Rapid synthesis and decoration of reduced graphene oxide with gold nanoparticles by thermostable peptides for memory device and photothermal applications

Sachin V. Otari, Manoj Kumar, Muhammad Zahid Anwar, Nanasaheb D. Thorat, Sanjay K.S. Patel, Dongjin Lee, Jai Hyo Lee, Jung Kul Lee, Yun Chan Kang, Liaoyuan Zhang

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This article presents novel, rapid, and environmentally benign synthesis method for one-step reduction and decoration of graphene oxide with gold nanoparticles (NAuNPs) by using thermostable antimicrobial nisin peptides to form a gold-nanoparticles-reduced graphene oxide (NAu-rGO) nanocomposite. The formed composite material was characterized by UV/Vis spectroscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy (HR-TEM). HR-TEM analysis revealed the formation of spherical AuNPs of 5-30 nm in size on reduced graphene oxide (rGO) nanosheets. A non-volatile-memory device was prepared based on a solution-processed ZnO thin-film transistor fabricated by inserting the NAu-rGO nanocomposite in the gate dielectric stack as a charge trapping medium. The transfer characteristic of the ZnO thin-film transistor memory device showed large clockwise hysteresis behaviour because of charge carrier trapping in the NAu-rGO nanocomposite. Under positive and negative bias conditions, clear positive and negative threshold voltage shifts occurred, which were attributed to charge carrier trapping and de-trapping in the ZnO/NAu-rGO/SiO2 structure. Also, the photothermal effect of the NAu-rGO nanocomposites on MCF7 breast cancer cells caused inhibition of ~80% cells after irradiation with infrared light (0.5 W cm-2) for 5 min.

Original languageEnglish
Article number10980
JournalScientific reports
Volume7
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

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Gold
Nanoparticles
Oxides
Nanocomposites
Equipment and Supplies
Peptides
Transmission Electron Microscopy
Nisin
Photoelectron Spectroscopy
Raman Spectrum Analysis
X-Ray Diffraction
Electron Scanning Microscopy
Spectrum Analysis
Breast Neoplasms
Light

ASJC Scopus subject areas

  • General

Cite this

Rapid synthesis and decoration of reduced graphene oxide with gold nanoparticles by thermostable peptides for memory device and photothermal applications. / Otari, Sachin V.; Kumar, Manoj; Anwar, Muhammad Zahid; Thorat, Nanasaheb D.; Patel, Sanjay K.S.; Lee, Dongjin; Lee, Jai Hyo; Lee, Jung Kul; Kang, Yun Chan; Zhang, Liaoyuan.

In: Scientific reports, Vol. 7, No. 1, 10980, 01.12.2017.

Research output: Contribution to journalArticle

Otari, Sachin V. ; Kumar, Manoj ; Anwar, Muhammad Zahid ; Thorat, Nanasaheb D. ; Patel, Sanjay K.S. ; Lee, Dongjin ; Lee, Jai Hyo ; Lee, Jung Kul ; Kang, Yun Chan ; Zhang, Liaoyuan. / Rapid synthesis and decoration of reduced graphene oxide with gold nanoparticles by thermostable peptides for memory device and photothermal applications. In: Scientific reports. 2017 ; Vol. 7, No. 1.
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