Journal articles: 'Nanostructured chalcogenide thermolectric materials'

1

Tanaka, Keiji. "Nanostructured chalcogenide glasses." Journal of Non-Crystalline Solids 326-327 (October 2003): 21–28. http://dx.doi.org/10.1016/s0022-3093(03)00371-5.

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Khan, Shamshad A., F. A. Al-Agel, A. S. Faidah, S. J. Yaghmour, and A. A. Al-Ghamdi. "Characterization of Se88Te12 nanostructured chalcogenide prepared by ball milling." Materials Letters 64, no. 12 (June 2010): 1391–93. http://dx.doi.org/10.1016/j.matlet.2010.03.035.

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Martín-Palma, R. J., M. C. Demirel, H. Wang, and C. G. Pantano. "Surface biofunctionalization of nanostructured GeSbSe chalcogenide glass thin films." Journal of Non-Crystalline Solids 355, no. 3 (February 2009): 208–12. http://dx.doi.org/10.1016/j.jnoncrysol.2008.10.013.

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Lukyanova, L. N., Yu A. Boikov, V. A. Danilov, O. A. Usov, M. P. Volkov, and V. A. Kutasov. "Thermoelectric and galvanomagnetic properties of bismuth chalcogenide nanostructured heteroepitaxial films." Semiconductor Science and Technology 30, no. 1 (December 5, 2014): 015011. http://dx.doi.org/10.1088/0268-1242/30/1/015011.

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Yang, Yuan, Kai Wang, Hai-Wei Liang, Guo-Qiang Liu, Mei Feng, Liang Xu, Jian-Wei Liu, Jin-Long Wang, and Shu-Hong Yu. "A new generation of alloyed/multimetal chalcogenide nanowires by chemical transformation." Science Advances 1, no. 10 (November 2015): e1500714. http://dx.doi.org/10.1126/sciadv.1500714.

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One-dimensional metal chalcogenide nanostructures are important candidates for many technological applications such as photovoltaic and thermoelectric devices. However, the design and synthesis of one-dimensional metal chalcogenide nanostructured materials with controllable components and properties remain a challenge. We report a general chemical transformation process for the synthesis of more than 45 kinds of one-dimensional alloyed/hybrid metal chalcogenide nanostructures inherited from mother template TexSey@Se core-shell nanowires with tunable compositions. As many as nine types of monometal chalcogenide alloy nanowires (including AgSeTe, HgSeTe, CuSeTe, BiSeTe, PbSeTe, CdSeTe, SbSeTe, NiSeTe, and CoSeTe) can be synthesized. Alloyed and hybrid nanowires integrated with two or more alloyed metal chalcogenide phases can also be prepared. The compositions of all of these metal chalcogenide nanowires are tunable within a wide range. This protocol provides a new general route for the controllable synthesis of a new generation of one-dimensional metal chalcogenide nanostructures.

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Kormilina, Tatiana K., Sergei A. Cherevkov, Anatoly V. Fedorov, and Alexander V. Baranov. "Cadmium Chalcogenide Nano-Heteroplatelets: Creating Advanced Nanostructured Materials by Shell Growth, Substitution, and Attachment." Small 13, no. 41 (September 12, 2017): 1702300. http://dx.doi.org/10.1002/smll.201702300.

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Luo, Wen, Jingke Ren, Wencong Feng, Xingbao Chen, Yinuo Yan, and Noura Zahir. "Engineering Nanostructured Antimony-Based Anode Materials for Sodium Ion Batteries." Coatings 11, no. 10 (October 11, 2021): 1233. http://dx.doi.org/10.3390/coatings11101233.

