ACS Photonics
·
2024
·
IF 6.5
Longlong Jiang,Banghu Wang,Fan Ni,Wentao Xu,Xiaohong Wang,Lei Zheng,Longzhen Qiu
Artificial photoelectric synaptic devices are promising candidates for simulating the perception, processing, and memory functions of biological visual information. Dielectric layer interface modification is a simple and effective strategy for the fabrication of light stimulated synaptic devices. In this work, the dielectric layer interface was tuned by varying the terminating groups of self-assembled monolayers (SAMs), whereas the polymer polydiketopyrrolopyrrole-selenophene with hybridized siloxane side chains (PTDPPSe-4Si) was used as the active layer for fabrication of the transistor devices. Enhanced optoelectronic performance was observed in the fabricated devices that were treated by pentafluorophenylpropyltrichlorosilane (FPPTS) due to the presence of more interfacial charge traps. The photosensitivity and detection rate were found to be up to 105 and 1011 Jones, respectively. Furthermore, it was also shown experimentally that the interfacial charge trapping effect was caused by a combined effect of electron trapping by the SAMs-modified interface and traps present within the active layer. Biological synaptic plasticity was successfully simulated using FPPTS/PTDPPSe-4Si-based devices. The memory and forgetting processes of biomimetic visual information were also simulated. Finally, conventional neural networks were used for image recognition, achieving a recognition rate of over 95%.
研究领域:
材料科学
·
仿生学
·
电子工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2017
·
IF 0.795
Fu-Xing XU,Qian-Kun DANG,Hang-Yu DING,Zheng-Xu HUANG,Yuan-Yuan WANG,Zhen ZHOU,Chuan-Fan DING
Ion trap performances were investigated based on digital ion trap technology with different collision gases and their pressures. Collision gases of helium ( M = 4 amu), nitrogen ( M = 28 amu) and argon ( M = 40 amu) with various pressures were adopted in ion excitation and dissociation stages for comparing the ion trap performances, including mass resolution, signal intensity, analysis ability of tandem mass spectrometric and low-mass cut off (LMCO) effect. The results indicated that when argon was used, the kinetic energy could be efficiently transferred and the LMCO effect was improved with higher ion capture and dissociation efficiencies except lower mass resolution. Higher mass resolution was realized with helium as collision gas. Furthermore, at the same gas pressure, heavier gas was beneficial to abundant fragment ions and structural information of precursor ion.
研究领域:
分析化学
·
质谱技术
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DOI
高影响因子
Solar RRL
·
2018
·Vol. 2
·期 10
·1800188
·
IF 0
Jifeng Yuan,Linxing Zhang,Chenghao Bi,Mengru Wang,Jianjun Tian
Cesium halide perovskite CsPbX 3 has emerged to be a promising candidate for photovoltaic materials due to their componential and thermal stability. During the fabrication of CsPbX 3 films, rich halide ions could cause deep trap states on the surface of the perovskite film, leading to much charge recombination. Herein, Pb 2+ solution post-processing strategy is introduced to passivate the deep trap states of CsPbI 2 Br films. The dissociative Pb 2+ in the solution effectively combines with the excess halide ions on the perovskite surface to reduce the deep trap states of Pb vacancy ( V Pb ) and I interstitial ( I i ). As a result, the average photoluminescence lifetimes τ ave of the perovskite film prolonged nearly double after passivation. The trap density of perovskite is effectively decreased from 8 × 10 16 to 6.64 × 10 16 cm −3 . The CsPb 2 Br solar cell shows an open-circuit-voltage as high as 1.29 V and power conversion efficiency of 12.34% with small hysteresis. The postprocessing method would provide an avenue to improve further the efficiency of inorganic perovskite solar cells via reducing surface traps.
