APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Feng Chen,Yazhi Zhu,Wei Li,Jintao Yang,Ping Fan,Zhengdong Fei,Mingqiang Zhong,Lingqian Chang,Tairong Kuang
Surfaces with stimuli-responsive properties have shown prominent applications in bioengineering, controlled drug release and biosensors in recent years. In this work, we report a surface-initiated reversible addition–fragmentation chain transfer polymerization method to graft azobenzene-containing diblock copolymer (azo-BCP) brushes onto an Indium Tin Oxide (ITO) glass surface. In this method, a sequential azo block serves as the outer layer that controls the closure or opening of the brushes, and the second block (PDMAEMA) acts as the inner layer that switches between swollen and collapsed chain states in response to different pH values and temperatures. Upon exposure to UV light, the ITO surface became more hydrophilic (>10° change of contact angles), and its friction coefficient (0.5–0.9) increased; this suggests a loose aggregation of the azo block. Additionally, the ion conductivity of the ITO surface can be influenced by the aggregation state of the azo-BCP brushes, thus leading to the transportation of light-triggered ions under various pH values and temperatures. This work provides a deep understanding of the surface properties of a sensitive hybrid material upon various stimuli for electrode purpose, thereby paving the way for the development of bioengineering and environmental sensory applications.
研究领域:
生物工程
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材料科学
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传感器技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 12
·1028
·
IF 4.4
Haowei Lin,Shibo Xing,Ao Jiang,Mingxuan Li,Qing Chen,Zhenling Wang,Lei Jiang,Huiying Li,Jie Wang,Chenchen Zhou
Large-area oriented ZnO nanoarrays (including nanowire, nanorod, and nanotube) on ITO glass substrates are synthesized via the simple hydrothermal, electrodeposition, and electrochemical etching approach. The morphology of ZnO nanoarrays is controlled by adjusting the reaction temperature, reaction time, and current density. The scanning and transmission electron microscopy (SEM and TEM) results indicate the successful preparation of large-area oriented ZnO nanoarrays with different types, and the energy-dispersive X-microanalysis spectrum (EDS) and X-ray diffraction (XRD) results confirm that the composition of the obtained nanoarrays is ZnO. More importantly, the as-prepared ZnO nanotube arrays are observed with about a 40% increase in ultraviolet absorption intensity compared to the ZnO nanowire/nanorod arrays, due to having larger specific surface areas. The as-prepared different types of ZnO nanoarrays have great potential for applications in low-cost and high-performance optoelectronic devices.
研究领域:
材料科学
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纳米技术
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光电材料
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Le Huy Thai,Le Thi Thanh Nhi,Truong Chau Giang,Nguyen Minh Hiep,Truong Quang Trung,Tran Quang Hung,Le Hoang Sinh
A new 3D printed multicolor Prussian blue-viologen inorganic-organic hybrid electrochromic device was successfully developed using digital light processing. Photocurable 1-(2 cyanophenyl)-1′-(2-hydroxyethyl)-[4,4′-bipyridine]-1,1′-diium (CPHEV)-based ionogel was printed on ITO glass as an electrochromic layer. The thin film of Prussian blue (PB) was electrodeposited on another ITO glass as an ion storage layer. With PB thin film, the ECDs exhibited a bleaching time 330 times faster than that of ECDs without PB. The ECD showed excellent electrochromic performance with a high color contrast ratio of 93.4 % at -2.5 V with a pulse width of 5 s. Moreover, the ECDs also exhibited multi-coloration in L*a*b* color space with the highest different color points (ΔE* ab ) value of 75.2 between the bleaching state and coloring state. A high coloration efficiency of the ECD was obtained at 296 cm 2 C -1 corresponding to 60 % of a full optical switch at -2.5 V. The 3D printed ECD was successfully demonstrated using digital light processing (DLP) with high dimensional accuracy and resolution.
研究领域:
材料科学
·
电化学
·
纳米技术
·
光电技术
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产品关联
DOI
高影响因子
Environmental Science-Nano
·
2019
·Vol. 7
·期 2
·554-570
·
IF 7.704
Xinrui You,Chunyu Huang,Wei Huang,Guoyue Shi,Jingjing Deng,Tianshu Zhou
In this work, we have developed a novel method for preparing a CoOx/GO catalyst supported on ITO glass by electrochemical post-treatment of redox-active infinite coordination polymer (ICP) {Co(3,5-dbsq)(3,5-dbcat)(bix)} nanoparticles. Firstly, highly dispersed CoOx nanoparticles with ultra-small size and narrow size distribution (1.42 ± 0.34 nm) were in situ synthesized on ITO glass after electrochemical polarization of ICP coated on ITO glass at −1.1 V for 16.7 min (1000 s) in 0.10 mol L−1 KCl. Graphene oxide (GO) was next mixed with the ICP to obtain the CoOx/GO catalyst supported on ITO glass (the size of CoOx nanoparticles ranged within 1.21 ± 0.28 nm), which proved to have improved catalytic performance and enhanced stability compared to the pure CoOx. The catalytic activity of this CoOx/GO catalyst was then optimized according to the degradation efficiency of methylene blue (MB) via an advanced oxidation process in the presence of peroxymonosulfate (PMS). Under the optimal conditions here, the enhanced catalytic oxidative degradation of dye solution could be achieved easily. 100% of MB (2.0 mL, 20 mg L−1) could be decomposed within 6.7 min, which is better than other CoOx catalysts. With this kind of ITO glass as a component part, a portable reactor was constructed for the first time. Real-time monitoring of the catalytic degradation of colored wastewater from the textile and cosmetic industries was then achieved using this reactor directly by incorporating a UV/vis spectrometer, which is of great importance for information analysis and process control optimization during industrial wastewater treatment.
