Structural evolution and graphitization of metallorganic-Pt suspended nanowires under high-current-density electrical test

被引：15
作者：
Gazzadi, Gian Carlo [1 ]
Frabboni, Stefano [2 ,3 ]
机构：
[1] CNR INFM S3, I-41100 Modena, Italy
[2] Univ Modena & Reggio Emilia, CNR INFM S3, I-41100 Modena, Italy
[3] Univ Modena & Reggio Emilia, Dept Fis, I-41100 Modena, Italy
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 17期
关键词：
current density; electromigration; electron beam deposition; granular materials; graphite; graphitisation; nanofabrication; nanowires; organometallic compounds; platinum; BEAM; FABRICATION; DEPOSITION; PLATINUM; CARBON;
D O I：
10.1063/1.3119582
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a real-time investigation of the dramatic structural evolution occurring in metallorganic-Pt suspended nanowires (SNWs) (20 nm size) under high-current-density electrical test. SNWs are fabricated by electron beam-induced deposition and consist of Pt nanograins (2-3 nm) embedded in a carbonaceous matrix. As current increases, the Pt-C granular material transforms into Pt-depleted, graphitized C with a two-stage process. First, Pt coalescence into big grains (10-15 nm) is observed, then, for current density approaching 10(7) A/cm(2), grains are depleted by Pt electro- and thermomigration, leaving a graphitized C matrix. The graphitic-C wire eventually breaks forming a nanosize gap.
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