CHEMISTRY-A EUROPEAN JOURNAL
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2012
·Vol. 19
·期 5
·1732-1739
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IF 5.925
Zhipeng Huang,Lei Pan,Peng Zhong,Maoying Li,Feng Tian,Chi Zhang
Graphical Bird on a quantum wire : Monodisperse Ag 2 S (or Ag 2 Se) ZnSe quantum wires can be synthesized at 120 °C with the assistance of Ag 2 S. These quantum wires are uniform in structure and morphology and have an aspect ratio of larger than 100. This method can be also used to fabricate CdSe quantum rods. A facile method for the low-cost and large-scale production of ultralong Ag 2 S (or Ag 2 Se) ZnSe quantum wires has been developed. ZnSe quantum wires (diameter≈4 nm) with high uniformity in their crystal structure and diameter can be synthesized by using a catalyst-assisted growth approach with Ag 2 S nanoparticles as a catalyst. The influence of the growth temperature, time, and type of catalytic particle on the morphology of the ZnSe quantum wires was systematically explored. Besides Ag 2 S, Ag 2 Se nanoparticles can also be adopted as the catalyst for the growth of ZnSe wires. This method can also be applied to the fabrication of uniform CdSe nanorods. This method is convenient for the controllable fabrication of metal selenides and is of importance for exploring fundamental nanoscale semiconductor physics, as well as for affording technological devices with optimized characteristics.
研究领域:
材料科学
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纳米技术
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半导体物理
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
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2021
·
IF 4.126
Mengling Liao,Beibei Shan,Ming Li
All-inorganic CsPbBr3 perovskites have emerged as promising luminescent materials for light-emitting devices owing to their unprecedented photoluminescence (PL) properties. The fundamental understanding of their photophysical properties offers new opportunities to develop high-performance devices. However, the investigation of optical properties of strongly quantum-confined CsPbBr3 perovskites of different morphologies is lacking. Herein, we report the PL properties of strongly quantum-confined CsPbBr3 perovskites with varying dimensionalities, specifically zero-dimensional quantum dots (0D-QDs), one-dimensional quantum wires (1D-QWs), and two-dimensional quantum platelets (2D-QPLs). Results reveal that the PL efficiency displays an overall increase for 0D-QDs and 1D-QWs but a negligible change for 2D-QPLs against the excitation wavelength, all with the observation of multiple local minima. A combined analysis of the excitation wavelength dependence of the PL efficiency, dimensionality dependence of excitonic transition, and time-resolved PL decays implies the presence of two different types of trap states—a continuum of electron trap states and discrete localized trap states. We conclude that both trap states are equally important in both 0D-QDs and 1D-QWs, while discrete localized trap states are dominant in 2D-QPLs. In all these quantum structures, the two trap states do not affect the intrinsic exciton relaxation but could interact with energetically excited electrons beyond the conduction band minimum, thereby decreasing the PL efficiency. Our study presents a fundamental understanding of the PL properties of quantum-confined CsPbBr3 perovskites and may guide the development of the corresponding light-emitting devices.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jiaoyi Shi,Limin Liu,Fangjie Xu,Yi Zhang
Semiconductor nanowires are the ideal building blocks to construct various thin-film electronic and optoelectronic devices, the performance of which is largely determined by their ensemble geometry and surface chemistry in addition to the chemical composition. Here, we report the large-scale and oriented assembly of CdSe nanowires on the basis of a light-induced assembly approach under an external electric field. To further increase the electrical conductivity of nanowire films, the original surface-capping organic ligands are exchanged with small ionic species through a solid-state ligand-exchange process. The resulting surface-modified CdSe nanowire films exhibit markedly enhanced photoresponse properties including high on/off ratios and fast response. This work establishes a simple yet scalable method to fabricate aligned nanowire films with a desired surface chemistry, which can be broadly used in various electronic and optoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
半导体物理
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yan Wang,Chong Li,Xuejin Li,Jinghan Zhang,Xinghong Chen,Xueming Hong,Jingting Luo,Zhenglong Sun,Fujian Ren,Ran Tao,Yuzhi Chen
