CERAMICS INTERNATIONAL
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2019
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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
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薄膜技术
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Huan Ling,Xiaowen Wu,Ke Li,Fengyu Su,Yanqing Tian,Dan Luo,Yan Jun Liu,Xiao Wei Sun
Electrochromic (EC) devices with reversible transmittance switching have promising prospects in the applications of photoelectric displays. Herein, a novel air-stable and high contrast solution-phase electrochromic device based on new viologen derivative (DPB) with A-D-A structure (A: acceptor; D: donor) was demonstrated. Devices possessed simple configuration of ITO/EC solution/ITO. Ferrocene and polycarbonate (PC) were selected as the complementary material and solvent, respectively. All of the fabrications and performance testing work were conducted in normal air condition. The DPB-based device showed deep magenta color in colored state and exhibited high optical contrast of ΔT of 72.2% (517 nm) and good coloration efficiency of 102.2 cm 2 /C at 1.8 V. The device appeared only slight degradation of ΔT (ΔT = 69.6% or retained 96.7% of its initial ΔT after 5000 s constant switching) under the normal air atmosphere, which was even better than some reported well-packaged viologen-based solution ECDs. Additionally, the UV–vis reflective spectra were also conducted to assess the reflectance property of the devices. The reflectance peak (ΔR = 2.6%) and absorption peak matched accurately, which indicated that the new viologen derivative possesses the potential application in reflective electrochromic devices.
研究领域:
材料科学
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电化学
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光电
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Zijian Li,Zijie Tang,Jilin Yan,Hao Peng,Yifeng Tu
Stroke, or cerebral apoplexy, is a paroxysmal disease that seriously threatens the neurological functions of middle-aged and older men, resulting in high rates of disability and mortality. The blood level of Corin can accurately predict the risk and subtype of stroke. Herein, an immunosensor was developed utilizing a nanocomposite of Au nanoparticles and Co 3 O 4 nanocubic cages (AuNPs/Co 3 O 4 NcC) as the sensing substrate, with luminol serving as the sensing probe for Corin detection. Through the application of 3-aminopropyltrimethoxysilane, AuNPs/Co 3 O 4 NcC was affixed to the surface of indium tin oxide (ITO)-coated glass, considerably enhancing the electrochemiluminescence (ECL) performance of luminol due to its peroxidase-like activity. To confer biological specificity by immobilizing the Corin antibody on this substrate and to block residual active sites with bovine serum albumin, an immunosensor was developed. The capture of Corin protein by the antibody through an immune reaction, leading to its binding on the sensor, resulted in a decreased ECL signal. Under optimized conditions, the proposed ECL immunosensor demonstrated a broad linear response range from 1 pg/mL to 4800 pg/mL and a low detection limit of 0.26 pg/mL. This ECL immunosensor is characterized by its specificity, stability, and reproducibility and can detect Corin in real blood samples.
研究领域:
生物传感器
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电化学
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纳米技术
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医学诊断
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中风研究
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Qian Wang,Huanshun Yin,Yunlei Zhou,Jun Wang,Shiyun Ai
As an important epigenetic modification, 5-formylcytosine (5fC) plays a vital role in cell differentiation, genomic DNA structure and function regulation. Its low abundance in all suckler tissues and cells and high structural similarity with cytosine (C) and its derivatives, the sensitive and selective detection method for 5fC is required. In this work, a photoelectrochemical biosensor was constructed using BiIO 4 -WS 2 composite as photosensitive material, the synergy of ternary heterojunction of BiIO 4 -WS 2 /CuO as signal amplification technology and 5-formylcytosine deoxyribonucleoside (5fdC) as target. Firstly, the ITO electrode modified by BiIO 4 -WS 2 was aminated by (3- aminopropyl) triethoxysilane. 5fC was captured on the electrode surface with amidogen as recognition reagent, based on the amide bond formed between amidogen and aldehyde group. Then, 4-carboxyphenylboronic acid (4-CPBA) was linked by covalent reaction between boronic acid and O -diol of 5fdC. Finally, the signal amplification material of amino-functionalized CuO was deposited on the electrode surface through the formation of amide bond based on −COOH of 4-CPBA and –NH 2 on CuO. In view of the constitution of a ternary heterojunction between CuO and BiIO 4 -WS 2 , the photoactivity of BiIO 4 -WS 2 was greatly enhanced, which also increased the detection sensitivity with the wide examination area from 0.005 to 200 nM and low limit of detection was 0.38pM (3σ). Based on the specific covalent identification pattern, this method showed high selectivity for 5fC, even discriminating 5fC with C and 5hmC. The impacts of antibiotics and heavy metals on 5fdC content change in genomic DNA of wheat tissues were investigated, and thus the feasibility of this work was evaluated.
