التفاصيل البيبلوغرافية
| العنوان: |
A simple visible light photo-assisted method for assembling and curing multilayer GO thin films. |
| المؤلفون: |
da Silva, Mauro Francisco Pinheiro1,2 mfps@usp.br, de Oliveira, Débora Rose2,3, Cavallari, Marco Roberto1,2, Tadeu Dirani, Ely Antonio1,2,4, Triboni, Eduardo Rezende2,4, Paterno, Leonardo Giordano2,5, Fonseca, Fernando Josepetti1,2, Ando, Rômulo Augusto2,3, da Silva Baptista, Maurício2,3, Landers, Richard2,6, Politi, Mário Jose2,3, Isolani, Paulo Celso2,3, Bernardo Lenz e Silva, Guilherme Frederico1 |
| المصدر: |
Materials Chemistry & Physics. Sep2015, Vol. 165, p125-133. 9p. |
| مصطلحات موضوعية: |
*GRAPHENE oxide, *CURING, *VISIBLE spectra, *MOLECULAR self-assembly, *MULTILAYERS, *METALLIC thin films |
| مستخلص: |
A simple and efficient method for deposition of reduced graphene oxide (RGO) thin films onto arbitrary substrates is described. The present protocol consists in the application of radial compression to a thin layer of graphene oxide (GO) formed at the air–liquid interface of an ammoniacal dispersion of graphene oxide by continuous irradiation with visible light, that drives both the formation and curing of the film. Both infrared and near infrared luminescence spectroscopies were used for the proposition of a chemical mechanism in which the in situ singlet oxygen Δ 1 O 2 , generated by the photosensitization of molecular oxygen to visible light, initiates the formation and curing of the film. The GO and RGO films display Raman spectral signatures typical of graphene – based materials, with thickness of ca. 20 nm as evaluated by atomic force microscopy. The deposited films exhibited good transparency to visible light (max. 85%; 550 ± 2 nm), electrical resistivity equals to 14 ± 0.02 Ω m, sheet resistance equals to 5 kΩ sq −1 with associated charge carrier mobility of 200 cm 2 /V s. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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