Matrix-Assisted Synthesis of Palladium Nanocage and Nanowires
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 C(sub n)MCM-41 (n = 16, and 22), SBA-15, which have pore diameters of approx.=3, approx.=3.8, approx.=4, approx.=7, and approx.=9 nm, respectively. For PdMCM-48, the Pd metal forms spherical domains (approx.=38 nm) consisting of three dimensionally interconnected into Pd arrays; for PdSBA-15 and PdMCM-41,the Pd metal forms of one-dimensional wires. Etching out the matrix produces porous Pd cages (pore sizes of approx.=1.5 - 2.0 nin) with retaining original domain sizes of approx.=38 nm; similarly PdSBA-l5 and PdMCM-4l 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADP011015
Entities
People
- H. -c. Ri
- Hongkyu Kang
- Jin woo Cheon
- Kyung-bok Lee
- S. J. Oh
Organizations
- KAIST