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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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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]
Total Authors: 11
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
Total Affiliations: 7
Document type: Journal article
Source: Journal of Materials Science; v. 53, n. 14, p. 10049-10058, JUL 2018.
Web of Science Citations: 5
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