研究领域:
材料科学
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光伏学
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半导体器件
·
表面化学
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DOI
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 22
·2000594
·
IF 16.836
Yong Xia,Wei Chen,Peng Zhang,Sisi Liu,Kang Wang,Xiaokun Yang,Haodong Tang,Linyuan Lian,Jungang He,Xinxing Liu,Guijie Liang,Manlin Tan,Liang Gao,Huan Liu,Haisheng Song,Daoli Zhang,Jianbo Gao,Kai Wang,Xinzheng Lan,Xiuwen Zhang,Peter Müller-Buschbaum,Jiang Tang,Jianbing Zhang
Trap states in colloidal quantum dot (QD) solids significantly affect the performance of QD solar cells, because they limit the open-circuit voltage and short circuit current. The {100} facets of PbS QDs are important origins of trap states due to their weak or missing passivation. However, previous investigations focused on synthesis, ligand exchange, or passivation approaches and ignored the control of {100} facets for a given dot size. Herein, trap states are suppressed from the source via facet control of PbS QDs. The {100} facets of ≈3 nm PbS QDs are minimized by tuning the balance between the growth kinetics and thermodynamics in the synthesis. The PbS QDs synthesized at a relatively low temperature with a high oversaturation follow a kinetics-dominated growth, producing nearly octahedral nanoparticles terminated mostly by {111} facets. In contrast, the PbS QDs synthesized at a relatively high temperature follow a thermodynamics-dominated growth. Thus, a spherical shape is preferred, producing truncated octahedral nanoparticles with more {100} facets. Compared to PbS QDs from thermodynamics-dominated growth, the PbS QDs with less {100} facets show fewer trap states in the QD solids, leading to a better photovoltaic device performance with a power conversion efficiency of 11.5%.
研究领域:
材料科学
·
纳米技术
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光伏技术
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产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2016
·
IF 1.758
Wei Zhao,Bo Song,Jie Tao,Jiumeng Zhang,Meijuan Huang,Chun Wang,Maling Gou
The chance of exposure to heavy metal for human being rises severely today due to the increasing water contamination and air pollution. Here, we prepared a series of thiol-functionalized mesoporous silica as oral formulation for the prevention and treatment of heavy metal poisoning. The successful incorporation of thiol was verified by the FTIR spectra. SBA15-SH-10 was used for the study as it is of uniform mesopores and fine water dispersibility. In simulated gastrointestinal fluid, the thiol-functionalized mesoporous silica can selectively capture heavy metal, showing a very high affinity for inorganic mercury (II). The blood and urine mercury levels of rats fed with a diet containing Hg (II) and material were significantly lower than those of rats fed with the metal-rich diet only. On the contrary, the mercury content in fecal excretion of the treatment group increased more than twice as much as that of the control group. This result indicated that SBA15-SH-10 could effectively remove mercury (II) in vivo and the mercury loaded on SBA15-SH-10 would be excreted out. Hence, SBA15-SH-10 has potential application in preventing and treating heavy metal poisoning via digestive system.
研究领域:
毒理学
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材料科学
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产品关联
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 28
·13638-13645
·
IF 7.76
Jing Liu,Lixia Yuan,Kai Yuan,Zhen Li,Zhangxiang Hao,Jingwei Xiang,Yunhui Huang
The ithium–sulfur battery stands as one of the most promising successors of traditional lithium-ion batteries due to its super high theoretical energy density, but practical application still suffers from the shuttle effect arising from soluble intermediate polysulfides. Here, we report SnO2 as a chemical adsorbent for polysulfides. As an interlayer between the cathode and separator, SnO2 gives better results to prevent the polysulfides from diffusing to the lithium anode than as a modifier of the carbon matrix directly. The lithium–sulfur battery with an SnO2 interlayer delivers an initial reversible capacity of 996 mA h g−1 and retains 832 mA h g−1 at the 100th discharge at 0.5 C, with a fading rate of only 0.19% per cycle. The improvements benefit from the quasi-open space provided by the interlayer configuration for the diffused sulfur species, which can largely relieve the loss of active substances caused by the volume effect during the lithiation/delithiation process.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
Dan Jiang,Gong-Yu Jiang,Xiao-Xu Li,Fu-xing Xu,Liang Wang,Li Ding,Chuan-Fan Ding
An ion trap (IT) mass analyzer can be simply built with low cost material—the printed circuit board (PCB). A printed circuit board ion trap (PCBIT) can perform ion trapping, mass analysis, and tandem mass spectrometry as a conventional ion trap mass analyzer. In a PCBIT, each PCB electrode was fabricated to specially designed patterns with several separate electric strips. The strips’ electrodes were insulated from each other and applied with different voltages during the experiment. Therefore, the electric field distribution inside the ion trap region may be adjusted and optimized by simply adjusting the voltage on each strip. The performance of the PCBIT can also be optimized since the property of an ion trap is strongly dependent on the field distribution. The fabrication, operation, and performance of the PCBIT are described and characterized in this paper. A prototype PCBIT was built with two pairs of 64 mm × 12 mm PCB rectangular plates and one pair of 10 mm × 10 mm stainless steel square plates. A mass analysis with a resolving power of over 1500 and a mass range of around 3000 Th was observed. The mass-selected isolation and collision-induced dissociation (CID) of ions were also tested using the homemade PCBIT system. The adjustable electric field distribution, simple structure, and low cost of PCBIT make it certainly suitable for the further miniaturization of the portable mass spectrometer.
