用于高性能室温乙醇传感的金修饰垂直排列碳纳米纤维

Gold-decorated vertically aligned carbon nanofibers for high-performance room-temperature ethanol sensing.

作者信息

Shooshtari Mostafa

机构信息

Neuromorphic Group, Institute of Microelectronics of Seville IMSE-CNM, 28. Parque Científico y Tecnológico Cartuja, Sevilla, 41092, Spain.

Department of Microelectronics, Delft University of Technology, Feldmannweg 17, Delft, 2628 CT, the Netherlands.

出版信息

Mikrochim Acta. 2025 Jul 24;192(8):517. doi: 10.1007/s00604-025-07367-8.

DOI:10.1007/s00604-025-07367-8

PMID:40702233

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12287182/

Abstract

Room-temperature detection of volatile organic compounds (VOCs) is a persistent challenge for low-power sensing applications. This study presents a scalable method for fabricating gas sensors based on vertically aligned carbon nanofibers (VACNFs) decorated with aerosol-printed gold nanoparticles (Au NPs). The Au-functionalized CNFs show ~ 140% improvement in response at 10 ppm ethanol gas, reduced ~ 5-s response time, and enhanced stability with over 95% signal retention. These improvements are attributed to increased surface area, enhanced graphitic disorder, and the catalytic activity of Au NPs. Structural and morphological characterization using TEM, EDX, SEM, and Raman spectroscopy confirms the successful decoration of CNFs with Au. The effects of operating temperature and humidity on sensor performance are also evaluated.

摘要

室温下挥发性有机化合物（VOCs）的检测对于低功耗传感应用而言一直是一项挑战。本研究提出了一种可扩展的方法，用于制造基于垂直排列的碳纳米纤维（VACNFs）的气体传感器，这些碳纳米纤维上装饰有气溶胶印刷的金纳米颗粒（Au NPs）。金功能化的碳纳米纤维在10 ppm乙醇气体中的响应提高了约140%，响应时间缩短了约5秒，并增强了稳定性，信号保留率超过95%。这些改进归因于表面积增加、石墨化无序增强以及金纳米颗粒的催化活性。使用透射电子显微镜（TEM）、能量散射X射线光谱（EDX）、扫描电子显微镜（SEM）和拉曼光谱进行的结构和形态表征证实了金成功地装饰在了碳纳米纤维上。还评估了工作温度和湿度对传感器性能的影响。