| 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 |