Type

Journal Article

Authors

Justin D. Holmes
Michael A. Morris
Nikolay Petkov
Colm O’Regan
Subhajit Biswas
Colm O'Regan

Subjects

Chemistry

Topics
morphology silver alloys growth systems semiconductor nanowires supersaturation nanowire vapor liquid solid growth critical high aspect ratio gibbs thompson effect gold kinetics germanium nanowires nanoparticle

Manipulating the growth kinetics of vapor-liquid-solid propagated Ge nanowires (2013)

Abstract This article describes an innovative approach in which bimetallic alloy seeds of AuxAg1–x are used to enhance the growth kinetics of Ge nanowires, via a vapor–liquid–solid (VLS) growth technique. The decreased equilibrium concentration and increased supersaturation of Ge in the liquid alloy seeds, compared to pure Au seeds, results in favorable growth kinetics and the realization of high-aspect ratio millimeter-long Ge nanowires. Also detailed is the manifestation of the Gibbs-Thompson effect resulting in diameter-dependent nanowire growth rates as a function of the Au–Ag–Ge eutectic composition. Significantly, AuxAg1–x alloy seeds lower the critical diameter of the Ge nanowires in this liquid-seeded growth approach. In situ TEM heating experiments established the correlation between the growth kinetics and equilibrium eutectic compositions in the ternary growth systems. The fundamental insights of nanowire growth demonstrated with the ternary eutectic alloys opens up opportunities to engineer the aspect ratio and morphology of a range of semiconductor nanowires.
Collections Ireland -> University College Cork -> Research Institutes and Centres
Ireland -> University College Cork -> Applied Nanoscience Group - Journal Articles
Ireland -> University College Cork -> Tyndall National Institute
Ireland -> University College Cork -> Applied Nanoscience Group
Ireland -> University College Cork -> Chemistry
Ireland -> University College Cork -> Chemistry - Journal Articles
Ireland -> University College Cork -> College of Science, Engineering and Food Science
Ireland -> University College Cork -> Micro-Nanoelectronics Centre

Full list of authors on original publication

Justin D. Holmes, Michael A. Morris, Nikolay Petkov, Colm O’Regan, Subhajit Biswas, Colm O'Regan

Experts in our system

1
Justin D. Holmes
University College Cork
Total Publications: 287
 
2
Michael A. Morris
University College Cork
Total Publications: 164
 
3
Nikolay Petkov
University College Cork
Total Publications: 64
 
4
Subhajit Biswas
University College Cork
Total Publications: 43
 
5
Colm O'Regan
University College Cork
Total Publications: 16