar, Aneela Tahira, Hamid Raza, Gulzar Ali, Aftab Khand, Nabila Jilani, Arfana Mallah, Cong Yu, and Magnus Willander. "Synthesis of Heart/Dumbbell-Like CuO Functional Nanostructures for the Development of Uric Acid Biosensor." Materials 11, no. 8 (August 8, 2018): 1378. http://dx.doi.org/10.3390/ma11081378.

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It is always demanded to prepare a nanostructured material with prominent functional properties for the development of a new generation of devices. This study is focused on the synthesis of heart/dumbbell-like CuO nanostructures using a low-temperature aqueous chemical growth method with vitamin B12 as a soft template and growth directing agent. CuO nanostructures are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques. CuO nanostructures are heart/dumbbell like in shape, exhibit high crystalline quality as demonstrated by XRD, and have no impurity as confirmed by XPS. Apparently, CuO material seems to be porous in structure, which can easily carry large amount of enzyme molecules, thus enhanced performance is shown for the determination of uric acid. The working linear range of the biosensor is 0.001 mM to 10 mM with a detection limit of 0.0005 mM and a sensitivity of 61.88 mV/decade. The presented uric acid biosensor is highly stable, repeatable, and reproducible. The analytical practicality of the proposed uric acid biosensor is also monitored. The fabrication methodology is inexpensive, simple, and scalable, which ensures the capitalization of the developed uric acid biosensor for commercialization. Also, CuO material can be used for various applications such as solar cells, lithium ion batteries, and supercapacitors.

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Noontasa, Sopa, Vatcharinkorn Mekla, and Sert Kiennork. "Structural and Photocatalytic Properties of CuO Nanorods Using the Hydrothermal Treatment Method." Advanced Materials Research 634-638 (January 2013): 2258–60. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2258.

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In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

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Supunnee, Khun Ngern, Vatcharinkorn Mekla, and Eakkarach Raksasri. "Structural and Photocatalytic Properties of Fe-Dope TiO₂ Nanostructure Using the Hydrothermal Treatment Method." Advanced Materials Research 634-638 (January 2013): 2261–63. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2261.

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In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

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Margaret, S. Mary, Albin John P. Paul Winston, S. Muthupandi, P. Shobha, and P. Sagayaraj. "A Comparative Study of Nanostructures of CuO/Cu2O Fabricated via Potentiostatic and Galvanostatic Anodization." Journal of Nanomaterials 2021 (August 14, 2021): 1–8. http://dx.doi.org/10.1155/2021/5533845.

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A detailed comparative study on the synthesis process of coral-like CuO/Cu2O nanorods (NRs) and nanopolycrystals (NPCs) fabricated on Cu foil employing aqueous electrolyte via potentiostatic (POT) and galvanostatic (GAL) modes is discussed. The structural, morphological, thermal, compositional, and molecular vibration of the prepared CuO/Cu2O nanostructures was characterized by XRD, HRSEM, TG/DTA, FTIR, and EDX techniques. XRD analysis confirmed the crystalline phase of the formation of monoclinic CuO and cubic Cu2O nanostructures with well-defined morphology. The average particle size was found to be 21.52 nm and 26.59 nm for NRs (POT) and NPCs (GAL), respectively, and this result is corroborated from the HRSEM analysis. POT synthesized nanoparticle depicted a higher thermal stability up to 600°C implying that the potentiostatically grown coral-like NRs exhibit a good crystallinity and well-ordered morphology.

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Sobahi, Nebras, Mohd Imran, Mohammad Ehtisham Khan, Akbar Mohammad, Md Mottahir Alam, Taeho Yoon, Ibrahim M. Mehedi, Mohammad A. Hussain, Mohammed J. Abdulaal, and Ahmad A. Jiman. "Facile Fabrication of CuO Nanoparticles Embedded in N-Doped Carbon Nanostructure for Electrochemical Sensing of Dopamine." Bioinorganic Chemistry and Applications 2022 (October 14, 2022): 1–9. http://dx.doi.org/10.1155/2022/6482133.

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In the present study, a highly selective and sensitive electrochemical sensing platform for the detection of dopamine was developed with CuO nanoparticles embedded in N-doped carbon nanostructure (CuO@NDC). The successfully fabricated nanostructures were characterized by standard instrumentation techniques. The fabricated CuO@NDC nanostructures were used for the development of dopamine electrochemical sensor. The reaction mechanism of a dopamine on the electrode surface is a three-electron three-proton process. The proposed sensor’s performance was shown to be superior to several recently reported investigations. Under optimized conditions, the linear equation for detecting dopamine by differential pulse voltammetry is Ipa (μA) = 0.07701 c (μM) − 0.1232 (R2 = 0.996), and the linear range is 5-75 μM. The limit of detection (LOD) and sensitivity were calculated as 0.868 μM and 421.1 μA/μM, respectively. The sensor has simple preparation, low cost, high sensitivity, good stability, and good reproducibility.

