MBE Growth and Characteristics of Self-Assembled InAs/InGaAs/GaAs Quantum Dots

Park, C.Y.; Kim, J.M.; Lee, Y.T.

doi:10.1109/iciprm.2006.1634175

Cited by 1 publication

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“…Subsequently, as the wetting layer gets thicker, the elastic or strain energy builds up and is relaxed either through dislocation nucleation or surface roughening, thereby resulting in the formation of islands atop the wetting layer. Hence, in summary, the catalyst for the 2D-to-3D growth transition is the relaxation of the strain energy which increases with increasing thickness of the mismatched epitaxial layers, and the occurrence of 2D-to-3D transitions has been observed in a myriad of mismatched heteroepitaxial systems such as InAs/InGaAs/GaAs [69], InAlAs/AlGaAs [70], and InAs/InP [71].…”

Section: Vapour-phasementioning

confidence: 99%

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Nanoscale self-assembly: concepts, applications and challenges

2022

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Self-assembly offers unique possibilities for fabricating nanostructures, with different morphologies and properties, typically from vapor or liquid phase precursors. Molecular units, nanoparticles, biological molecules and other discrete elements can spontaneously organise or form via interactions at the nanoscale. Currently, nanoscale self-assembly finds applications in a wide variety of areas including carbon nanomaterials and semiconductor nanowires, semiconductor heterojunctions and superlattices, the deposition of quantum dots, drug delivery, such as mRNA-based vaccines, and modern integrated circuits and nanoelectronics, to name a few. Recent advancements in drug delivery, silicon nanoelectronics, lasers and nanotechnology in general, owing to nanoscale self-assembly, coupled with its versatility, simplicity and scalability, have highlighted its importance and potential for fabricating more complex nanostructures with advanced functionalities in the future. This review aims to provide readers with concise information about the basic concepts of nanoscale self-assembly, its applications to date, and future outlook. First, an overview of various self-assembly techniques such as vapour deposition, colloidal growth, molecular self-assembly and directed self-assembly/hybrid approaches are discussed. Applications in diverse fields involving specific examples of nanoscale self-assembly then highlight the state of the art and finally, the future outlook for nanoscale self-assembly and potential for more complex nanomaterial assemblies in the future as technological functionality increases.

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Section: Vapour-phasementioning

confidence: 99%

“…Park et al grew self-assembled InAs QDs on GaAs substrates using the S-K growth method at about 500 °C [69]. Initial growth was via the layer-by-layer process, however, as the thickness of the epitaxial layer increased, a transition to the island growth process occurred to lower the strain energy.…”

Section: Vapour-phasementioning

confidence: 99%