Investigation of polypyrrole deposition time on QCM sensitivity as aspergillus niger spore sensor

IF 4.1 Q1 CHEMISTRY, ANALYTICAL
Yudyanto , Masruroh , Dionysius J.D.H. Santjojo , Arinto Yudi Ponco Wardoyo
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Abstract

The receptor layer on Quartz Crystal Microbalance (QCM) is vital in capturing analytes. We investigated how the morphology of the layer produced from polypyrrole (PPy) evaporated by vacuum thermal evaporator technique with varying deposition time on the porosity, wettability, and sensitivity of QCM as a sensor for Aspergillus niger (A. niger) spores. The morphology of the layer was observed using a Field Emission Scanning Electron Microscope (FESEM), porosity was taken from the results of the layer morphology analysis, wettability was taken from the measurement of the water contact angle with the layer surface, and sensitivity was obtained from the average gradient of the curve during changes in measurement frequency. The results show significant changes in these parameters with increasing deposition time. The morphology of the layer changes and the dimensions of the width and height of the platelets increase so that larger empty spaces between the platelets are created. Porosity increases from 56.43 to 71.11 % along with increasing deposition time from 10 to 50 s, and wettability also increases, which is marked by a decrease in the water contact angle from 51.49 to 30.83°. Sensitivity increases from 18.6 to 89.6 Hz/s due to the larger contact surface between the layer surface and the spores. The results of this study can be used as a reference in developing the addition of other materials with PPy matrix materials for appropriate analyte substances.

Abstract Image

聚吡咯沉积时间对QCM作为黑曲霉孢子传感器灵敏度的影响
石英晶体微天平(QCM)上的受体层对捕获分析物至关重要。本研究采用真空热蒸发器技术,研究了不同沉积时间下聚吡咯(PPy)蒸发层的形态对聚吡咯(PPy)作为黑曲霉(Aspergillus niger)孢子传感器的孔隙度、润湿性和灵敏度的影响。利用场发射扫描电镜(FESEM)观察层的形貌,从层的形貌分析结果中获得孔隙度,从测量层表面的水接触角中获得润湿性,并从测量频率变化时曲线的平均梯度中获得灵敏度。结果表明,随着沉积时间的延长,这些参数发生了显著的变化。层的形态发生变化,血小板的宽度和高度的尺寸增加,从而在血小板之间产生更大的空白空间。随着沉积时间从10 s增加到50 s,孔隙度从56.43%增加到71.11%,润湿性也有所增加,主要表现为水接触角从51.49°减小到30.83°。由于层表面与孢子之间的接触面较大,灵敏度从18.6 Hz/s增加到89.6 Hz/s。本研究结果可为开发以PPy为基体材料添加其他材料以获得合适的分析物质提供参考。
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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来源期刊
Talanta Open
Talanta Open Chemistry-Analytical Chemistry
CiteScore
5.20
自引率
0.00%
发文量
86
审稿时长
49 days
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