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Zou, Yun Ling, Yan Li, Nan Zhang, and Jian Gang Li. "Prepared of Flower-Like CuO via CTAB-Assisted Hydrothermal Method." Advanced Materials Research 152-153 (October 2010): 909–14. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.909.

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Flower-like CuO nanostructures have been prepared via cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. Here, CuCl2•2H2O was used as copper raw material, and sodium hydroxide was used as precipitate. The resulting CuO powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) pattern exhibited the nanocrystalline nature with monoclinic structure for the as-synthesized nanostructures. FESEM images indicated that the flower-like CuO nanostructures are composed of many interconnected nanosheets in size of several micrometers in length and width and 60-80 nm in thickness. The possible formation mechanism of flower-like CuO nanostructures was discussed.

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Khan, M. A., Hasan Mahmood, Raja Naveed Ahmed, Ayaz Arif Khan, Mahboobullah, Tariq Iqbal, Asma Ishaque, and Rizwana Mofeed. "Influence of Temperature on the Morphology and Grain Size of Cupric Oxide (CuO) Nanostructures via Solvothermal Method." Journal of Nano Research 40 (March 2016): 1–7. http://dx.doi.org/10.4028/www.scientific.net/jnanor.40.1.

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Cupric oxide (CuO) nanostructures have been synthesized successfully through solvothermal chemical route. The influence of temperature on the morphology and the grain size of CuO have been investigated. Phase analysis of synthesized CuO has also been carried out using X-ray diffraction (XRD). XRD peaks showed the monoclinic crystalline phase of CuO nanostructures. The morphology of CuO has been studied by using Scanning Electron Microscope (SEM). SEM images showed the rod-like and sheet-like morphology of CuO. Fourier Transform Infrared (FTIR) spectroscopy has been employed to study the vibrational modes. The FTIR spectra confirmed the stretching vibrations of Cu-O bond. In addition, UV-visible absorption spectra have been implemented to estimate the energy bandgap of the synthesized CuO nanostructures. The energy bandgap of as prepared CuO nanostructures was estimated between 2.0 eV to 2.52 eV. The grain size was found to be increasing with the rise in temperature. The increase in grain size with increasing temperatures causes the reduction in the bandgap, which is attributed to the quantum confinement effect at smaller particle size.

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Chamninok, Pattanasuk, Dheerachai Polsongkram, Ki Seok An, Jaruwan Pongsuwan, and Supakorn Pukird. "The Effect of Temperature on Preparing CuO Nanostructures for Changing of Electrical Resistance." Applied Mechanics and Materials 620 (August 2014): 409–12. http://dx.doi.org/10.4028/www.scientific.net/amm.620.409.

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CuO nanostructures materials were prepared by thermal process using carbon charcoal assisted. The copper powder and copper sheet were mixed and covered with carbon charcoal. The starting materials and Si substrates were put in the furnace and heated at various temperatures under atmosphere of nitrogen gas. The prepared products were characterized by scanning electron microscope and X-ray diffraction technique and then studying for changing of the electrical resistance with temperature. The results revealed that the nanostructures of material consisting of CuO and Cu2O phase and the electrical resistance was changed with temperature.

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Díaz-Solís, M., A. Báez-Rodríguez, J. Hernández-Torres, L. García-González, and L. Zamora-Peredo. "Raman spectroscopy of nanograins, nanosheets and nanorods of copper oxides obtained by anodization technique." MRS Advances 4, no. 53 (2019): 2913–19. http://dx.doi.org/10.1557/adv.2019.413.

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AbstractDifferent nanostructures such as: CuOH nanorods, CuO nanosheets and Cu2O nanograins were obtained by anodization approach at room temperature during times from 10 to 40 minutes. By scanning electron microscopy technique, it was found that Cu2O nanograins were formed at 10 minutes, CuO nanosheets vertically oriented on nanograins were observed at 20 and 30 minutes, and from 20 minutes CuOH nanorods with low vertical orientation on nanosheets were formed, coexisting the three types of nanostructures at the same system. In samples without thermal treatment were observed that Raman spectra of nanograins have a typical signal at 218 cm-1 associated to Cu2O, Raman spectra of nanosheets have signals at 287 and 630 cm-1 associated to CuO and Raman spectra of nanorods, it was observed that Raman spectrum is dominated by an intense signal associated to CuOH located around 488cm-1. In addition, after 3 hours of thermal treatment at 300 °C, the morphology was conserved, and the hydrogen-related compound decreased. Raman spectra of nanorods only presented a signal at 287 cm-1 associated to CuO whereas in nanosheets three peaks at 150, 218, 304 cm-1 associated to the Cu2O were observed.

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Rao, Martha Purnachander, Jerry J. Wu, Abdullah M. Asiri, and Sambandam Anandan. "Photocatalytic degradation of tartrazine dye using CuO straw-sheaf-like nanostructures." Water Science and Technology 75, no. 6 (January 2, 2017): 1421–30. http://dx.doi.org/10.2166/wst.2017.008.

