RSC Advances
·
2014
·Vol. 4
·期 69
·36875-36881
·
IF 3.708
Fengcong Gong,Shouqin Tian,Baoshun Liu,Dehua Xiong,Xiujian Zhao
Distinct from the popular opinion that only the zinc-blende CuInS2 phase could be prepared in the presence of oleic acid (OA), CuInS2 nanocrystals with different phase structures and shapes were synthesized by a facile heat-up method through simply adjusting the OA dosage. Zinc-blende CuInS2 quantum dots (QDs) with a triangular pyramidal shape were obtained at a low dosage of OA (<1 mL). With an increase in the OA dosage (∼1.5 mL), wurtzite CuInS2 hexagonal nanoplates were formed accompanied by zinc-blende CuInS2 QDs. A higher OA dosage (2–3 mL) led to the production of wurtzite CuInS2 hexagonal nanoplates. The formation of the CuInS2 nanocrystals with tunable structures was mainly attributed to the role of OA dosage in the formation and transformation of a CuIn(SR)x intermediate. A high OA dosage could facilitate the formation and crystallization of the intermediate, giving a metastable wurtzite CuInS2 structure that could be gradually converted into a stable zinc-blende CuInS2 QDs as the reaction proceeded. However, a low OA dosage would lead to low crystallinity of the intermediate, and thus the intermediate was transformed into a stable zinc-blende CuInS2 phase easily. Therefore, our work could provide guidance for the controllable synthesis of other multi-component chalcogenide nanocrystals.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 19
·9251-9259
·
IF 4.197
Aiwei Tang,Zunlan Hu,Zhe Yin,Haihang Ye,Chunhe Yang,Feng Teng
A simple one-pot colloidal method has been described to engineer ternary CuInS2 nanocrystals with different crystal phases and morphologies, in which dodecanethiol is chosen as the sulfur source and the capping ligands. By a careful choice of the anions in the metal precursors and manipulation of the reaction conditions including the reactant molar ratios and the reaction temperature, CuInS2 nanocrystals with chalcopyrite, zincblende and wurtzite phases have been successfully synthesized. The type of anion in the metal precursors has been found to be essential for determining the crystal phase and morphology of the as-obtained CuInS2 nanocrystals. In particular, the presence of Cl− ions plays an important role in the formation of CuInS2 nanoplates with a wurtzite–zincblende polytypism structure. In addition, the molar ratios of Cu to In precursors have a significant effect on the crystal phase and morphology, and the intermediate Cu2S–CuInS2 heteronanostructures are formed which are critical for the anisotropic growth of CuInS2 nanocrystals. Furthermore, the optical absorption results of the as-obtained CuInS2 nanocrystals exhibit a strong dependence on the crystal phase and size.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 6
·1085
·
IF 5.3
Qingchao Zhou,Zhongyi Shang
The commercial application of colloidal semiconductor nanocrystals has been realized owing to the development of composite film technology. Here, we demonstrated the fabrication of green and red emissive CuInS2nanocrystals embedded polymer composite films of equal thickness by using a precise solution casting method. The impacts of polymer molecular weight on the dispersibility of CuInS2nanocrystals were then systematically studied through evaluating the decrease in transmittance and red shift of emission wavelength. The composite films made from PMMA of small molecular weights exhibited higher transmittance. Applications of these green and red emissive composite films as color converters in remote-type light-emitting devices were further demonstrated.Keywords:CuInS2nanocrystals;PMMA;composite films;molecule weights;white LEDs
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Hongying Liu,Chunchuan Gu,Weiwei Xiong,Mingzhen Zhang
In this paper, CuInS 2 nanocrystals are prepared by microwave-assisted method and found to possess intrinsic peroxidase-like activity for the first time. It could catalytically oxidize 3,3′,5,5′-tetramethylbenzidine by H 2 O 2 to produce a color changing reaction, which is the principle for sensing of H 2 O 2 level. Furthermore, the catalysis mechanism was studied. It was found to follow Michaelis–Menten kinetics and peroxidase activity varied with respect to electrostatic affinity between nanoparticles and substrates, evidenced by differences in determined kinetic parameters. In regard to this, a biosensor was developed for the detection of H 2 O 2 . The results indicated that a good linear relationship was obtained from 0.1 to 20 μM of H 2 O 2 . The detection limit is calculated to be 0.03 μM, which is better than previous reports utilizing various methods. Taking into account the advantages of ultra-small size, good stability, and high biocompatibility, CuInS 2 nanocrystals are expected to have potential applications in biotechnology and clinical diagnosis as enzymatic mimics.
研究领域:
生物技术
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临床诊断
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 7
·4533-4536
·
IF 1.134
Deng Chong,Fu Bowen,Li Lili,Wang Yanlai,Yang Lin
The hot-injection method was used for the synthesis of ternary metal chalcogenide nanocrystals (NCs) CuInS2 (CIS); this was achieved by using the metal precursors (copper iodide and indium acetate) and four different types of sulfur precursor solutions. It was discovered
that CIS NCs synthesized with different sulfur precursor solutions exhibited the chalcopyrite structure with similar particle sizes of ~4.2 nm. As a comparison, CIS NCs synthesized using ODE-S precursor displayed an enhanced luminescence intensity and a long PL decay lifetime, which could
be considered as an evidence of improved interior crystallinity.
研究领域:
材料科学
·
纳米技术
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）