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Sodium-ion batteries (SIBs) are considered a potential alternative to lithium-ion batteries (LIBs) for energy storage due to their low cost and the large abundance of sodium resources. The search for new anode materials for SIBs has become a vital approach to satisfying the ever-growing demands for better performance with higher energy/power densities, improved safety and a longer cycle life. Recently, antimony (Sb) has been extensively researched as a promising candidate due to its high specific capacity through an alloying/dealloying process. In this review article, we will focus on different categories of the emerging Sb based anode materials with distinct sodium storage mechanisms including Sb, two-dimensional antimonene and antimony chalcogenide (Sb2S3 and Sb2Se3). For each part, we emphasize that the novel construction of an advanced nanostructured anode with unique structures could effectively improve sodium storage properties. We also highlight that sodium storage capability can be enhanced through designing advanced nanocomposite materials containing Sb based materials and other carbonaceous modification or metal supports. Moreover, the recent advances in operando/in-situ investigation of its sodium storage mechanism are also summarized. By providing such a systematic probe, we aim to stress the significance of novel nanostructures and advanced compositing that would contribute to enhanced sodium storage performance, thus making Sb based materials as promising anodes for next-generation high-performance SIBs.

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Shah, Kwok Wei, Su-Xi Wang, Yun Zheng, and Jianwei Xu. "Solution-Based Synthesis and Processing of Metal Chalcogenides for Thermoelectric Applications." Applied Sciences 9, no. 7 (April 11, 2019): 1511. http://dx.doi.org/10.3390/app9071511.

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Metal chalcogenide materials are current mainstream thermoelectric materials with high conversion efficiency. This review provides an overview of the scalable solution-based methods for controllable synthesis of various nanostructured and thin-film metal chalcogenides, as well as their properties for thermoelectric applications. Furthermore, the state-of-art ink-based processing method for fabrication of thermoelectric generators based on metal chalcogenides is briefly introduced. Finally, the perspective on this field with regard to material production and device development is also commented upon.

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Iaseniuc, O., M. Iovu, S. Rosoiu, M. Bardeanu, L. B. Enache, G. Mihai, O. Bordianu, et al. "Structural analysis of As-S-Sb-Te polycrystalline nanostructured semiconductors." Chalcogenide Letters 19, no. 11 (November 30, 2022): 841–46. http://dx.doi.org/10.15251/cl.2022.1911.841.

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The aim of this paper is to characterize the polycrystalline and vitreous phases in the As2S3-Sb2S3-Sb2Te3 systems using several techniques such as XRD, SEM, EDS, and micro-Raman spectroscopy. The As1.17S2.7Sb0.83Te0.40, As1.04S2.4Sb0.96Te0.60, As0.63S2.7Sb1.37Te0.30, and As0.56S2.4Sb1.44Te0.60 semiconductor chalcogenide bulk glasses were examined using Scanning Electron microscopy (SEM), Energy-Dispersive Spectroscopy (EDS), X-Ray diffraction (XRD) and micro-Raman analysis. The EDS quantitative and mapping analysis showed that for each investigated area, the identified elements were sulfur (S), arsenic (As), antimony (Sb) and tellurium (Te). These elements are present in constant atomic percentages on the entire sample, showing a good homogeneity of the samples. The study of samples by the above-mentioned methods showed the presence of crystalline phases and amorphous phases with the polycrystalline inclusions corresponding to the structural units AsS3, Sb2S3, and Sb2Те3.

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Mariappan, Vimal Kumar, Karthikeyan Krishnamoorthy, Parthiban Pazhamalai, Surjit Sahoo, Swapnil Shital Nardekar, and Sang-Jae Kim. "Nanostructured ternary metal chalcogenide-based binder-free electrodes for high energy density asymmetric supercapacitors." Nano Energy 57 (March 2019): 307–16. http://dx.doi.org/10.1016/j.nanoen.2018.12.031.

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Kumar, Gangadharan A. "Lanthanide Doped Complexes and Organometallic Clusters: Design Strategies and their Applications in Biology and Photonics." Current Physical Chemistry 9, no. 3 (November 26, 2019): 166–217. http://dx.doi.org/10.2174/1877946809666190919100324.

