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Matrix-Assisted Synthesis of Palladium Nanocage and Nanowires

Published online by Cambridge University Press:  17 March 2011

Jinwoo Cheon ,
Kyung-Bok Lee ,
Hongkyu Kang ,
S. J. Oh  and
H.-C. Ri
Kyung-Bok Lee
Affiliation:
Department of Chemistry and School of Molecular Science-BK21, Korea Advanced Institute of Science and Technology (KAIST), Taejon, 305-701, Korea
Hongkyu Kang
Affiliation:
Department of Chemistry and School of Molecular Science-BK21, Korea Advanced Institute of Science and Technology (KAIST), Taejon, 305-701, Korea
S. J. Oh
Affiliation:
Korea Basic Science Institute (KBSI), Taejon, 305-333, Korea
H.-C. Ri
Affiliation:
Korea Basic Science Institute (KBSI), Taejon, 305-333, Korea
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Abstract

Our study describes the synthesis of novel nanoscale Pd cage and wires whose sizes and shapes are templated by mesoporous matrices. The templates used are cubic phase MCM-48 and hexagonal phase CnMCM-41 (n = 16, and 22), SBA-15, which have pore diameters of ∼3, ∼3.8, ∼4.7, and ∼9 nm, respectively. For Pd@MCM-48, the Pd metal forms spherical domains (∼38 nm) consisting of three dimensionally interconnected into Pd arrays; for Pd@SBA-15 and Pd@MCM-41, the Pd metal forms of one-dimensional wires. Etching out the matrix produces porous Pd cages (pore sizes of ∼1.5 - 2.0 nm) with retaining original domain sizes of ∼38 nm; similarly Pd@SBA-15 and Pd@MCM-41 afford freestanding Pd nanowires. All the materials are examined by TEM, XRD, BET, and EDAX analysis. Furthermore, the thermal behavior of Pd nanowire is briefly described.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 635: Symposium C – Anisotropic Nanoparticles-Synthesis, Characterization & Applications , 2001 , C3.3
Copyright
Copyright © Materials Research Society 2001

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