Enhancement of ZnO-rGO nanocomposite thin films by gamma radiation for E. coli sensor

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The fabricated E. coli sensor of ZnO-rGO nanocomposite thin films by gamma radiation was investigated. Nanocomposite films were prepared via sol–gel method and were irradiated at 10 kGy at room temperature. The surface characteristic of as-prepared samples have been characterized by x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The proposed structure shows that exposed gamma radiation may change the microstructure of the films occurs as a result of their flexible structure. Uv–vis spectra of nanocomposite were studied to investigate the optical behavior of ZnO-rGO films and the optical energy band gap and Urbach energy were found to be gamma dose dependent. The sensing properties were identified by measuring the changes of conductivity of film using I-V measurement. Upon exposure to E. coli, the radiated ZnO-rGO films (1.00 vol% GO) exhibited higher sensitivity, as much as 4.62 × 10−3, than un-radiated films, 1.04 × 10−3. This enhancement of the I-V response was attributed to a positive influence of the gamma radiation in these films. The results prove that our ZnO-rGO nanocomposites thin films by gamma radiation demonstrate a strong performance for the detection of microbiological organisms in water.

Original languageEnglish
Pages (from-to)1134-1143
Number of pages10
JournalApplied Surface Science
Volume392
DOIs
Publication statusPublished - 15 Jan 2017

Fingerprint

Nanocomposite films
Gamma rays
Escherichia coli
Thin films
Sensors
Flexible structures
Field emission
Band structure
Fourier transform infrared spectroscopy
Atomic force microscopy
Nanocomposites
Energy gap
Diffraction
X rays
Microstructure
Scanning electron microscopy
Water

Keywords

  • E. coli sensor
  • Gamma radiation
  • Thin films
  • ZnO-rGO nanocomposite

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Enhancement of ZnO-rGO nanocomposite thin films by gamma radiation for E. coli sensor. / Noor Azmy, Noor Azwen; A Bakar, Ahmad Ashrif; Arsad, Norhana; Idris, Sarada; Mohmad, Abdul Rahman; Abdul Hamid, Aidil.

In: Applied Surface Science, Vol. 392, 15.01.2017, p. 1134-1143.

Research output: Contribution to journalArticle

@article{af44a0c849a14b33ad9a9664d817a466,
title = "Enhancement of ZnO-rGO nanocomposite thin films by gamma radiation for E. coli sensor",
abstract = "The fabricated E. coli sensor of ZnO-rGO nanocomposite thin films by gamma radiation was investigated. Nanocomposite films were prepared via sol–gel method and were irradiated at 10 kGy at room temperature. The surface characteristic of as-prepared samples have been characterized by x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The proposed structure shows that exposed gamma radiation may change the microstructure of the films occurs as a result of their flexible structure. Uv–vis spectra of nanocomposite were studied to investigate the optical behavior of ZnO-rGO films and the optical energy band gap and Urbach energy were found to be gamma dose dependent. The sensing properties were identified by measuring the changes of conductivity of film using I-V measurement. Upon exposure to E. coli, the radiated ZnO-rGO films (1.00 vol{\%} GO) exhibited higher sensitivity, as much as 4.62 × 10−3, than un-radiated films, 1.04 × 10−3. This enhancement of the I-V response was attributed to a positive influence of the gamma radiation in these films. The results prove that our ZnO-rGO nanocomposites thin films by gamma radiation demonstrate a strong performance for the detection of microbiological organisms in water.",
keywords = "E. coli sensor, Gamma radiation, Thin films, ZnO-rGO nanocomposite",
author = "{Noor Azmy}, {Noor Azwen} and {A Bakar}, {Ahmad Ashrif} and Norhana Arsad and Sarada Idris and Mohmad, {Abdul Rahman} and {Abdul Hamid}, Aidil",
year = "2017",
month = "1",
day = "15",
doi = "10.1016/j.apsusc.2016.09.144",
language = "English",
volume = "392",
pages = "1134--1143",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",

}

TY - JOUR

T1 - Enhancement of ZnO-rGO nanocomposite thin films by gamma radiation for E. coli sensor

AU - Noor Azmy, Noor Azwen

AU - A Bakar, Ahmad Ashrif

AU - Arsad, Norhana

AU - Idris, Sarada

AU - Mohmad, Abdul Rahman

AU - Abdul Hamid, Aidil

PY - 2017/1/15

Y1 - 2017/1/15

N2 - The fabricated E. coli sensor of ZnO-rGO nanocomposite thin films by gamma radiation was investigated. Nanocomposite films were prepared via sol–gel method and were irradiated at 10 kGy at room temperature. The surface characteristic of as-prepared samples have been characterized by x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The proposed structure shows that exposed gamma radiation may change the microstructure of the films occurs as a result of their flexible structure. Uv–vis spectra of nanocomposite were studied to investigate the optical behavior of ZnO-rGO films and the optical energy band gap and Urbach energy were found to be gamma dose dependent. The sensing properties were identified by measuring the changes of conductivity of film using I-V measurement. Upon exposure to E. coli, the radiated ZnO-rGO films (1.00 vol% GO) exhibited higher sensitivity, as much as 4.62 × 10−3, than un-radiated films, 1.04 × 10−3. This enhancement of the I-V response was attributed to a positive influence of the gamma radiation in these films. The results prove that our ZnO-rGO nanocomposites thin films by gamma radiation demonstrate a strong performance for the detection of microbiological organisms in water.

AB - The fabricated E. coli sensor of ZnO-rGO nanocomposite thin films by gamma radiation was investigated. Nanocomposite films were prepared via sol–gel method and were irradiated at 10 kGy at room temperature. The surface characteristic of as-prepared samples have been characterized by x-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The proposed structure shows that exposed gamma radiation may change the microstructure of the films occurs as a result of their flexible structure. Uv–vis spectra of nanocomposite were studied to investigate the optical behavior of ZnO-rGO films and the optical energy band gap and Urbach energy were found to be gamma dose dependent. The sensing properties were identified by measuring the changes of conductivity of film using I-V measurement. Upon exposure to E. coli, the radiated ZnO-rGO films (1.00 vol% GO) exhibited higher sensitivity, as much as 4.62 × 10−3, than un-radiated films, 1.04 × 10−3. This enhancement of the I-V response was attributed to a positive influence of the gamma radiation in these films. The results prove that our ZnO-rGO nanocomposites thin films by gamma radiation demonstrate a strong performance for the detection of microbiological organisms in water.

KW - E. coli sensor

KW - Gamma radiation

KW - Thin films

KW - ZnO-rGO nanocomposite

UR - http://www.scopus.com/inward/record.url?scp=84989348645&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84989348645&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2016.09.144

DO - 10.1016/j.apsusc.2016.09.144

M3 - Article

AN - SCOPUS:84989348645

VL - 392

SP - 1134

EP - 1143

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -