APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Mingyang Wang,Hu Li,Qian Xin,Mingyu Zhuang,Zhiyuan Wang,Yuzhuo Yuan,Xuemei Yin,Xiaoxiao Zheng,Jiawei Zhang,Aimin Song
Self-assembled monolayer (SAM) treatment of gate dielectrics plays a key role in the improvement of the electrical performance of organic thin-film transistors (TFTs) by reducing the interface traps. However, it is rarely explored in inorganic TFTs owing to possible irreversible damage to very thin SAMs during the sputtering and high-temperature annealing processes that are often used to deposit inorganic materials. Here, the feasibility of performance enhancement of inorganic p-type Zn-doped CuI TFTs is explored by a SAM treatment using 3-aminopropyltriethoxysilane (APTES) on the gate dielectric. Our result shows that the TFT performance is significantly enhanced with a 50% reduction in the interface trap density, a 326% increase in the hole mobility from 0.38 to 1.24 cm 2 V -1 s -1 and a 5-fold increase in the current on/off ratio from 2.6 × 10 6 to 1.1 × 10 7 . In addition, the bias stress stability of the TFTs after the treatment is dramatically enhanced by a factor of 10 due to the improved interface properties. The threshold voltage shift is reduced from +19.6 to +1.8 V after 3600 s positive bias stress. The simple yet effective interface treatment approach may have great potential in the fabrication of high-performance inorganic p-type electronic devices.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
MONATSHEFTE FUR CHEMIE
·
2015
·Vol. 147
·期 6
·1101-1105
·
IF 1.222
Tu Xingzhao,Xiong Jing,Li Zhijie,Zhou Lihong,Emmanouil Christina,Zeng Qingle
Abstract The valuable 2-( tert -butyldisulfanyl)heterocycles were effectively synthesized from 2-mercaptoheterocycles and tert -butanesulfinamide via unusual condensation. The reaction between 2-mercapto sulfur-containing heterocycles and tert -butanesulfinamide was performed under ligand-free CuI-catalyzed conditions. The synthetic processes described herein are simple, cost-efficient, and practical. Furthermore, a plausible mechanism is proposed for this transformation. Graphical abstract
研究领域:
有机化学
·
药物化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1454-1459
·
IF 3.086
Limei Zhou,Mengyun Yin,Xiaohui Jiang,Qiang Huang,Wencheng Lang
1,3-Diamino-graphene (NH2-G-NH2) materials were synthesized using a simple chemical method. The as-prepared materials were characterized using FT-IR, TG, XRD, XPS, and SEM measurements. The results revealed that a 1,3-diamino group was successfully grafted on graphene and could immobilize CuI by coordination interactions. The NH2-G-NH2 materials can be used as heterogeneous ligands for CuI-catalyzed C–N coupling reactions, and the desired products were obtained with good yields. The reaction system is much smoother at lower temperature compared with others previously reported. Additionally, the new method can easily realize the purification of products and recycling of catalysts.
