GaAs/AlGaAs nanowire heterostructures studied by scanning tunneling microscopy
(2007) In Nano Letters 7(9). p.2859-2864- Abstract
- We directly image the interior of GaAs/AlGaAs axial and radial nanowire heterostructures with atomic-scale resolution using scanning tunneling microscopy. We show that formation of monolayer sharp and smooth axial interfaces are possible even by vapor-phase epitaxy. However, we also find that instability of the ternary alloys formed in the Au seed fundamentally limits axial heterostructure control, inducing large segment asymmetries. We study radial core-shell nanowires, imaging even ultrathin submonolayer shells. We demonstrate how large twinning-induced morphological defects at the wire surfaces can be removed, ensuring the formation of wires with atomically flat sides.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/656472
- author
- Ouattara, Lassana LU ; Mikkelsen, Anders LU ; Sköld, Niklas LU ; Bolinsson, Jessica LU ; Knaapen, Thijs ; Cavar, Elizabeta LU ; Seifert, Werner LU ; Samuelson, Lars LU and Lundgren, Edvin LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nano Letters
- volume
- 7
- issue
- 9
- pages
- 2859 - 2864
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000249501900057
- scopus:34948907990
- pmid:17722945
- ISSN
- 1530-6992
- DOI
- 10.1021/nl071550z
- language
- English
- LU publication?
- yes
- id
- 4c7b81af-c0a1-43b0-9f01-04616a09dd3f (old id 656472)
- date added to LUP
- 2016-04-01 16:58:20
- date last changed
- 2022-03-15 04:16:47
@article{4c7b81af-c0a1-43b0-9f01-04616a09dd3f, abstract = {{We directly image the interior of GaAs/AlGaAs axial and radial nanowire heterostructures with atomic-scale resolution using scanning tunneling microscopy. We show that formation of monolayer sharp and smooth axial interfaces are possible even by vapor-phase epitaxy. However, we also find that instability of the ternary alloys formed in the Au seed fundamentally limits axial heterostructure control, inducing large segment asymmetries. We study radial core-shell nanowires, imaging even ultrathin submonolayer shells. We demonstrate how large twinning-induced morphological defects at the wire surfaces can be removed, ensuring the formation of wires with atomically flat sides.}}, author = {{Ouattara, Lassana and Mikkelsen, Anders and Sköld, Niklas and Bolinsson, Jessica and Knaapen, Thijs and Cavar, Elizabeta and Seifert, Werner and Samuelson, Lars and Lundgren, Edvin}}, issn = {{1530-6992}}, language = {{eng}}, number = {{9}}, pages = {{2859--2864}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Nano Letters}}, title = {{GaAs/AlGaAs nanowire heterostructures studied by scanning tunneling microscopy}}, url = {{http://dx.doi.org/10.1021/nl071550z}}, doi = {{10.1021/nl071550z}}, volume = {{7}}, year = {{2007}}, }