Multi‐walled carbon nanotubes co‐doped with sulfur and nitrogen as sensors for the simultaneous electrochemical determination of biomolecules

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2024-11-30 DOI:10.1007/s10008-024-06157-1

Nikos G. Tsierkezos, Alexandra Karagianni, Eike Felix Reddmann, Uwe Ritter, David E. Sanchez, Mauricio Terrones, Konstantinos V. Kordatos

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Abstract

Multi-walled carbon nanotubes co-doped with sulfur and nitrogen (S–N-MWCNTs) were produced onto silicon/silicon oxide by means of chemical vapor deposition (CVD) upon decomposition of dimethyl sulfoxide (DMSO) and acetonitrile (ACN) in the presence of ferrocene (FeCp₂). The synthesized S–N-MWCNTs were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy, and electrochemical impedance spectroscopy (EIS). The electrochemical response of S–N-MWCNTs towards oxidation of ascorbic acid (AA), dopamine (DA), uric acid (UA), and glucose (GL) was investigated in phosphate buffer solution (PBS) (pH 7.4) by means of cyclic voltammetry (CV). Strong dependence of electrochemical quality of S–N-MWCNTs on the concentration of decomposed DMSO precursor was observed. Namely, upon increasing the percentage of decayed DMSO from 1.0 up to 2.0% wt., the electrocatalytic activity of S–N-MWCNTs tends to improve. The separations of oxidation waves between AA-DA, DA-UA, and AA-UA reached their maximum values on S–N-MWCNTs-3, fabricated upon decomposition of 2.0% wt. DMSO precursor, permitting their individual and simultaneous electrochemical determination. Strong interference of GL in the analysis of DA was observed, and consequently, simultaneous analysis of AA, DA, and UA can be only carried out in the absence of GL. A great influence of concentration of decomposed DMSO precursor on the sensitivity of S–N-MWCNTs was also observed. Specifically, upon increasing the percentage of decayed DMSO from 1.0 up to 2.0% wt., the sensitivity and detection capability of S–N-MWCNTs towards AA, DA, UA, and GL analytes tend to enhance.

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硫氮共掺杂多壁碳纳米管作为电化学同时测定生物分子的传感器

在二茂铁（FeCp2）存在的情况下，通过化学气相沉积（CVD）方法将二甲基亚砜（DMSO）和乙腈（ACN）分解，在硅/氧化硅上制备出硫和氮共掺杂的多壁碳纳米管（S-N-MWCNTs）。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）结合能量色散 X 射线光谱（EDX）、拉曼光谱和电化学阻抗光谱（EIS）对合成的 S-N-MWCNTs 进行了表征。通过循环伏安法（CV）研究了 S-N-MWCNTs 在磷酸盐缓冲溶液（PBS）（pH 7.4）中对抗坏血酸（AA）、多巴胺（DA）、尿酸（UA）和葡萄糖（GL）氧化的电化学响应。结果表明，S-N-MWCNTs 的电化学质量与分解的 DMSO 前体的浓度密切相关。也就是说，当分解 DMSO 的重量百分比从 1.0% 增加到 2.0% 时，S-N-MWCNTs 的电催化活性趋于提高。在分解 2.0% wt. DMSO 前体后制成的 S-N-MWCNTs-3 上，AA-DA、DA-UA 和 AA-UA 之间的氧化波分离达到了最大值。在分解 2.0% wt 的 DMSO 前驱体后制成的 S-N-MWCNTs-3 上，AA-DA、DA-UA 和 AA-UA 之间的氧化波达到了最大值，从而可以同时进行单独的电化学测定。观察到 GL 对 DA 分析的强烈干扰，因此只有在没有 GL 的情况下才能同时分析 AA、DA 和 UA。还观察到分解 DMSO 前体的浓度对 S-N-MWCNTs 的灵敏度有很大影响。具体来说，当分解 DMSO 的重量百分比从 1.0% 增加到 2.0% 时，S-N-MWCNTs 对 AA、DA、UA 和 GL 分析物的灵敏度和检测能力趋于增强。

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.