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Journal articles on the topic 'Zinc Oxide Nanocrystal'

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Author: Grafiati

Published: 14 March 2023

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1

Lysytsya, A. V., M. V. Moroz, B. D. Nechyporuk, B. P. Rudyk, and B. F. Shamsutdinov. "Physical Properties of Zinc Compounds Obtained by Electrolytic Method." Physics and Chemistry of Solid State 22, no. 1 (March 18, 2021): 160–67. http://dx.doi.org/10.15330/pcss.22.1.160-167.

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The influence of the chemical composition of the electrolyte and its temperature on the process of sythesis of nanosized zinc compounds by electrolytic method using zinc electrodes was investigated. X-ray studies have been conducted and its results were used to determine the composition of the obtained nanocrystal samples and its dimensioning using the Debye and the Williamson Hall methods. Comparisons of the results of dimensioning of nanocrystals by both methods were made. Also discussed the possibilities of synthesis of nanoparticles of zinc oxide, zinc sulfide and hydrozincite by electrolytic method. It is shown, that depending on the electrolyte composition, nanocrystals of zinc oxide, zinc sulfide, hydrozincite or their mixture are obtained. The effect of thermal annealing on the samples composition and dimensioning was investigated.

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2

Chai, Zhimin, Xinchun Lu, and Dannong He. "Friction mechanism of zinc oxide films prepared by atomic layer deposition." RSC Advances 5, no. 68 (2015): 55411–18. http://dx.doi.org/10.1039/c5ra05355b.

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3

Long, Mei, Huan Yuan, Ping Sun, Lei Su, and Xiangping Jiang. "UV-Assisted Room Temperature Gas Sensing with ZnO-Ag Heterostructure Nanocrystals Studied by Photoluminescence." Journal of Nanoscience and Nanotechnology 21, no. 9 (September 1, 2021): 4865–69. http://dx.doi.org/10.1166/jnn.2021.19121.

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Noble metal-metal oxide nanohybrids play a significant contribution in gas sensing applications at room temperature. Here, Ag-loaded ZnO with different Ag doping concentration are prepared by two-step polymer-network gel method, and NO2 sensing characteristics are tested at room temperature with various concentrations. The nanocrystal sizes are found to be more uniform with increasing with Ag concentration, and photoluminescence spectroscopy further reveals the different defects in ZnO–Ag nanocrystal lattices: pure ZnO has the largest intensity of the conduction band to valence band combination, and ZnO–Ag-1 (1 mol% Ag doping concentration) has the largest oxygen vacancy content, while ZnO–Ag-3 (3 mol% Ag doping concentration) has the largest excess zinc interstitial. It is showed that the gas sensing properties are independent of the size of nanocrystals, and more dependent on the nanocrystal defect structure. In this work, a new sensing mechanism is proposed according to the experimental results.

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4

Spoerke, Erik D., Matthew T. Lloyd, Yun-ju Lee, Timothy N. Lambert, Bonnie B. McKenzie, Ying-Bing Jiang, Dana C. Olson, Thomas L. Sounart, Julia W. P. Hsu, and James A. Voigt. "Nanocrystal Layer Deposition: Surface-Mediated Templating of Cadmium Sulfide Nanocrystals on Zinc Oxide Architectures." Journal of Physical Chemistry C 113, no. 37 (August 21, 2009): 16329–36. http://dx.doi.org/10.1021/jp900564r.

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5

Neshchimenko, Vitaly, Chundong Li, Mikhail Mikhailov, and Jinpeng Lv. "Optical radiation stability of ZnO hollow particles." Nanoscale 10, no. 47 (2018): 22335–47. http://dx.doi.org/10.1039/c8nr04455d.

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The research is focused on the effect of irradiation by protons and electrons on the optical properties’ stability of zinc oxide hollow particles as compared with ball, star and flower shaped particles, as well as micro- and nanocrystal powders.

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6

Satienpattanakoon, C., D. Yiamsawas, Wiyong Kangwansupamonkon, and R. Nuisin. "Synthesis and Characterization of Zinc Oxide Nanocrystals by Solid-State and Solvothermal Techniques." Advanced Materials Research 55-57 (August 2008): 657–60. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.657.

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The nanostructural zinc oxide (ZnO) particles have been synthesized by two techniques, solid-state reaction and solvothermal method. The solid-state reaction method, the ZnO nanoparticles were carried out by reacting zinc acetate with sodium hydroxide in sodium dodecyl sulfate (SDS) and beta-cyclodextrin (b-CD). The effects of reaction condition on the nanocrystal morphology were investigated. The physical properties of ZnO were characterized using X-ray diffraction technique and transmission electron microscopy. The results showed that the obtained ZnO nanorods were in the wurtzite structure with various sizes of single crystals. FT-IR analysis also confirmed the binding of SDS with ZnO nanorods. For the solvothermal technique, ZnO nanostructures with various morphologies were synthesized from the treatment of zinc acetate at 80°C with the selected polymeric surfactant, poly(vinyl pyrrolidone) (PVP), in aqueous solution and ethylene glycol. The results showed that the selected surfactant and solvent play a different role in controlling the morphologies of the ZnO nanocrystals. The ZnO nanorods and nanoparticles were successfully obtained. The XRD result revealed that the ZnO is in the wurtzite structure with the particle size in range of 270-1300 nm. The optical properties of the samples were also studied via UV-vis spectrophotometer.

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7

Wang, Yazi, Hongfei Hua, Wei Li, Ruili Wang, Xiaoze Jiang, and Meifang Zhu. "Strong antibacterial dental resin composites containing cellulose nanocrystal/zinc oxide nanohybrids." Journal of Dentistry 80 (January 2019): 23–29. http://dx.doi.org/10.1016/j.jdent.2018.11.002.

