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 language | English |
|---|---|
| Pages (from-to) | 1581-1587 |
| Number of pages | 7 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 2 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2010 Jun 23 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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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 journal › Article
TY - JOUR
T1 - Hierarchical titania nanotubes with self-branched crystalline nanorods
AU - Bae, Changdeuck
AU - Yoon, Youngjin
AU - Yoon, Won Sub
AU - Moon, Joo Ho
AU - Kim, Jiyoung
AU - Shin, Hyunjung
PY - 2010/6/23
Y1 - 2010/6/23
N2 - 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.
AB - 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.
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U2 - 10.1021/am100299e
DO - 10.1021/am100299e
M3 - Article
VL - 2
SP - 1581
EP - 1587
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 6
ER -