Highly entangled hollow TiO2nanoribbons templating diphenylalanine assembly

Tae Hee Han; Jun Kyun Oh; Ji Sun Park; Se-Hun Kwon; Sung-Wook Kim; Sang Ouk Kim

doi:10.1039/B819254E

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Highly entangled hollow TiO₂nanoribbons templating diphenylalanine assembly†

Tae Hee Han,^a Jun Kyun Oh,^a Ji Sun Park,^a Se-Hun Kwon,^b Sung-Wook Kim^a and Sang Ouk Kim*^a

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* Corresponding authors

^a Department of Materials Science and Engineering, KAIST Institute for Nanocentury, KAIST, Daejeon, Republic of Korea
E-mail: sangouk.kim@kaist.ac.kr
Fax: +82-42-350-3310
Tel: +82-42-350-3339

^b National Core Research Center for Hybrid Materials Solution, Pusan National University, Pusan, Republic of Korea

Abstract

We introduce a biotemplating approach for creating highly entangled hollow TiO₂nanoribbons by combining peptide assembly with an atomic layer deposition process. An aromatic peptide of diphenylalanine was readily assembled into a hierarchical organogel consisting of highly entangled nanoribbons. Unlike ordinary biomaterials, the peptide nanoribbon framework exhibited a high level of thermal stability, such that it may undergo the further functionalization process of vacuum deposition without significant damage to its nanoscale structure. A nanoscale layer of anatase TiO₂ was deposited on the nanoribbon framework by means of atomic layer deposition. After pyrolysis, a highly entangled nanotubular TiO₂ framework was created successfully. The highly entangled TiO₂ architecture exhibited UV-switchable wetting properties.

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Supplementary files

TGA analysis of peptide xerogel, TEM images, SAED pattern,Raman spectrum of crystalline TiO₂ nanoribbons PDF (757K)

Article information

DOI: https://doi.org/10.1039/B819254E
Article type: Paper
Submitted: 30 Oct 2008
Accepted: 09 Mar 2009
First published: 09 Apr 2009

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J. Mater. Chem., 2009,19, 3512-3516

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Highly entangled hollow TiO₂nanoribbons templating diphenylalanine assembly

T. H. Han, J. K. Oh, J. S. Park, S. Kwon, S. Kim and S. O. Kim, J. Mater. Chem., 2009, 19, 3512 DOI: 10.1039/B819254E

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Journal of Materials Chemistry