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In this review, we discuss the rational design of a new class of lanthanide-doped organometallic nanostructured materials called `molecular minerals`. Molecular minerals are nanostructured materials with a ceramic core made from chalcogenide groups and other heavy metals. Part of the central core atoms is replaced by suitable lanthanide atoms to impart fluorescent spectral properties. The ceramic core is surrounded by various types of organic networks thus making the structure partly ceramic and organic. The central core has superior optical properties and the surrounding organic ligand makes it easy to dissolve several kinds of organic solvents and fluoropolymers to make several kinds of active and passive photonic devices. This chapter starts with elaborate design strategies of lanthanidebased near-infrared emitting materials followed by the experimental results of selected near-infrared emitting lanthanide clusters. Finally, their potential applications in telecommunication, light-emitting diodes and medical imaging are discussed.

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Lee, Taemin, Jae Won Lee, Kyung Tae Park, Jin-Sang Kim, Chong Rae Park, and Heesuk Kim. "Nanostructured Inorganic Chalcogenide-Carbon Nanotube Yarn having a High Thermoelectric Power Factor at Low Temperature." ACS Nano 15, no. 8 (July 19, 2021): 13118–28. http://dx.doi.org/10.1021/acsnano.1c02508.

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13

Gainza, Javier, Federico Serrano-Sánchez, João E. F. S. Rodrigues, Oscar J. Dura, Brenda Fragoso, Mateus M. Ferrer, Norbert M. Nemes, José L. Martínez, María T. Fernández-Díaz, and José A. Alonso. "Structural Evolution from Neutron Powder Diffraction of Nanostructured SnTe Obtained by Arc Melting." Crystals 13, no. 1 (December 27, 2022): 49. http://dx.doi.org/10.3390/cryst13010049.

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Among chalcogenide thermoelectric materials, SnTe is an excellent candidate for intermediate temperature applications, in replacement of toxic PbTe. We have prepared pure polycrystalline SnTe by arc melting, and investigated the structural evolution by temperature-dependent neutron powder diffraction (NPD) from room temperature up to 973 K. In this temperature range, the sample is cubic (space group Fm-3m) and shows considerably larger displacement parameters for Te than for Sn. The structural analysis allowed the determination of the Debye model parameters and provided information on the Sn–Te chemical bonds. SEM images show a conspicuous nanostructuration in layers below 30 nm thick, which contributes to the reduction of the thermal conductivity down to 2.5 W/m·K at 800 K. The SPS treatment seems to reduce the number of Sn vacancies, thus diminishing the carrier density and increasing the Seebeck coefficient, which reaches 60 μV K−1 at 700 K, as well as the weighted mobility, almost doubled compared with that of the as-grown sample.

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Chen, Xin, and Helmut Baumgart. "Advances in Atomic Layer Deposition (ALD) Nanolaminate Synthesis of Thermoelectric Films in Porous Templates for Improved Seebeck Coefficient." Materials 13, no. 6 (March 12, 2020): 1283. http://dx.doi.org/10.3390/ma13061283.

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Thermoelectrics is a green renewable energy technology which can significantly contribute to power generation due to its potential in generating electricity out of waste heat. The main challenge for the development of thermoelectrics is its low conversion efficiency. One key strategy to improve conversion efficiency is reducing the thermal conductivity of thermoelectric materials. In this paper, the state-of-the-art progresses made in improving thermoelectric materials are reviewed and discussed, focusing on phononic engineering via applying porous templates and ALD deposited nanolaminates structure. The effect of nanolaminates structure and porous templates on Seebeck coefficient, electrical conductivity and thermal conductivity, and hence in figure of merit zT of different types of materials system, including PnCs, lead chalcogenide-based nanostructured films on planar and porous templates, ZnO-based superlattice, and hybrid organic-inorganic superlattices, will be reviewed and discussed.

