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Strategies To Control Morphology in Hybrid Group III-V/Group IV Heterostructure Nanowires.

Hillerich, Karla LU ; Dick Thelander, Kimberly LU ; Wen, Cheng-Yen ; Reuter, Mark C ; Kodambaka, Suneel and Ross, Frances M (2013) In Nano Letters 13(3). p.903-908
Abstract
By combining in situ and ex situ transmission electron microscopy measurements, we examine the factors that control the morphology of "hybrid" nanowires that include group III-V and group IV materials. We focus on one materials pair, GaP/Si, for which we use a wide range of growth parameters. We show through video imaging that nanowire morphology depends on growth conditions, but that a general pattern emerges where either single kinks or inclined defects form some distance after the heterointerface. We show that pure Si nanowires can be made to exhibit the same kinks and defects by changing their droplet volume. From this we derive a model where droplet geometry drives growth morphology and discuss optimization strategies. We finally... (More)
By combining in situ and ex situ transmission electron microscopy measurements, we examine the factors that control the morphology of "hybrid" nanowires that include group III-V and group IV materials. We focus on one materials pair, GaP/Si, for which we use a wide range of growth parameters. We show through video imaging that nanowire morphology depends on growth conditions, but that a general pattern emerges where either single kinks or inclined defects form some distance after the heterointerface. We show that pure Si nanowires can be made to exhibit the same kinks and defects by changing their droplet volume. From this we derive a model where droplet geometry drives growth morphology and discuss optimization strategies. We finally discuss morphology control for material pairs where the second material kinks immediately at the heterointerface and show that an interlayer between segments can enable the growth of unkinked hybrid nanowires. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
13
issue
3
pages
903 - 908
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000316243800008
  • pmid:23421434
  • scopus:84874994840
  • pmid:23421434
ISSN
1530-6992
DOI
10.1021/nl303660h
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041), Solid State Physics (011013006)
id
35a8b00f-9a40-4448-9962-2e3af5d77dce (old id 3559608)
date added to LUP
2016-04-01 10:38:00
date last changed
2023-11-10 01:32:14
@article{35a8b00f-9a40-4448-9962-2e3af5d77dce,
  abstract     = {{By combining in situ and ex situ transmission electron microscopy measurements, we examine the factors that control the morphology of "hybrid" nanowires that include group III-V and group IV materials. We focus on one materials pair, GaP/Si, for which we use a wide range of growth parameters. We show through video imaging that nanowire morphology depends on growth conditions, but that a general pattern emerges where either single kinks or inclined defects form some distance after the heterointerface. We show that pure Si nanowires can be made to exhibit the same kinks and defects by changing their droplet volume. From this we derive a model where droplet geometry drives growth morphology and discuss optimization strategies. We finally discuss morphology control for material pairs where the second material kinks immediately at the heterointerface and show that an interlayer between segments can enable the growth of unkinked hybrid nanowires.}},
  author       = {{Hillerich, Karla and Dick Thelander, Kimberly and Wen, Cheng-Yen and Reuter, Mark C and Kodambaka, Suneel and Ross, Frances M}},
  issn         = {{1530-6992}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{903--908}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Strategies To Control Morphology in Hybrid Group III-V/Group IV Heterostructure Nanowires.}},
  url          = {{http://dx.doi.org/10.1021/nl303660h}},
  doi          = {{10.1021/nl303660h}},
  volume       = {{13}},
  year         = {{2013}},
}