Fractionation of graphene oxide single nano-sheets in water-glycerol solutions using gradient centrifugation

Bidram, E; Sulistio, A; Amini, A; Fu, Q; Qiao, GG; Stewart, A; Dunstan, DE

Fractionation of graphene oxide single nano-sheets in water-glycerol solutions using gradient centrifugation

Bidram, E Sulistio, A Amini, A Fu, Q

Qiao, GG Stewart, A Dunstan, DE

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Carbon, 2016, 103, pp. 363-371
Issue Date:: 2016-07-01

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Field	Value	Language
dc.contributor.author	Bidram, E
dc.contributor.author	Sulistio, A
dc.contributor.author	Amini, A
dc.contributor.author	Fu, Q https://orcid.org/0000-0002-4012-330X
dc.contributor.author	Qiao, GG
dc.contributor.author	Stewart, A
dc.contributor.author	Dunstan, DE
dc.date.accessioned	2022-08-16T02:24:10Z
dc.date.available	2022-08-16T02:24:10Z
dc.date.issued	2016-07-01
dc.identifier.citation	Carbon, 2016, 103, pp. 363-371
dc.identifier.issn	0008-6223
dc.identifier.issn	1873-3891
dc.identifier.uri	http://hdl.handle.net/10453/160298
dc.description.abstract	A centrifugation method for the separation and fractionation of graphene oxide (GO) single nano-sheets in the size range of 150-850 nm is reported. The measured electrophoretic mobility of the fractionated single sheets ranges from -0.2 to -1.4 μm cm/V·s where the interpreted zeta potentials vary from -3 mV to -17 mV with increasing sheet size. The single GO sheets show auto-fluorescence in the visible range of 350-650 nm using an excitation wavelength of 200 nm. Furthermore, the GO nano-sheets functionalized using PEG are found to be non-cytotoxic in in-vitro at concentrations up to 90 μg/ml, with a small reduction in cell viability -10%- at 260 μg/ml. The observed concentration-dependence of the cytotoxicity potentially explains the differing conclusions on cytotoxic potential reported in the literature. The GO nano-sheets therefore have the potential to be used as fluorescent drug delivery carriers of specific size.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Carbon
dc.relation.isbasedon	10.1016/j.carbon.2016.02.095
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Fractionation of graphene oxide single nano-sheets in water-glycerol solutions using gradient centrifugation
dc.type	Journal Article
utslib.citation.volume	103
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-16T02:24:09Z
pubs.publication-status	Published
pubs.volume	103

Abstract:

A centrifugation method for the separation and fractionation of graphene oxide (GO) single nano-sheets in the size range of 150-850 nm is reported. The measured electrophoretic mobility of the fractionated single sheets ranges from -0.2 to -1.4 μm cm/V·s where the interpreted zeta potentials vary from -3 mV to -17 mV with increasing sheet size. The single GO sheets show auto-fluorescence in the visible range of 350-650 nm using an excitation wavelength of 200 nm. Furthermore, the GO nano-sheets functionalized using PEG are found to be non-cytotoxic in in-vitro at concentrations up to 90 μg/ml, with a small reduction in cell viability -10%- at 260 μg/ml. The observed concentration-dependence of the cytotoxicity potentially explains the differing conclusions on cytotoxic potential reported in the literature. The GO nano-sheets therefore have the potential to be used as fluorescent drug delivery carriers of specific size.

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http://hdl.handle.net/10453/160298