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Straw-sheaf-like CuO nanostructures were fruitfully synthesized using a chemical precipitation approach for the photocatalytic degradation assessment of tartrazine. Phase identification, composition, and morphological outlook of prepared CuO nanostructures were established by X-ray diffraction and scanning electron microscopy analysis. The photocatalytic performance of the synthesized CuO nanostructures was appraised in the presence of visible light and the possible intermediates formed during the photocatalytic degradation were analyzed by gas chromatography–mass spectrometry. A suitable degradation pathway has also been proposed.

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Feng, Qi, Shao Yuan Li, Wen Hui Ma, Xiao He, and Yu Xin Zou. "Hydrothermal Synthesis of Flower-Like CuO/ZnO/SiNWs Photocatalyst for Degradation of R6G under Visible Light Irradiation." Key Engineering Materials 727 (January 2017): 847–52. http://dx.doi.org/10.4028/www.scientific.net/kem.727.847.

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Flower-like CuO/ZnO/SiNWs nanostructures were successfully synthesized on SiNWs substrates using a simple hydrothermal method. The characteristics of the CuO/ZnO/SiNWs nanostructures were investigated through scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV–vis spectrophotometer. SEM images revealed shape transitions when the precursor mass ratic increased from 50:50 to 5:95. The strong intensity and narrow width of XRD peaks indicate that CuO/ZnO nanostructures with high molarities have good crystallinity. The UV–vis spectro-photometer indicate that ultraviolet emissions shift slightly toward lower wavelengths with incr-easing precursor solution molarity and that the intensity increases with improvement in CuO/ZnO/SiNWs crystallization.The mechanism of CuO/ZnO/SiNWs for improvement in photocatalytic activity was also discussed.

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Zhou, Ning, Meng Yuan, Dongsheng Li, and Deren Yang. "One-Pot Fast Synthesis of Leaf-Like CuO Nanostructures and CuO/Ag Microspheres with Photocatalytic Application." Nano 12, no. 03 (March 2017): 1750035. http://dx.doi.org/10.1142/s1793292017500357.

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A time- and energy- saving solution-based chemical precipitation method was developed to synthesize leaf-like CuO nanostructures. The morphology and size of the leaf-like CuO nanostructures could be simply manipulated by controlling the type and concentration of precursors, and the oriented attachment mechanism is responsible for the formation of leaf-like shape. With the concurrent reduction reaction and at appropriate concentration, CuO/Ag microspheres could be prepared and the growth mechanism is proposed. These two structures could serve as effective photocatalyst for the degradation of rhodamine B under visible light irradiation in the presence of hydrogen peroxide. Moreover, compared to pure CuO nanostructures, the photodecomposition activity of CuO/Ag microspheres increases by 42.9% due to plasmon-enhanced light absorption.

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Wang, Li Min, Hong Ming Sun, Zhong Chao Ma, and Ao Xuan Wang. "Preparation of Hierarchical CuO Nanoparticles and their Photocatalytic Activity." Advanced Materials Research 785-786 (September 2013): 378–81. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.378.

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The uniform hierarchical and microspheric copper oxide (CuO) nanostructures, which have been successfully prepared via a simple one-pot method. The detailed morphology and structure of the synthesized hierarchical and microspheric nanostructures were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and UVvisible spectroscopy. The morphology of CuO particles depends on the ammonium dihydrogen phosphate (ADP) used in the synthesis, the formation mechanisms were proposed based on the experimental results. The catalytic activity of as-synthesized CuO was demonstrated by catalytic oxidation of methylene blue in the presence of hydrogen peroxide (H2O2) and CuO with hierarchical nanostructures was found to be the best catalyst.

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Jabbar, Saja Mohsen. "Synthesis of CuO Nano structure via Sol-Gel and Precipitation Chemical Methods." Al-Khwarizmi Engineering Journal 12, no. 4 (December 18, 2017): 126–31. http://dx.doi.org/10.22153/kej.2016.07.001.

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CuO nanoparticles were synthesized in two different ways, firstly by precipitation method using copper acetate monohydrate Cu(CO2CH13)2·H2O, glacial acetic acid (CH3COOH) and sodium hydroxide(NaOH), and secondly by sol-gel method using copper chloride(CuCl2), sodium hydroxide (NaOH) and ethanol (C2H6O). Results of scanning electron microscopy (SEM) showed that different CuO nanostructures (spherical and Reef) can be formed using precipitation and sol- gel process, respectively, at which the particle size was found to be less than 2 µm. X-ray diffraction (XRD)manifested that the pure synthesized powder has no inclusions that may exist during preparations. XRD results showed the particles size of highest peak at 38.9°, was equal to (15.93nm). In addition, Fourier transform infrared spectroscopy (FT-IR) were used to describe the prepared CuO nanostructures absorption peak at 610 cm-1 which conﬁrms that the synthesized product is a pure CuO and may be attributed to Cu2O infrared active mode.

