期刊
ADVANCED FUNCTIONAL MATERIALS
卷 20, 期 9, 页码 1390-1396出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200902063
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资金
- Nanyang Technological University (NTU)
- National Research Foundation (NRF) Singapore [NRF-G-CRP2007-01]
Dense and well-aligned arrays of TiO2 nanotubes extending from various substrates are successfully fabricated via a new liquid-phase atomic layer deposition (LALD) in nanoporous anodic alumina (AAO) templates followed by alumina dissolution. The facile and versatile process circumvents the need for vacuum conditions critical in traditional gas-phase ALD and yet confers ALD-like deposition rates of 1.6-2.2 angstrom cycle(-1), rendering smooth conformal nanotube walls that surpass those achievable by sol gel and Ti-anodizing techniques. The nanotube dimensions can be tuned, with most robust structures being 150-400 nm tall, 60-70 nm in diameter with 5-20 nm thick walls. The viability of TiO2 nanotube arrays deposited on indium tin oxide (ITO)-glass electrodes for application in model hybrid poly(3-hexylthiophene) (P3HT):TiO2 solar cells is studied. The results achieved provide platforms and research directions for further advancements.
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