Enhancing humidity sensing performance of polyaniline/water soluble graphene oxide composite.

Graphene oxide Humidity sensing response Mechanical mixing Polyaniline composites Response and recovery time Stability

Journal

Talanta
ISSN: 1873-3573
Titre abrégé: Talanta
Pays: Netherlands
ID NLM: 2984816R

Informations de publication

Date de publication:
01 May 2019
Historique:
received: 27 10 2018
revised: 14 12 2018
accepted: 21 12 2018
entrez: 27 1 2019
pubmed: 27 1 2019
medline: 27 1 2019
Statut: ppublish

Résumé

The humidity sensing performance of Polyaniline/Water soluble graphene oxide [PWGO] composites have been presented in this work. Various mass ratios of Water soluble graphene oxide [WGO] were mechanically mixed with Polyaniline [PANI] prepared by in-situ polymerization process to form PANI / WGO composites. For the purpose of humidity sensing studies, the samples were structurally characterized by FTIR, Raman, XRD, SEM and TEM techniques and comparatively analyzed. The film of the samples prepared by deposition on ordinary glass substrate using cost effective spin coating technique were tested for their humidity sensing performance in the relative humidity (RH) range of 11-97%. Of the four composites studied, the PWGO-4 composite recorded a good response time of 8 s and a recovery time of 9 s and a very low humidity hysteresis. The mechanism for sensing has been explained on the basis of three sequential steps: chemisorption, physisorption and condensation process. The humidity sensing stability of the composites were tested over a period of 2 months.

Identifiants

DOI: 10.1016/j.talanta.2018.12.072 PMID: 30683373
pubmed: 30683373
pii: S0039-9140(18)31339-0
doi: 10.1016/j.talanta.2018.12.072
pii:
doi:

Types de publication

Journal Article

Langues

eng

Pagination

337-344

Informations de copyright

Copyright © 2018 Elsevier B.V. All rights reserved.

Auteurs

B Chethan (B)

Department of Physics, Research center, JNN College of Engineering, Shivamogga, Karnataka, India.

H G Raj Prakash (HG)

Department of Physics, Research center, JNN College of Engineering, Shivamogga, Karnataka, India.

Y T Ravikiran (YT)

Department of PG Studies and Research in Physics, Government Science College, Chitradurga, Karnataka, India. Electronic address: ytrcta@gmail.com.

S C Vijayakumari (SC)

Department of Physics, SJM College of Arts, Science and Commerce, Chitradurga, Karnataka, India.

Ch V V Ramana (CVV)

Department of Electronic Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin 17104, Republic of Korea; Department of Electrical and Electronics Engineering Science, University of Johannesburg, Auckland park Campus, Johannesburg 2006, South Africa.

S Thomas (S)

International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala, India.

Daewon Kim (D)

Department of Electronic Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin 17104, Republic of Korea. Electronic address: daewon@khu.ac.kr.

Classifications MeSH