研究领域:
材料科学
·
有机化学
·
催化化学
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DOI
高影响因子
OPTICAL MATERIALS
·
2017
·
IF 2.238
Shuangqiang Yue,Mu Gu,Xiaolin Liu,Juannan Zhang,Shiming Huang,Bo Liu,Chen Ni
γ-CuI single crystal was grown via evaporation method in ZnI 2 acetonitrile solvent. The ZnI 2 plays a unique role which can not only increase the solubility of CuI in acetonitrile but also introduce the Zn and I ions in the crystal. The γ-CuI crystal grown in ZnI 2 acetonitrile is regular and transparent. Its size reaches up to 18 × 11 × 2 mm 3 which is larger than that of the crystal grown in pure acetonitrile. In terms of the photoluminescence , the intensity of the emission at 411 nm of the crystal grown with ZnI 2 as a cosolute is much higher than that of the crystal grown without ZnI 2 , which implies that the crystallinity of the crystal can be improved by ZnI 2 doping. The X-ray excited luminescence of the crystal shows that the emission at 435 nm can be significantly enhanced and the emission near 680 nm can be suppressed by introducing Zn and I in the natural non-stoichiometry γ-CuI crystal. The nature of the phenomena is discussed. The decay time of the emission at 435 nm similar to that of the emission at 411 nm is faster than the detection limit of the instrument, i.e. less than 1 ns, and the average decay time of the emission near 680 nm is about 183 ns. The results can provide a useful guide to optimize the scintillation properties of γ-CuI single crystal.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 13
·期 2
·504-515
·
IF 6.177
Baiyu Liu,Xuefeng Hu,Junhan Yang,Chen Yang,Yao Huang
In this work, direct Z-scheme BiOBr/CuI heterojunctions are successfully synthesized using a simple solvothermal method for the first time. The photocatalytic activity of the BiOBr/CuI composite catalysts is evaluated by the degradation of phenol under visible light. The photocatalytic performance of all the composites is higher than that of the pure components. BiOBr/CuI-1 : 0.8 shows the best photocatalytic performance, which could remove 98.4% phenol in 150 minutes, almost 4.35 and 8.63 times as high as that of pure BiOBr and CuI, respectively. Assisted by XPS, the charge transfer of the composites is investigated. The good photocatalytic performance of the composites is attributed to the Z-scheme charge transfer between BiOBr and CuI. Moreover, the main active species in this system are proved by free radical quenching experiments and EPR, and a possible degradation mechanism is proposed. The degradation products of phenol are analyzed by HPLC-MS and the possible degradation paths are proposed.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2023
·Vol. 9
·期 5
·2201241
·
IF 6.2
Bingquan Peng,Quan Zhang,Yueyu Zhang,Yimin Zhao,Shengyue Hou,Yizhou Yang,Fangfang Dai,Ruobing Yi,Ruoyang Chen,Jun Wang,Lei Zhang,Liang Chen,Shengli Zhang,Haiping Fang
2D materials are promising nanomaterials for future applications due to their predominant quantum effects and unique properties in optics, electrics, magnetics, and mechanics. However, explorations in unique properties and potential applications of novel 2D materials have been hampered by synthesis and their stability under ambient conditions. Recently, in the graphene, 2D β-CuI is observed experimentally under ambient conditions. Here, it is shown that this 2D β-CuI@graphene possesses unexpected piezoresistive effect and room-temperature ferromagnetism. Moreover, this 2D β-CuI crystal is likely to be stable in a wide range of temperature, that is, below 900 K. Theoretical studies reveal that the unexpected piezoresistive effect is mainly attributable to the convergence of the electrons on Cu and I atoms to the Fermi level with increasing strain. There is a magnetic moment that is ≈0.97 μ B on the edge of β-CuI nanocrystal created by an iodine vacancy, which is considered the origin of such strong room-temperature ferromagnetism. Clearly, the 2D β-CuI@graphene provides a promising nanomaterial in the nano-sensors with low power consumption pressure and magnetic nano-devices with a size down to atomic scale. The discovery in the present work will evoke various new 2D nanomaterials with novel properties in nanotechnology, biotechnology, sensor materials, and technologies.
