JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenyuan Yu,Yanxuan Zhao,Jianping Ge
Anticounterfeiting materials based on the photonic crystal (PC) have attracted great interest due to their unique visual effects originating from the changeable structural colors under various external stimuli. However, there still are challenges to improving the anticounterfeiting performance by enhancing the complexity and diversity of the color changes. Here, we fabricated an electrically triggered anticounterfeiting tag by encapsulating the responsive PC with the surface-modified and patterned ITO electrode. The degree of Au deposition or chemical etching in different regions of the ITO was precisely controlled to achieve multi-level differentiated electrical responses, which made the invisible pattern of the tag at 0 V be “revealed in multicolor form” or “gradually revealed” under increasing voltages. The tag possessed two working modes, more diversified visual effects, good usability, and reversibility, which let it become a potentially useful material for anti-counterfeiting applications in the future.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2023
·Vol. 148
·期 20
·4995-5001
·
IF 4.2
Weixin Li,Xinyang Wang,Lifen Chen,Fang Luo,Longhua Guo,Cuiying Lin,Jian Wang,Bin Qiu,Zhenyu Lin
Two-dimensional (2D) layered MoS2 has good dispersion and adsorption properties, but being a narrow bandgap semiconductor limits its application in photoelectric sensing. In this study, a homogeneous photoelectrochemical sensor based on three-dimensional (3D) ZnO/Au/2D MoS2 is proposed for the ultrasensitive detection of tetracycline (TET). MoS2 is uniformly embedded on the 3D ZnO/Au surface by ordered self-assembly. The physical method of π–π interaction of MoS2 replaces the conventional use of chemically modifying aptamers on the electrode material surface. Under optimal conditions, this method has been successfully applied to the detection of TET in milk, honey, pig kidney and pork samples with reliable results. We believe that this study presents a method for the preparation of sensing carriers and target detection with great potential for application.
研究领域:
分析化学
·
环境科学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2019
·Vol. 40
·期 3
·214-219
·
IF 0.602
Jinyun Peng,Wenfeng Zhuge,Yingying Huang,Cuizhong Zhang,Wei Huang
In this study, a new photoelectrochemical (PEC) sensor based on the copper tetraamino-phthalocyanine-modified ITO electrode (CuTAPc/ITO) was designed for the determination of nifedipine. The prepared CuTAPc materials were characterized using UV–Visible spectrophotometry (UVS), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). Then, the CuTAPc solution was coated on the ITO electrode surface to fabricate a simple PEC sensing platform. Then, the photoelectrochemical behavior of nifedipine at the CuTAPc/ITO electrode was investigated by chronoamperometry under ultraviolet light irradiation. The obtained results indicated that the modified electrode showed a higher response signal than the blank electrode. The photocurrent of CuTAPc/ITO increased with the increasing concentration of nifedipine. The peak photocurrents were linearly dependent on the nifedipine concentration in the range of 0.25–18.0 μmol/L, thereby providing the detection limit of 0.15 μmol/L ( S / N = 3). Due to the good responses for the determination of nifedipine, this sensor can be used as an alternative analysis tool for the detection of nifedipine in various real samples with high sensitivity, low detection limit, and wide linearity range.
