The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Christopher G Frost - One of the best experts on this subject based on the ideXlab platform.

Shougang Chen - One of the best experts on this subject based on the ideXlab platform.

  • New application of p-n junction in Electrochemical Detection: The Detection of heavy metal ions
    Journal of Electroanalytical Chemistry, 2019
    Co-Authors: Jinghua Shang, Minggang Zhao, Rongjie Gao, Shougang Chen
    Abstract:

    Abstract The 3D Ni/NiO/MoO3/chitosan foam was fabricated and the interfacial barrier of p-n junction was proposed as a driving factor for Electrochemical Detection of Cu2+. The Electrochemical response resulted from the decreased barrier height caused by the absorbed Cu2+. The liner range (0–25 μM) and the lower Detection limit (5.69 nM) were obtained. The direct Electrochemical Detection of Cu2+ in real water sample with excellent stability and recovery was achieved. It affords a new approach to achieve the direct Electrochemical Detection of metal ions with depressed interference by employing the interfacial effects of p-n junction.

  • Fabrication of CQDs/MoS2/Mo foil for the improved Electrochemical Detection.
    Analytica Chimica Acta, 2019
    Co-Authors: Jinghua Shang, Minggang Zhao, Shougang Chen
    Abstract:

    Abstract We proposed a new method for regulating the Electrochemical signal by using Schottky barrier. The results show that the height of Schottky barrier can be altered by adsorbing charged substance to control the enhancement and attenuation of Electrochemical signal. The Schottky interface formed by MoS2 and CQDs (carbon quantum dots) can achieve the selective Detection of dopamine and overcome the distraction of ascorbic acid and uric acid with similar redox signal. The combination of Schottky barrier and Electrochemical Detection enhance the sensitivity and selectivity of Electrochemical sensor significantly. It is a new strategy for improving Electrochemical Detection by introducing Schottky barrier into Electrochemical process.

  • Interfacial potential barrier driven Electrochemical Detection of Cr6.
    Analytica Chimica Acta, 2018
    Co-Authors: Zhao Minggang, Yunpeng Zhuang, Frank Cheng, Shougang Chen
    Abstract:

    Abstract 3D NiO/polyaniline p-p junction foam was prepared and applied for Electrochemical Detection of Cr6+. The Electrochemical Detection using interfacial potential barrier was illustrated and a mature theoretical model was built to demonstrate the mechanism. Electrochemical sensing signals of targets can be revealed by changing the height of potential barrier after specific adsorption. The extra high sensitivity (0.78 μA nM−1) and low Detection limit (3.96 × 10−4 nM) of Cr6+ were achieved by applying the p-p junction interfacial potential barrier as driven factors. This work proposes a model to apply the potential barrier for Electrochemical Detection of metal ions, which can be further developed for a wide range of specific substance Detection.

  • triggering interface potential barrier a controllable tuning mechanism for Electrochemical Detection
    Biosensors and Bioelectronics, 2016
    Co-Authors: Longjiang Ding, Jingjing Liang, Jingyun Huang, Minggang Zhao, Shougang Chen
    Abstract:

    A novel theory of employing interface potential barriers as a controllabe tuning factor for Electrochemical Detection is proposed. The 3D NiO/PANI/ZnO hierarchical heterostructure is fabricated by thermal oxidation, electropolymerization and electrodeposition. The 3D NiO/PANI/ZnO heterostructure is then chose as a model for Electrochemical Detection of dopamine, uric acid and ascorbic acid. The p-n and p-p junction interface potential barriers are employed as tuning factors to achieve high selectivity and sensitivity. Our results demonstrate the Electrochemical response to different targets can be controllable enhanced or weakened by rational design of interface potential barriers. The potential barrier height Φp-n is an enhanced tuning factor, and Φp-p is a selective tuning factor. We afford a controllable adjustive approach to achieve desired selectivity and sensitivity.

Richard A Mathies - One of the best experts on this subject based on the ideXlab platform.

  • capillary electrophoresis chips with integrated Electrochemical Detection
    Analytical Chemistry, 1998
    Co-Authors: Adam T Woolley, Kaiqin Lao, And Alexander N Glazer, Richard A Mathies
    Abstract:

    Capillary electrophoresis systems with integrated Electrochemical Detection have been microfabricated on glass substrates. Photolithographic placement of the working electrode just outside the exit of the electrophoresis channel provides high-sensitivity Electrochemical Detection with minimal interference from the separation electric field. Microchip electrophoretic separations of neurotransmitters in under 100 s exemplify the good resolution and attomole Detection sensitivity of these devices. Using indirect Electrochemical Detection, high-sensitivity DNA restriction fragment and PCR product sizing has also been performed. These microdevices match the detector's size to that of microfabricated separation and reaction devices, bringing to reality the lab-on-a-chip concept.

Sean Goggins - One of the best experts on this subject based on the ideXlab platform.

Joseph Wang - One of the best experts on this subject based on the ideXlab platform.

  • integrated explosive preconcentrator and Electrochemical Detection system for 2 4 6 trinitrotoluene tnt vapor
    Analytica Chimica Acta, 2010
    Co-Authors: Karel Cizek, Chad Prior, Kevin L Linker, John Wake, Avi Cagan, Jeffrey T. La Belle, Ray Tsui, Michal Galik, Chongdee Thammakhet, Joseph Wang
    Abstract:

    This article reports on an integrated explosive-preconcentration/Electrochemical Detection system for 2,4,6-trinitrotoluene (TNT) vapor. The challenges involved in such system integration are discussed. A hydrogel-coated screen-printed electrode is used for the Detection of the thermally desorbed TNT from a preconcentration device using rapid square wave voltammetry. Optimization of the preconcentration system for desorption of TNT and subsequent Electrochemical Detection was conducted yielding a desorption temperature of 120

  • Electrochemical Detection for Capillary Electrophoresis Microchips: A Review
    Electroanalysis, 2005
    Co-Authors: Joseph Wang
    Abstract:

    Electrochemistry Detection offers considerable promise for capillary-electrophoresis (CE) microchips, with features that include remarkable sensitivity, portability, independence of optical path length or sample turbidity, low cost and power requirements, and high compatibility with modern micromachining technologies. This article highlights key strategies in controlled-potential Electrochemical detectors for CE microchip systems, along with recent advances and directions. Subjects covered include the design of the Electrochemical Detection system, its requirements and operational principles, common electrode materials, isolation from the separation voltage, derivatization reactions, typical applications, and future prospects. It is expected that Electrochemical Detection will become a powerful tool for CE microchip systems and will lead to the creation of truly portable (and possibly disposable) devices.

  • Electrochemical Detection for microscale analytical systems: a review.
    Talanta, 2002
    Co-Authors: Joseph Wang
    Abstract:

    As the field of chip-based microscale systems continues its rapid growth, there are urgent needs for developing compatible Detection modes. Electrochemistry Detection offers considerable promise for such microfluidic systems, with features that include remarkable sensitivity, inherent miniaturization and portability, independence of optical path length or sample turbidity, low cost, low-power requirements and high compatibility with advanced micromachining and microfabrication technologies. This paper highlights recent advances, directions and key strategies in controlled-potential Electrochemical detectors for miniaturized analytical systems. Subjects covered include the design and integration of the Electrochemical Detection system, its requirements and operational principles, common electrode materials, derivatization reactions, electrical-field decouplers, typical applications and future prospects. It is expected that Electrochemical Detection will become a powerful tool for microscale analytical systems and will facilitate the creation of truly portable (and possibly disposable) devices.