Reduced graphene oxide/molecular imprinted polymer-organic thin film transistor for amino acid detection

In this study, we report the highest mobility in the reduced graphene oxide- (rGO-) based TFTs embedded with Au NPs. In addition, we fabricated a reduced graphene oxide memory device (rGO-capacitor), a reduced graphene oxide thin film transistor (rGO-TFT), and a reduced graphene oxide memory thin film transistor (rGO-MTFT) and characterized their electrical performances. While the rGO-TFT device was investigated for nonambipolar channel performance, the rGO-capacitor and rGO-MTFT were examined for nonvolatile memory capabilities in a metal-graphene-insulator-silicon (MGIS) structure. The incorporation of the gold nanoparticles (Au NPs) between the rGO and an insulator silicon dioxide (SiO2) layer served as a charging element. The rGO-capacitor revealed the memory effect of hysteretic capacitance-voltage (C-V) loops, and the flat-band voltage shift ( Δ V FB ) was measured as 0.1375 V after 100 s retention time. The rGO-TFT shows the p-channel characteristics with high hole mobility of 16.479 cm2/V⋅s. The threshold voltage shift ( Δ V th ) of the rGO-MTFT was detected as 5.74 V from 10 V to -30 V sweep, demonstrating high mobility of 22.887 cm2/V⋅s.

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Solution-processed highly efficient Au nanoparticles and their reduced graphene oxide nanocomposites as charge trapping media for ZnO thin film transistor nonvolatile memory

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.07.185 ◽

2017 ◽

Vol 725 ◽

pp. 1115-1122 ◽

Cited By ~ 12

Author(s):

Manoj Kumar ◽

Sachin Otari ◽

Hakyung Jeong ◽

Dongjin Lee

Keyword(s):

Thin Film ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Nonvolatile Memory ◽

Au Nanoparticles ◽

Thin Film Transistor ◽

Charge Trapping ◽

Zno Thin Film ◽

Solution Processed ◽

Reduced Graphene

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Serine Sensor Based on Graphene Sheet Congo-Red Molecular Imprinted Polymer (GSCR-MIP) Organic Thin Film Transistor (OTFT)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.925.500 ◽

2014 ◽

Vol 925 ◽

pp. 500-504 ◽

Cited By ~ 2

Author(s):

Nurul Farhanah Ab. Halim ◽

M.Noor Ahmad ◽

A.K.M. Shafiqul Islam ◽

A. Yeon Md. Shakaff ◽

Zulkhairi Zakaria ◽

...

Keyword(s):

Congo Red ◽

Chemical Sensor ◽

Thin Film Transistor ◽

Molecular Imprinted Polymer ◽

Organic Thin Film ◽

Organic Thin Film Transistor ◽

Imprinted Polymer ◽

Front End ◽

Sensor Fabrication ◽

With Memory

Molecular imprinted is a technique to produce template-shape cavities in polymer matrix with memory of the template/target molecule for chemical sensor front-end. In this study, it has been shown that the incorporation of graphene sheets/Congo red (GSCR) has enhanced the performance of molecular imprinted polymer (MIP) serine sensor. The polymer is formed via photo-polymerization from methyl methacrylate acid (functional monomer), serine (template) and ethylene glycol dimethacrylate (cross-linker) together with GSCR. By introducing GSCR-MIP, GSCR-MIP OTFT chemical sensor demonstrates a good response when serine is introduced. The performance of GSCR-MIP OTFT serine sensor can be improved through the addition of GSCR, thus GSCR-MIP has high potentials for application in sensor fabrication.

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