Light backscattering (e.g. reflectance) by ZnO nanorods on tips of plastic optical fibres with application for humidity and alcohol vapour sensing
Document Type
Article
Publication Date
1-1-2016
Abstract
Relative humidity and alcohol vapour sensing by light backscattering was demonstrated by zinc oxide (ZnO) nanorods grown on tips of plastic optical fibres. Synthesis of ZnO nanostructures was accomplished by the hydrothermal method. A new technique was proposed to extract the backscattered light by ZnO nanostructures. The system was shown experimentally to sense moisture and alcohol vapours. Three ranges of the visible spectrum blue (450-500 nm), green (500-570 nm) and red (610-700 nm) were studied in experiments. Spectral reflectance based on backscattering from ZnO surface structures was used to measure the amount of light backscattered by ZnO nanorods. Results showed that light in the red visible range of the spectrum had higher sensitivity and reflectivity compared with blue and green spectral ranges.
Keywords
Zinc compounds, Gas sensors, Humidity sensors, II-VI semiconductors, Light scattering, Liquid phase deposition, Nanofabrication, Nanorods, Semiconductor growth, Surface structure, Visible spectra, Wide band gap semiconductors
Divisions
fac_eng
Funders
Asian Institute of Technology,University of Malaya: High Impact Research Grant (grant no: D000009-16001)
Publication Title
Micro & Nano Letters
Volume
11
Issue
12
Publisher
Institution of Engineering and Technology