研究领域:
分析化学
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生物化学
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材料科学
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生物技术
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表观遗传学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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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
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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 Electronic Materials
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2019
·Vol. 6
·期 1
·1900493
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IF 6.312
Huiwu Mao,Chen Gu,Shiqi Yan,Qian Xin,Shuai Cheng,Peng Tan,Xiangjing Wang,Fei Xiu,Xiaoqin Liu,Juqing Liu,Wei Huang,Linbing Sun
Low-dimensional MXene materials including MXene quantum dots (MQDs) and nanosheets have attracted extensive attention owing to their unique structures and novel properties, but their most attractive features are still less explored than expected. A systematic study of the memory effects of MQD-based electronics is reported. Monodisperse MQDs are prepared by using a one-step facile hydrothermal synthetic method. By varying the MQD content in polyvinylpyrrolidone (PVP) hybrid composite films, the electrical conductance of an indium tin oxide (ITO)/MQD-PVP/gold (Au) sandwich structure can be tuned precisely from insulator behavior to irreversible resistive switching, reversible resistive switching, and conductor behavior. These irreversible and reversible resistive switches are capable of exhibiting write-once-read-many times (WORM) and flash memory effects, respectively. Both types of devices operate stably under retention testing, with a high on/off current ratio up to 100. The tunable memory and transient features of these hybrid films are likely due to MQD charge trapping due to their quantum confinement and dissolvability of memristive components. The results suggest that MXene nanomaterials are promising as resistive switching trigger for emerging nonvolatile memories for data storage, specially data storage security.
研究领域:
材料科学
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纳米技术
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电子学
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存储器件
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数据存储
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2016
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IF 7.476
Yuan-Cheng Zhu,Fei Xu,Nan Zhang,Wei-Wei Zhao,Jing-Juan Xu,Hong-Yuan Chen
This work reports the use of compositionally heterogeneous asymmetric [email protected] core–satellite nanoassembly functionalized with DNA sequence as unique signaling nanoprobes for the realization of new energy-transfer-based photoelectrochemical (PEC) immunoassay of prostate- specific antigen (PSA). Specifically, the [email protected] asymmetric core–satellite nanoassemblies ( [email protected] ACS) were fabricated on a two-dimensional glass substrate by a modified controlled assembly technique, and then functionalized with DNA sequences containing PSA aptamers as signaling nanoprobes. Then, the sandwich complexing between the PSA, its antibodies, and the signaling nanoprobes was performed on a CdS QDs modified indium tin oxide (ITO) electrode. The single stranded DNA can server as a facile mediator that place the [email protected] ACS in proximity of CdS QDs, stimulating the interparticle exciton–plasmon interactions between [email protected] ACS and CdS QDs and thus quenching the excitonic states in the latter. Since the damping effect is closely related to the target concentration, a novel energy-transfer-based PEC bioanalysis could be achieved for the sensitive and specific PSA assay. The developed biosensor displayed a linear range from 1.0×10 −11 g mL −1 to 1.0×10 −7 g mL −1 and the detection limit was experimentally found to be of 0.3×10 –13 g mL −1 . This strategy used the [email protected] ACS-DNA signaling nanoprobes and overcame the deficiency of short operating distance of the energy transfer process for feasible PEC immunoassay. More significantly, it provided a way to couple the plasmonic properties of the Ag NPs and Au NPs in a single PEC bioanalytical system. We expected this work could inspire more interests and further investigations on the advanced engineering of the core–satellite or other judiciously designed nanostructures for new PEC bioanalytical uses with novel properties.
