Reversible P-N transition sensing behavior obtained by applying GQDs/Pt decorated SnO2 thin films at room temperature

Shao, Shaofeng; Liu, Bin; Jiang, Fan; Wu, Hongyan and Köhn, Ralf (2016): Reversible P-N transition sensing behavior obtained by applying GQDs/Pt decorated SnO2 thin films at room temperature. In: Rsc Advances, Vol. 6, No. 100: pp. 98317-98324

Abstract

In this work, a GQDs/Pt decorated nanoporous SnO2 thin film with high crystallinity and nanostructure ordering is firstly fabricated in situ on a sensor device using water vapor hydrothermal treatment which then acted as an excellent acetone chemiresistor. Intriguingly, the nanoporous SnO2 thin film displays a regular change of sensing behavior with reversible transition from p-to n-type sensing as a function of acetone concentration (AC) and GQD content (GC) at room temperature. An AC-GC transition diagram has been created in terms of the gas sensing response. Accordingly, this will be a promising way to finding a versatile sensor system, by the precise control of the GQDs content on the SnO2 surface. The mechanism deriving from the acetone sensing transitions points out the nature of the materials.

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• ISSN: 2046-2069
• Language: English