研究领域:
环境科学
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催化
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材料科学
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化学工程
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水处理
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产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 5
·1745-1750
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IF 1.821
Guolin Yuan,Junlin He,Yuan Li,Wailan Xu,Liuliu Gao,Chao Yu
In this work, a novel, ultrasensitive electrochemical immunosensor has been fabricated for the determination of gypican-3 (GPC3) in human serum. A disposable indium tin oxide (ITO) glass array was used as the working electrode on which pyrrole-α-carboxylic acid (Py-α-COOH) was electropolymerised. This approach provided a high content of surface-confined carboxyl groups suitable for the direct covalent binding of GPC3 antibody. In the immunosensor system, the “fluorescence microscopy” technique was first used for the characterisation of carboxyl groups. Meanwhile, the electrode was characterised by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). Using GPC3 as a model analyte, the immunoassay exhibited high sensitivity, acceptable stability and reproducibility with a wide linear range from 0.9 pg mL−1 to 9 ng mL−1 and an ultra-low detection limit of 0.3 pg mL−1 (S/N = 3). The results for real sample analysis in human serum demonstrated that the newly constructed immunosensor array provided a rapid, simple and cost-efficient immunoassay with high throughput and sufficiently low detection limits for clinical applications.
研究领域:
分析化学
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生物传感器
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电化学
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医学诊断
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Weihua Wu,Lingyan Liang,Jingjing Yu,Xi Xiao,Hongliang Zhang,Junhua Gao,Fei Zhuge,Ting-Chang Chang,Linfeng Lan,Hongtao Cao
Dielectrics fabrication on rough substrates, always leading to microstructural defects and detrimental dielectric properties eventually, is a great challenge for academic endeavors in this field. We report here on self-flattening AlO x :Y dielectric thin films processed by a facile aqueous solution method. The obtained AlO x :Y dielectrics are dense, large-area uniform, and amenable to accurate control of film thickness by repeating the deposition cycles. In particular, an atomically smooth surface with a RMS of 0.10 nm was realized for the AlO x :Y film with a thickness of 14.5 nm on Si wafer, yielding a low leakage current density of 7.9 × 10 -8 A cm -2 @2 MV/cm, a dielectric constant of 8.8 @100 Hz, and an attenuated dielectric dispersion property. The interactions between pre-baked YO x underlayer and later-dropped AlO x precursor were comprehensively investigated, in order to understand the film growth mechanism and the origin of self-flattening effect. Fortunately, this self-flattening effect is also applicable to other substrates. A RMS of 0.81 nm was achieved on ITO glasses , and the height distribution profile of the film surface was found to follow symmetric Gaussian distribution. This preparation routine was also examined by device verification in the fully-transparent thin-film transistors. The combination of ease of preparation and attractive physical properties would provide a green-route solution platform for dielectric synthesis, for interface engineering, and for well-performed devices on rough substrates.
研究领域:
材料科学
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电子学
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纳米技术
·
薄膜技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xiaolin Qu,Peng Qi,Peng Wang,Jiawei Li,Congyu Wang,Dun Zhang,Yi Wan,Shiyun Ai,Xiaoqiang Wang
A self-powered biosensing system based on triboelectric nanogenerator (TENG) for bacterial DNA detection is invented and a vertical contact-separation TENG was designed to provide a steady power supply to a detection bioreactor . A carboxyl-functionalized capture probe was modified on etched indium tin oxide (ITO) glass, with which target bacterial DNA could be recognized. Meanwhile, multi-walled carbon-nanotubes (CNT)-modified signal probe was designed to amplify the detection signal due to its excellent electrical conductivity . The self-powered biosensing system could measure the variation in output voltage and be highly sensible with a low detection limit at 0.084 pM of target DNA. In addition, a mathematical model based on the Freundlich isotherm was built to simulate the DNA detection process, and it was feasible to simulate the calibration equation and detection range. A portable self-powered biosensing device was made by integrating miniaturized TENG and bioreactor in a 3D-printed mold, with which the presence of bacterial DNA could be instantly indicated by LED (light-emitting diode). This study provided a useful platform for quick bacterial DNA detection and paved the way for further development of pocket diagnosis with TENG-based biosensing systems.
研究领域:
纳米技术
·
生物传感器
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电化学
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Qian Li,Tong Wang,Qu Wang,Kaihao Wang,Li Wang,Wantai Yang
Engineering advanced thermochromic smart windows capable of simultaneously addressing multifaceted performance, durability, and multifunctionality requirements is crucial for their practical applications. Herein, a mini library of lower critical solution temperature (LCST) copolymers with well-defined structure and programmed hydrophile-lipophile balance (HLB) is synthesized by the reversible addition-fragmentation chain transfer (RAFT) copolymerization of highly hydrophilic N-vinylpyrrolidone (NVP) and four maleimide derivative (MI) monomers with descending hydrophilicity. MI-NVP copolymers afford a copolymer composition-dependent phase transition temperature tunable over an ultra-wide range of 20–67 °C and efficient UV shielding capability. By ingeniously doping MI-NVP copolymers into non-thermoresponsive polyacrylamide hydrogel, smart windows with outstanding thermochromic properties, solar modulation performance, inherent stability (1000 cycles), and fast response rate (14 ± 2 s) are obtained. Further integration with photothermal Cs x WO 3 or electrothermal indium tin oxide (ITO) glass delivers enhanced spectral selectivity or active-mode regulation. Overall, by meticulously tailoring the multilevel structure of thermochromic hydrogels, this strategy establishes a novel MI-NVP copolymer platform for thermochromic smart windows that significantly advances energy conservation and occupant comfort.
研究领域:
材料科学
·
高分子化学
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智能窗户
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建筑节能
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功能高分子
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）