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231224s2011 xx |||||o 00| ||eng c |
| 024 |
7 |
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|a 10.1021/la201797h
|2 doi
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|a pubmed24n0697.xml
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|a eng
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| 100 |
1 |
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|a Khan, Umar
|e verfasserin
|4 aut
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|a Solvent-exfoliated graphene at extremely high concentration
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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| 500 |
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|a Date Completed 03.11.2011
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|a Date Revised 26.07.2011
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We describe three related methods to disperse graphene in solvents with concentrations from 2 to 63 mg/mL. Simply sonicating graphite in N-methyl-2-pyrrolidinone, followed by centrifugation, gives dispersed graphene at concentrations of up to 2 mg/mL. Filtration of a sonicated but uncentrifuged dispersion gives a partially exfoliated powder that can be redispersed at concentrations of up to 20 mg/mL. However, this process can be significantly improved by removing any unexfolaited graphite from the starting dispersion by centrifugation. The centrifuged dispersion can be filtered to give a powder of exfoliated few-layer graphene. This powder can be redispersed at concentrations of at least 63 mg/mL. The dispersed flakes are ~1 μm long and ~3 to 4 layers thick on average. Although some sedimentation occurs, ~26-28 mg/mL of the dispersed graphene appears to be indefinitely stable
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|a Journal Article
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1 |
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|a Porwal, Harshit
|e verfasserin
|4 aut
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| 700 |
1 |
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|a O'Neill, Arlene
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Nawaz, Khalid
|e verfasserin
|4 aut
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| 700 |
1 |
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|a May, Peter
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Coleman, Jonathan N
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 15 vom: 02. Aug., Seite 9077-82
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| 773 |
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|g volume:27
|g year:2011
|g number:15
|g day:02
|g month:08
|g pages:9077-82
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|u http://dx.doi.org/10.1021/la201797h
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