Details
| Original language | English |
|---|---|
| Article number | 187 |
| Journal | Scientific Reports |
| Volume | 8 |
| Publication status | Published - 9 Jan 2018 |
Abstract
The integration of metal microstructures and soft materials is promising for the realization of novel optical and biomedical devices owing to the flexibility and biocompatibility of the latter. Nevertheless, the fabrication of three-dimensional metal structures within a soft material is still challenging. In this study, we demonstrate the fabrication of a silver diffraction grating inside a biocompatible poly(ethylene glycol) diacrylate (PEGDA) hydrogel by using a 522-nm femtosecond laser via multi-photon photoreduction of silver ions. The optical diffraction pattern obtained with the grating showed equally spaced diffraction spots, which indicated that a regular, periodic silver grating was formed. Notably, the distance between the diffraction spots changed when the water content in the hydrogel was reduced. The grating period decreased when the hydrogel shrank owing to the loss of water, but the straight shapes of the line structures were preserved, which demonstrated the optical tunability of the fabricated structure. Our results demonstrate the potential of the femtosecond laser-based photoreduction technique for the fabrication of novel tunable optical devices as well as highly precise structures.
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In: Scientific Reports, Vol. 8, 187, 09.01.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Shrinkable silver diffraction grating fabricated inside a hydrogel using 522-nm femtosecond laser
AU - Machida, Manan
AU - Nakajima, Yasutaka
AU - Torres-Mapa, Maria Leilani
AU - Heinemann, Dag
AU - Heisterkamp, Alexander
AU - Terakawa, Mitsuhiro
N1 - Funding information: This work was partially supported by JSPS and DAAD under the Japan-Germany Research Cooperative Program and by a grant from The Amada Foundation.
PY - 2018/1/9
Y1 - 2018/1/9
N2 - The integration of metal microstructures and soft materials is promising for the realization of novel optical and biomedical devices owing to the flexibility and biocompatibility of the latter. Nevertheless, the fabrication of three-dimensional metal structures within a soft material is still challenging. In this study, we demonstrate the fabrication of a silver diffraction grating inside a biocompatible poly(ethylene glycol) diacrylate (PEGDA) hydrogel by using a 522-nm femtosecond laser via multi-photon photoreduction of silver ions. The optical diffraction pattern obtained with the grating showed equally spaced diffraction spots, which indicated that a regular, periodic silver grating was formed. Notably, the distance between the diffraction spots changed when the water content in the hydrogel was reduced. The grating period decreased when the hydrogel shrank owing to the loss of water, but the straight shapes of the line structures were preserved, which demonstrated the optical tunability of the fabricated structure. Our results demonstrate the potential of the femtosecond laser-based photoreduction technique for the fabrication of novel tunable optical devices as well as highly precise structures.
AB - The integration of metal microstructures and soft materials is promising for the realization of novel optical and biomedical devices owing to the flexibility and biocompatibility of the latter. Nevertheless, the fabrication of three-dimensional metal structures within a soft material is still challenging. In this study, we demonstrate the fabrication of a silver diffraction grating inside a biocompatible poly(ethylene glycol) diacrylate (PEGDA) hydrogel by using a 522-nm femtosecond laser via multi-photon photoreduction of silver ions. The optical diffraction pattern obtained with the grating showed equally spaced diffraction spots, which indicated that a regular, periodic silver grating was formed. Notably, the distance between the diffraction spots changed when the water content in the hydrogel was reduced. The grating period decreased when the hydrogel shrank owing to the loss of water, but the straight shapes of the line structures were preserved, which demonstrated the optical tunability of the fabricated structure. Our results demonstrate the potential of the femtosecond laser-based photoreduction technique for the fabrication of novel tunable optical devices as well as highly precise structures.
UR - http://www.scopus.com/inward/record.url?scp=85040527220&partnerID=8YFLogxK
U2 - 10.1038/s41598-017-17636-z
DO - 10.1038/s41598-017-17636-z
M3 - Article
C2 - 29317662
AN - SCOPUS:85040527220
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 187
ER -