研究领域:
分析化学
·
药物分析
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYST
·
2016
·Vol. 141
·期 7
·2303-2307
·
IF 4.033
Lina Yao,Fei Yan,Bin Su
Halonitrobenzenes (HNBs) are a class of molecules that are highly toxic to human health and the ecological environment. Thus, effective and efficient approaches capable of monitoring and detecting HNBs are greatly desired. We report herein a simple and sensitive method for the detection of HNBs. The detection was based on the indium tin oxide (ITO) electrodes modified with a binary assembly of highly ordered surfactant micelles (OSMs) and silica mesochannels (SMs). The SMs have a diameter of 2–3 nm and a vertical orientation, which provide a hard support to stabilize soft OSMs. Moreover, each OSM consists of a hydrophobic core due to the organized assembly of surfactant hydrocarbon chains, which can selectively extract and concentrate lipophilic HNBs from aqueous media, allow their transport to the underlying ITO electrode surface and therein their detection by voltammetry. As a proof-of-concept experiment, 1-chloro-3-nitrobenzene, 1-chloro-4-nitrobenzene, 1-bromo-4-nitrobenzene and 2,4-dinitrobromobenzene were analyzed in aqueous solutions. A simple and fast detection was achieved in all cases, with a wide linear dynamic range, a high sensitivity and a low limit of detection at the ppb level. Apart from the extraction ability, the OSMs also prohibited the access of and surface contamination by unwanted substances, showing excellent anti-fouling and anti-interference power. Indeed, as we demonstrated, the sensor could be employed for direct electrochemical detection of HNBs in complex samples, such as lake water and soil dispersion, without any pre-treatment, indicating its potential usefulness in practical analysis.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 43
·2304474
·
IF 19
Wenyuan Yu,Yanxuan Zhao,Wenting Sheng,Jianping Ge
Electrically responsive photonic crystals (ERPC) are promising materials for electrophoretic displays, smart windows, and tunable optical devices. However, the high working voltage limits the application of most polar ERPCs because it damages color saturation, response stability, and reversibility. Herein, an easy but general method based on the modification of electrodes with nanoparticles is developed to improve ERPC's performance. The deposition of Au, Cu, or Cu 2 O nanoparticles created nanotip structures on the electrode, which enhanced the charge injection and local electric field strength, lowered 43% of the working voltage, and increased the color saturation. Meanwhile, the lowered voltage inhibited the electrodeposition of colloidal particles and the electrochemical reaction, which also improved the stability and reversibility of the electrical response. Based on the region-selective modification of the electrode and the resulting asymmetric electrical response, an electrically triggered tag with a “pattern showing/hiding” effect is fabricated for anticounterfeiting purposes.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2015
·
IF 1.09
Wen-Ting Li,Yu Wang,Fen-Fang Deng,Li-Li Liu,Hai-Jun Nan,He Li
A novel electrochemical immunosensor for determination of carcinoembryonic antigen (CEA) in human serum was fabricated by depositing Mo–Mn 3 O 4 /MWCNTs/Chits nanocomposite onto an indium-tin oxide (ITO) electrode. Mo-doped Mn 3 O 4 (MMO) was synthesized by sol–gel method and the presence of molybdenum improved its electrochemical properties. The MMO/MWCNTs/Chits nanocomposite could accelerate the electron transfer rate and enlarge the surface area to capture a large number of Carcinoembryonic Antigen (CEA). The factors influencing the performance of the immunosensor were investigated, such as incubation time, incubation temperature and pH. Under optimal conditions, the electrochemical immunosensor could detect CEA in a linear range from 0.1 ng ⋅ mL − 1 to 125 ng ⋅ mL − 1 with a detection limit of 4.9 pg ⋅ mL − 1 ( S ∕ N = 3 ). In addition, it exhibited high sensitivity and acceptable stability on a promising immobilization platform for signal amplification, which could be extended to other labeled recognition systems. This electrochemical immunosensor may provide potential applications for the clinical diagnosis.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Optoelectronics Letters
·
2018
·Vol. 14
·期 4
·262-266
·
IF 0
Hu Jun-tao,Ye Kang-li,Huang Yang,Wang Peng,Xu Kai,Wang Xiang-hua
In this paper, p-chlorophenylacetic acid and p-fluorophenylacetic acid were applied to modify the indium tin oxide (ITO) electrodes. The surface work functions of unmodified ITO, p-chlorophenylacetic acid modified ITO (Cl-ITO) and p-fluorophenylacetic acid modified ITO (F-ITO) are 5.0 eV, 5.26 eV and 5.14 eV, respectively, and the water contact angles are 7.3°, 59.1° and 46.5°, respectively. The increase of the work function makes the hole injection ability of the devices improved, which is proved by the hole transport devices. The self-assembly (SAM) layers transfer hydrophilic ITO to hydrophobic ITO, which makes ITO more compatible with the hydrophobic organic layers, making the organic film more stable during the operation. After modification, the organic light emitting diodes (OLEDs), SAM-modified ITO/NPB/Alq3/LiF/Al, with better performance and stability were fabricated. Especially, the OLED with Cl-ITO (Cl-OLED) has a maximum luminance of 22 428 cd/m 2 (improved by 32.9%) and a half-lifetime of 46 h. Our results suggest that employing organic acids to modify ITO surface can enhance the stability and the luminescent properties of OLED devices.
研究领域:
材料科学
·
光电功能材料
·
表面化学
·
有机电子学
·
器件物理
·
薄膜稳定性
✓ 已验证
DOI
ELECTROANALYSIS
·
2016
·Vol. 29
·期 4
·965-974
·
IF 2.471
Yingqiao He,Guodong Wei,Junhong Lin,Mingxu Sun,Ziheng Li
A novel non-enzymatic carbohydrates sensor which was an indium tin oxide (ITO) glass electrode modified by nickel and copper nanoparticles (Cu/Ni/ITO) was developed by an electrochemical method. The crystallinity, morphology, electrochemical measurements and amperometric response of the as-prepared ITO modified electrode were examined by the X-ray diffraction (XRD), scanning electron microscopic (SEM), cyclic voltammetry (CV) and chronoamperometry, respectively. The Cu/Ni/ITO electrode had better electroactivity for glucose oxidation than that obtained using Cu/ITO, Ni/ITO, and Ni/Cu/ITO. The logistic regression equation, I pa = ( A 1 – A 2 )/[1 + ( C glucose / x 0 ) p ] + A 2 , was used to fit the calibration curves of glucose aqueous solution concentrations and responsive current intensity. In research of other saccharides, such as fructose, lactose, sucrose, and maltose, which were detected by the Cu/Ni/ITO electrode, it was obvious that the Cu/Ni/ITO electrode was more sensitive to monosaccharides than disaccharides. Monosaccharides and disaccharides can be detected because the saccharides themselves had aldehyde group or be isomerized to an isomer having an aldehyde group in alkaline environment, and then aldehyde group produced carboxylic acid in the catalytic oxidation of the electrode, which lead to the change of electrode surface conductivity and the appearance of oxidation peak, and the alkaline environment further promotes the above reaction.
研究领域:
生物化学
·
材料科学
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Shujie Hu,Zhiyuan Cao,Lin Zhou,Rongliang Ma,Bin Su
An efficient method has been developed for visualizing latent fingerprints by spatially selective electropolymerization of luminol on the ITO electrode. The fingerprint deposited on the electrode surface functions as a mask so that polyluminol is formed on the bare electrode surface. Therefore, electrochemiluminescence is only generated between the ridges of fingerprint, eventually yielding a negative ECL image. This method is easy to operate and safe to examiners. In addition, the second- and third-level details of fingerprints can be well resolved, indicating the potential application for personal identification and forensic investigation.
研究领域:
法医学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 46
·10630-10636
·
IF 5.344
Xinyu Ma,Wenyan Liao,Huaxu Zhou,Yun Tong,Fei Yan,Hongliang Tang,Jiyang Liu
Herein we report a simple and rapid approach to fabricate a vertically-ordered mesoporous silica–electrochemically reduced graphene oxide nanocomposite film (VMSF/ErGO) on an indium tin oxide (ITO) electrode surface by the electrochemically-assisted self-assembly (EASA) method, which is capable of greatly promoting the electroanalytical performance of rutin compared to the previously reported VMSF modified ITO electrode and, meanwhile, displaying excellent anti-fouling and anti-interference ability in pharmaceutical formulations and human serum. Due to the excellent electrocatalytic activity of ErGO and the synergistic enrichment effects from the π–π interaction of ErGO and the hydrogen bond effect from the VMSF, the present VMSF/ErGO/ITO sensor is able to detect rutin with a wide linear range, a high sensitivity and a low limit of detection. Moreover, the VMSF/ErGO/ITO electrode could retain the high sensing performance with high transmittance upon tailoring the concentration of the modified graphene oxide (GO), which provides a simple approach for modifying transparent ITO electrodes and could be potentially used for optoelectronic devices.