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Zheng, Ju Gong, and Ting Yang. "Microwave Assisted Synthesis of CuO Nanostructures in Lonic Liquids." Advanced Materials Research 281 (July 2011): 127–31. http://dx.doi.org/10.4028/www.scientific.net/amr.281.127.

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The dry chemical method is developed to fabricate CuO nanostructures via microwave assisted irradiation in ionic liquid 1-butyl-3-ethyl imidazolium tetrafluoroborate ([BMIM][BF4]). Both nanoparticles (20 nm in size) and nanorods (10-20 nm in diameter and 100-200 nm in length) of monoclinic CuO were obtained. The as samples were characterized by FTIR, XRD, TEM, SADE. The morphologies of the nanostructures can be controlled by the amount-tuning of NaOH and ionic liquids. The growth mechanism of CuO nanostructures is investigated.

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Khalid, Awais, Pervaiz Ahmad, Abdulrahman I. Alharthi, Saleh Muhammad, Mayeen Uddin Khandaker, Mubasher Rehman, Mohammad Rashed Iqbal Faruque, et al. "Structural, Optical, and Antibacterial Efficacy of Pure and Zinc-Doped Copper Oxide Against Pathogenic Bacteria." Nanomaterials 11, no. 2 (February 10, 2021): 451. http://dx.doi.org/10.3390/nano11020451.

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Copper oxide and Zinc (Zn)-doped Copper oxide nanostructures (CuO-NSs) are successfully synthesized by using a hydrothermal technique. The as-obtained pure and Zn-doped CuO-NSs were tested to study the effect of doping in CuO on structural, optical, and antibacterial properties. The band gap of the nanostructures is calculated by using the Tauc plot. Our results have shown that the band gap of CuO reduces with the addition of Zinc. Optimization of processing conditions and concentration of precursors leads to the formation of pine needles and sea urchin-like nanostructures. The antibacterial properties of obtained Zn-doped CuO-NSs are observed against Gram-negative (Pseudomonas aeruginosa, Klebsiella pneumonia, Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria via the agar well diffusion method. Zn doped s are found to have more effective bacterial resistance than pure CuO. The improved antibacterial activity is attributed to the reactive oxygen species (ROS) generation.

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Chen, Hao Long, Zin Ching Liou, and Shian Jang Lin. "Oxygen Plasma Induced ZnO-CuO Nanostructure Growth on a Brass Substrate by Atmospheric-Pressure Plasma Jet." Materials Science Forum 688 (June 2011): 186–90. http://dx.doi.org/10.4028/www.scientific.net/msf.688.186.

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A convenient method for direct and large-area growth of one-dimensional (1-D) CuO and ZnO nanostructures on a conductive brass substrate has been developed. The ZnO and CuO nanostructures have been simultaneously induced and growth on a brass (70Cu-30Zn alloy) substrate by using an atmospheric-pressure plasma jet (APPJ) with pure oxygen as the reaction gas in an ambient environment. Various one-dimensional (1-D) nanostructures such as nano-particles, nanowires, nanobelts, nanocombs, and nanosheets have been in situ grown on the brass substrates under different plasma treatment times. The plasma power of 150W and scanning speed of sample stage 1 mm/sec with different treating times were used in plasma surface treatment processing. The nano-scaled ZnO and CuO formation and its structure were characterized by means of grazing-incidence X-ray diffraction, Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The results showed that the nano-scaled CuO and ZnO growth process was as follows: nano-particles, nano-crystal clusters then nano-crystal columns with increasing plasma treatment times. The growth of nano-scaled oxide formed in sequence that CuO was first grew on the brass substrate then ZnO. The morphologies of nano-scaled ZnO resembled bulbs and long-legged tetrapods. However, the morphologies of nano-scaled CuO were likely bulbs and flake nanostructures. This approach could prepare CuO and ZnO nanostructures on a brass substrate without size limitations. The possible growth mechanisms and structure of nano-scaled CuO and ZnO are discussed in this paper. The simplicity of the preparation procedure and the potential technological of the product were be interested in this study.

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Jung, Kichang, Taehoon Lim, Yaqiong Li, and Alfredo A. Martinez-Morales. "ZnO-CuO core-shell heterostructure for improving the efficiency of ZnO-based dye-sensitized solar cells." MRS Advances 2, no. 15 (2017): 857–62. http://dx.doi.org/10.1557/adv.2017.247.

