Hierarchical titania nanotubes with self-branched crystalline nanorods

Changdeuck Bae, Youngjin Yoon, Won Sub Yoon, Joo Ho Moon, Jiyoung Kim, Hyunjung Shin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Surface decoration strategy for one-dimensional nanostructures will improve their electrical, optical, mechanical, and electrochemical performances dramatically. Heterogeneous growth/deposition on surfaces, however, may create undesired junction interfaces in the system. Here we report a procedure during which amorphous titania nanotubes are readily self-branched with crystalline titanate nanorods at room temperature. The starting amorphous titania nanotubes were prepared by low-temperature atomic layer deposition combined with the template-directed approach. We routinely observed the self-branching phenomenon of crystalline titanate nanorods with a few nanometers in diameter onto the surfaces of the amorphous titania nanotubes in mild alkali solutions. The resulting structures were analyzed by field-emission scanning electron microscopy, high-resolution transmission electron microscopy, and electron energy loss spectroscopy. The reactivity of the hierarchical titania nanotube arrays was observed to be improved as a Li secondary battery electrode. Upon complete consumption of the amorphous body of titania nanotubes, in addition, titanate nanosheets/layers consisting of single TiO2 layers with unit-cell thickness were obtained, elucidating the formation mechanism of layered titanate materials by alkali treatment.

Original languageEnglish
Pages (from-to)1581-1587
Number of pages7
JournalACS Applied Materials and Interfaces
Volume2
Issue number6
DOIs
Publication statusPublished - 2010 Jun 23

Fingerprint

Nanorods
Nanotubes
Titanium
Crystalline materials
Alkalies
Secondary batteries
Atomic layer deposition
Nanosheets
Electron energy loss spectroscopy
High resolution transmission electron microscopy
Field emission
Nanostructures
Cells
titanium dioxide
Temperature
Scanning electron microscopy
Electrodes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Bae, Changdeuck ; Yoon, Youngjin ; Yoon, Won Sub ; Moon, Joo Ho ; Kim, Jiyoung ; Shin, Hyunjung. / Hierarchical titania nanotubes with self-branched crystalline nanorods. In: ACS Applied Materials and Interfaces. 2010 ; Vol. 2, No. 6. pp. 1581-1587.
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Hierarchical titania nanotubes with self-branched crystalline nanorods. / Bae, Changdeuck; Yoon, Youngjin; Yoon, Won Sub; Moon, Joo Ho; Kim, Jiyoung; Shin, Hyunjung.

In: ACS Applied Materials and Interfaces, Vol. 2, No. 6, 23.06.2010, p. 1581-1587.

Research output: Contribution to journalArticle

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