<P><B>Abstract</B></P><P>A novel route to preparing highly concentrated and conductive reduced graphene oxide (RGO) in various solvents by monovalent cation–<I>π</I> interaction. Previously, the hydro...
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https://www.riss.kr/link?id=A107593557
2012
-
SCOPUS,SCIE
학술저널
3307-3314(8쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P><P>A novel route to preparing highly concentrated and conductive reduced graphene oxide (RGO) in various solvents by monovalent cation–<I>π</I> interaction. Previously, the hydro...
<P><B>Abstract</B></P><P>A novel route to preparing highly concentrated and conductive reduced graphene oxide (RGO) in various solvents by monovalent cation–<I>π</I> interaction. Previously, the hydrophobic properties of high‐quality RGO containing few defects and oxygen moieties have precluded the formation of stable dispersion in various solvents. Cation–<I>π</I> interaction between monovalent cations, such as Na<SUP>+</SUP> or K<SUP>+</SUP>, and six‐membered sp<SUP>2</SUP> carbons on graphene were achieved by simple aging process of graphene oxide (GO) nanosheets dispersed in alkali solvent. The noncovalent binding forces introduced by the cation–<I>π</I> interactions were evident from the chemical shift of the sp<SUP>2</SUP> peak in the solid <SUP>13</SUP>C NMR spectra. Raman spectra and the <I>I</I>‐<I>V</I> characteristics demonstrated the interactions in terms of the presence of <I>n</I>‐type doping effect due to the adsorption of cations with high electron mobility (39 cm<SUP>2</SUP>/Vs). The RGO film prepared without a post‐annealing process displayed superior electrical conductivity of 97,500 S/m at a thickness of 1.7 μm. Moreover, mass production of GO paste with a concentration as high as 20 g/L was achieved by accelerating the cation–<I>π</I> interactions with densification process. This strategy can facilitate the development of large scalable production methods for preparing printed electronics made from high‐quality RGO nanosheets.</P>