In:
Nanotechnology, IOP Publishing, Vol. 34, No. 24 ( 2023-06-11), p. 245701-
Abstract:
Graphene oxide (GO) and reduced graphene oxide have outstanding qualities that could be exploited as reinforcement and antibacterial agents in a plethora of biomedical applications. In this contribution, it is reported the deployment of a polyacrylamide GO-hydrogel composite (GO@pAAm) which was photo-converted and structured by ultra-short laser irradiation using a direct laser writing (DLW) approach. The materials were characterized by Fourier Transform Infrared spectroscopy, scanning electron microscopy and confocal microscopy. The laser structure generates a multi-photo-induced effect: surface foaming and patterning, microdomains with enhanced selective water-swelling and effective GO photo-reduction. A first laser scan seems likely to induce the photo-reduction of GO and subsequent laser pulses trigger the structure/foaming. The photo-reduction of GO is evidenced by Raman spectroscopy by the relatively changing intensities of the D to G signals. Macroscopically by an increase in conductivity (decrease in sheet resistance from R S-GO@pAAm = 304 ± 20 kΩ sq −1 to R S-rGO@pAAm-DLW = 27 ± 8 kΩ sq −1 ) suggesting a reduction of the material measured by 4-Point-Probe.
Type of Medium:
Online Resource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/acbeb4
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
1362365-5
SSG:
11