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Mishra, P. K., V. Dave, R. Chandra, J. N. Prasad, and A. K. Choudhary. "Effect of processing parameter on structural, optical and electrical properties of photovoltaic chalcogenide nanostructured RF magnetron sputtered thin absorbing films." Materials Science in Semiconductor Processing 25 (September 2014): 307–19. http://dx.doi.org/10.1016/j.mssp.2014.01.021.

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Fudzi, Laimy Mohd, Zulkarnain Zainal, Hong Ngee Lim, Suhaidi B. Shafie, and Sook Keng Chang. "Influence of Applied Potential on Electrodeposited ZnSe/ZnO Nanostructured Films for Photoelectrochemical Cell." Solid State Phenomena 317 (May 2021): 463–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.317.463.

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Zinc oxide (ZnO) nanorods is widely investigated due to its high photoelectrochemical conversion performance. Further enhancement may be afforded by introducing a metal chalcogenide sensitization layer such as zinc selenide (ZnSe). In this study, ZnO nanorods were electrodeposited with ZnSe at potential range from -0.5 V to -0.9 V vs Ag/AgCl reference electrode. Structural, morphological and optical properties of ZnSe electrodeposited were investigated as a function applied potential by using X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), and ultraviolet-visible spectroscopy (UV-Vis). ZnSe electrodeposited for 15 minutes at -0.7 V showed crystallite size of 20.13 nm with the lowest band gap energy of 2.97 eV. The existence of ZnSe particles with the size of 41.8 nm were proven by FESEM images, after ZnSe particles were electrodeposited onto ZnO nanorods that have an average diameter of 62.6 nm and length of 1.6 µm. The photocurrent density generated by samples were measured in a three-electrodes cell incorporated with halogen lamp. The photocurrent generated increased between -0.5 V to -0.7 V before dropped at higher applied potential due to hydrogen evolution process which affected the thin film quality, ultimately affecting photoconversion performance. The highest photocurrent density of 0.2621 mAcm-2 was recorded for samples prepared at -0.7 V vs Ag/AgCl.

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Arulraj, Arunachalam, Praveen Kumar Murugesan, Rajkumar C, Alejandra Tello Zamorano, and Ramalinga Viswanathan Mangalaraja. "Nanoarchitectonics of Layered Metal Chalcogenides-Based Ternary Electrocatalyst for Water Splitting." Energies 16, no. 4 (February 7, 2023): 1669. http://dx.doi.org/10.3390/en16041669.

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The research on renewable energy is actively looking into electrocatalysts based on transition metal chalcogenides because nanostructured electrocatalysts support the higher intrinsic activity for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). A major technique for facilitating the conversion of renewable and sustainable energy is electrochemical water splitting. The aim of the review is to discuss the revelations made when trying to alter the internal and external nanoarchitectures of chalcogenides-based electrocatalysts to enhance their performance. To begin, a general explanation of the water-splitting reaction is given to clarify the key factors in determining the catalytic performance of nanostructured chalcogenides-based electrocatalysts. To delve into the many ways being employed to improve the HER’s electrocatalytic performance, the general fabrication processes utilized to generate the chalcogenides-based materials are described. Similarly, to enhance the OER performance of chalcogenides-based electrocatalysts, the applied complementary techniques and the strategies involved in designing the bifunctional water-splitting electrocatalysts (HER and OER) are explained. As a conclusive remark, the challenges and future perspectives of chalcogenide-based electrocatalysts in the context of water splitting are summarized.

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Zinchenko, V. F., I. R. Magunov, O. V. Mozkova, O. V. Sviridova, and T. Truglas. "Amorphous nano-structured coatings prepared from CVD-composites." Himia, Fizika ta Tehnologia Poverhni 12, no. 4 (December 30, 2021): 301–5. http://dx.doi.org/10.15407/hftp12.04.301.