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ABSTRACTIn this work, the integration of ZnO-CuO core-shell nanostructures shows improvement in the conversion efficiency of ZnO-based dye-sensitized solar cells (DSSCs). This is due to CuO acting as a secondary absorption layer that allows the absorption of near-infrared (NIR) light increasing the generated photocurrent in the device, and as a blocking layer that reduces electron-hole recombination. The ZnO core and encapsulating CuO shell are synthesized through chemical vapor deposition (CVD), and thermal oxidation of a Cu seed layer, respectively. The crystallinity of the synthesized ZnO and CuO is analyzed by X-ray diffraction (XRD). Scanning electron microscope (SEM) images show the change in morphology through the steps of Cu seed layer deposition and thermal oxidation of this layer. To determine optical properties of CuO on ZnO nanorods, UV-Vis-NIR photospectrocopy is used. The comparison of conversion efficiency of DSSCs using two different photoelectrodes (i.e. ZnO nanorods versus ZnO-CuO core-shell nanostructure) is performed by I-V measurements.

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Zeng, Chunyan, Chen Gao, Li Yuan, Tao Liang, Ruisong Yang, Wei Zhang, and Song Nie. "Water Evaporation-Induced Self-Assembly of Hierarchical CuO/MnO2 Composite Nanospheres and their Applications in Lithium-Ion Batteries." Nano 12, no. 02 (February 2017): 1750022. http://dx.doi.org/10.1142/s1793292017500229.

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In this paper, hierarchical CuO/MnO2 composite hollow nanospheres have been successfully fabricated by water evaporation-induced self-assembly through a redox transformation reaction between Cu2O nanospheres and KMnO4 solution at 120[Formula: see text]C for 6[Formula: see text]h, followed by removing the residual Cu2O cores with ammonia hydroxide solution. The outstanding feature of this method is that the reaction system is in a dynamic environment due to the evaporation of the solvent water, which benefits the self-assembly of nanostructures to form hierarchical structures. Both Kirkendall effect and Ostwald ripening mechanism are suggested to be responsible for the formation of the hierarchical CuO/MnO2 nanocomposites according to the characterization results. The electrochemical properties of the products were studied, and the results show that the hierarchical CuO/MnO2 hollow nanospheres exhibit high capacity and good rate performance (a stable capacity of about 480[Formula: see text]mAh[Formula: see text]g[Formula: see text] after 80 cycles of variable charging rate), which is probably attributed to the hierarchical hollow nanostructures.

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Hsieh, Chien-Te, Jin-Ming Chen, Hung-Hsiao Lin, and Han-Chang Shih. "Field emission from various CuO nanostructures." Applied Physics Letters 83, no. 16 (October 20, 2003): 3383–85. http://dx.doi.org/10.1063/1.1619229.

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Giziński, Damian, Anna Brudzisz, Janaina S. Santos, Francisco Trivinho-Strixino, Wojciech J. Stępniowski, and Tomasz Czujko. "Nanostructured Anodic Copper Oxides as Catalysts in Electrochemical and Photoelectrochemical Reactions." Catalysts 10, no. 11 (November 17, 2020): 1338. http://dx.doi.org/10.3390/catal10111338.

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Recently, nanostructured copper oxides formed via anodizing have been intensively researched due to their potential catalytic applications in emerging issues. The anodic Cu2O and CuO nanowires or nanoneedles are attractive photo- and electrocatalysts since they show wide array of desired electronic and morphological features, such as highly-developed surface area. In CO2 electrochemical reduction reaction (CO2RR) copper and copper-based nanostructures indicate unique adsorption properties to crucial reaction intermediates. Furthermore, anodized copper-based materials enable formation of C2+ hydrocarbons and alcohols with enhanced selectivity. Moreover, anodic copper oxides provide outstanding turnover frequencies in electrochemical methanol oxidation at lowered overpotentials. Therefore, they can be considered as precious metals electrodes substituents in direct methanol fuel cells. Additionally, due to the presence of Cu(III)/Cu(II) redox couple, these materials find application as electrodes for non-enzymatic glucose sensors. In photoelectrochemistry, Cu2O-CuO heterostructures of anodic copper oxides with highly-developed surface area are attractive for water splitting. All the above-mentioned aspects of anodic copper oxides derived catalysts with state-of-the-art background have been reviewed within this paper.

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Leitner, Jindřich, David Sedmidubský, and Ondřej Jankovský. "Size and Shape-Dependent Solubility of CuO Nanostructures." Materials 12, no. 20 (October 15, 2019): 3355. http://dx.doi.org/10.3390/ma12203355.

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In our theoretical study, the enhanced solubility of CuO nanoparticles in water saturated by air is predicted based on a simple thermodynamic model. CuO is considered in the form of nanoparticles with various shapes. The interfacial energy of a solid CuO/dilute aqueous solution interface was assessed by applying the average CuO surface energy and contact angle of a sessile drop of water. The equilibrium CuO solubility was calculated using Gibbs energy minimization technique. For the smallest spherical nanoparticles considered in this work (r = 2 nm), the solubility is significantly higher than the solubility of bulk material. In the case of cylindrical nanoparticles, the solubility increase is even more considerable. The CuO spherical nanoparticles solubility was also calculated using the Ostwald–Freundlich equation which is known to overestimate the solubility as discussed in this contribution.