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8

Lee, S. C., Q. Hu, J. Y. Lee, Y. J. Baek, H. H. Lee, and T. S. Yoon. "Nanocrystal Floating Gate Memory with Indium-Gallium-Zinc-Oxide Channel and Pt-Fe2O3 Core-Shell Nanocrystals." ECS Transactions 50, no. 8 (March 15, 2013): 281–87. http://dx.doi.org/10.1149/05008.0281ecst.

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9

Hu, Quanli, Sang-Hyub Ha, Hyun Ho Lee, and Tae-Sik Yoon. "Nanocrystal floating gate memory with solution-processed indium-zinc-tin-oxide channel and colloidal silver nanocrystals." Semiconductor Science and Technology 26, no. 12 (November 16, 2011): 125021. http://dx.doi.org/10.1088/0268-1242/26/12/125021.

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10

Hue, Ryan J., Rajan Vatassery, Kent R. Mann, and Wayne L. Gladfelter. "Zinc oxide nanocrystal quenching of emission from electron-rich ruthenium-bipyridine complexes." Dalton Transactions 44, no. 10 (2015): 4630–39. http://dx.doi.org/10.1039/c4dt03272a.

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Heteroleptic tris(bipyridine)ruthenium complexes bearing one dicarboxybipyridine ligand bind to dispersed ZnO nanocrystals. Electron releasing amino substituents on the remaining bipyridines raise the excited state potential high enough to allow excited state electron transfer into the ZnO.

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11

Valle, Anderson L., Anielle C. A. Silva, Noelio O. Dantas, Robinson Sabino-Silva, Francielli C. C. Melo, Cleumar S. Moreira, Guedmiller S. Oliveira, Luciano P. Rodrigues, and Luiz R. Goulart. "Application of ZnO Nanocrystals as a Surface-Enhancer FTIR for Glyphosate Detection." Nanomaterials 11, no. 2 (February 17, 2021): 509. http://dx.doi.org/10.3390/nano11020509.

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Glyphosate detection and quantification is still a challenge. After an extensive review of the literature, we observed that Fourier transform infrared spectroscopy (FTIR) had practically not yet been used for detection or quantification. The interaction between zinc oxide (ZnO), silver oxide (Ag2O), and Ag-doped ZnO nanocrystals (NCs), as well as that between nanocomposite (Ag-doped ZnO/AgO) and glyphosate was analyzed with FTIR to determine whether nanomaterials could be used as signal enhancers for glyphosates. The results were further supported with the use of atomic force microscopy (AFM) imaging. The glyphosate commercial solutions were intensified 10,000 times when incorporated the ZnO NCs. However, strong chemical interactions between Ag and glyphosate may suppress signaling, making FTIR identification difficult. In short, we have shown for the first time that ZnO NCs are exciting tools with the potential to be used as signal amplifiers of glyphosate, the use of which may be explored in terms of the detection of other molecules based on nanocrystal affinity.

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12

Okazaki, K., T. Shimogaki, M. Higashihata, D. Nakamura, and T. Okada. "Synthesis and Nano-Processing of ZnO Nano-Crystals for Controlled Laser Action." MRS Proceedings 1439 (2012): 121–26. http://dx.doi.org/10.1557/opl.2012.1155.

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ABSTRACTLasing characteristics of a single Zinc oxide (ZnO) nanosheet and a single ZnO nanowire were investigated by an ultraviolet light excitation. ZnO nanocrystals were synthesized by chemical vapor deposition (CVD) method, and those ZnO nanocrystals were excited by a third-harmonic Q-switched Nd:YAG laser beam (355 nm, 5 ns). The emission spectra from a single ZnO nanocrystal was collected by an objective lens with a magnification factor of 100 or 50, coupled with a spectrometer with a light fiber. The area observed by the spectrometer is about 10 μm in diameter, and therefore the emission spectra from a single ZnO nanocrystal can be observed. The emission spectra showed the obvious lasing characteristics having mode structure and a threshold for lasing. The lasing threshold power density of a ZnO nanosheet and a ZnO nanowire were measured to be about 60 kW/cm2 and 150 kW/cm2, respectively. ZnO nanosheet can be a superior laser medium due to the lower threshold for lasing compared to the threshold of the ZnO nanowire. However, since the lasing spectra had mode structure, a single-longitudinal mode lasing would be required for a practical application. The single longitudinal mode lasing can be realized by a nanomachining of a grating on the ZnO nanocrystal surface due to distributed bragg reflector (DBR) laser. The minimum DBR pitch was estimated to be about 81 nm, which can be machined by focused-ion beam (FIB) focused up to 7 nm at minimum, and therefore, we demonstrated the nanomachining on a single ZnO nanowire. However, the single-longitudinal mode lasing was not observed so far, and thus optimization of experimental conditions such as the DBR pitch, ion dose amount and increasing the number of repetition of DBR would be required.

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13

Sharma, Priyanka R., Sunil K. Sharma, Richard Antoine, and Benjamin S. Hsiao. "Efficient Removal of Arsenic Using Zinc Oxide Nanocrystal-Decorated Regenerated Microfibrillated Cellulose Scaffolds." ACS Sustainable Chemistry & Engineering 7, no. 6 (February 14, 2019): 6140–51. http://dx.doi.org/10.1021/acssuschemeng.8b06356.

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14

Chen, Lun-Chun, Yung-Chun Wu, Tien-Chun Lin, Jyun-Yang Huang, Min-Feng Hung, Jiang-Hung Chen, and Chun-Yen Chang. "Poly-Si Nanowire Nonvolatile Memory With Nanocrystal Indium–Gallium–Zinc–Oxide Charge-Trapping Layer." IEEE Electron Device Letters 31, no. 12 (December 2010): 1407–9. http://dx.doi.org/10.1109/led.2010.2076271.

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15

Murzin, Serguei P. "Formation of ZnO/CuO Heterostructures Based on Quasi-One-Dimensional Nanomaterials." Applied Sciences 13, no. 1 (December 30, 2022): 488. http://dx.doi.org/10.3390/app13010488.

