The production of concentrated dispersions of few-layer graphene by the direct exfoliation of graphite in organosilanes

被引：26

作者：

Nuvoli, Daniele ^{[1
,2
]}

Alzari, Valeria ^{[1
,2
]}

Sanna, Roberta ^{[1
,2
]}

Scognamillo, Sergio ^{[1
,2
]}

Piccinini, Massimo ^{[3
]}

Peponi, Laura ^{[4
]}

Maria Kenny, Jose ^{[4
]}

Mariani, Alberto ^{[1
,2
]}

机构：

[1] Univ Sassari, Dipartimento Chim & Farm, I-07100 Sassari, Italy

[2] Local INSTM Unit, I-07100 Sassari, Italy

[3] Porto Conte Ric Srl, I-07041 Sassari, Italy

[4] ICTP CSIC, Madrid 28006, Spain

来源：

NANOSCALE RESEARCH LETTERS | 2012年 / 7卷

关键词：

Graphene; Organosilanes; High concentration; Liquid exfoliation; RAMAN-SPECTROSCOPY;

D O I：

10.1186/1556-276X-7-674

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report the formation and characterization of graphene dispersions in two organosilanes, 3-glycidoxypropyl trimethoxysilane (GPTMS) and phenyl triethoxysilane (PhTES) as new reactive solvents. The preparation method was mild and easy and does not produce any chemical modification. The dispersions, which exhibit the Tyndall effect, were characterized by TEM and Raman spectroscopy to confirm the presence of few-layer graphene. Concentrations as high as 0.66 and 8.00 mg/ml were found for PhTES and GPTMS, respectively. The latter is one of the highest values reported for a dispersion of graphene obtained by any method. This finding paves the way for the direct synthesis of polymer nanofiller-containing composites consisting of graphene and reactive silanes to be used in sol-gel synthesis, without any need for solvent removal, thus preventing graphene reaggregation to form graphite flakes.

引用

页码：1 / 7

页数：7

共 35 条

[1]

Alzari V, 2011, J MATER CHEM, V21, P3428

[2] Graphene-containing thermoresponsive nanocomposite hydrogels of poly(N-isopropylacrylamide) prepared by frontal polymerization [J].

Alzari, Valeria ;

Nuvoli, Daniele ;

Scognamillo, Sergio ;

Piccinini, Massimo ;

Gioffredi, Emilia ;

Malucelli, Giulio ;

Marceddu, Salvatore ;

Sechi, Mario ;

Sanna, Vanna ;

Mariani, Alberto .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (24) :8727-8733

[3] Superior thermal conductivity of single-layer graphene [J].

Balandin, Alexander A. ;

Ghosh, Suchismita ;

Bao, Wenzhong ;

Calizo, Irene ;

Teweldebrhan, Desalegne ;

Miao, Feng ;

Lau, Chun Ning .

NANO LETTERS, 2008, 8 (03) :902-907

[4] Electronic confinement and coherence in patterned epitaxial graphene [J].

Berger, Claire ;

Song, Zhimin ;

Li, Xuebin ;

Wu, Xiaosong ;

Brown, Nate ;

Naud, Cecile ;

Mayou, Didier ;

Li, Tianbo ;

Hass, Joanna ;

Marchenkov, Atexei N. ;

Conrad, Edward H. ;

First, Phillip N. ;

de Heer, Wait A. .

SCIENCE, 2006, 312 (5777) :1191-1196

[5] Ultrahigh electron mobility in suspended graphene [J].

Bolotin, K. I. ;

Sikes, K. J. ;

Jiang, Z. ;

Klima, M. ;

Fudenberg, G. ;

Hone, J. ;

Kim, P. ;

Stormer, H. L. .

SOLID STATE COMMUNICATIONS, 2008, 146 (9-10) :351-355

[6] Raman Spectroscopy of Graphene Edges [J].

Casiraghi, C. ;

Hartschuh, A. ;

Qian, H. ;

Piscanec, S. ;

Georgi, C. ;

Fasoli, A. ;

Novoselov, K. S. ;

Basko, D. M. ;

Ferrari, A. C. .

NANO LETTERS, 2009, 9 (04) :1433-1441

[7] Liquid Exfoliation of Defect-Free Graphene [J].

Coleman, Jonathan N. .

ACCOUNTS OF CHEMICAL RESEARCH, 2013, 46 (01) :14-22

[8] Formation of silica/epoxy hybrid network polymers [J].

Davis, SR ;

Brough, AR ;

Atkinson, A .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2003, 315 (1-2) :197-205

[9]

EIZENBERG M, 1979, SURF SCI, V82, P228, DOI 10.1016/0039-6028(79)90330-3

[10] Raman spectrum of graphene and graphene layers [J].

Ferrari, A. C. ;

Meyer, J. C. ;

Scardaci, V. ;

Casiraghi, C. ;

Lazzeri, M. ;

Mauri, F. ;

Piscanec, S. ;

Jiang, D. ;

Novoselov, K. S. ;

Roth, S. ;

Geim, A. K. .

PHYSICAL REVIEW LETTERS, 2006, 97 (18)

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