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The main idea of the work is the development of a cheap and easy method for the manufacture of nanostructured systems based on the Chemical Vapor Deposition (CVD). Beginning with a new class of materials for interference optics in the infrared (IR) range of the spectrum, the evaporation of composites of systems germanium-metal chalcogenide (oxide), in particular, of the Ge-ZnS and Ge-Sb2Se3 systems was studied. They evaporate in vacuum congruently, and upon condensation on substrates form nano-structured thin-film coatings. In the first of these systems, the coating has an X-ray amorphous nature: the formation of a nano-dispersed composite in a Ge-ZnS film is confirmed by the absence of characteristic peaks of Ge and ZnS in X-ray diffraction patterns, but the formation of a characteristic halo takes place. At the same time, upon evaporation and condensation of a sample of the Ge-Sb2Se3 system, a glassy structure is formed; this is confirmed by high-resolution transmission electron microscopy (TEM), where no crystalline regions were found. The energy-dispersive X-ray (EDX) spectroscopy measurements of the coating (about 10 at.% of Ge, 40 at.% of Sb and Se, respectively) indicate a certain deviation from the stoichiometry compared to the initial sample of the system. This may indicate a slightly lower volatility of germanium selenides compared to antimony selenides. The EDX line scans along the cross-section of the coating exhibited strong fluctuations in the concentration of elements, and, consequently, the heterogeneity of the coating in terms of composition. Both coatings have high mechanical strength (group 0). At the same time, their optical properties differ significantly: the refractive indices are 3.00 and 3.66 for the Ge-ZnS and Ge-Sb2Se3 systems, respectively. It is believed that nano-structuring in the above systems is due to the high capability of germanium to amorphize upon condensation on a glass substrate.

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Kothari, R., S. Sen, and S. Rai. "Green synthesis of cobalt sulphide nanoparticles using synthesised cobalt (II) complex as a single route intermediate." Digest Journal of Nanomaterials and Biostructures 17, no. 2 (April 11, 2022): 403–20. http://dx.doi.org/10.15251/djnb.2022.172.403.

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Nanotechnology is increasing at a very fast rate due to its many possible applications in the biomedical, industry, pharmaceuticals, commercial and their areas. In this paper, we have reported the biosynthesis of chalcogenide nanostructured pharmacologically active cobalt sulphide nanoparticles (CoS) using 3-ethylidene oxopropanamide thiosemicarbazone Co(II) chloride complex. The synthesised cobalt (II) complex of schilf base ligand was reacted with freshly prepared aqueous leaves extract of Nyctanthes arbour tistis (harsingar leaves) for synthesis of CoS nanoparticles. The biofabrication of CoS nonoparticles is a very simple, efficient, fast, eco-friendly and inexpensive method. In this method we use the aqueous environment for green synthesis of CoS nanoparticles. The use of aqueous medium plays a very important role in reducing reaction time, reducing minimum possibilities of side reactions and proper execution in conversion of very good quality of nanoparticles in a very less time. The synthesized compounds like schiff base, Co (II) complex and CoS nanoparticles were analyzed through various structure, morphological, electronic, vibrational and pharmacological characterizations. Powdered xray diffraction studies confirm the formation of well defined equispaced crystalline nanoparticles. Transmission election microscopy and FESEM microscopy exhibit rod like structures of CoS nanoparticles with an average particle size of 56 nm. Sharp electronic absorption band at 280 nm indicates the synthesis of good quality CoS nanoparticles. The FT-IR spectral studies confirmed the presence of Co –S stretching, N-H bending and C=N stretching vibrations in Cobalt complex of Schiff base ligand. The thermal analysis of cobalt complex was performed to investigate the thermal stability of complex. The cobalt complex was stable up to 300°c. The effective results of all pharmacological activities like in vitro antimicrobial, antioxidant and anti inflammatory activities explained the presence of strong electron withdrawing and election releasing functional groups are present in schiff base ligand and its Co (II) complex The biofabrication of CoS nanoparticles via aqueous extract of fresh leaves of Nyctanthes arbour tristis in proper stoichiometric ratio is a good method for synthesizing highly efficient bioactive agents which can be consider as a good drug candidate for various biological applications in future for mankind.