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Nanostructured metal oxides are of great interest both for advanced research and for a wide range of applications that contribute to the increasing demands of electronics, photonics, catalysis, sensorics, and other high-tech industries and are being actively researched and developed. One-dimensional nanocrystal arrays of copper and zinc oxides have become prominent in optoelectronic devices and energy conversion systems. However, although desirable improved properties have been demonstrated, the morphology of materials containing copper and zinc oxide nanowires is extremely sensitive to synthesis conditions and difficult to control. Studies focused on the morphology control of such quasi-one-dimensional materials are not numerous, so the consideration of this issue is still relevant. The characteristics of devices based on such oxide materials can be improved by taking advantage of nanoheterojunctions. A special feature is the possibility of forming a polycrystalline heterojunction in a system of semiconductors belonging to different crystalline syngonies. Currently, much attention is devoted to developing reliable methods of obtaining such nanomaterials, including those, based on processes exploiting novel physical effects. Possibilities of synthesis by pulse-periodic laser irradiation of arrays of quasi-one-dimensional ZnO nanostructures with varying micromorphology on metallic substrates, as well as the creation of ZnO/CuO heterostructures based on ZnO nanowires, were considered. The main distinguishing feature of this approach was the use of laser-induced vibrations to intensify diffusion processes in the solid phase of metallic materials as compared to the simple effects of laser beam heating. Expanding the area of application of the advanced method of creating oxide heterostructures requires a detailed and comprehensive study of new possibilities used to form structures with improved physical properties.

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16

Kim, Sae-Wan, JinBeom Kwon, Jae-Sung Lee, Byoung-Ho Kang, Sang-Won Lee, Dong Geon Jung, Jun-Yeop Lee, et al. "An Organic/Inorganic Nanomaterial and Nanocrystal Quantum Dots-Based Multi-Level Resistive Memory Device." Nanomaterials 11, no. 11 (November 9, 2021): 3004. http://dx.doi.org/10.3390/nano11113004.

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A cadmium selenide/zinc sulfide (CdSe/ZnS) quantum dot (QD)-based multi-level memory device with the structure [ITO/PEDOT:PSS/QDs/ZnO/Al:Al2O3/QDs/Al] was fabricated via a spin-coating method used to deposit thin films. Two layers of QD thin films present in the device act as charge storage layers to form three distinct states. Zinc oxide (ZnO) and aluminum oxide (Al2O3) were added to prevent leakage. ZnO NPs provide orthogonality between the two QD layers, and a poly(3,4-ethylenedioxythio-phene): poly(styrenesulfonate) (PEDOT:PSS) thin film was formed for effective hole injection from the electrodes. The core/shell structure of the QDs provides the quantum well, which causes the trapping of injected charges. The resistance changes according to the charging and discharging of the QDs’ trap site and, as a result, the current through the device also changes. There are two quantum wells, two current changes, and three stable states. The role of each thin film was confirmed through I–V curve analysis and the fabrication conditions of each thin film were optimized. The synthesized QDs and ZnO nanoparticles were evaluated via X-ray diffraction, transmission electron microscopy, and absorbance and photoluminescence spectroscopy. The measured write voltages of the fabricated device were at 1.8 and 2.4 V, and the erase voltages were −4.05 and −4.6 V. The on/off ratio at 0.5 V was 2.2 × 103. The proposed memory device showed retention characteristics of ≥100 h and maintained the initial write/erase voltage even after 200 iterative operations.

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17

Wang, Duan-Chao, Hou-Yong Yu, Mei-Li Song, Ren-Tong Yang, and Ju-Ming Yao. "Superfast Adsorption–Disinfection Cryogels Decorated with Cellulose Nanocrystal/Zinc Oxide Nanorod Clusters for Water-Purifying Microdevices." ACS Sustainable Chemistry & Engineering 5, no. 8 (July 25, 2017): 6776–85. http://dx.doi.org/10.1021/acssuschemeng.7b01029.

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18

Farha, Ashraf H., Mervat M. Ibrahim, and Shehab A. Mansour. "Ga-Doped ZnO Nanostructured Powder for Cool-Nanopigment in Environment Applications." Materials 13, no. 22 (November 16, 2020): 5152. http://dx.doi.org/10.3390/ma13225152.

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Gallium (Ga) doped zinc oxide (ZnO) nanocrystals were successfully synthesized via a γ-radiation-assisted polymer-pyrolysis route. Ga doped ZnO samples with Ga and ZnO precursor salts with molar ratios of 0%, 3%, 5%, and 10% were produced. A γ-radiation dosage of 1.5 kGy was used for polymerization initiation during the sample preparation. The properties of the obtained nanocrystal samples were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), UV-visible absorption, NIR-VIS-UV diffused reflectance, and high-resolution transmission electron microscopy (HR-TEM) characterization techniques. XRD results revealed the formation of ZnO nanocrystals with wurtzite structure for both Ga-doped and undoped ZnO samples. Noticeable increasing in the line broadening of the XRD peaks as well as pronounced decreasing of crystallite size were observed with the increasing Ga ratio in the samples. Optical peaks around Ga:ZnO samples showed a blueshift in the optical absorption peaks with increasing Ga content. These results are in good agreement with the dependency of crystallites size as well as grain size on Ga ratio obtained from XRD and TEM images, which make them fit well for the powder cool-pigment applications. The doped samples showed high values of NIR reflectance (RNIR*) with percentage varied from 84.25% to 89.05% that enabled them to qualify for cool-nanopigment applications. Furthermore, such doped samples registered low values of visible reflectance (RVIS*) that enabled to reduce the glare from the reflected visible sunlight.

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19

Hu, Dong Dong, Xiao Cai Yu, Min Zhang, Ji Yao Guo, and Xv Zheng. "Study on the Photocatalytic Degradation of Diesel Pollutants in Seawater by a Sonochemically Prepared Nano Zinc Oxide." Advanced Materials Research 476-478 (February 2012): 1939–42. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1939.

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Semiconductor ZnO nanocrystal has been synthesized by a sonochemical method and characterized by XRD and SEM techniques. The results indicate that the as-prepared ZnO is of hexagonal wurtzite structure. The photocatalytic degradation of diesel pollutants in seawater is investigated by utilization of ZnO in simulated diesel-polluted seawater exposed to UV irradiation. In the experiment, the influences of ZnO dosage, initial concentration of diesel, pH value, photocatalytic degradation reaction time and the presence of assistance oxidant peroxide, respectively, on the diesel pollutants removal from seawater are investigated. A systematic optimization study is carried out through a orthogonal test on the basis of the results of the single-factor experiments. It reveals that when the experiment is undertaken under the very condition: the ZnO dosage is 1g/L, the initial concentration of diesel 1g/L, the pH value 7, the reaction time 3h and the concentration of peroxide 0.16%, the removal rate of diesel pollutants in seawater is expected to reach 84 %.

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20

Elbashar, Y. H., M. A. Mohamed, A. M. Badr, H. A. Elshaikh, and Diaa A. Rayan. "X-ray spectroscopic analysis of nanocrystal phase growth in cobalt oxide-doped copper zinc sodium phosphate glass matrix." Journal of Optics 50, no. 2 (January 11, 2021): 253–56. http://dx.doi.org/10.1007/s12596-021-00679-x.

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21

Tanuševski, Atanas, and Verka Georgieva. "Optical and electrical properties of nanocrystal zinc oxide films prepared by dc magnetron sputtering at different sputtering pressures." Applied Surface Science 256, no. 16 (June 2010): 5056–60. http://dx.doi.org/10.1016/j.apsusc.2010.03.059.

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22

Yu, Hou-Yong, Guo-Yin Chen, Yi-Bo Wang, and Ju-Ming Yao. "A facile one-pot route for preparing cellulose nanocrystal/zinc oxide nanohybrids with high antibacterial and photocatalytic activity." Cellulose 22, no. 1 (November 12, 2014): 261–73. http://dx.doi.org/10.1007/s10570-014-0491-0.

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23

Abdalkarim, Somia Yassin Hussain, Hou-Yong Yu, Chuang Wang, Lin-Xi Huang, and Juming Yao. "Green synthesis of sheet-like cellulose nanocrystal–zinc oxide nanohybrids with multifunctional performance through one-step hydrothermal method." Cellulose 25, no. 11 (August 28, 2018): 6433–46. http://dx.doi.org/10.1007/s10570-018-2011-0.

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24

Vu, An Nang, Anh Mai Tran, Nghi Tuyet Nguyen, Duyen My Ngoc Lam, Phong Pham Nam Le, Nhan Thuc Chi Ha, and Hieu Van Le. "Green one-step synthesis of cellulose nanocrystal/ ZnO nanohybrid with high photocatalytic activity." Science and Technology Development Journal - Natural Sciences 5, no. 3 (May 29, 2021): first. http://dx.doi.org/10.32508/stdjns.v5i3.924.

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In this work, nanohybrid of zinc oxide/ cellulose nanocrystals (ZnO/CNC) was successfully prepared by using a low cost and green method for photocatalytic degradation of methylene blue (MB). CNC had been derived through the hydrolysis reaction by citric/hydrochloric acid from the pure cellulose isolated from Vietnamese Nypa fruticans trunk. The obtained CNC with carboxyl groups could act as a stabilizing and supporting agent to anchor ZnO nanoparticles. The chemical and crystal structures, morphology, thermal and photocatalytic properties of the ZnO/CNC nanohybrid were characterized by FESEM, FTIR, XRD, FESEM, BET, EDX, TGA, DRS and photocatalytic tests. Analyses of FTIR spectra, XRD, and FESEM indicated that the ZnO nanocrystals with the size of 50 nm formed and loaded on the surface of CNC. The TGA analysis demonstrated that the ZnO loading sample (ZnO/CNC) had the thermal degradation onset temperature higher than that of neat CNC. ZnO/CNC cuold be absorpted ultraviolet light and have high value of specific surface area (SBET), based on the DRS spectra and the nitrogen adsorption – desorption isotherms analysis, respectively. ZnO/CNC displayed more photocatalytic activity than pure ZnO upon degradation of methylene blue due to strong interaction between the CNC and ZnO nanoparticles. The maximum degradation of MB was about 95% in 150 minutes for the ZnO/CNC.

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25

Il’ves, V. G., and S. Yu Sokovnin. "Structural and Magnetic Properties of Nanopowders and Coatings of Carbon-Doped Zinc Oxide Prepared by Pulsed Electron Beam Evaporation." Journal of Nanotechnology 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/4628193.

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With the help of electron beam evaporation of mechanical mixtures of nonmagnetic micron powders ZnO and carbon in vacuum with the subsequent annealing of evaporation products in air at the temperature of 773 K, single-phase crystal nanopowders ZnO-C were produced with the hexagonal wurtzite structure and low content of the carbon dopant not exceeding 0.25 wt%. It was established that doping ZnO with carbon stimulates primary growth of nanoparticles along the direction 0001 in the coatings. Nanocrystal growth in coatings occurs in the same way as crystal growth in thin films, with growth anisotropy in the c-axis direction in wurtzite ZnO. Element mapping has confirmed homogeneous distribution of carbon in ZnO lattice. Ferromagnetism of single-phase crystal nanopowders ZnO-C with the hexagonal wurtzite structure and low content of the carbon dopant not exceeding 0.25 wt% was produced at room temperature. Ferromagnetic response of the doped NP ZnO-C has exceeded the ferromagnetic response of pure NP ZnO 5 times. The anhysteretic form of magnetization curves NP ZnO-C indicates aspiration of samples to superparamagnetism manifestation.

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26

., Alok Ranjan. "NANOPARTICLE BASED CHARGE TRAPPING MEMORY DEVICE APPLYING MOS TECHNOLOGY: A COGNITIVE APPROACH USING POLYVINYL ALCOHOL CAPPED ZINC OXIDE NANOCRYSTAL." International Journal of Research in Engineering and Technology 02, no. 01 (January 25, 2013): 39–42. http://dx.doi.org/10.15623/ijret.2013.0201008.

