Met-Cars: mass deposition and preliminary structural study via TEM

被引：19

作者：

Gao, L

Lyn, ME

Bergeron, DE

Castleman, AW ^{[1
]}

机构：

[1] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2003年 / 229卷 / 1-2期

关键词：

metallocarbohedrenes (Met-Cars); laser vaporization; mass deposition; high-resolution transmission electron microscope (HRTEM);

D O I：

10.1016/S1387-3806(03)00250-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Transition metal-carbon clusters, including metallocarbohedrenes (Met-Cars), are of great interest for their potential applications in nanodevices. Herein we provide evidence of cluster-assembled nanoscopic features formed by the mass-gated deposition of large metal-carbon clusters. Gas phase zirconium-carbon species, gated at the mass corresponding to the Met-Car composition (M8C12), were deposited onto carbon-covered grids under both hard- and soft-landing conditions. The resulting deposited materials were analyzed via high-resolution transmission electron microscopy (HRTEM). Hard-landing conditions were found to lead to the production of species having a structure corresponding to the well-known bulk metal carbide, while studies of soft-landed deposits of zirconium Met-Cars were found to form a FCC structure with lattice parameter similar to15 Angstrom, thus indicating cluster assembly. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：11 / 17

页数：7

共 42 条

[11] GEOMETRIC AND ELECTRONIC-STRUCTURES OF [TI8C12] - ANALOGIES WITH C-60 [J].