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Fiechter, Sebastian, Fanxing Xi, Farabi Bozheyev, Fatwa Firdaus Abdi, Klaus Ellmer, Peter Bogdanoff, and Moritz Kölbach. "(Invited) On the Role of Electrocatalysts in the Process of Light-Driven Water Splitting." ECS Meeting Abstracts MA2018-01, no. 31 (April 13, 2018): 1854. http://dx.doi.org/10.1149/ma2018-01/31/1854.

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Due to its high energy density, hydrogen could play an important role to store chemical energy in GW scale. To produce it in large quantities, “artificial leaf”-type structures can be used to convert solar light into hydrogen by photoelectrochemical splitting of water. Since this process is most efficiently working under acidic conditions, acid-stable semiconducting materials are required to efficiently absorb sunlight and generate electron-hole pairs, the energy of which must be high enough to split water. In addition, cheap and abundant electrocatalysts are needed to minimize the overvoltages at cathode and anode. To replace costly platinum as well as RuO2 as efficient electrocatalysts for hydrogen and oxygen evolution, resp., alternative catalysts such as MoCo, (Mo,Co)Sx and (NH4)2Mo3S13 for pH <7 [1] and amorphous CoOxOHy, Mn2O3 for pH >7 [2] have been tested as hydrogen (HE) and oxygen evolution (OE) catalysts, respectively. The materials were first deposited on conductive glass by reactive magnetron sputtering, spin coating or electrochemical deposition techniques and investigated electrochemically. Highest activity as HE catalysts was found by depositing (NH4)2Mo3S13 on amorphous MoSx/FTO and alloys of MoCo, while porous layers of Mn2O3 deposited on FTO glass showed high activity as OE catalyst. Due to their remarkable behavior as dark catalysts (η(Mn2O3) = 340 mV and η(MoSx) = -170 mV at j = 10 mA/cm2), the materials were afterwards deposited on p- and n-type photosensitive transition metal chalcogenide layers to investigate their behavior under illumination. Surprisingly, (NH4)2Mo3S13, deposited on highly 001-textured polycrystalline p-type WSe2 film, behaved as a photosensitive hydrogen evolving electrode. Here the deposited catalyst film operates as an electrocatalyst for hydrogen evolution, but also as a semiconductor at the catalyst-semiconductor interface forming a buried heterojunction. References: [1] Jesse D. Benck, Sang Chul Lee, Kara D. Fong, Jakob Kibsgaard, Robert Sinclair, Thomas F. Jaramillo, Adv. Energy Mater. 4 (2014) 1400739-1400739. [2] Bogdanoff P., Stellmach D., Gabriel O., Stannowski B., Schlatmann R., van de Krol R., Fiechter S, Energy Technology 4, (2016) 230–241, DOI:number:10.1002/ente.201500317 [3] Stellmach D., Bogdanoff P., Gabriel O., Stannowski B., Schlatmann R., van de Krol R, Fiechter S., Nanostructured MoS2 particles as a novel hydrogen evolving catalyst integrated in a PV-hybrid electrolyzer, Materials and Processes for Energy: Communicating, Current Research and Technological Developments, Vol. 1 (A. Méndez-Vilas, Ed.), FORMATEX 2013, 880-886. [4] Moritz Kölbach, Sebastian Fiechter, Roel van de Krol, Peter Bogdanoff, Catalysis Today, 290 (2017) 2–9, https://doi.org/10.1016/j.cattod.2017.03.030 [5] Ramírez A., Hillebrand, P., Stellmach D., May M.M., Bogdanoff P., Fiechter S.,Phys Chem. C, 118 (2014) 14073-14081 and SI.

