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- Title
RGO/SiNW hybrid nanostructure developed on Si chip for enhanced and selective detection of acetone.
- Authors
Kumar, Avshish; Gautam, Varsha; Verma, Abhishek; Madhwal, Devinder; Jain, Vinod Kumar
- Abstract
In this work, we present a novel portable sensing device developed on a silicon chip using reduced graphene oxide (RGO) and vertically aligned silicon nanowires (SiNWs) for enhanced and selective detection of acetone. Various characterization techniques were used to confirm the successful preparation of RGO/VA-SiNWs/Si-chip hybrid nanostructure. These techniques include scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy. The prepared hybrid nanostructure was used to develop a sensor, and its gas sensing characteristics were thoroughly studied under different concentrations (0.1, 0.5 and 1 ppm) at room temperature. Compared with a pristine RGO-based sensor, the prepared hybrid nanostructure-based sensing device revealed a significantly enhanced response of approximately 40% under the exposure of 0.1 ppm concentration of acetone. The fast response/recovery time (5 s/12 s, respectively, at 0.1 ppm concentration), high reproducibility, and stability make it an ideal portable sensing device. The enhanced response at this low concentration could be attributed to the synergic effect of RGO with SiNWs and maximum adsorption of acetone due to high specific surface area, as well as strong interface adhesion at the surface of the developed hybrid nanostructure.
- Subjects
ACETONE; SILICON nanowires; TRANSMISSION electron microscopy; GRAPHENE oxide; SCANNING electron microscopy; RAMAN spectroscopy
- Publication
Journal of Nanoparticle Research, 2024, Vol 26, Issue 3, p1
- ISSN
1388-0764
- Publication type
Academic Journal
- DOI
10.1007/s11051-024-05962-z