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Electron Microscopy Study of Novel Pt Nanowires Synthesized in the Spaces of Silica Mesoporous Materials

Published online by Cambridge University Press:  28 March 2002

Osamu Terasaki ,
Zheng Liu ,
Tetsu Ohsuna ,
Hyun June Shin  and
Ryong Ryoo
Osamu Terasaki
Affiliation:
Department of Physics & CIR, Tohoku University, Sendai 980-8578, Japan CREST, JST, Tohoku University, Sendai 980-8578, Japan
Zheng Liu
Affiliation:
CREST, JST, Tohoku University, Sendai 980-8578, Japan
Tetsu Ohsuna
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Hyun June Shin
Affiliation:
Department of Chemistry (School of Molecular Science-BK21), KAIST, Taejon 305-701, Korea
Ryong Ryoo
Affiliation:
Department of Chemistry (School of Molecular Science-BK21), KAIST, Taejon 305-701, Korea
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Abstract

Structures of Pt-nanowires, synthesized in channels of silica mesoporous materials MCM-41, SBA-15 and MCM-48, were investigated by transmission electron microscopy. One dimensional (1D) Pt-nanowires were formed inside the channels of the MCM-41, and were single crystals with a length of several tens to several hundreds nanometers and a diameter of ca. 3 nm Pt-nanowires synthesized in SBA-15 formed a new 3D-network following 3D-pore geometry of SBA-15; that is, the main 1D-channels are interconnected to each other through randomly distributed tunnels. These Pt-nanowires showed a well single crystalline. MCM-48 has two non-intersecting chiral channels, and Pt-networks were mostly formed in one of the two channels. Therefore the networks were also chiral; however, the chirality of Pt-networks remained to be determined. It was shown that all Pt-nanowires were formed following the channel geometries of silica mesoporous materials used.

Keywords

Pt nanowiresmesoporous materialsHREM1D-nanowires3D-nanowiresMCM-41MCM-48SBA-15
Type
Research Article
Information
Microscopy and Microanalysis , Volume 8 , Issue 1 , February 2002 , pp. 35 - 39
Copyright
© 2002 Microscopy Society of America

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