Current Topics in Electrochemistry最新文献

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Label-based and label-free electrochemical DNA biosensors for the detection of viruses: A review 基于标记和无标记的电化学DNA生物传感器用于病毒检测:综述

Q4 Energy

Current Topics in Electrochemistry

Pub Date : 2021-12-31 DOI: 10.31300/ctec.23.2021.117-127

N. Satriana, S. Gaffar, T. Subroto, Y. Hartati

Nowadays, the rapid determination of several viruses is highly important. Most of the rapid detection of human pathogen viruses has been developed by using biosensor technology. The detection layer of the biosensor consists of short single-stranded DNA (probe) able to form a duplex with a complementary target nucleic acid fragment with high efficiency and specificity. The probe is associated with a transducer that translates the hybridization event into a physically measurable value based on electrochemical methods. Electrochemical DNA biosensors offer merits such as rapid response, portability, high sensitivity, ease of use, and low detection limit. This review provides an overview of label-based and label-free electrochemical DNA biosensors for the detection of viruses as well as their application in the past four years.

目前，快速确定几种病毒是非常重要的。大多数人类病原体病毒的快速检测都是利用生物传感器技术发展起来的。该生物传感器的检测层由短单链DNA(探针)组成，能够与互补的靶核酸片段形成双链，具有高效率和特异性。探头与传感器相关联，传感器将杂交事件转换为基于电化学方法的物理可测量值。电化学DNA生物传感器具有反应快、便携、灵敏度高、使用方便、检出限低等优点。本文综述了近四年来基于标记和无标记的电化学DNA生物传感器在病毒检测中的应用。

引用次数: 0

Acetonitrile-based electrolytes for lithium-ion battery application 锂离子电池用乙腈基电解质

Q4 Energy

Current Topics in Electrochemistry

Pub Date : 2018-12-31 DOI: 10.31300/CTEC.20.2018.1-13

P. Hilbig, L. Ibing, B. Streipert, R. Wagner, M. Winter, I. Cekic‐Laskovic

Compared to the commercially used state-of-the art non-aqueous organic carbonate solvent-based electrolytes, acetonitrile (AN)-based electrolytes have the advantage of enabling higher conductivity and lower viscosity values. The beneficial influence of adding fluoroethylene carbonate (FEC), thus enabling AN compatibility with graphite anodes, in different ratios to AN-based electrolytes represents the main focus of this manuscript. Long-term cycling measurements at 0 °C and 20 °C as well as conductivity and electrochemical stability measurements were performed to identify the optimal AN:FEC ratio. The electrochemical performance as well as the decomposition products were further investigated in graphite/lithium iron phosphate (LFP) cells to validate the applicability in lithium-ion cells.

与商业上使用的最先进的非水有机碳酸盐溶剂电解质相比，乙腈(AN)电解质具有更高的导电性和更低的粘度值的优势。添加氟乙烯碳酸酯(FEC)的有益影响，从而使AN与石墨阳极的相容性，以不同比例的AN基电解质代表了这篇论文的主要重点。在0°C和20°C下进行长期循环测量，以及电导率和电化学稳定性测量，以确定最佳AN:FEC比。在石墨/磷酸铁锂(LFP)电池中进一步研究了其电化学性能和分解产物，以验证其在锂离子电池中的适用性。

引用次数: 7

Electrochemical study on the corrosion resistance of plasma nanocoated 316L stainless steel in albumin- and lysozyme-containing electrolytes. 等离子纳米涂层 316L 不锈钢在含白蛋白和溶菌酶电解质中的耐腐蚀性电化学研究。

Q4 Energy

Current Topics in Electrochemistry

Pub Date : 2017-01-01

John Eric Jones, Meng Chen, Ju Chou, Qingsong Yu

The physiological corrosion resistance of plasma nanocoated 316L stainless steel was studied in protein-containing electrolytes using electrochemical methods. Plasma nanocoatings with thicknesses of 20-30 nm were deposited onto 316L stainless steel coupons in a glow discharge of trimethylsilane (TMS) or its mixture with oxygen gas under various gas ratios. The surface chemistries of the plasma nanocoatings were characterized using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Corrosion properties of the plasma nanocoated 316L stainless steel coupons were assessed using potentiodynamic polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) in phosphate-buffered saline (PBS) electrolytes that contain bovine serum albumin (BSA) or lysozyme. It was found that BSA adsorption on the plasma nanocoated 316L coupons was heavily favored. BSA adsorption on the plasma nanocoating surfaces could block charge-transfer reactions between the electrolyte and 316L substrate, and thus stabilize the 316L substrates from further corrosion. In contrast, lysozyme adsorption on the plasma nanocoated specimens was not as pronounced and mildly influenced the corrosion properties of the plasma nanocoated 316L stainless steel.

采用电化学方法研究了等离子纳米涂层 316L 不锈钢在含蛋白质电解质中的耐生理腐蚀性。在三甲基硅烷（TMS）或其与氧气的混合气体的辉光放电中，在不同气体比例下将厚度为 20-30 纳米的等离子纳米涂层沉积到 316L 不锈钢试样上。利用傅立叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）对等离子纳米涂层的表面化学性质进行了表征。在含有牛血清白蛋白（BSA）或溶菌酶的磷酸盐缓冲盐水（PBS）电解液中，使用电位极化、循环伏安法（CV）和电化学阻抗谱（EIS）评估了等离子纳米涂层 316L 不锈钢试样的腐蚀特性。结果发现，等离子体纳米涂层 316L 试样上的 BSA 吸附效果很好。BSA 吸附在等离子体纳米涂层表面可以阻止电解质和 316L 基材之间的电荷转移反应，从而稳定 316L 基材，防止其进一步腐蚀。相比之下，溶菌酶在等离子纳米涂层试样上的吸附并不明显，对等离子纳米涂层 316L 不锈钢的腐蚀性能影响较小。

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