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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.)

Laser patterning and induced reduction of graphene oxide functionalized silk fibroin

Full text
Author(s):
Paula, Kelly T. [1] ; Santos, V, Moliria ; Facure, Murilo H. M. [2, 3] ; Andrade, Marcelo B. [4] ; Araujo, Francineide L. [4] ; Correa, Daniel S. [2, 3] ; Ribeiro, Sidney J. L. [5] ; Mendonca, Cleber R. [4]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP - Brazil
[2] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr LNNA, BR-13560970 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Ctr Exact Sci & Technol, PPGQ, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[4] Santos, Moliria, V, Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP - Brazil
[5] Sao Paulo State Univ, Araraquara Inst Chem, BR-14800060 Araraquara, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Optical Materials; v. 99, JAN 2020.
Web of Science Citations: 0
Abstract

This paper presents a one-step method for patterning and reducing graphene oxide functionalized in silk fibroin using femtosecond laser induced forward transfer (LIFT). Such approach renders fibroin, a natural biopolymer with excellent biocompatibility, chemical stability, and mechanical properties, improved electrical conductivity in a controlled and localized way. Composite films based on silk fibroin and graphene oxide/reduced graphene oxide were fabricated by spin coating at room temperature. The films composition was characterized by micro-Raman spectroscopy demonstrating the presence of graphene oxide in the silk fibroin matrix. The influence of pulse energy on the fs laser transfer process was investigated, yielding a threshold energy of 24.0 nJ. Additionally, the laser-induced reduction of graphene oxide attained by LIFT was determined by Raman spectroscopy and further confirmed by an increase in the electrical conductivity. The approach presented here proved to be an efficient route to simultaneously produce micrometric patterns of graphene oxide/silk fibroin composite (with line widths on the order of 1 mu m), and reduction of graphene oxide, opening new opportunities for the development of green composites for electronics devices, including for instance microfluidic sensors, capacitors and LEDs. (AU)

FAPESP's process: 16/11591-8 - Femtosecond laser micro-structuring in biopolymers of celulose and fibroin: fabrication of photonic devices
Grantee:Moliria Vieira dos Santos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/03487-8 - Center of characterization of new mineral species: Raman spectroscopy, electron microprobe and X-ray and neutron diffraction
Grantee:Marcelo Barbosa de Andrade
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 17/10582-8 - Production and characterization of graphene quantum dots and their application in chemical sensors
Grantee:Murilo Henrique Moreira Facure
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/12174-4 - Development of hybrid polymer nanofibers for agricultural applications
Grantee:Daniel Souza Corrêa
Support Opportunities: Regular Research Grants