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Christian, Paul, and Paul O'Brien. "The General Synthesis of Nanostructured V/VI Semiconductors." MRS Proceedings 829 (2004). http://dx.doi.org/10.1557/proc-829-b3.8.

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ABSTRACTSemiconductors in the V/VI series have band gaps ranging from 2.2 eV for Sb2S3 to 0.21 eV for Bi2Te3 spanning the range seen from conventional mid to narrow band gap materials to semi-metals. These materials, especially those with narrower band gaps, demonstrate thermo-electric properties and are used in Peltier devices. There are examples in the literature of the synthesis of several of these materials in a nanostructured form, however the reactions often rely on highly toxic reagents, especially in the case of tellurium containing materials. Further more there are no reports of general routes applicable to all three chalcogenides.In this paper we describe a general method for the synthesis of chalcogenide V/VI nanomaterials by the reaction of acetate salts with the corresponding chalcogenide under reflux conditions in long chain alkyl amines, typically octylamine or dodecylamine. The effect of temperature and capping agent on the morphology of the final product are discussed and in particular the synthesis of Bi2S3 nanorods, Bi2Se3 and Bi2Te3 nanowafers and Sb2Se3 nanowires are described.

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Christian, Paul, and Paul O'Brien. "New Routes To Metal Chalcogenide Nanostructures." MRS Proceedings 829 (2004). http://dx.doi.org/10.1557/proc-829-b9.2.

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ABSTRACTThere is considerable current interest in the synthesis of metal chalcogenide nanostructured materials1 especially for the manufacture of so called 3rd generation solar cells. The facile, large scale, synthesis of such materials is critical to enabling such technology. The synthesis of these materials, especially those of cadmium, has been widely discussed in the literature. However, whilst routes involving pyrophoric materials give high quality particles and structures2, their inherent reactivity results in complications in handling. Although the use of acetates has already been shown to give good results,3 there are, in general, problems in the synthesis of tellurium containing materials.4This paper describes a new method providing a general synthesis of metal chalcogenide nanomaterials in a TOP/TOPO reaction system involving easy-to-handle reagents. Results for cadmium will for the basis of the discussion, which will include examples from a wider range of metals. The use of cadmium acetate in TOP and solutions of chalcogenides in TOP in the presence of suitable reducing agents provides an exceptionally reactive system. The system is flexible and may be applied to a wider range of chalcogenide based nanomaterials.

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Tripathi, Devdutt, Hardik Vyas, Sushil Kumar, Soumyashee Soumyaprakash Panda, and Ravi Hegde. "Recent developments in Chalcogenide phase change material-based nanophotonics." Nanotechnology, August 18, 2023. http://dx.doi.org/10.1088/1361-6528/acf1a7.

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Abstract There is now a deep interest in actively reconfigurable nanophotonics as they will enable the next generation of optical devices. Of the various alternatives being explored for reconfigurable nanophotonics, Chalcogenide phase change materials (PCMs) are considered highly promising owing to the nonvolatile nature of their phase change. Chalcogenide PCM nanophotonics can be broadly classified into integrated photonics (with guided wave light propagation) and Meta-optics (with free space light propagation). Despite some early comprehensive reviews, the pace of development in the last few years has shown the need for a topical review. Our comprehensive review covers recent progress on nanophotonic architectures, tuning mechanisms, and functionalities in tunable PCM Chalcogenides. In terms of integrated photonics, we identify novel PCM nanoantenna geometries, novel material utilization, the use of nanostructured waveguides, and sophisticated excitation pulsing schemes. On the meta-optics front, the breadth of functionalities has expanded, enabled by exploring design aspects for better performance. The review identifies immediate, and intermediate-term challenges and opportunities in (1) the development of novel chalcogenide PCM, (2) advance in tuning mechanism, and (3) formal inverse design methods, including machine learning augmented inverse design, and provides perspectives on these aspects. The topical review will interest researchers in further advancing this rapidly growing subfield of nanophotonics.