研究领域:
材料科学
·
纳米技术
·
物理学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 2
·705-713
·
IF 3.288
Samuthirarajan Senthilkumar,Wei Zhong,Mookan Natarajan,Chunxin Lu,Binyu Xu,Xiaoming Liu
An efficient and green protocol for aerobic oxidation of benzylic alcohols in ethanol using CuI–Y zeolite catalysts assisted by TEMPO (TEMPO = 2,2,6,6-tetramethyl-1-piperidine-N-oxyl) as the radical co-catalyst in the presence of atmospheric air under mild conditions is reported. The CuI–Y zeolite prepared via ion exchange between CuCl and HY zeolite was fully characterized by a variety of spectroscopic techniques including XRD, XPS, SEM, EDX and HRTEM. The incorporation of Cu(I) into the 3D-framework of the zeolite rendered the catalyst with good durability. The results of repetitive runs revealed that in the first three runs, there was hardly a decline in activity and a more substantial decrease in yield was observed afterwards, while the selectivity remained almost unchanged. The loss in activity was attributed to both the formation of CuO and the bleaching of copper into the liquid phase during the catalysis, of which the formation of CuO was believed to be the major contributor since the bleaching loss for each run was negligible (<2%). In this catalytic system, except TEMPO, no other additives were needed, either a base or a ligand, which was essential in some reported catalytic systems for the oxidation of alcohols. The aerobic oxidation proceeded under mild conditions (60 °C, and 18 hours) to quantitatively and selectively convert a wide range of benzylic alcohols to corresponding aldehydes, which shows great potential in developing green and environmentally benign catalysts for aerobic oxidation of alcohols. The system demonstrated excellent tolerance against electron-withdrawing groups on the phenyl ring of the alcohols and showed sensitivity to steric hindrance of the substrates, which is due to the confinement of the pores of the zeolite in which the oxidation occurred. Based on the mechanism reported in the literature for homogenous oxidation, a mechanism was analogously proposed for the aerobic oxidation of benzylic alcohols catalysed by this Cu(I)-containing zeolite catalyst.
研究领域:
化学
·
催化
·
绿色化学
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材料科学
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·4437-4443
·
IF 9.9
Zhong Junsen,Huang Bingkun,Yang Kunjie,Ma Zuju,Du Lingyu,Luo Ning,Tang Fengjiao,Hou Chuanxin,Jiang Fuyi,Kang Litao
The electrochromic (EC) mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution, which are plagued by ion trapping and dendrite growth, respectively. In this paper, a novel conversion-type electrochromic mechanism is proposed, by making good use of the CuI/Cu redox couple. This CuI-based electrochromic system shows a neutral color switching from transparent and dim grey. By simply increasing the bleaching voltage, \({{\rm{I}}_3}^ - /{{\rm{I}}^ - }\) redox couple can be further activated. The generated \({{\rm{I}}_3}^ - \) will readily react with Cu, effectively improving the conversion reversibility and thereby rejuvenating the degraded electrochromic performance. Thanks to the well-designed electrode and the self-healing ability, this conversion electrochromic system achieves rapid response times ( t coloring : 23 s, t bleaching : 6 s), decant optical modulation amplitude (26.4%), high coloration efficiency (86.15 cm 2 ·C −1 ), admirable cyclic durability (without performance degradation after 480 cycles) and excellent optical memory ability (transmittance variation < 1% after 10 h open-circuit storage). The establishment of this conversion-type electrochromism may inspire the exploration of novel electrochromic materials and devices.
研究领域:
材料科学
·
电化学
·
纳米技术
·
智能材料
·
能量存储与转换
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 45
·16795-16802
·
IF 4.39
Su-Yun Zhang,Fangchao Long,Chenxu Kang,Zhengyuan Jin,Ailun Zhao,Huawei Liang,Shuangchen Ruan,Yu-Jia Zeng
γ-phase copper(I) iodide (abbreviated to CuI hereafter) with different morphologies is realized through a one-step redox process from I-containing ionic liquid (IL) or poly(ionic liquid)s (PILs) precursors at room temperature. The phase composition, morphology, and electronic states of the synthesized CuI samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The resulting CuI products exhibit three different types of morphologies, namely nanocrystals, with an average size of 0.8 ± 0.2 μm, nanoplates, with a thickness of 35.8 ± 0.9 nm, and nanoflowers, with petals with a thickness of 12.2 ± 0.8 nm. Moreover, the as-synthesized CuI samples exhibit gradually diminishing bandgaps and improved photocatalysis performance for the photodegradation of rhodamine B (RhB) under visible light irradiation as the thickness decreases. XPS measurements confirm that IL/PILs coupled to the CuI surface, resulting in a further charge transfer between Cu and I. These results conclusively prove that IL/PILs serve as both the reducing agents and assemble as orientation templates in the formation of the CuI nanostructures, and also successfully mediate the functional properties of the samples by changing the surface electronic structures.