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27

Wang, ChunLan, XingQiang Liu, XiangHeng Xiao, YueLi Liu, Wen Chen, JinChai Li, GuoZhen Shen, and Lei Liao. "High-Mobility Solution-Processed Amorphous Indium Zinc $\hbox{Oxide/In}_{2}\hbox{O}_{3}$ Nanocrystal Hybrid Thin-Film Transistor." IEEE Electron Device Letters 34, no. 1 (January 2013): 72–74. http://dx.doi.org/10.1109/led.2012.2226425.

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28

Park, Byoungnam. "Simultaneous study of exciton dissociation and charge transport in a light harvesting assembly: Lead selenide nanocrystal/zinc oxide interface." Thin Solid Films 597 (December 2015): 165–70. http://dx.doi.org/10.1016/j.tsf.2015.11.049.

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29

Dharani, A. P., A. Sales Amalraj, S. Christina Joycee, V. Sivakumar, and G. Senguttuvan. "Influence of Seed Layer on Surface Morphology of ZnO Thin Films Grown by SILAR Method." International Journal of Nanoscience 19, no. 02 (March 16, 2020): 1950005. http://dx.doi.org/10.1142/s0219581x19500054.

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Zinc oxide (ZnO) nanostructured seed layer was grown by successive ionic layer adsorption and reaction (SILAR) method on glass substrate. The as-prepared nanostructured seed layer was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) for its structure and surface morphology. XRD results showed a ZnO seed layer growth oriented along the (100) direction. Study of surface morphology showed ZnO nanocrystal clusters with hexagonal shape. ZnO nanorods (NRs) have been grown over the as-prepared ZnO nanostructured seed layer by immersing seed layer substrate in a chemical bath. It has been found that the morphology of the nanostructured seed layer is a key influencing factor for the growth of vertical ZnO NRs. In our growth method, we were successful in growing vertical NRs with diameter of about 100–240[Formula: see text]nm with perfect hexagonal shape. The transmittance studies were carried out to analyze the optical bandgap of the as-grown ZnO nanorods.

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30

Huang, Jung Y., Liu S. Li, and Ming C. Chen. "Probing Molecular Binding Effect from Zinc Oxide Nanocrystal Doping in Surface-Stabilized Ferroelectric Liquid Crystal with Two-Dimensional Infrared Correlation Technique." Journal of Physical Chemistry C 112, no. 14 (March 18, 2008): 5410–15. http://dx.doi.org/10.1021/jp710778s.

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31

Wang, Yan Yan, Hou-Yong Yu, Lili Yang, Somia Yassin Hussain Abdalkarim, and Wei-Lai Chen. "Enhancing long-term biodegradability and UV-shielding performances of transparent polylactic acid nanocomposite films by adding cellulose nanocrystal-zinc oxide hybrids." International Journal of Biological Macromolecules 141 (December 2019): 893–905. http://dx.doi.org/10.1016/j.ijbiomac.2019.09.062.

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32

Park, Byoungnam, Hyungduk Ko, and Minkyong Kim. "Simultaneous probing of nanocrystal (NC)-ligand interaction-induced charge transfer/transport properties at the electron donor (lead selenide NC)/acceptor (zinc oxide) functional interface." Physica B: Condensed Matter 553 (January 2019): 40–46. http://dx.doi.org/10.1016/j.physb.2018.10.016.

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33

Kasarla, Sarveshwar, Vimala Saravanan, Vidhya Prasanth, and Manjula Selvam. "The Influence of Thermoelectric Properties of Nanomaterial and Applications." Journal on Materials and its Characterization 1, no. 1 (December 1, 2022): 1–5. http://dx.doi.org/10.46632/jmc/1/1/1.

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To assess the thermoelectric qualities of low-dimensional materials, a nanomaterial was created. Due to its inherent nanoscale structure, a one-dimensional thermoelectric material is predicted to have superior thermoelectric characteristics and low heat conductivity. High efficiency thermoelectric energy conversion devices can be realised by taking use of these better features. Graphene and hexagonal boron nitride (h-BN), two-dimensional nanomaterials, are thermally efficient. Due to the differences in the crystal lattice and electrical structure between graphene and h-BN, a new material with novel thermal properties is created when the two join to produce a planar C-BN hybrid structure or a van der Waals heterostructure. We concentrate on these new qualities while reviewing the two new materials, as their thermal properties affect their structure, size, and number of layers. To assess the thermoelectric qualities of low-dimensional materials, a micro-instrument was created. Due to its inherent nanoscale structure, a one-dimensional thermoelectric material is predicted to have superior thermoelectric characteristics and low heat conductivity. High efficiency thermoelectric energy conversion devices can be realised by taking use of these better features. In this study, we used micromachining to create microdevices to examine the thermoelectric characteristics of low-dimensional materials. The system comprises of a tiny thermocouple with a freely suspended heating element acting as the sensing element. Manipulation was used to place an array of Bi2Te3 nanowires made using the silicon template approach on the microdevice. To show the device’s ability to assess the thermoelectric properties of nanomaterials, measurements of the Bi2Te3 bundle’s electrical, thermal, and Beck coefficients were made. More information about this source text source text necessary for further translation details. We offer a synthetic method for producing Cu2ZnGeSe4 nanocrystals with a limited size range and a predetermined composition. By hot pressing, these nanocrystals were employed to create nanomaterials that were tightly packed. These nanoparticles’ Cu2ZnGeSe4 thermoelectric characteristics have been demonstrated to be very good. A figure of merit of up to 0.55 at 450 °C has already been achieved through early refinement of the nanocrystal composition. The performance of thermoelectric (TE) materials is currently the subject of intense research. One of the suggestions for enhancing their TE performance is nanostructuring. However, a nanomaterial’s shape can have a big impact on how it behaves under tension. In this study, we showed that this action uses a microwave-assisted chemical pathway to create zinc oxide (ZnO) in two distinct forms. The molar ratios of the initial precursors were altered to create nanoparticles (NPs) and nanorods (NRs). According to the results, NRs have better TE properties than NPs, especially at higher temperatures.

