Abstract
The light-stimulated control of flow velocity in the hydrogel microchannel was demonstrated by utilizing a metal microstructure fabricated by multiphoton photoreduction. The metal microstructure was fabricated adjacent to the microchannel in a poly-N- isopropylacrylamide (PNIPAm) hydrogel. Owing to the photothermal conversion at the metal microstructure, local deformation of the microchannel and change in flow velocity was induced as a result of the volume phase transition of the supporting hydrogel around the metal microstructure. Wavelength-selective change in the flow velocity was realized by utilizing dissimilar metal microstructures, that exhibit different optical resonances. The results indicate that multiphoton photoreduction is a promising method for fabricating novel hydrogel devices having flow-controllable switches by arranging light-absorbing structures with high spatial selectivity.
| Original language | English |
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| Pages (from-to) | 3303-3312 |
| Number of pages | 10 |
| Journal | Optical Materials Express |
| Volume | 12 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2022 Aug 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials