On the design and development of foamed GO-hydrogel nanocomposite surfaces by ultra-short laser processing
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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.
Details
| Original language | English |
|---|---|
| Article number | 245701 |
| Journal | Nanotechnology |
| Volume | 34 |
| Issue number | 24 |
| Publication status | Published - 11 Jun 2023 |
| Peer-reviewed | Yes |
External IDs
| PubMed | 36827699 |
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| ORCID | /0000-0003-4333-4636/work/196675358 |
Keywords
ASJC Scopus subject areas
Keywords
- hydrogels, nanocomposites, surface structuring, ultra-short laser patterning