Atmospheric Plasma Treatment Enhances the Biosensing Properties of Graphene Oxide-Silver Nanoparticle Composite
Atmospheric Plasma Treatment Enhances the Biosensing Properties of Graphene Oxide-Silver Nanoparticle Composite
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DOI：
10.1149/2.0161909jes
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发表时间：
2019
影响因子：
3.9
通讯作者：
Apurva Sonawane;M. Mujawar;S. Bhansali
中科院分区：
文献类型：
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作者：
Apurva Sonawane;M. Mujawar;S. Bhansali
本工作提出了一种方法来定制的氧化石墨烯-银纳米粒子（GO-AgNPs）复合材料的性能，使用室温常压等离子体处理。特别是，氧化石墨烯-银纳米颗粒复合材料（GO-AgNPs）的雾化沉积，在室温下快速还原GO，和AgNPs表面激发在这项工作中进行了研究。气溶胶化的GO的等离子体处理导致还原的氧化石墨烯（rGO）形成，这从拉曼光谱中的D与G带比从GO的0.65增加到rGO的1.2中观察到。扫描电子显微镜、透射电子显微镜和选区电子衍射图谱表明等离子体处理导致了形貌的变化，电化学阻抗谱结果表明rGO-AgNP复合材料的导电性得到了改善。为了证明该技术的有效性，等离子体处理的GO和银纳米颗粒（AgNP）复合物用于商业丝网印刷电极的电极表面改性，用于皮质醇检测。循环伏安法检测皮质醇的结果表明，等离子体处理后，表面修饰艾德电极的灵敏度提高。这种室温大气等离子体退火技术对于在柔性表面上快速处理纳米颗粒而不使其经受高温具有特殊意义。在室温下成功地证明了通过等离子体处理的GO还原。表面等离子体共振（SPR）、表面增强拉曼（Sers）和循环伏安（CV）的结果表明，在等离子体处理过程中，氧化石墨烯表面的氧物种减少。在等离子体处理的GO和rGO-AgNP复合物中观察到电导率的增强。等离子体处理诱导改性艾德电极的电灵敏度增加。SEM和TEM图像显示了rGO-AgNPs复合物的形态变化，适合于有效的电化学检测。所提出的技术比其他热处理、化学还原技术和正在使用的庞大等离子体还原装置具有优势。此外，这种方法提供了一种方法，在传感器的制作朝着即兴的电化学响应的生物分子检测。所需的材料沉积和等离子体处理可以在柔性基底上实现，用于各种应用，如电化学传感器、超级电容器、电池和POC系统。
This work presents an approach to tailor the properties of the graphene oxide- silver nanoparticle (GO-AgNPs) composite using room temperature atmospheric plasma treatment. In particular, the aerosolized deposition of graphene oxide-silver nanoparticle composite (GO-AgNPs), the rapid reduction of GO at room temperature, and AgNPs surface excitation are investigated in this work. The plasma treatment of aerosolized GO leads to the reduced graphene oxide (rGO) formation which is observed from the increase in D to G band ratio from 0.65 for GO to 1.2 for rGO in the Raman spectra. Scanning Electron Microscopy, Transmission Electron Microscopy, and Selected Area Electron Diffraction patterns show that the plasma treatment leads to the morphological changes and the Electrochemical Impedance spectroscopy results show the improvement in the conductivity of the rGO-AgNP composite. To demonstrate the efficacy of the technique, plasma treated GO and silver nanoparticles (AgNPs) composite is used for the electrode surface modification of the commercial screen-printed electrodes for the cortisol detection. The cyclic voltammetry scans to detect cortisol shows that the sensitivity of the surface modified electrodes is increased after plasma treatment. This room temperature atmospheric plasma annealing technique is of specific interest for rapid processing of nanoparticles on flexible surfaces without subjecting them to elevated temperatures. The GO reduction by plasma treatment is successfully demon- strated at room temperature. The SPR, SERS and CV results showed that during plasma treatment, the oxygen species at the surface of GO are reduced. The enhancement in the electrical conductivity was observed in plasma treated GO and rGO-AgNPs composite. The plasma treatment induced the increase in the electrical sensitivity of the modified electrodes. The SEM and TEM images showed the change in morphology of rGO-AgNPs composite, suitable for effective electrochemical detection. The proposed technique has advantages over other thermal processing, chemical reduction techniques, and bulky plasma reduction setups that are being used. In addition, this method offers the approach in sensor fabrication toward improvising the electrochemical response of biomolecule detection. The desired material deposi- tion and plasma treatment can be achieved on the flexible substrates for various applications as electrochemical sensors, supercapacitors, batteries, and POC systems.