研究领域:
分析化学
·
仪器科学与技术
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产品关联
DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2023
·
IF 3.2
Farooq Aslam,Guanghao Qu,Yang Feng,Shengtao Li
It is well known that the interfacial region between the polymeric matrix and nanofiller plays a very important role in tailoring the electrical insulation properties of nanocomposite. In this study two type of polyhedral-oligomeric-silsesquioxane (POSS) are doped into epoxy (EP) to investigate the tailoring of interfacial traps that can limit the mobility of charge carriers and enhance the breakdown strength . Incorporating acryloxypropyl POSS (AP-POSS) to EP matrix improves the breakdown strength than that of pristine EP and octaphenyl POSS (OP-POSS). The molecular simulation and experiments identifies that the compatibility between EP/POSS and trap depth is dependent on the interfacial interaction energy and crosslinking density. The side groups of AP-POSS has large number of localized energy states and higher electron affinity ( E A ) that can tailor deeper traps and restrain the mobility of electrons in EP/AP-POSS. The interfacial compatibility of POSS side groups with EP tune the interfacial traps and dielectric characteristics.
研究领域:
材料科学
·
电气工程
·
纳米技术
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产品关联
DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 6
·1425-1434
·
IF 2.566
Cong Pan,Jun-Cheng Zhang,Min Zhang,Xu Yan,Hong-Di Zhang,Yun-Ze Long,Xin-Yuan Sun,Hai-Tao Jiang
Isomorphic materials tend to exhibit differentiated performance due to the small differences between the constituent atoms and the crystal structures. Inspired by the isomorphic strategy, herein we developed a novel trap-controlled mechanoluminescent (TC-ML) material, Pr3+-activated Sr2Nb2O7, that shows mechanoluminescence (ML) under the mechanical actions of compression and friction. Compared to the isomorphic Ca2Nb2O7:Pr3+ which requires a long-time delay to achieve high-contrast ML due to the strong long-lasting afterglow, Sr2Nb2O7:Pr3+ enables the obtaining of high-contrast ML in a short-time delay because of the weak short-lasting afterglow, which greatly simplifies the imaging process to facilitate the further application of ML. The investigations of structural and optical characteristics between Sr2Nb2O7:Pr3+ and Ca2Nb2O7:Pr3+ reveal that the unique ML of Sr2Nb2O7:Pr3+ should result from its lower trap concentration and shallower trap depth relative to Ca2Nb2O7:Pr3+. Our results are expected to deepen our understanding on the behavioral diversity of isomorphic phosphors and thereby broaden the horizon of designing and regulating TC-ML materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Shizhe Lin,Shuixiang Wang,Wei Yang,Shuwen Chen,Zisheng Xu,Xiwei Mo,He Zhou,Jiangjiang Duan,Bin Hu,Liang Huang
Recently, wearable and breathable healthcare devices for air filtering and real-time vital signs monitoring have become urgently needed since virus and particulate matter (PM) cause serious health issues. Herein, we present a trap-induced dense monocharged hybrid perfluorinated electret nanofibrous membrane (HPFM) for highly efficient ultrafine PM0.3 removal with an efficiency of 99.712% under low pressure drop (38.1 Pa) and high quality factor of 0.154 Pa–1. Furthermore, a recyclable multifunctional healthcare mask is constructed by integrating the HPFM-based nanogenerator, which realizes efficient PM0.3 filtering and wireless real-time human respiration monitoring simultaneously. More importantly, the performance of this mask is still relatively stable even at 100%RH humidity and 92 °C temperature conditions for 48 h, which infers that it can be reused after disinfection. The strategy of fabricating HPFM provides an approach to obtain charge-rich stable electret materials, and the design of multifunctional masks demonstrates their potential application for future personal protection and health monitoring devices.