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Zhang, Lijuan, Jinhua Lu, Jianfeng Wei, and Yan Wang. "Novel Flower-Like CuO/N-rGO as Enhanced Electrocatalyst for Oxygen Reduction Reaction." Nano 14, no. 10 (October 2019): 1950132. http://dx.doi.org/10.1142/s1793292019501327.

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Flower-like copper oxide (CuO)/nitrogen-doped reduced graphene oxide (N-rGO) was synthesized through a one-pot microwave hydrothermal method by using polyvinylpyrrolidone (PVP) as surfactant. In the process, in situ formation of nanomaterial CuO, reduction of graphene oxide and doping of nitrogen species occurred simultaneously in urea solution. The structural and surface properties of the material were investigated by field emission scanning electron microscopy (FESEM) and transmission electron microscopies (TEM), the energy dispersive spectroscopic (EDS) and powder X-ray diffraction (XRD). This showed the flower-like CuO with an interconnected architecture was successfully uniformed and grown on the surface of N-rGO. Moreover, the surfactant PVP and urea were found to be the key factors to control the morphology of the CuO nanostructure. Electrochemical investigations indicated that the CuO/N-rGO composite exhibited a significantly enhanced ORR activity in comparison to pure CuO and N-rGO in an alkaline solution. The enhancement in ORR activity of CuO/N-rGO composite can be attributed to the synergistic effects of good electron transport from N-rGO as well as abundance of exposed catalytic sites and meso/macroporosity from CuO nanostructures.

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37

Li, Jiang Ying, Bao Juan Xi, Jun Pan, and Yi Tai Qian. "Synthesis and Gas Sensing Properties of Urchin-Like CuO Self-Assembled by Nanorods through a Poly(ethylene glycol)-Assisted Hydrothermal Process." Advanced Materials Research 79-82 (August 2009): 1059–62. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1059.

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Urchin-like CuO, consisting of closely packed nanorods with a diameter of 10nm, have been successfully synthesized by a poly(ethylene glycol) (PEG)-assisted hydrothermal route at low temperature of 100°C. The as-obtained Urchin-like CuO were thoroughly characterized by X-ray diffraction (XRD) study, Field emission scanning electron microscope (FESEM), High-resolution transmission electron microscopy (HRTEM) and Gas sensor measurements. From the XRD pattern, all the peaks detected can be assigned to CuO in a monoclinic structure with lattice parameters a=4.662, b=3.416 and c=5.118 (JCPDS card no. 65-2309). The FESEM and TEM showed that the diameter of the urchin-like CuO sphere is about 1µm. Further investigation of the formation mechanism reveals that the PEG-assisted hydrothermal process is vital to the formation of 3D structures. Besides the template function, PEG often plays as a reductant while reacting with Cu(+2). In our case, no impurity peaks of Cu2O were observed in the XRD pattern, implying that PEG did not reduce Cu(+2) to Cu(+1). We attribute this to the high concentration of PEG. The sensor based on the urchin-like CuO nanostructures exhibit excellent ethanol-sensing properties at reduced working temperature (200°C), which shows a sensitivity two times higher than that of CuO particles(about 100nm, made from calcinations of Cu(NO3)2 at 400°C). The enhancement in sensitivity of the as-prepared CuO may be contributed to the fancy 3D nanostructures.

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38

Rani, B. Jansi, P. Mohana, S. Swathi, R. Yuvakkumar, G. Ravi, M. Thambidurai, Hung D. Nguyen, and Dhayalan Velauthapillai. "Exploration of Bifunctionality in Mn, Co Codoped CuO Nanoflakes for Overall Water Splitting." International Journal of Energy Research 2023 (August 31, 2023): 1–15. http://dx.doi.org/10.1155/2023/6052251.

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Herein, bimetal (Mn, Co) codoping on a CuO host is aimed at enhancing oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity. Codoping of Mn and Co on CuO to enhance bifunctional action in electrochemical water splitting has not yet been investigated to the best of our knowledge. Literatures are focused on unary Mn-doped CuO or Co-doped CuO nanostructures. Mn, Co codoped CuO through an easy chemical coprecipitation method has been successfully attempted and is more beneficial which is the novelty of the present work. Defect-enriched ample active sites (Mn2+/Mn3+ and Co2+/Co3+) along with Cu2+ in the host CuO achieved high current density (100 mA/cm2) in OER and HER with low overpotential such as 468 mV and 271 mV, respectively. Faster charge transfer and diffusion ability was stimulated by the bimetal codoping CuO. Reasonable Tafel plot values (OER: 199 mV/dec, and HER: 21 mV/dec) with improved water-splitting reaction kinetics were achieved for the Mn, Co codoped CuO nanoflakes. The double-layer capacitance ( C dl ) value of 27.5 mF/cm2 for Mn, Co codoped CuO nanoflakes was achieved. Similarly, the increasing order of an electrochemically active surface area (EASA) was exhibited by the consequent addition of bimetal doping on CuO, denoted as Mn , Co / CuO > Co / CuO > Mn / CuO > CuO . The evidence shows that the codoping strategy could facilitate rapid reaction kinetics to develop overall water splitting. The charge transfer resistances ( R ct ) of 3.6 Ω and 1.2 Ω for the Mn, Co codoped CuO nanostructure corresponding to the OER and HER, respectively, were reported. The long-term stability over 16 h with negligible loss was reported for both the OER and the HER performance. Thus, this work contributes to better insight and analysis of the successful codoping of bimetal elements in earth-abundant electrocatalysts to enhance and make practical the electrocatalytic water-splitting activity.

