Liquid-Phase Exfoliation of Graphite Towards Solubilized Graphenes

被引：435

作者：

Bourlinos, Athanasios B. ^{[1
]}

Georgakilas, Vasilios ^{[1
]}

Zboril, Radek ^{[2
]}

Steriotis, Theodore A. ^{[3
]}

Stubos, Athanasios K. ^{[4
]}

机构：

[1] NCSR Demokritos Ag Paraskevi Attikis, Inst Mat Sci, Athens 15310, Greece

[2] Palacky Univ, Dept Phys Chem, Olomouc 77146, Czech Republic

[3] NCSR Demokritos Ag Paraskevi Attikis, Inst Phys Chem, Athens 15310, Greece

[4] NCSR Demokritos Ag Paraskevi Attikis, Inst Nucl Technol & Radiat Protect, Environm Res Lab, Athens 15310, Greece

来源：

SMALL | 2009年 / 5卷 / 16期

关键词：

graphene; graphite; liquid-phase exfoliation; solubilization; solvent effects; EPITAXIAL GRAPHENE; AQUEOUS DISPERSIONS; CARBON NANOTUBES; SHEETS;

D O I：

10.1002/smll.200900242

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A neoteric set of solvents for the liquid-phase exfoliation of graphite towards solubilized graphenes, was demonstrated. Graphite fine powder was suspended by sonication in a series of perfluorinated aromatic solvents to afford moderately dark-gray colloidal dispersions. Each suspension was left for 5 days at ambient conditions in order to settle out any insoluble particles and the supernatant clear colloids were carefully collected for further microscopy characterization. The concentration of a given dispersion was measured quantitatively by filtering a large volume of the colloid through a pre-weighed filter. After the solvent had been completely removed, the filter with the solid residue on it was dried and re-weighed using a high precision balance. A solution of HAuCl4 3H2O in DMF was added in the graphite colloidal dispersion in pyridine followed by reduction with NaBH4 under vigorous stirring. TEM analysis revealed the presence of ultrathin but crystalline sheets, whereas AFM gave results of the formation of individual graphenes.

引用

页码：1841 / 1845

页数：5

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