A highly sensitive safrole sensor based on polyvinyl acetate (PVAc) nanofiber-coated QCM

Author:

Triyana Kuwat,Rianjanu Aditya,Nugroho Doni Bowo,As’ari Ahmad Hasan,Kusumaatmaja Ahmad,Roto Roto,Suryana Risa,Wasisto Hutomo Suryo

Abstract

Abstract A novel, highly sensitive and selective safrole sensor has been developed using quartz crystal microbalance (QCM) coated with polyvinyl acetate (PVAc) nanofibers. The nanofibers were collected on the QCM sensing surface using an electrospinning method with an average diameter ranging from 612 nm to 698 nm and relatively high Q–factors (rigid coating). Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to analyze the PVAc nanofiber surface morphology, confirming its high surface area and roughness, which are beneficial in improving the sensor sensitivity compared to its thin-film counterpart. The as-spun PVAc nanofiber sensor could demonstrate a safrole limit of detection (LOD) of down to 0.7 ppm with a response time of 171 s and a sensitivity of 1.866 Hz/ppm. It also showed good reproducibility, rapid response time, and excellent recovery. Moreover, cross-interference of the QCM sensor response to non-target gases was investigated, yielding very low cross-sensitivity and high selectivity of the safrole sensor. Owing to its high robustness and low fabrication cost, this proposed sensing device is expected to be a promising alternative to classical instrumental analytical methods for monitoring safrole-based drug precursors.

Funder

Safari Club International Foundation, United States

Phoenix Zoo

University of California, Santa Barbara

National Science Foundation

National Science Foundation, United States

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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