研究领域:
分析化学
·
生物医学工程
·
药物分析
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jiajing Xu,Weiqiang Yang,Jiancong Ni,Qingxiang Wang,Zhenyu Lin
Electrochemiluminescence (ECL) arises from the collisional annihilation between the electro-excited luminophore and co-reactant. Most ECL-based bioassays require extensive free co-reactants that collide with luminophores randomly. Herein, the N,N-dimethylaniline (DMA) group was electro-grafted on the ITO electrode surface as the bottom co-reactant layer, and the vertically ordered mesoporous silica film (VMSF) was prepared as the upper layer to regulate the accessibility of Ru(bpy) 3 2+ . Thus, the dual-layer functionalized VMSF/N-ITO was newly built for the controllable ECL study. Relevant conditions, including the DMA electro-grafting, VMSF thickness, buffer concentration and pH value, were discussed to improve the ECL efficiency. Based on the VMSF/N-ITO platform, a homogeneous ECL bioassay was developed for miRNA-21 detection. The target nucleotide sequence induced the hybridization chain reaction (HCR) of probes H1 and H2 to absorb free Ru(bpy) 3 2+ as much as possible. Residual Ru(bpy) 3 2+ permeated the VMSF nanochannels to collide with the DMA co-reactant in producing an ECL response. There was a linear relationship between ∆ECL intensity and logarithmic concentration of miRNA-21 in the 1 fM ∼ 100 pM range, and the detection limit was 0.25 fM. The developed approach was probes immobilization-free, highly sensitive, and anti-interference, opening a new avenue for ECL-based bioassays.
研究领域:
分析化学
·
生物化学
·
纳米技术
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2023
·
IF 5.5
Chen Dong,Luo Xuan,Xi Fengna
Sensitive detection of tumor biomarkers is crucial for early diagnosis and prognosis evaluation of cancer. Owing to no need of labelled antibody, formation of sandwich immunocomplexes and additional solution-based probe, probe-integrated electrochemical immunosensor for reagentless detection of tumor biomarkers is highly desirable. In this work, sensitive and reagentless detection of a tumor biomarker is realized based on fabrication of a probe-integrated immunosensor by confining redox probe in electrostatic nanocage array modified electrode. Indium tin oxide (ITO) electrode is employed as the supporting electrode because it is cheap and easily available. The silica nanochannel array consisted of two layers with opposite charges or different pore diameters was designated as bipolar films (bp-SNA). In this work, Electrostatic nanocage array is equipped on ITO electrode by growth of bp-SNA with two layered nanochannel array having different charge properties including a negatively charged silica nanochannel array (n-SNA) and a positively charged amino-modified SNA (p-SNA). Each SNA can be easily grown with 15 s using electrochemical assisted self-assembly method (EASA). Methylene blue (MB) is applied as the model electrochemical probe with positive charge to be confined in electrostatic nanocage array with stirring. The combination of the electrostatic attraction from n-SNA and the electrostatic repulsion from p-SNA endows MB with highly stable electrochemical signal during continuous scanning. When the amino groups of p-SNA are modified using the bifunctional glutaraldehyde (GA) to introduce aldehydes, the recognitive antibody (Ab) of the most commonly used tumor biomarker, carcinoembryonic antigen (CEA), can be covalently immobilized. After the non-specific sites are blocked, the immunosensor is successfully fabricated. As the formation of antigen-antibody complex decreases electrochemical signal, the immunosensor can achieve reagentless detection of CEA ranged from 10 pg/mL to 100 ng/mL with a low limit of detection (LOD, 4 pg/mL). Determination of CEA in human serum samples is realized with high accuracy.
研究领域:
生物医学工程
·
分析化学
·
癌症诊断
✓ 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）