研究领域:
纳米技术
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生物化学
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分析化学
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生物物理学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Cuizhong Zhang,Hongjie Liu,Wanting Nong,Jinyun Peng,Liwei Wang,Liya Zhou
A novel photoelectrochemical (PEC) aptasensor coupled with a Z‑scheme was developed to realize quantitative determination of 3,3′,4,4′-tetrachlorobiphenyl (PCB77) at a concentration of sub-picogram per liter. The PEC aptasensor was fabricated by immobilizing ZnSe/Ag 2 Se on indium-tin oxide (ITO) that could covalently bind sulfurized aptamer. Meanwhile, complementary DNA-functionalized CdTe units were used as the sensitizers, and these were immobilized on the aptamer to form Z‑scheme dual-photosystem (PS). The Z‑scheme PS based on both ZnSe/Ag 2 Se and CdTe would be provided with better photocatalytic activity than conventional heterojunctions , and improving the photo-to-current conversion efficiency without biased voltage. Following the process of hatching, PCB77 was captured via the aptamer on the PEC aptasensor, producing aptamer–PCB77 complexes with weak conductive performance. Using the photocurrent change as a response signal for the quantitative detection of PCB77, the detection limits of the proposed method were 0.05 pg L –1 and 0.22 ng L –1 for the linear ranges of 0.01–500 pg L –1 and 0.5–10 5 ng L –1 , respectively. Compared with other technologies, the PEC aptasensor is more flexible, sensitive, specific and rapid in the absence of biased voltage under visble light. The results presented herein can potentially help build a model for the detection of various polychlorinated biphenyls (PCBs) with stable chemical properties and insulation performances that can be used to study persistent organic pollutants (POPs) in marine organisms and in the analysis of environmental conditions.
研究领域:
环境科学
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分析化学
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海洋生物学
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污染监测
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
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IF 3.235
Xiaofang Ma,Jing Chen,Yali Wu,Samrat Devaramani,Xiaoyan Hu,Qixia Niu,Caizhong Zhang,Duoliang Shan,Huan Wang,Xiaoquan Lu
The RGO/AuNPs/CS/ZnTCPP nanocomposites were successfully prepared with reduced graphene oxide (RGO) loaded with Au nanoparticles (AuNPs) existed in chitosan (CS) and water-soluble zinc meso-tetra (4-carboxylphenyl) porphyrin (ZnTCPP) by π-π nanoassembly method and were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), 1 H NMR spectra and UV–vis absorption spectroscopy. The most important advantage of the RGO/AuNPs/CS/ZnTCPP nanocomposites was environmentally friendly. Indium tin oxide (ITO) electrode surface was modified with the RGO/AuNPs/CS/ZnTCPP nanocomposites exhibited a good photocurrent response at −0.2 V under whitelight of Xenon lamp illumination. The photocurrent response could be greatly increased by adding hydroquinone (HQ) to the solution. Electrons of ZnTCPP were excited from HOMO to LUMO by irradiating light. The photoexcited electrons injected into the RGO , and then transferred to AuNPs further to the ITO. Addition of HQ resulted in the enhanced photocurrent signal by acting as a sacrificial electron donor ; Thereby scavenged the photogenerated holes of the excited ZnTCPP and oxidized to benzoquinone (BQ). Based on the above interaction, detection of HQ was developed by a novel photoelectrochemical (PEC) sensor (S/N = 3) with a linear range from 5 to 300 nmol/L (r = 0.997) and detection limit of 0.5 nmol/L. Proposed biosensor is simple, rapid and this was successfully applied for the quantification HQ in the real sample matrices.
研究领域:
纳米技术
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光电化学
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环境科学
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分析化学
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材料科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
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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
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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
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光学材料
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Qian Luo,Xiaomin Qian,Xiaona Mi,Yifeng Tu
A new type of immunosensor was prepared by using a gold nanoparticles/aminozeolitic imidazolate framework-67 nanocomposite (AuNPs/ZIF-67) as the sensing matrix and luminol as the signaling probe to detect the heart failure biomarker N -terminal probrain natriuretic peptide (NT-proBNP). The hybrid nanocomposite was deposited on the surface of indium tin oxide (ITO)-coated glass via the linkage of 3-aminopropyltrimethoxysilane (APTMS); thereafter, the NT-proBNP antibody was immobilized to endow biological specificity, and bovine serum albumin was used to block residual active sites. The resultant sensor has an excellent response when NT-proBNP was attached to the antibody via immunoreaction; here, the output signal was reduced because of the depressed mass transportation of the electrochemiluminescence (ECL) probe and electron transference. The resultant ECL immunosensor displayed a broad linear range from 10 pg/mL to 50 ng/mL, and the low detection limit was 0.74 pg/mL. The ECL immunosensor also has good specificity, stability and reproducibility and can be used to detect NT-proBNP in real blood samples.
研究领域:
生物化学
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纳米技术
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分析化学
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医学诊断
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）