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Mugheri, Abdul Qayoom, Aneela Tahira, Umair Aftab, Muhammad Ishaq Abro, Adeel Liaquat Bhatti, Shahid Ali, Mazhar Ali Abbasi, and Zafar Hussain Ibupoto. "A Low Charge Transfer Resistance CuO Composite for Efficient Oxygen Evolution Reaction in Alkaline Media." Journal of Nanoscience and Nanotechnology 21, no. 4 (April 1, 2021): 2613–20. http://dx.doi.org/10.1166/jnn.2021.19091.

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An efficient, simple, environment-friendly and inexpensive cupric oxide (CuO) electrocatalyst for oxygen evolution reaction (OER) is demonstrated. CuO is chemically deposited on the porous carbon material obtained from the dehydration of common sugar. The morphology of CuO on the porous carbon material is plate-like and monoclinic crystalline phase is confirmed by powder X-ray diffraction. The OER activity of CuO nanostructures is investigated in 1 M KOH aqueous solution. To date, the proposed electrocatalyst has the lowest possible potential of 1.49 V versus RHE (reversible hydrogen electrode) to achieve a current density of 20 mA/cm2 among the CuO based electrocatalysts and has Tafel slope of 115 mV dec-1. The electrocatalyst exhibits an excellent long-term stability for 6 hours along with significant durability. The enhanced catalytic active centers of CuO on the carbon material are due to the porous structure of carbon as well as strong coupling between CuO–C. The functionalization of metal oxides or other related nanostructured materials on porous carbon obtained from common sugar provides an opportunity for the development of efficient energy conversion and energy storage systems.

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40

Wisz, Grzegorz, Paulina Sawicka-Chudy, Maciej Sibiński, Dariusz Płoch, Mariusz Bester, Marian Cholewa, Janusz Woźny, Rostyslav Yavorskyi, Lyubomyr Nykyruy, and Marta Ruszała. "TiO2/CuO/Cu2O Photovoltaic Nanostructures Prepared by DC Reactive Magnetron Sputtering." Nanomaterials 12, no. 8 (April 12, 2022): 1328. http://dx.doi.org/10.3390/nano12081328.

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In this study, titanium dioxide/copper oxide thin-film solar cells were prepared using the reactive direct-current magnetron sputtering technique. The influence of the deposition time of the top Cu contact layer on the structural and electrical properties of photovoltaic devices was analyzed. The structural and morphological characterization of the TiO2/CuO/Cu2O solar cells was fully studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), and current–voltage (I-V) characteristics. Additionally, using van der Pauw sample geometries, the electrical properties of the titanium dioxide and copper oxide layers were investigated. From the XRD study, solar cells were observed in cubic (Cu2O), monoclinic (CuO), and Ti3O5 phases. In addition, the crystallite size and dislocation density for copper oxide layers were calculated. Basic morphological parameters (thickness, mechanism of growth, and composition of elements) were analyzed via scanning electron microscopy. The thicknesses of the titanium dioxide and copper oxide layers were in the range of 43–55 nm and 806–1223 nm, respectively. Furthermore, the mechanism of growth and the basic composition of the elements of layers were analyzed. The I-V characteristic curve confirms the photovoltaic behavior of two titanium dioxide/copper oxide thin-film structures. The values of short-circuit current density (Jsc) and open-circuit voltage (Voc) of the solar cells were: 4.0 ± 0.8 µA/cm2, 16.0 ± 4.8 mV and 0.43 ± 0.61 µA/cm2, 0.54 ± 0.31 mV, respectively. In addition, the authors presented the values of Isc, Pmax, FF, and Rsh. Finally, the resistivity, carrier concentration, and mobility are reported for selected layers with values reflecting the current literature.

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Joshi, Siddharth, Mrunmaya Mudigere, L. Krishnamurthy, and G. L. Shekar. "Growth of Horizontal Nanopillars of CuO on NiO/ITO Surfaces." Journal of Nanoscience 2014 (August 28, 2014): 1–6. http://dx.doi.org/10.1155/2014/635308.