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"Nanostructured Metal Chalcogenide Networks As Carbon- and Binder-Free Cathode Materials for Li, Na, and Al-Ion Batteries." ECS Meeting Abstracts, 2018. http://dx.doi.org/10.1149/ma2018-01/3/329.

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Reddy, Ven B., Patrick L. Garrity, and Kevin L. Stokes. "Synthesis and Characterization of Bismuth Sulfide and Bismuth Telluride Nanorods and their Polyaniline Nanocomposites." MRS Proceedings 793 (2003). http://dx.doi.org/10.1557/proc-793-s8.36.

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We present here a simplified approach to the synthesis of bismuth sulfide and bismuth telluride nanorods and their polyaniline(PAN)-coated nanocomposites. The present method gives highly crystalline nanorods of bismuth sulfide of varying aspect ratio depending on the capping ligand employed, and involves reacting bismuth(III) trioleate with thioacetamide in phenyl ether at elevated temperatures in the presence of excess capping ligand. Bismuth telluride was obtained in high yields by reacting bismuth(III) trioleate with trioctylphosphine telluride at relatively low temperature. Oleic acid, sodium dodecylsulfonate and sodium dodecylbenzene sulfonate, used as capping ligands, did not have significant effect on the aspect ratio of Bi2Te3 nanorods. The nanostructured materials obtained this way were then coated with polyaniline (PAN) by heating a specific amount of material with half as much PAN in toluene close to reflux temperature for 6–8 h. It was necessary to keep the mixture thoroughly stirred and intermittently sonicated in order to ensure that the particles remain dispersed at all times. Bismuth chalcogenide nanoparticles as well as their composites were characterized using transmission electron microscopy and X-ray powder diffraction.

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Nazik, Ghulam, Muhammad Aadil, Sonia Zulfiqar, Warda Hassan, Abdur Rahman, Sobhy M. Ibrahim, Khalida Naseem, Tahir Ali Sheikh, and Muhammad Nadeem Akhtar. "Synthesis of doped metal sulfide nanoparticles and their graphene reinforced nanohybrid for Pb(II) detection." Zeitschrift für Physikalische Chemie, July 12, 2023. http://dx.doi.org/10.1515/zpch-2023-0252.

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Abstract This paper explores different techniques to combine and improve the electrochemical sensing activities of the transition metal chalcogenide. The transition metal chalcogenide was doped with a suitable dopant to tune the band structure. Surface-assisted nanotechnology was used to enrich the superficial properties of the doped material. Lastly, the nanostructured doped materials were physically mixed with the graphene nanoplates (GNPs) to improve the flow of charges and the stability of the electrochemistry. The most electrically conductive and common metal sulfides in nature were chosen and prepared using a cheap and easy wet-route method. Crystal structure, chemical functionality, texture, composition, and thermal stability of undoped, doped, and composite materials were determined using physicochemical techniques such as X-ray diffraction, FTIR, SEM, EDX, and TGA. N2-adsorption-desorption, current-voltage, and impedance studies show that the composite sample’s surface area, electrical conductivity, and charge transport properties are superior to those of the undoped and doped samples. Regarding electrochemical applications, the composite material supported a glassy carbon electrode (Co–Cu2S/Gr@GCE) with excellent Pb(II) ion sensing activity. Moreover, the sensitivity, detection, and quantification limits of the modified electrode for Pb(II) detection were computed to be 88.68 μAμMcm−2, 0.091 μM, and 0.30 μM, respectively. The key features developed in the metal sulfide for its enhancement of electrochemical sensing activity are a high surface area, good conductivity, and fast electron transport by adopting nanotechnology, metal doping, and composite formation methodologies. Based on the results of the experiments, we can say that using multiple inputs to integrate the feature we want is an excellent way to make electrochemical systems for the next generation.

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Journal articles on the topic 'Nanostructured chalcogenide thermolectric materials'

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