Semi-transparent, conductive thin films of electrochemical exfoliated graphene
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AuthorsMarković, Zoran M.
Kepić, Dejan P.
Holclajtner-Antunović, Ivanka D.
Pavlović, Vladimir B.
MetadataShow full item record
The electrochemical exfoliation of graphite to give one-atom-thick graphene with desirable properties is a green, cost-effective method for high-yield graphene production. This paper presents the results of electrochemical exfoliation of two different graphite precursors under an applied direct current voltage of +12 V. The used characterization techniques (elemental analysis, Fourier transform infrared spectroscopy, X-ray diffraction, X-photoelectron spectroscopy, Raman spectroscopy, field emission scanning electron microscopy and atomic force microscopy) showed that the exfoliated powder is highly functionalized with a low carbon/oxygen content that is similar to graphene oxide. The exfoliated graphene sheets dispersed in N,N-dimethylformamide were deposited on ano-discs by vacuum filtration and transferred to glass ceramic substrates. The thermal annealing of the as-deposited films at 600 degrees C for 30 minutes resulted in an increase in the carbon/oxygen ratio by more than 3 fold... and a decrease in the sheet resistance by 25%. The lowest values for the sheet resistance of the annealed graphene thin films were in the range of 0.32 +/- 0.04 to 0.84 +/- 0.1 kohm sq(-1) depending on the graphite source that was used.
Source:RSC Advances, 2016, 6, 45, 39275-39283
- Thin films of single wall carbon nanotubes and graphene for electronic application (RS-172003)
- SASPRO - Mobility Programme of Slovak Academy of Sciences: Supportive Fund for Excellent Scientists (EU-609427)
- SASPRO Programme project [1237/02/02-b], Slovak Academy of Sciences, VEGA [2/0093/16], [SK-SRB-2013-0044 (451-03-545/2015-09/07)]