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We have demonstrated hydrothermal synthesis of rectangular pillar-like CuO nanostructures at low temperature (~60°C) by selective growth on top of NiO porous structures film deposited using chemical bath deposition method at room temperature using indium tin oxide (ITO) coated glass plate as a substrate. The growth of CuO not only filled the NiO porous structures but also formed the big nanopillars/nanowalls on top of NiO surface. These nanopillars could have significant use in nanoelectronics devices or can also be used as p-type conducting wires. The present study is limited to the surface morphology studies of the thin nanostructured layers of NiO/CuO composite materials. Structural, morphological, and absorption measurement of the CuO/NiO heterojunction were studied using state-of-the-art techniques like X-ray diffraction (XRD), transmission electron microscopy (SEM), atomic force microscopy (AFM), and UV spectroscopy. The CuO nanopillars/nanowalls have the structure in order of (5 ± 1.0) μm × (2.0 ± 0.3) μm; this will help to provide efficient charge transport in between the different semiconducting layers. The energy band gap of NiO and CuO was also calculated based on UV measurements and discussed.

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42

Senthilkumar, V., Yong Soo Kim, S. Chandrasekaran, Balasubramaniyan Rajagopalan, Eui Jung Kim, and Jin Suk Chung. "Comparative supercapacitance performance of CuO nanostructures for energy storage device applications." RSC Advances 5, no. 26 (2015): 20545–53. http://dx.doi.org/10.1039/c5ra00035a.

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(a)–(c) FE-SEM images of CuO nanoplates on Ni foam, flower-shaped CuO and bud-shaped CuO. (d) Specific capacitance and (d) and (e) Ragone plots of power density vs. energy density according to CuO electrodes in an asymmetrical device.

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Shinde, S. K., D. P. Dubal, G. S. Ghodake, and V. J. Fulari. "Hierarchical 3D-flower-like CuO nanostructure on copper foil for supercapacitors." RSC Advances 5, no. 6 (2015): 4443–47. http://dx.doi.org/10.1039/c4ra11164h.

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Beevi, M. Hussain, S. Vignesh, T. Pandiyarajan, P. Jegatheesan, R. Arthur James, N. V. Giridharan, and B. Karthikeyan. "Synthesis and Antifungal Studies on CuO Nanostructures." Advanced Materials Research 488-489 (March 2012): 666–70. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.666.

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We report, synthesis and antifungal activities of CuO nanoparticles. Particles are prepared through sol-gel method. X-ray diffraction studies show the particles are monoclinic (crystalline) in nature. Scanning electron microscopic measurements are carried out to understand the morphology of the prepared particles. Energy-dispersive X-ray spectroscopic measurements show that the prepared particles containing Cu and O. To identify the local structure of the particles Fourier transform infra red (FTIR) spectroscopic measurements were carried out showing vibrational bands of Cu-O and O-H band. Anti fungal studies were performed on the set of fungal using disk diffusion method and found that the prepared particles are suitable for antifungal activities.

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45

Li, Xiling, Wenfeng Guo, Hui Huang, Tingfang Chen, Moyu Zhang, and Yinshu Wang. "Synthesis and Photocatalytic Properties of CuO Nanostructures." Journal of Nanoscience and Nanotechnology 14, no. 5 (May 1, 2014): 3428–32. http://dx.doi.org/10.1166/jnn.2014.7965.

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Gao, Daqiang, Guijin Yang, Jinyun Li, Jing Zhang, Jinlin Zhang, and Desheng Xue. "Room-Temperature Ferromagnetism of Flowerlike CuO Nanostructures." Journal of Physical Chemistry C 114, no. 43 (October 8, 2010): 18347–51. http://dx.doi.org/10.1021/jp106015t.

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47

Im, Yunhyeok, Carter Dietz, Seung S. Lee, and Yogendra Joshi. "Flower-Like CuO Nanostructures for Enhanced Boiling." Nanoscale and Microscale Thermophysical Engineering 16, no. 3 (July 2012): 145–53. http://dx.doi.org/10.1080/15567265.2012.678564.

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Konar, Suraj, Himani Kalita, Nagaprasad Puvvada, Sangeeta Tantubay, Madhusudan Kr Mahto, Suprakash Biswas, and Amita Pathak. "Shape-dependent catalytic activity of CuO nanostructures." Journal of Catalysis 336 (April 2016): 11–22. http://dx.doi.org/10.1016/j.jcat.2015.12.017.

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Li, D., Y. H. Leung, A. B. Djurišić, Z. T. Liu, M. H. Xie, J. Gao, and W. K. Chan. "CuO nanostructures prepared by a chemical method." Journal of Crystal Growth 282, no. 1-2 (August 2005): 105–11. http://dx.doi.org/10.1016/j.jcrysgro.2005.04.090.

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Wang, Li, Bin Zhao, ZhongYong Yuan, XueJun Zhang, QingDuan Wu, LiXian Chang, and WenJun Zheng. "Syntheses of CuO nanostructures in ionic liquids." Science in China Series B: Chemistry 50, no. 1 (February 2007): 63–69. http://dx.doi.org/10.1007/s11426-007-0016-x.

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Journal articles on the topic 'CUO NANOSTRUCTURES'

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