研究领域:
材料科学
·
化学
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2026
·
IF 14.1
Yuzhao Ouyang,Ke Qu,Haonan Wang,Jianquan Liu,Wei Li,Zhuoran Ji,Jialin Yang,Qiuxiang Zhu,Zhenzhong Yang,Xiaodong Tang,Hui Peng,Bobo Tian,Chungang Duan,Chang Yang
The realization of invisible neuromorphic electronics hinges on transparent memories that reconcile high optical transparency with stable analog tunability, which is a challenge unmet by conventional filamentary devices. Here, we introduce an alloyed Cu 1- x Ag x I halide transparent semiconductor with dual ionic-electronic character, which enables a filament-free switching platform. Ag + incorporation induces lattice distortions within the γ-phase CuI matrix, expanding interstitial channels and lowering the migration barrier without phase transition. This activates room-temperature ion migration to dynamically modulate the p-type hole conductance. Asymmetric electrodes induce spatially distributed ion migration and interfacial modulation, avoiding localized metallic percolation. In situ TEM and EDS mapping confirm reversible Cu + /Ag + redistribution without continuous conductive pathways. Pt/Cu 1- x Ag x I/Ag devices exhibit > 80% transparency, low-voltage readout, and > 2-year retention. They emulate synaptic plasticity and achieve high-accuracy handwritten digit recognition. Our findings establish a design strategy for transparent memristors, enabling reliable neuromorphic hardware via ionically mediated electronic transport.
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 17
·10707-10714
·
IF 5.044
Li Hongbing,Zong Yudong,Li Xia,Ding Qijun,Jiang Yifei,Han Wenjia
Cellulose is the most widely distributed polymer material in nature and is considered a low-cost, green and recyclable material. Because of its excellent mechanical, optical and thermal properties, people are interested in the research of cellulose-based flexible electronic devices. Among them, bacterial cellulose has a low fiber bundle size during the production process and is easier to process to obtain nanofibers. Hereby, in this study the composite thermoelectric film was prepared from bacterial cellulose nanofibers (BCNFs) and copper iodide (CuI), a low-toxicity thermoelectric material. Hydrophobic properties of the composite thermoelectric film were obtained by immersing in AKD emulsion. It showed good mechanical flexibility and high biocompatibility. CuI particles can be recovered successfully through cellulase simulating the degradation process, and the closed-loop of preparation-recycling can be completed. In addition, it achieves an open circuit voltage of 11.3 mV and output power of 2.76 nW at a temperature difference of 70 K. This work not only confirms the environmental protection of CuI/BCNF thermoelectric film, but also provides a strategy for the recycling of thermoelectric equipment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 6
·期 13
·1900669
·
IF 4.713
Siyuan Li,Yong Zhang,Wei Yang,Xiaosheng Fang
Herein, Sn 4+ -doped copper (I) iodide (CuI) is prepared via a facile, cost-efficient solution process, and the properties of Sn 4+ -doped CuI, including morphology, crystalline phase, as well as optical and electrical properties, are investigated by varying the Sn 4+ concentration. And by constructing transparent Sn 4+ -CuI/ZnO hybrid UV photodetectors, the potential of Sn 4+ -CuI as a p-type material for high-performance photodetection is investigated. It is found that Sn 4+ doping has great effect on the morphology as the formation of Sn 4+ -CuI thin sheets is observed, and the resistivity of Sn 4+ -CuI could be tuned by controlling Sn 4+ addition. The Sn 4+ -CuI/ZnO hybrid photodetectors exhibit obviously enhanced photodetecting performance outperforming ZnO film and CuI/ZnO photodetectors by the same preparation method, including significantly improved on/off ratio, spectral responsivity, and shortened responsive time. The enhanced performance of Sn 4+ -CuI/ZnO hybrid photodetectors mainly arises from the formation of type-II p-Sn 4+ -CuI/n-ZnO heterojunctions, and the better interface contact leads to higher carrier separation efficiency due to the existence of Sn 4+ -CuI thin sheets. And the improved performance is also related to the optimized resistivity of Sn 4+ -CuI. This study sheds light on the potential of doped CuI toward transparent, high-performance photodetectors in the future.
✓ 已验证
DOI
高影响因子
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