PANI-Ag-Cu nanocomposite thin films based impedimetric microbial sensor for detection of E. coli bacteria

Huda Abdullah, Norshafadzila Mohammad Naim, Noor Azwen Noor Azmy, Aidil Abdul Hamid

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

PANI-Ag-Cu nanocomposite thin films were prepared by sol-gel method and deposited on the glass substrate using spin coating technique. Polyaniline was synthesized by chemical oxidative polymerization of aniline monomer in the presence of nitric acid. The films were characterized using XRD, FTIR, and UV-Visible spectroscopy. The performance of the sensor was conducted using electrochemical impedance spectroscopy to obtain the change in impedance of the sensor film before and after incubation with E. coli bacteria in water. The peaks in XRD pattern confirm the presence of Ag and Cu nanoparticles in face-centered cubic structure. FTIR analysis shows the stretching of N-H in the polyaniline structure. The absorption band from UV-Visible spectroscopy shows high peaks between 400 nm and 500 nm which indicate the presence of Ag and Cu nanoparticles, respectively. Impedance analysis indicates that the change in impedance of the films decreases with the presence of E. coli. The sensitivity on E. coli increases for the sample with high concentration of Cu.

Original languageEnglish
Article number951640
JournalJournal of Nanomaterials
Volume2014
DOIs
Publication statusPublished - 2014

Fingerprint

Nanocomposite films
Escherichia coli
Bacteria
Polyaniline
Thin films
Sensors
Spectroscopy
Nanoparticles
Nitric Acid
Coating techniques
Spin coating
Aniline
Nitric acid
Electrochemical impedance spectroscopy
Sol-gel process
Stretching
Absorption spectra
Monomers
Polymerization
Glass

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

PANI-Ag-Cu nanocomposite thin films based impedimetric microbial sensor for detection of E. coli bacteria. / Abdullah, Huda; Mohammad Naim, Norshafadzila; Noor Azmy, Noor Azwen; Abdul Hamid, Aidil.

In: Journal of Nanomaterials, Vol. 2014, 951640, 2014.

Research output: Contribution to journalArticle

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