Photo-induced nucleation of rutile nanorods - An ignored parameter in crystallization

Tsung Ying Ke, Po Chin Chen, Min Han Yang, Hsin-Tien Chiu, Chi Young Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


This work presents a surfactant-free and economical sol-gel method to synthesize multi-branched rutile TiO2 nano-trees. Simple illumination by incandescent light during synthesis causes numerous branches to grow from the sides of nanorods, this process is accompanied by hydroxylation of the crystal surface. A {101} twin is demonstrated to connect the trunk to the branches. The extents of branching and surface hydroxylation are controlled by either photo-illumination or the addition of an exciton scavenger (H 2O2). The relationship between the quantity of the branches and the excitons can be elucidated by considering photo-induced defects.

Original languageEnglish
Pages (from-to)5292-5295
Number of pages4
Issue number17
StatePublished - 7 Sep 2011

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