TiO2 Nanofoam–Nanotube Array for Surface-Enhanced Raman Scattering

Li Liu, Fan Pan, Chang Liu, Liangliang Huang, Wei Li, Xiaohua Lu

Research output: Contribution to journalArticle

Abstract

By tuning the anodic voltage and electrochemical reaction time, we have synthesized a series of TiO2 nanofoam–nanotube array structures via a two-step anodic oxidation process. The produced nanofoam–nanotube array demonstrated a remarkable Raman scattering enhancement. The maximum enhancement factors are 2.3 × 105 for methylene blue. Factors such as the nanotube pore size, nanofoam, and solute concentration have been investigated. The Raman scattering enhancement is attributed to the existence of the nanofoam structure, which enables multiple laser scatterings among the periodic voids and allows for the occurrence of Raman scattering. The proposed simple and inexpensive approach can promote the use of TiO2 materials for surface-enhanced Raman scattering applications in chemistry, biology, and nanoscience.
Original languageEnglish
JournalACS Applied Nano Materials
Early online date20 Nov 2018
DOIs
Publication statusE-pub ahead of print - 20 Nov 2018

Bibliographical note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.8b01566

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