研究领域:
材料科学
·
纳米技术
·
环境工程
·
柔性电子
·
健康监测
✓ 已验证
DOI
高影响因子
Cell Reports
·
2026
·Vol. 45
·期 6
·
IF 7.7
Han Meng,Wenchao Hu,Enming Kang,Qing Xu,Pengfei Wang,Xuyang Yi,Honghui Mao,Bowen Zhang,Xinyu Meng,Yanjin Wang,Yanchen Tan,Zhuqing Mao,Xingxing Zheng,Lina Niu,Ming Shi,Ceng Luo,Shengxi Wu,Rougang Xie,Yazhou Wang
Neutrophil-involved neuroinflammation in dorsal root ganglion (DRG) plays double-sword roles in chronic pain. How DRG neuron-neutrophil interaction contributes to chronic pain remains unclear. Here, we report that MLKL, a key molecule in necroptosis, is constitutively expressed in the nucleus of nociceptive neurons and binds to histone H3. Periphery inflammation disrupted MLKL/H3 interaction, leading to cytoplasmic translocation of MLKL and release of histone H3. Extracellular histone H3 induces neuronal hyperactivity, neutrophil extracellular trap (NET), and hyperalgesia, possibly through P2X7 receptor and Toll-like receptor 4. Nociceptive-specific depletion of Mlkl significantly decreased pain threshold and exacerbated NET formation independent of cell death. Neutralizing extracellular histone, clearing extracellular DNA or restoring nuclear localization of MLKL can reduce both NET formation and hyperalgesia in Mlkl −/− m ice. These data demonstrated that the nociceptive neuron-neutrophil interaction mediated by this MLKL-histone-NET cascade may serve as a potential therapeutic target for chronic inflammatory pain.
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DOI
PubMed
高影响因子
ACS Nano
·
2026
·
IF 17.3
Ran Zhao,Guohua Ma,Zhenwang Luo,Shareen Shafique,Feiyu Zhao,Zhenfu Zhao,Xu Wang,Fei Zheng,Ziyang Hu
Photodetectors capable of switching between photovoltaic (PV) and photomultiplication (PM) modes are highly desirable for adaptive sensing and optical communication, but integrating high sensitivity with high speed remains a fundamental challenge. Here, we overcome this trade-off by demonstrating a bias-switchable perovskite photodetector (PD) based on a quasi-two-dimensional perovskite via interfacial deep-trap engineering. By tailoring interfacial trap states at the perovskite interface, trap-enabled barrier narrowing and facilitated hole injection are activated at low bias, producing high gain without sacrificing speed. The optimized device operates in self-powered PV mode at 0 V, delivering a detectivity (D*) of 1.12 × 1011 Jones and fast rise/fall times (τr/τf) of 2.10/1.21 μs. Under an ultralow reverse bias of -0.3 V, it achieves a record-high external quantum efficiency exceeding 2100%, a D* of ∼1.7 × 1012 Jones, and μs-level τr/τf in PM mode. Compared with state-of-the-art dual-mode PDs, our approach achieves the lowest bias and μs-level response simultaneously. This bias-switchable perovskite PD integrated with PV and PM dual-mode capability eliminates the need for external amplification circuits and provides rapid detection, highlighting significant potential for applications in portable sensing and dynamic optical environments.
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DOI
高影响因子
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