2010
DOI: 10.1002/pssr.201004402
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Surface mediated control of droplet density and morphology on GaAs and AlAs surfaces

Abstract: We present a comparative study of gallium (Ga) and aluminium (Al) droplets fabricated on GaAs (100) and AlAs (100) surfaces. Higher density of Ga droplets is achieved on AlAs surface compared with GaAs surface. Similarly, the density of Al nanostructures is higher on AlAs surface than on GaAs surface, even though different morphologies are obtained on each surface. Further, while uniform Ga droplets are formed on both GaAs and AlAs surfaces, Al rings and dots, with big inhomogeneity, are observed on GaAs and A… Show more

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Cited by 12 publications
(8 citation statements)
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“…At this aspect ratio the central line and height variations along the nanotracks become vivid. The terminating form of T2 is very different to the flat nanodisc of T1 and similar to that observed in the synthesis of in-plane nanowires, 26,28 and asymmetric nanoholes, 37 counting its preferential assembly of a "pit" along the ±[110] direction. Nanotracks terminating in this way -with a high raised lips on the trailing side -are uncommon and only noted here for completeness.…”
Section: Morphological Characterization Of In-plane Gaasbi Nanotrackssupporting
confidence: 62%
“…At this aspect ratio the central line and height variations along the nanotracks become vivid. The terminating form of T2 is very different to the flat nanodisc of T1 and similar to that observed in the synthesis of in-plane nanowires, 26,28 and asymmetric nanoholes, 37 counting its preferential assembly of a "pit" along the ±[110] direction. Nanotracks terminating in this way -with a high raised lips on the trailing side -are uncommon and only noted here for completeness.…”
Section: Morphological Characterization Of In-plane Gaasbi Nanotrackssupporting
confidence: 62%
“…However, a drawback of SK growth mode is that strain is inevitably involved during QD formation. Recently, lots of research efforts have been made on droplet epitaxy (DE), which is capable of fabricating nanostructures on lattice‐mismatched as well as lattice‐matched materials 1, 2. Strain‐free optical pumped quantum ring (QR) lasers and nanostructure photodetectors have also been demonstrated by using DE 3, 4.…”
Section: Introductionmentioning
confidence: 99%
“…Homo‐epitaxial nano‐crystalline templates can be fabricated and thus have been used for the fabrication of many hybrid quantum and nano‐structures 6, 7. Quantum dots (QDs) and rings are most commonly studied structures and also ring‐shaped quantum structures, QD molecules, various nanostructure complex ensembles of quantumring geometry and MDs, nano‐hole drilling or local etching effect and running MDs are only a few examples of DE 8–17, as observed by microscopy 27–29. Also optoelectronic device applications such as solar cells using GaAs quantum rings, inter‐sublevel Infrared photo‐detector and lasers have been demonstrated by DE 18–20.…”
Section: Introductionmentioning
confidence: 99%