Journal
NANO LETTERS
Volume 15, Issue 5, Pages 2809-2816Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01144
Keywords
Ge nanowires; Au/Ge alloy melting in situ manipulation; solid-liquid system; dynamics
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Funding
- National Natural Science Foundation of China [21171035, 51302035, 51472049, 11204030]
- Ph.D. Programs Foundation of the Ministry of Education of China [20110075110008, 20130075120001]
- National 863 Program of China [2013AA031903]
- Fundamental Research Funds for the Central Universities
- Chinese Ministry of Education [313015]
- Science and Technology Commission of Shanghai Municipality [13ZR1451200]
- Program Innovative Research Team in University [IRT1221]
- Hong Kong Scholars Program
- Shanghai Leading Academic Discipline Project [B603]
- Program of Introducing Talents of Discipline to Universities [111-2-04]
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Herein, We report time-resolved in situ transmission electron microscopy observation of Au particle melting at a Ge nanowire tip, subsequent forming, of Au/Ge alloy liquid, and its migrating within the Ge nanowire. The migration direction and position of the Au/Ge liquid can be controlled by the applied voltage and the migration speed shows, a linear deceleration. in the nanowire. In a migration model proposed, the relevant dynamic mechanisms (electromigration, thermodiffusion, and viscous force, etc.) are discussed in detail. This work associated with the liquid mass transport in the solid nanowires should provide new insights into the crystal growth, interface engineering, and fabrication of the heterogeneous nanostructure based devices.
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