Hierarchical Ag Nanostructures on Sn-doped Indium Oxide Nano-branches: Super-hydrophobic Surface for Surface-enhanced Raman Scattering

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 11

PMID 35541281

Authors

Kyungchan Min

Kyoung Soon Choi

Wook Jin Jeon

Dong Kyu Lee

Sein Oh

Jouhahn Lee

Jae-Young Choi

Hak Ki Yu

Affiliations

Soon will be listed here.

Abstract

Herein, we fabricated a super-hydrophobic SERS substrate using Sn-doped indium oxide (Indium-tin-oxide: ITO) nano-branches as a template. ITO nano-branches with tens of nanometer diameter are first fabricated through the vapor-liquid-solid (VLS) growth to provide roughness of the substrate. 10 nm thickness of Ag thin film was deposited and then treated with the post-annealing process to create numerous air-pockets in the Ag film, forming a hierarchical Ag nanostructures. The resulting substrate obtained Cassie's wetting property with a water contact angle of 151°. Compared to the normal hydrophobic Ag nanoparticle substrate, increase of about 4.25-fold higher SERS signal was obtained for 7 μL of rhodamine 6G aqueous solutions.

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