Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics

Graphene oxide (GO) is an important precursor in the production of chemically derived graphene. During reduction, GO's electrical conductivity and band gap change gradually. Doping and chemical functionalization are also possible, illustrating GO's immense potential in creating functional...

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Publicado:	2013
Materias:	fluorescence intermittency Graphene oxide photobrightening photolysis reduced graphene oxide reduction Chemically derived graphene Fluorescence intermittency Graphene oxides Photobrightening Photoluminescence efficiency Reduced graphene oxides Reduced graphene oxides (RGO) Spatial and temporal heterogeneity Kinetics Photoluminescence Photolysis Reduction Graphene graphite organic compound oxide article chemistry electric conductivity kinetics Electric Conductivity Graphite Organic Chemicals Oxides
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v13_n12_p5777_McDonald http://hdl.handle.net/20.500.12110/paper_15306984_v13_n12_p5777_McDonald
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_15306984_v13_n12_p5777_McDonald
record_format	dspace
spelling	paper:paper_15306984_v13_n12_p5777_McDonald2025-07-30T18:55:27Z Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics fluorescence intermittency Graphene oxide photobrightening photolysis reduced graphene oxide reduction Chemically derived graphene Fluorescence intermittency Graphene oxides Photobrightening Photoluminescence efficiency Reduced graphene oxides Reduced graphene oxides (RGO) Spatial and temporal heterogeneity Kinetics Photoluminescence Photolysis Reduction Graphene graphite organic compound oxide article chemistry electric conductivity kinetics photolysis Electric Conductivity Graphite Kinetics Organic Chemicals Oxides Photolysis Graphene oxide (GO) is an important precursor in the production of chemically derived graphene. During reduction, GO's electrical conductivity and band gap change gradually. Doping and chemical functionalization are also possible, illustrating GO's immense potential in creating functional devices through control of its local hybridization. Here we show that laser-induced photolysis controllably reduces individual single-layer GO sheets. The reaction can be followed in real time through sizable decreases in GO's photoluminescence efficiency along with spectral blueshifts. As-produced reduced graphene oxide (rGO) sheets undergo additional photolysis, characterized by dramatic emission enhancements and spectral redshifts. Both GO's reduction and subsequent conversion to photobrightened rGO are captured through movies of their photoluminescence kinetics. Rate maps illustrate sizable spatial and temporal heterogeneities in sp2 domain growth and reveal how reduction "flows" across GO and rGO sheets. The observed heterogeneous reduction kinetics provides mechanistic insight into GO's conversion to chemically derived graphene and highlights opportunities for overcoming its dynamic, chemical disorder. © 2013 American Chemical Society. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v13_n12_p5777_McDonald http://hdl.handle.net/20.500.12110/paper_15306984_v13_n12_p5777_McDonald
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	fluorescence intermittency Graphene oxide photobrightening photolysis reduced graphene oxide reduction Chemically derived graphene Fluorescence intermittency Graphene oxides Photobrightening Photoluminescence efficiency Reduced graphene oxides Reduced graphene oxides (RGO) Spatial and temporal heterogeneity Kinetics Photoluminescence Photolysis Reduction Graphene graphite organic compound oxide article chemistry electric conductivity kinetics photolysis Electric Conductivity Graphite Kinetics Organic Chemicals Oxides Photolysis
spellingShingle	fluorescence intermittency Graphene oxide photobrightening photolysis reduced graphene oxide reduction Chemically derived graphene Fluorescence intermittency Graphene oxides Photobrightening Photoluminescence efficiency Reduced graphene oxides Reduced graphene oxides (RGO) Spatial and temporal heterogeneity Kinetics Photoluminescence Photolysis Reduction Graphene graphite organic compound oxide article chemistry electric conductivity kinetics photolysis Electric Conductivity Graphite Kinetics Organic Chemicals Oxides Photolysis Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
topic_facet	fluorescence intermittency Graphene oxide photobrightening photolysis reduced graphene oxide reduction Chemically derived graphene Fluorescence intermittency Graphene oxides Photobrightening Photoluminescence efficiency Reduced graphene oxides Reduced graphene oxides (RGO) Spatial and temporal heterogeneity Kinetics Photoluminescence Photolysis Reduction Graphene graphite organic compound oxide article chemistry electric conductivity kinetics photolysis Electric Conductivity Graphite Kinetics Organic Chemicals Oxides Photolysis
description	Graphene oxide (GO) is an important precursor in the production of chemically derived graphene. During reduction, GO's electrical conductivity and band gap change gradually. Doping and chemical functionalization are also possible, illustrating GO's immense potential in creating functional devices through control of its local hybridization. Here we show that laser-induced photolysis controllably reduces individual single-layer GO sheets. The reaction can be followed in real time through sizable decreases in GO's photoluminescence efficiency along with spectral blueshifts. As-produced reduced graphene oxide (rGO) sheets undergo additional photolysis, characterized by dramatic emission enhancements and spectral redshifts. Both GO's reduction and subsequent conversion to photobrightened rGO are captured through movies of their photoluminescence kinetics. Rate maps illustrate sizable spatial and temporal heterogeneities in sp2 domain growth and reveal how reduction "flows" across GO and rGO sheets. The observed heterogeneous reduction kinetics provides mechanistic insight into GO's conversion to chemically derived graphene and highlights opportunities for overcoming its dynamic, chemical disorder. © 2013 American Chemical Society.
title	Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
title_short	Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
title_full	Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
title_fullStr	Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
title_full_unstemmed	Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
title_sort	direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v13_n12_p5777_McDonald http://hdl.handle.net/20.500.12110/paper_15306984_v13_n12_p5777_McDonald
_version_	1840327360017072128

Direct observation of spatially heterogeneous single-layer graphene oxide reduction kinetics

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