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

Author(s):Show less -

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]

Affiliation

^[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

• Document type: Journal article
• Source: Journal of Materials Science; v. 53, n. 14, p. 10049-10058, JUL 2018.
• Web of Science Citations: 6

Abstract

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)

• FAPESP's process: 10/13033-6 - Fabrication of layer-by-layer films for fuel cell applications
• Grantee: Celina Massumi Miyazaki
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/00023-9 - Modeling and Simulation of Nanostructures and Nanostructured Materials
• Grantee: Alexandre Fontes da Fonseca
• Support type: Regular Research Grants
• FAPESP's process: 15/14703-9 - Theoretical study on the structural and mechanical properties of MOFs (metal-organic frameworks)
• Grantee: Daiane Damasceno Borges
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 12/01484-9 - Study of layer-by-layer films of PEDOT, graphene, platinum nanoparticles and Nafion®, foreseeing applications in microfuel cells
• Grantee: Antonio Riul Júnior
• Support type: Regular Research Grants
• FAPESP's process: 14/11410-8 - Multi-user equipment approved in grant 2013/14262-7: Streamline Renishaw
• Grantee: Osvaldo Novais de Oliveira Junior
• Support type: Multi-user Equipment Program
• FAPESP's process: 14/24547-1 - Theoretical investigations on growth and fracture mechanisms of graphene-based nanostructures
• Grantee: Cristiano Francisco Woellner
• Support type: Scholarships in Brazil - Post-Doctorate