Optical Humidity Sensing Characteristics of Ag-Polyaniline Nanocomposite

Author

Fuke, Madhavi V. ; Vijayan, Anu ; Kanitkar, Prajakta ; Aiyer, R.C.

Author_Institution

Dept. of Phys., Univ. of Pune, Pune

Volume

9

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

648

Lastpage

653

Abstract

Optical transmission type humidity sensor is fabricated using spin coated films of Ag-Polyaniline nanocomposite. The material is coated layer-by-layer to get films of various thicknesses (20-40 mum). Relative humidity (RH) was generated by the standard two temperature method from 15 to 100% RH. The sensor shows quick response of 7 s and a fast recovery time of 50 s with better sensitivity for higher thickness. The Ag-Polyaniline nanocomposite is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Visible spectroscopy (UV), and Fourier Transform infrared spectroscopy (FTIR). The repeatability and cycle to cycle variation is studied and found to be encouraging.

Keywords

humidity sensors; nanocomposites; optical sensors; spin coating; Fourier Transform infrared spectroscopy; UV-Visible spectroscopy; X-ray diffraction; nanocomposite; optical humidity sensing characteristics; relative humidity; scanning electron microscopy; size 20 mum to 40 mum; spin coated film; standard two temperature method; Humidity; Optical films; Optical materials; Optical sensors; Scanning electron microscopy; Sensor phenomena and characterization; Spectroscopy; Temperature sensors; X-ray diffraction; X-ray scattering; Ag-Polyaniline nanocomposite; optical sensor; relative humidity;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2009.2020662

Filename

4897233