Optical and electrical characteristics of acid-doped thin polyaniline films

Conjugated conducting polymers, such as polypyrrole (PPY), polyaniline (PANI), and polythiophene (PT), are the most interesting conducting polymers due to their excellent chemical and electrochemical stability. In this work, three samples of thin PANI films were synthesized by chemical oxidative pol...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Paul-Nwokocha, O., Ozuomba, J.
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2017
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/01bae2a72fde40949196a93716ff06c5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:01bae2a72fde40949196a93716ff06c5
record_format	dspace
spelling	oai:doaj.org-article:01bae2a72fde40949196a93716ff06c52021-11-21T11:56:51ZOptical and electrical characteristics of acid-doped thin polyaniline films537.6212537-63651810-648Xhttps://doaj.org/article/01bae2a72fde40949196a93716ff06c52017-12-01T00:00:00Zhttps://mjps.nanotech.md/archive/2017/article/71493https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365Conjugated conducting polymers, such as polypyrrole (PPY), polyaniline (PANI), and polythiophene (PT), are the most interesting conducting polymers due to their excellent chemical and electrochemical stability. In this work, three samples of thin PANI films were synthesized by chemical oxidative polymerization of aniline in the presence of hydrochloric acid using ammonium peroxydisulfate as an oxidizing agent. Two samples of the synthesized thin PANI films were doped with tetraoxosulphate(VI) acid (H2SO4) and citric acid, while the third sample was left undoped to serve as a control. We used a VeecoDektak 150 profiler to measure the film thickness; a UV-Visible spectrometer Shimadzu UV-1601 was used to determine the optical absorption spectra of the films. The measurement of DC conductivities was accomplished through the four-point probe technique with a Signatone V3.7 QuadPro resistance mapping system using a Keithley 2400 source meter. The thin films were found to be of the same thickness (0.2 μm); their absorption spectra revealed two absorption peaks at around 300 and 650 nm for the pure and citric acid-doped samples, while the H2SO4-doped PANI exhibited peaks at 300 and 880 nm. Doping reduced the direct band gap of the PANI from 2.75 to 2.4 eV. In addition, the results obtained from electrical characterization revealed that the H2SO4-doped PANI has the best conductivity among the doped samples, while the pure sample showed no value for electrical conductivity.Paul-Nwokocha, O.Ozuomba, J.D.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 16, Iss 3-4, Pp 227-233 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Paul-Nwokocha, O. Ozuomba, J. Optical and electrical characteristics of acid-doped thin polyaniline films
description	Conjugated conducting polymers, such as polypyrrole (PPY), polyaniline (PANI), and polythiophene (PT), are the most interesting conducting polymers due to their excellent chemical and electrochemical stability. In this work, three samples of thin PANI films were synthesized by chemical oxidative polymerization of aniline in the presence of hydrochloric acid using ammonium peroxydisulfate as an oxidizing agent. Two samples of the synthesized thin PANI films were doped with tetraoxosulphate(VI) acid (H2SO4) and citric acid, while the third sample was left undoped to serve as a control. We used a VeecoDektak 150 profiler to measure the film thickness; a UV-Visible spectrometer Shimadzu UV-1601 was used to determine the optical absorption spectra of the films. The measurement of DC conductivities was accomplished through the four-point probe technique with a Signatone V3.7 QuadPro resistance mapping system using a Keithley 2400 source meter. The thin films were found to be of the same thickness (0.2 μm); their absorption spectra revealed two absorption peaks at around 300 and 650 nm for the pure and citric acid-doped samples, while the H2SO4-doped PANI exhibited peaks at 300 and 880 nm. Doping reduced the direct band gap of the PANI from 2.75 to 2.4 eV. In addition, the results obtained from electrical characterization revealed that the H2SO4-doped PANI has the best conductivity among the doped samples, while the pure sample showed no value for electrical conductivity.
format	article
author	Paul-Nwokocha, O. Ozuomba, J.
author_facet	Paul-Nwokocha, O. Ozuomba, J.
author_sort	Paul-Nwokocha, O.
title	Optical and electrical characteristics of acid-doped thin polyaniline films
title_short	Optical and electrical characteristics of acid-doped thin polyaniline films
title_full	Optical and electrical characteristics of acid-doped thin polyaniline films
title_fullStr	Optical and electrical characteristics of acid-doped thin polyaniline films
title_full_unstemmed	Optical and electrical characteristics of acid-doped thin polyaniline films
title_sort	optical and electrical characteristics of acid-doped thin polyaniline films
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2017
url	https://doaj.org/article/01bae2a72fde40949196a93716ff06c5
work_keys_str_mv	AT paulnwokochao opticalandelectricalcharacteristicsofaciddopedthinpolyanilinefilms AT ozuombaj opticalandelectricalcharacteristicsofaciddopedthinpolyanilinefilms
_version_	1718419342807269376

Optical and electrical characteristics of acid-doped thin polyaniline films

Ejemplares similares