Anionic fluorophore-assisted fabrication of gold microstructures inside a hydrogel by multi-photon photoreduction

MANAN MACHIDA, WEILU SHEN, HIROAKI ONOE, Y. U.K.I. HIRUTA, ALEXANDER HEISTERKAMP, E. R.I.C. MAZUR, MITSUHIRO TERAKAWA

Research output: Contribution to journalArticlepeer-review

Abstract

The fabrication of accentuated gold microstructures is demonstrated by multi-photon photoreduction inside an anionic fluorophore-containing hydrogel. We attempted to facilitate gold-ion photoreduction near the focal point of laser pulses, expecting the donation of electrons by the oxidation of fluorophores in the vicinity of gold ions. The presence of anionic FITCdextran also inhibited the spontaneous reduction in untargeted zones, which is attributed to the coordination of gold ions and the anionic FITC-dextran. Simultaneous facilitation and inhibition are promising for the fabrication of dense metal microstructures in the targeted zone while maintaining the hydrogel's light permeability.

Original languageEnglish
Pages (from-to)48-58
Number of pages11
JournalOptical Materials Express
Volume11
Issue number1
DOIs
Publication statusPublished - 2021 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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