The detection of toxic ammonia (NH 3 ) gas across multiple channels at room temperature, especially under complex conditions, consistently presents a significant challenge. In this paper, a plasmonic Pt-doped SnO 2 enhanced quantum wires NH 3 gas sensor is constructed on a 125-µm communication fiber with easy networking. To enhance usability in confined areas, the sensor features a compact plug-in fiber probe design. The plasmonic Pt-doped SnO 2 enhanced quantum wires coating boosts the interaction between NH 3 gas molecules and oxygen adsorbed on the wires' surface, modulating the plasmonic optic signal. We present and compare two optical modulation methods-wavelength and intensity-for our NH 3 gas probe. Our sensor achieves an impressive intensity sensitivity of -10.45 a.u./ppm at room temperature with a rapid response time of 3.8 s. Furthermore, intensity modulation offers an exceptionally low detection limit of 287 ppb, with minimal susceptibility to temperature and humidity variations. The proposed fiber NH 3 gas probe exhibits commendable specificity, repeatability, stability, and cost-effectiveness, along with flexibility in light source and receiver choices, making it ideal for NH 3 gas detection applications.
研究领域:
材料科学
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光学工程
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 22
·6033-6037
·
IF 5.976
Yu Peng,Yunpeng Yao,Lina Li,Zhenyue Wu,Sasa Wang,Junhua Luo
Recently, white-light emissions arising from self-trapped excitons in a distorted lattice have attracted significant attention in organic–inorganic hybrid perovskites. Although exciton self-trapping is reported to be easier in lower dimensional structures, one-dimensional organic–inorganic perovskites with white-light emission are rare. Herein, we report a single-component white-light emissive hybrid perovskite, C5H14N2PbCl4·H2O (1), which adopts a distinct quantum-wire structure formed by edge-shared highly distorted lead chloride octahedra. Notably, 1 shows a color rendering index as high as 93.9, which almost falls around the highest value for hybrid perovskite white-light emissive materials. In addition, 1 is nonlinear and has circularly polarized optical activity induced by the incorporation of pure enantiomeric organic cations. The combination of white-light emission and chirality may pave the way for the design of new white-light emission organic–inorganic perovskites for multifunctional applications.
研究领域:
材料科学
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光学
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晶体化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 24
·4464
·
IF 5.719
Baohui Zhang,Chong Li,Min Li,Chen Fu,Ran Tao,Honglang Li,Jingting Luo
Nitrogen dioxide is one origin of air pollution from fossil fuels with the potential to cause great harm to human health in low concentrations. Therefore, low-cost, low-power-consumption sensors for low-concentration NO2detection are essential. Herein, heterojunction by SnO2quantum wires, a traditional metal oxide NO2sensing material, and Ti3C2TxMXene, a novel type of 2D layered material, was synthesized using a simple solvothermal method for enhancing gas-sensing performance and reducing operating temperature. The operating temperature was reduced to 80 °C, with a best performance of 27.8 and a fast response and recovery time (11 s and 23 s, respectively). The SnO2and Ti3C2TxMXene composite exhibits high speed and low detection limit due to the construction of the heterojunction with high conductive Ti3C2TxMXene. The selectivity and stability of gas sensors are carried out. This could enable the realization of fast response, high-sensitivity, and selective NO2sensing under low operating temperatures.Keywords:Ti3C2TxMXene;SnO2;gas sensor;NO2;nanocomposite
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2022
·Vol. 22
·期 8
·7590-7598
·
IF 4.325
Ruiqin Gu,Yunong Zhao,Huibing Fu,Jianxian Yang,Zhixiang Hu,Long Li,Hua-Yao Li,Qing Huang,Bingbing Chen,Huan Liu
Chemically modified electrode (CME) has shown significant potential for achieving on-site and real-time detection of heavy metal ions. In this paper, a nanocrystalline SnO2-modified Au electrode as an electrochemical sensor for ultrasensitive mercury ion (Hg2+) detection was proposed and demonstrated. The modification method is simply employing the spin-coating process of colloidal SnO2 quantum wires at room temperature in ambient air without further heat treatment. Nanocrystalline SnO2 possesses a large surface area with abundant dangling bonds, through which the enrichment and dissolution of ions were enhanced and converted to significant current signal under anodic stripping voltammetry (ASV) scanning mode. According to the results of DFT analysis, SnO2 has a greater adsorption energy for Hg2+ than that of Au, which further improves its sensitivity. The nanocrystalline SnO2-modified electrode exhibits sensitive response to Hg2+ in the range of 10−9 M~10−4 M, with the limit-of-detection (LOD) of 0.036 nM. The selectivity was ascribed to the higher adsorption energy of Hg on SnO2 surface compared with other metals in this study. The electrode modification strategy based on colloidal semiconductor nanocrystals may promote the design of sensitive sensors for rapid and reliable ion detection.
研究领域:
分析化学
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环境监测
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电化学
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传感器技术
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纳米材料
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重金属检测
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Baoting Tan,Jia Yan,Yiwen You,Xujie Cao,Zhilong Song
Environmental residues of fluoroquinolone antibiotics have become a major threat to both ecosystems and human health, necessitating the development of highly efficient adsorbents with molecular recognition capabilities. This study presents a novel class of WO 3− x quantum wire (QWs) designed to address the limitations of traditional adsorbents, particularly poor selectivity and difficult regeneration processes. We successfully fabricated sub-2 nm ultrathin WO 3− x QWs with enriched with W 5 + /W 6+ active sites and surface functional groups through a precise solvothermal method. The resulting WO 3−x QWs demonstrated exceptional selectivity for fluoroquinolone antibiotics, achieving > 90 % removal efficiency for ciprofloxacin, norfloxacin, and ofloxacin, in contrast to much lower removal rates for common dyes like rhodamine B and methylene blue, as well as other antibiotics like tetracycline hydrochloride. Comprehensive characterizations, including thermodynamic and kinetic models, revealed three key molecular recognition mechanisms driving this high performance. Furthermore, when incorporated into a composite membrane, the QWs demonstrated outstanding performance in continuous filtration, showing high removal efficiency, rapid adsorption, and long-term stability. This study not only provides a new class of efficient adsorbent materials for antibiotic treatment, but also offers fresh insights into the development of functional materials with molecular recognition properties for broader applications.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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药物污染
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2023
·
IF 5
Qing Huang,RuiQin Gu,Yunong Zhao,Huibing Fu,Huan Liu
Electrochemical sensors that incorporate immunoassay principles have the ability to monitor dynamic processes of antigen–antibody interactions in real time. In this study, a gold electrode was modified with tin dioxide colloidal quantum wire (SnO 2 QWs) and then coated with the leucine/arginine subtype microcystin (MC-LR) antibody. The active site of SnO 2 QWs that was not bound by MC-LR antibody was then passivated with bovine serum protein (BSA). When the MC-LR antigen binds specifically to the antibodies on the electrode's surface, it triggers electrochemical reactions and generates electrical signals at specific voltage conditions. The SnO 2 QW exhibits excellent electron transport ability, and its ability to form a loose and porous microstructure on the gold electrode surface, which is conducive to the receptor function of the biosensor. The results show a high affinity between the MC-LR antigen and antibody, ranging from 1 pg/mL to 10 ng/mL of MC-LR antigen concentration. The kinetic characteristics of the immune reaction between MC-LR antigen and antibody were elucidated, obtaining a binding constant of 1.399 × 10 11 M −1 and a dissociation constant of 7.147 pM, demonstrating the potential of electrochemical biosensing technology in biomolecular interactions.
研究领域:
分析化学
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生物传感器
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环境科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）