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34

Figueroa-Lopez, Kelly, Sergio Torres-Giner, Inmaculada Angulo, Maria Pardo-Figuerez, Jose Escuin, Ana Bourbon, Luis Cabedo, Yuval Nevo, Miguel Cerqueira, and Jose Lagaron. "Development of Active Barrier Multilayer Films Based on Electrospun Antimicrobial Hot-Tack Food Waste Derived Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and Cellulose Nanocrystal Interlayers." Nanomaterials 10, no. 12 (November 27, 2020): 2356. http://dx.doi.org/10.3390/nano10122356.

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Active multilayer films based on polyhydroxyalkanoates (PHAs) with and without high barrier coatings of cellulose nanocrystals (CNCs) were herein successfully developed. To this end, an electrospun antimicrobial hot-tack layer made of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) derived from cheese whey, a by-product from the dairy industry, was deposited on a previously manufactured blown film of commercial food contact PHA-based resin. A hybrid combination of oregano essential oil (OEO) and zinc oxide nanoparticles (ZnONPs) were incorporated during the electrospinning process into the PHBV nanofibers at 2.5 and 2.25 wt%, respectively, in order to provide antimicrobial properties. A barrier CNC coating was also applied by casting from an aqueous solution of nanocellulose at 2 wt% using a rod at 1m/min. The whole multilayer structure was thereafter assembled in a pilot roll-to-roll laminating system, where the blown PHA-based film was located as the outer layers while the electrospun antimicrobial hot-tack PHBV layer and the barrier CNC coating were placed as interlayers. The resultant multilayer films, having a final thickness in the 130–150 µm range, were characterized to ascertain their potential in biodegradable food packaging. The multilayers showed contact transparency, interlayer adhesion, improved barrier to water and limonene vapors, and intermediate mechanical performance. Moreover, the films presented high antimicrobial and antioxidant activities in both open and closed systems for up to 15 days. Finally, the food safety of the multilayers was assessed by migration and cytotoxicity tests, demonstrating that the films are safe to use in both alcoholic and acid food simulants and they are also not cytotoxic for Caco-2 cells.

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35

Duraia, El-Shazly M., G. W. Beall, Zulkhair A. Mansurov, Tatyana A. Shabanova, and Ahmed E. Hannora. "Elongated Wire-Like Zinc Oxide Nanostructures Synthesized from Metallic Zinc." Eurasian Chemico-Technological Journal 15, no. 1 (December 24, 2012): 19. http://dx.doi.org/10.18321/ectj135.

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Elongated wire-like Zinc oxide, nanocombs and nanocrystals have been successfully synthesized on the silicon substrate from the metallic zinc as a starting material. The annealing temperature was as low as 450 ºC in argon atmosphere mixed with about 3% oxygen. Structural analysis using the X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) showed that the existence of two phases; nanowires and crystalline form. Moreover some nanoparticles aggregates were noticed to be attached in the bulk to the sides of the ZnO nanocrystals and sometimes these aggregate attached to the Zinc oxide hexagonal crystal and grow to form nanowire at different angles. Scanning electron microscopy (SEM) investigations for the zinc oxide nanostructure on the silicon substrate showed the formation of the nanocrystals in the gas flow direction and at the low energy sites over the silicon substrate. Photoluminescence (PL) measurements, performed at the room temperature, showed the existence of two basic emissions: narrow ultraviolet (UV) emission at 398 nm which attributed to the near band edge emission of the wide band gap and a very wide, more intensive, green emission at 471 nm corresponds to the crystal defects such as vacancies, interstitial sites in ZnO.

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36

Dumontel, B., M. Canta, H. Engelke, A. Chiodoni, L. Racca, A. Ancona, T. Limongi, G. Canavese, and V. Cauda. "Enhanced biostability and cellular uptake of zinc oxide nanocrystals shielded with a phospholipid bilayer." Journal of Materials Chemistry B 5, no. 44 (2017): 8799–813. http://dx.doi.org/10.1039/c7tb02229h.

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The surface chemistry and charge of zinc oxide nanocrystals influence their behaviour in biological fluids. A novel lipid bilayer assembly is developed to shield ZnO nanocrystals improving their stability and cell internalization.

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Bodke, M. R., Y. Purushotham, and B. N. Dole. "Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods." Cerâmica 64, no. 369 (March 2018): 91–96. http://dx.doi.org/10.1590/0366-69132018643692207.

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Abstract Zinc oxide nanocrystals were synthesized by two precipitation methods successfully. The nanocrystals prepared via method I (zinc acetate dihydrate precipitation with KOH) were smaller in crystallite size (~20 nm) as compared to method II (zinc nitrate hexahydrate precipitation with N,N-dimethylformamide, ~33 nm). FTIR technique was used to study chemical bonding; SEM and EDS were used to study morphology and chemical compositions. Number of concentric rings corresponding to diffraction peaks was higher in SAED pattern for ZnO nanocrystals synthesized by method I than II. Variation in the energy band gap as a function of particle size was determined using absorption spectra from UV-vis-NIR spectrophotometer. Redshift was observed in the energy band gap of sample prepared via method II. Particle size and the structure of the nanocrystals were analysed by transmission electron microscope (TEM). From TEM study, it was found that the average particle size of method I nanocrystals was smaller compared to method II nanocrystals. Magnetic study was carried out using VSM. Ferromagnetism like contribution was observed for the sample prepared by method II.

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38

Kaviyarasu, K., C. Maria Magdalane, E. Manikandan, M. Jayachandran, R. Ladchumananandasivam, S. Neelamani, and M. Maaza. "Well-Aligned Graphene Oxide Nanosheets Decorated with Zinc Oxide Nanocrystals for High Performance Photocatalytic Application." International Journal of Nanoscience 14, no. 03 (May 19, 2015): 1550007. http://dx.doi.org/10.1142/s0219581x15500076.

