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High Yield of GaAs Nanowire Arrays on Si Mediated by the Pinning and Contact Angle of Ga

Russo-Averchi, Eleonora ; Vukajlovic Plestina, Jelena ; Tütüncüoglu, Gözde ; Matteini, Federico ; Dalmau-Mallorquí, Anna ; de la Mata, Maria ; Rüffer, Daniel ; Potts, Heidi A LU ; Arbiol, Jordi and Conesa-Boj, Sonia , et al. (2015) In Nano Letters 15(5). p.74-2869
Abstract

GaAs nanowire arrays on silicon offer great perspectives in the optoelectronics and solar cell industry. To fulfill this potential, gold-free growth in predetermined positions should be achieved. Ga-assisted growth of GaAs nanowires in the form of array has been shown to be challenging and difficult to reproduce. In this work, we provide some of the key elements for obtaining a high yield of GaAs nanowires on patterned Si in a reproducible way: contact angle and pinning of the Ga droplet inside the apertures achieved by the modification of the surface properties of the nanoscale areas exposed to growth. As an example, an amorphous silicon layer between the crystalline substrate and the oxide mask results in a contact angle around 90°,... (More)

GaAs nanowire arrays on silicon offer great perspectives in the optoelectronics and solar cell industry. To fulfill this potential, gold-free growth in predetermined positions should be achieved. Ga-assisted growth of GaAs nanowires in the form of array has been shown to be challenging and difficult to reproduce. In this work, we provide some of the key elements for obtaining a high yield of GaAs nanowires on patterned Si in a reproducible way: contact angle and pinning of the Ga droplet inside the apertures achieved by the modification of the surface properties of the nanoscale areas exposed to growth. As an example, an amorphous silicon layer between the crystalline substrate and the oxide mask results in a contact angle around 90°, leading to a high yield of vertical nanowires. Another example for tuning the contact angle is anticipated, native oxide with controlled thickness. This work opens new perspectives for the rational and reproducible growth of GaAs nanowire arrays on silicon.

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publishing date
type
Contribution to journal
publication status
published
in
Nano Letters
volume
15
issue
5
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:84929193310
  • pmid:25894762
ISSN
1530-6992
DOI
10.1021/nl504437v
language
English
LU publication?
no
id
f2974ab9-6d81-4ae7-8354-3e5cfa4f93d6
date added to LUP
2019-05-15 09:54:14
date last changed
2024-01-15 19:19:43
@article{f2974ab9-6d81-4ae7-8354-3e5cfa4f93d6,
  abstract     = {{<p>GaAs nanowire arrays on silicon offer great perspectives in the optoelectronics and solar cell industry. To fulfill this potential, gold-free growth in predetermined positions should be achieved. Ga-assisted growth of GaAs nanowires in the form of array has been shown to be challenging and difficult to reproduce. In this work, we provide some of the key elements for obtaining a high yield of GaAs nanowires on patterned Si in a reproducible way: contact angle and pinning of the Ga droplet inside the apertures achieved by the modification of the surface properties of the nanoscale areas exposed to growth. As an example, an amorphous silicon layer between the crystalline substrate and the oxide mask results in a contact angle around 90°, leading to a high yield of vertical nanowires. Another example for tuning the contact angle is anticipated, native oxide with controlled thickness. This work opens new perspectives for the rational and reproducible growth of GaAs nanowire arrays on silicon. </p>}},
  author       = {{Russo-Averchi, Eleonora and Vukajlovic Plestina, Jelena and Tütüncüoglu, Gözde and Matteini, Federico and Dalmau-Mallorquí, Anna and de la Mata, Maria and Rüffer, Daniel and Potts, Heidi A and Arbiol, Jordi and Conesa-Boj, Sonia and Fontcuberta i Morral, Anna}},
  issn         = {{1530-6992}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{5}},
  pages        = {{74--2869}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{High Yield of GaAs Nanowire Arrays on Si Mediated by the Pinning and Contact Angle of Ga}},
  url          = {{http://dx.doi.org/10.1021/nl504437v}},
  doi          = {{10.1021/nl504437v}},
  volume       = {{15}},
  year         = {{2015}},
}