Experimental and computational investigation of reduced graphene oxide nanoplatelets stabilized in poly(styrene sulfonate) sodium salt

Autor(es):Mostrar menos -

Miyazaki, Celina M. ^{[1, 2]} ; Maria, Marco A. E. ^{[1, 3, 4]} ; Borges, Daiane Damasceno ^[3] ; Woellner, Cristiano F. ^[3] ; Brunetto, Gustavo ^[3] ; Fonseca, Alexandre F. ^[3] ; Constantino, Carlos J. L. ^[5] ; Pereira-da-Silva, Marcelo A. ^{[6, 7]} ; de Siervo, Abner ^[3] ; Galvao, Douglas S. ^[3] ; Riul, Jr., Antonio ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, POSMAT Programa Posgrad Ciencia & Tecnol Mat, Bauru, SP - Brazil

^[2] Univ Fed Sao Carlos DFQM, Sorocaba, SP - Brazil

^[3] Univ Estadual Campinas, Appl Phys Dept, BR-13083970 Campinas, SP - Brazil

^[4] Fac Engn Sorocaba FACENS, Sorocaba, SP - Brazil

^[5] Univ Estadual Paulista, UNESP, Presidente Prudente, SP - Brazil

^[6] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

^[7] Ctr Univ Cent Paulista UNICEP, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Science; v. 53, n. 14, p. 10049-10058, JUL 2018.
• Citações Web of Science: 6

Resumo

The production of large-area interfaces and the use of scalable methods to build up designed nanostructures generating advanced functional properties are of high interest for many materials science applications. Nevertheless, large-area coverage remains a major problem even for pristine graphene, and here we present a hybrid, composite graphene-like material soluble in water that can be exploited in many areas such as energy storage, electrodes fabrication, selective membranes and biosensing. Graphene oxide (GO) was produced by the traditional Hummers' method being further reduced in the presence of poly(styrene sulfonate) sodium salt (PSS), thus creating stable reduced graphene oxide (rGO) nanoplatelets wrapped by PSS (GPSS). Molecular dynamics simulations were carried out to further clarify the interactions between PSS molecules and rGO nanoplatelets, with calculations supported by Fourier transform infrared spectroscopy analysis. The intermolecular forces between rGO nanoplatelets and PSS lead to the formation of a hybrid material (GPSS) stabilized by van der Waals forces, allowing the fabrication of high-quality layer-by-layer (LbL) films with poly(allylamine hydrochloride) (PAH). Raman and electrical characterizations corroborated the successful modifications in the electronic structures from GO to GPSS after the chemical treatment, resulting in (PAH/GPSS) LbL films four orders of magnitude more conductive than (PAH/GO). (AU)

• Processo FAPESP: 15/14703-9 - Investigação teórica de propriedades estruturais e mecânicas de MOFs (metal-organic frameworks)
• Beneficiário: Daiane Damasceno Borges
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/24547-1 - Investigação teórica de propriedades de crescimento e fratura de nanoestruturas baseadas em grafeno
• Beneficiário: Cristiano Francisco Woellner
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 10/13033-6 - Fabricação de Filmes Ultrafinos Automontados para Aplicações em Células Combustíveis
• Beneficiário: Celina Massumi Miyazaki
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/11410-8 - EMU concedido no processo 2013/14262-7: Streamline Renishaw
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 12/01484-9 - Estudo de filmes automontados de PEDOT, grafeno, nanopartículas de platina e Nafion®, visando aplicação em microcélulas combustíveis
• Beneficiário: Antonio Riul Júnior
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/00023-9 - Simulação e Modelagem de Nanoestruturas e Materiais Nanoestruturados
• Beneficiário: Alexandre Fontes da Fonseca
• Linha de fomento: Auxílio à Pesquisa - Regular