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Graphene oxide (GO) nanosheets modified with zinc oxide nanocrystals were achieved by a green wet-chemical approach. As-obtained products were characterized by XRD, Raman spectra, XPS, HR-TEM, EDS, PL and Photocatalytic studies. XRD studies indicate that the GO nanosheet have the same crystal structure found in hexagonal form of ZnO . The enhanced Raman spectrum of 2D bands confirmed formation of single layer graphene oxides. The gradual photocatalytic reduction of the GO nanosheet in the GO : ZnO suspension of ethanol was studied by using X-ray photoelectron (XPS) spectroscopy. The nanoscale structures were observed and confirmed using high resolution transmission electron microscopy (HR-TEM). The evolution of the elemental composition, especially the various numbers of layers were determined from energy dispersive X-ray spectra (EDS). PL properties of GO : ZnO nanosheet were found to be dependent on the growth condition and the resultant morphology revealed that GO nanosheet were highly transparent in the visible region. The photocatalytic performance of GO : ZnO nanocomposites was performed under UV irradiation. Therefore, the ZnO nanocrystals in the GO : ZnO composite could be applied in gradual chemical reduction and consequently tuning the electrical conductivity of the graphene oxide nanosheet.

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Shinde, Pratibha, Vidhika Sharma, Ashvini Punde, Ashish Waghmare, Priti Vairale, Yogesh Hase, Subhash Pandharkar, et al. "2D alignment of zinc oxide@ZIF8 nanocrystals for photoelectrochemical water splitting." New Journal of Chemistry 45, no. 7 (2021): 3498–507. http://dx.doi.org/10.1039/d0nj05567k.

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Thin films of zinc oxide nano-sheets loaded with Zeolitic Imidazole Framework 8 nanocrystals were synthesized using electrodeposition and chemical bath deposition for photoelectrochemical application.

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40

Bai, Sai, Shasha He, Yizheng Jin, Zhongwei Wu, Zhouhui Xia, Baoquan Sun, Xin Wang, et al. "Electrophoretic deposited oxide thin films as charge transporting interlayers for solution-processed optoelectronic devices: the case of ZnO nanocrystals." RSC Advances 5, no. 11 (2015): 8216–22. http://dx.doi.org/10.1039/c4ra09765c.

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A promising fabrication method of electron transporting interlayers for solution-processed optoelectronic devices by electrophoretic deposition (EPD) of colloidal zinc oxide (ZnO) nanocrystals was demonstrated.

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Merchan-Merchan, Wilson, and Moien Farmahini Farahani. "Flame synthesis of zinc oxide nanocrystals." Materials Science and Engineering: B 178, no. 2 (February 2013): 127–34. http://dx.doi.org/10.1016/j.mseb.2012.10.031.

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Oprea, Madalina, and Denis Mihaela Panaitescu. "Nanocellulose Hybrids with Metal Oxides Nanoparticles for Biomedical Applications." Molecules 25, no. 18 (September 4, 2020): 4045. http://dx.doi.org/10.3390/molecules25184045.

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Cellulose is one of the most affordable, sustainable and renewable resources, and has attracted much attention especially in the form of nanocellulose. Bacterial cellulose, cellulose nanocrystals or nanofibers may serve as a polymer support to enhance the effectiveness of metal nanoparticles. The resultant hybrids are valuable materials for biomedical applications due to the novel optical, electronic, magnetic and antibacterial properties. In the present review, the preparation methods, properties and application of nanocellulose hybrids with different metal oxides nanoparticles such as zinc oxide, titanium dioxide, copper oxide, magnesium oxide or magnetite are thoroughly discussed. Nanocellulose-metal oxides antibacterial formulations are preferred to antibiotics due to the lack of microbial resistance, which is the main cause for the antibiotics failure to cure infections. Metal oxide nanoparticles may be separately synthesized and added to nanocellulose (ex situ processes) or they can be synthesized using nanocellulose as a template (in situ processes). In the latter case, the precursor is trapped inside the nanocellulose network and then reduced to the metal oxide. The influence of the synthesis methods and conditions on the thermal and mechanical properties, along with the bactericidal and cytotoxicity responses of nanocellulose-metal oxides hybrids were mainly analyzed in this review. The current status of research in the field and future perspectives were also signaled.

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43

Gusatti, Marivone, Carlos Eduardo Maduro de Campos, Gilvan Sérgio Barroso, Daniel Aragão Ribeiro de Souza, Humberto Gracher Riella, and Nivaldo Cabral Kuhnen. "Preparation and Characterization of ZnO Nanostructures with Different Precursors via Solochemical Technique." Applied Mechanics and Materials 121-126 (October 2011): 1813–17. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1813.

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In this work, the precursors zinc nitrate hexahydrate and zinc chloride were used to synthesize zinc oxide (ZnO) nanocrystals, applying a simple solochemical technique. ZnO rod-like nanostructures were successfully obtained by chemical reaction between NaOH and zinc nitrate hexahydrate at 90 °C. The sample formed by chemical reaction between NaOH and zinc chloride at 90 °C showed the ZnO phase mixed with the Zn5(OH)8Cl2•H2O phase. Only after thermal treatment at 500 °C for 3 hours, the conversion of Zn5(OH)8Cl2•H2O in ZnO was achieved. The samples prepared with different precursors were characterized by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. Rietveld analysis to the X-ray diffraction data indicated that ZnO nanocrystals obtained have hexagonal wurtzite structure and nanometric-sized crystallites.

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Šutka, Andris, Martin Timusk, Nicola Döbelin, Rainer Pärna, Meeri Visnapuu, Urmas Joost, Tanel Käämbre, Vambola Kisand, Kristjan Saal, and Maris Knite. "Correction: A straightforward and “green” solvothermal synthesis of Al doped zinc oxide plasmonic nanocrystals and piezoresistive elastomer nanocomposite." RSC Advances 5, no. 88 (2015): 72070. http://dx.doi.org/10.1039/c5ra90079d.

