通过热解多聚多巴胺调节纸基碳电极的化学和电化学性质

IF 4.6 Q1 CHEMISTRY, ANALYTICAL ACS Measurement Science Au Pub Date : 2023-12-15 DOI:10.1021/acsmeasuresciau.3c00063
Jaqueline F. Rocha, Julia C. de Oliveira, Jefferson Bettini, Mathias Strauss, Guilherme S. Selmi, Anderson K. Okazaki, Rafael F. de Oliveira, Renato S. Lima and Murilo Santhiago*, 
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引用次数: 0

摘要

基于电化学纸的分析设备是便携式、低成本、经济实惠和分散诊断的重要平台。在这类应用中,化学功能化起着关键作用,可通过调整电极的表面特性和面积来确保高临床性能。然而,通过单一的功能化途径来控制电极的不同表面特性仍具有挑战性。在这项工作中,我们尝试通过在不同温度下对聚多巴胺(PDA)进行热处理来调节碳纸基器件的润湿性、化学成分和电活性面积。在热解纸(PP)电极上沉积 PDA 薄膜,并在 300-1000 °C 范围内进行热处理。PDA 沉积后,表面富含氮和氧,具有超亲水性和较高的电活性面积。随着温度的升高,表面变得疏水,电活性面积减小。拉曼、X 射线光电子显微镜(XPS)、激光扫描共聚焦显微镜(LSCM)、接触角、扫描电子显微镜(SEM-EDS)、电学测量、透射电子显微镜(TEM)和电化学实验对表面改性进行了跟踪研究。此外,氮物种的化学成分也可以在表面进行调整。作为概念验证,我们使用 PDA 处理过的表面来锚定 [AuCl4]- 离子。电化学还原后,我们观察到可以控制表面纳米粒子的大小。我们的方法开辟了一条新途径,为纸基电化学生物传感器领域的电化学界面增添了多功能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Tuning the Chemical and Electrochemical Properties of Paper-Based Carbon Electrodes by Pyrolysis of Polydopamine

Electrochemical paper-based analytical devices represent an important platform for portable, low-cost, affordable, and decentralized diagnostics. For this kind of application, chemical functionalization plays a pivotal role to ensure high clinical performance by tuning surface properties and the area of electrodes. However, controlling different surface properties of electrodes by using a single functionalization route is still challenging. In this work, we attempted to tune the wettability, chemical composition, and electroactive area of carbon-paper-based devices by thermally treating polydopamine (PDA) at different temperatures. PDA films were deposited onto pyrolyzed paper (PP) electrodes and thermally treated in the range of 300–1000 °C. After deposition of PDA, the surface is rich in nitrogen and oxygen, it is superhydrophilic, and it has a high electroactive area. As the temperature increases, the surface becomes hydrophobic, and the electroactive area decreases. The surface modifications were followed by Raman, X-ray photoelectron microscopy (XPS), laser scanning confocal microscopy (LSCM), contact angle, scanning electron microscopy (SEM-EDS), electrical measurements, transmission electron microscopy (TEM), and electrochemical experiments. In addition, the chemical composition of nitrogen species can be tuned on the surface. As a proof of concept, we employed PDA-treated surfaces to anchor [AuCl4] ions. After electrochemical reduction, we observed that it is possible to control the size of the nanoparticles on the surface. Our route opens a new avenue to add versatility to electrochemical interfaces in the field of paper-based electrochemical biosensors.

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来源期刊
ACS Measurement Science Au
ACS Measurement Science Au 化学计量学-
CiteScore
5.20
自引率
0.00%
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0
期刊介绍: ACS Measurement Science Au is an open access journal that publishes experimental computational or theoretical research in all areas of chemical measurement science. Short letters comprehensive articles reviews and perspectives are welcome on topics that report on any phase of analytical operations including sampling measurement and data analysis. This includes:Chemical Reactions and SelectivityChemometrics and Data ProcessingElectrochemistryElemental and Molecular CharacterizationImagingInstrumentationMass SpectrometryMicroscale and Nanoscale systemsOmics (Genomics Proteomics Metabonomics Metabolomics and Bioinformatics)Sensors and Sensing (Biosensors Chemical Sensors Gas Sensors Intracellular Sensors Single-Molecule Sensors Cell Chips Arrays Microfluidic Devices)SeparationsSpectroscopySurface analysisPapers dealing with established methods need to offer a significantly improved original application of the method.
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