Spatially-targeted laser fabrication of multi-metal microstructures inside a hydrogel

Manan Machida, Takuro Niidome, Hiroaki Onoe, Alexander Heisterkamp, Mitsuhiro Terakawa

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The spatially-targeted fabrication of bimetallic microstructures coexisting in the supporting hydrogel is demonstrated by multi-photon photoreduction. Microstructures composed of gold and silver were fabricated along a predefined trajectory by taking advantages of the hydrogel's ionic permeability. Different resonant wavelengths of optical absorption were obtained for gold, silver, and their bimetallic structures. Transmission electron microscopy and energy dispersive X-ray analysis revealed that the optical properties are attributable to the formation of bimetallic structure consisted of core-shell nanoparticles. The fabrication of dissimilar metal structures within hydrogel is a promising technique for optically driven actuators in soft robotics and sensing applications by allowing for site-selective optical properties.

Original languageEnglish
Pages (from-to)14657-14666
Number of pages10
JournalOptics Express
Issue number10
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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