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Correction for ‘A straightforward and “green” solvothermal synthesis of Al doped zinc oxide plasmonic nanocrystals and piezoresistive elastomer nanocomposite’ by Andris Šutka et al., RSC Adv., 2015, 5, 63846–63852.

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Szlachetko, Jakub, Adam Kubas, Anna Maria Cieślak, Kamil Sokołowski, Łukasz Mąkolski, Joanna Czapla-Masztafiak, Jacinto Sá, and Janusz Lewiński. "Hidden gapless states during thermal transformations of preorganized zinc alkoxides to zinc oxide nanocrystals." Materials Horizons 5, no. 5 (2018): 905–11. http://dx.doi.org/10.1039/c8mh00106e.

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46

Shvalagin, Vitaliy, Galyna Grodziuk, Olha Sarapulova, Misha Kurmach, Vasyl Granchak, and Valentyn Sherstiuk. "Influence of Nanosized Silicon Oxide on the Luminescent Properties of ZnO Nanoparticles." Journal of Nanotechnology 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2708638.

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For practical use of nanosized zinc oxide as the phosphor its luminescence quantum yields should be maximized. The aim of this work was to enhance luminescent properties of ZnO nanoparticles and obtain high-luminescent ZnO/SiO2composites using simpler approaches to colloidal synthesis. The luminescence intensity of zinc oxide nanoparticles was increased about 3 times by addition of silica nanocrystals to the source solutions during the synthesis of ZnO nanoparticles. Then the quantum yield of luminescence of the obtained ZnO/SiO2composites is more than 30%. Such an impact of silica is suggested to be caused by the distribution of ZnO nanocrystals on the surface of silica, which reduces the probability of separation of photogenerated charges between the zinc oxide nanoparticles of different sizes, and as a consequence, there is a significant increase of the luminescence intensity of ZnO nanoparticles. This way of increasing nano-ZnO luminescence intensity facilitates its use in a variety of devices, including optical ultraviolet and visible screens, luminescent markers, antibacterial coatings, luminescent solar concentrators, luminescent inks for security printing, and food packaging with abilities of informing consumers about the quality and safety of the packaged product.

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47

Panasyuk, Yaroslav V., Oleskandra E. Rayevska, Oleksandr L. Stroyuk, and Stepan Ya Kuchmiy. "A new mild synthesis and optical properties of colloidal ZnO nanocrystals in dimethylformamide/ethanol solutions." MRS Proceedings 1617 (2013): 119–24. http://dx.doi.org/10.1557/opl.2013.1174.

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ABSTRACTA green and mild synthesis of colloidal zinc oxide nanocrystals in ethanol/dimethylformamide mixtures was introduced which allows to produce stable crystalline ZnO particles and tailor their average size in the range of 2.8−4.5 nm by varying temperature and duration of post-synthesis ageing. An increase in dimethylformamide fraction in the mixture results in acceleration of ZnO nanocrystals ripening. Colloidal ZnO nanocrystals emit broadband photoluminescence in the range of 2−3 eV with the quantum yields of up to 12 %.

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48

Villanueva-Ibáñez, Maricela, P. N. Rivera-Arzola, and M. A. Flores González. "Structural Evolution of ZnO Polyol-Derived Nanomaterials." Materials Science Forum 691 (June 2011): 72–76. http://dx.doi.org/10.4028/www.scientific.net/msf.691.72.

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Zinc oxide (ZnO) has been intensively used in several technological applications. ZnO nanostructures with different morphologies are typically produced using the solid-vapor phase, hydrothermal methods, electrochemical deposition, molecular beam epitaxy and soft chemical solution methods. We have synthesized ZnO in diethyleneglycol using zinc acetate or zinc nitrate as a precursor compound. The morphology and the size of the resulting oxide particles were adjusted by using an acidic medium. The nanomaterials annealed at different temperatures (500-1000 °C) were structurally characterized and the morphology was observed. The synthesized ZnO nanocrystals have a hexagonal wurtzite structure and the maximum of UV-Vis spectrum was between 368-370 nm.

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49

Vasan, R., H. Salman, and M. O. Manasreh. "All inorganic quantum dot light emitting devices with solution processed metal oxide transport layers." MRS Advances 1, no. 4 (2016): 305–10. http://dx.doi.org/10.1557/adv.2016.129.

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ABSTRACTAll inorganic quantum dot light emitting devices with solution processed transport layers are investigated. The device consists of an anode, a hole transport layer, a quantum dot emissive layer, an electron transport layer and a cathode. Indium tin oxide coated glass slides are used as substrates with the indium tin oxide acting as the transparent anode electrode. The transport layers are both inorganic, which are relatively insensitive to moisture and other environmental factors as compared to their organic counterparts. Nickel oxide acts as the hole transport layer, while zinc oxide nanocrystals act as the electron transport layer. The nickel oxide hole transport layer is formed by annealing a spin coated layer of nickel hydroxide sol-gel. On top of the hole transport layer, CdSe/ZnS quantum dots synthesized by hot injection method is spin coated. Finally, zinc oxide nanocrystals, dispersed in methanol, are spin coated over the quantum dot emissive layer as the electron transport layer. The material characterization of different layers is performed by using absorbance, Raman scattering, XRD, and photoluminescence measurements. The completed device performance is evaluated by measuring the IV characteristics, electroluminescence and quantum efficiency measurements. The device turn on is around 4V with a maximum current density of ∼200 mA/cm2 at 9 V.

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Viswanatha, Ranjani, S. Chakraborty, S. Basu, and D. D. Sarma. "Blue-Emitting Copper-Doped Zinc Oxide Nanocrystals." Journal of Physical Chemistry B 110, no. 45 (November 2006): 22310–12. http://dx.doi.org/10.1021/jp065384f.

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