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Origin of nanohole formation by etching based on droplet epitaxy
Nanoscale, 2014Creating and manipulating materials at the nanoscale with controllable size, shape and nucleation site is an important task to meet the urgent demands for quantum structures with designed properties. In the last ten years, droplet epitaxy has been emerging as a versatile fabrication method for various complex nanostructures, such as quantum dots ...
Xinlei, Li +6 more
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Local droplet etching of a vicinal InGaAs(111)A metamorphic layer
Applied Surface ScienceWe demonstrated nanopit formation by Ga-assisted local droplet etching technique in InGaAs metamorphic layers grown on vicinal GaAs(111)A substrates. We studied nanopit formation depending on the substrate temperature, Ga flux and Ga amount. The etched pits show a highly symmetrical pyramidal shape with an equilateral triangular base and the edges of ...
Sergio Bietti +2 more
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Fabrication of superhydrophobic aluminum surface by droplet etching and chemical modification
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019Abstract The development of techniques to fabricate superhydrophobic aluminum surfaces is rapidly maturing, yet the problems of high loss of material and complex preparation still persist. To address this, a simple method that combines droplet etching and chemical modification was used to fabricate a superhydrophobic aluminum surface, with a contact ...
Jiliang Mo, ZhiGuang Guo
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GaAs nanopillars by self-assembled droplet etching
Journal of Crystal Growth, 2013Abstract GaAs nanopillars are fabricated using a combination of in situ self-organized local droplet etching of nanoholes in a semiconductor surface, nanohole filling with a different material, and ex situ material selective etching. The structural properties of the pillars are studied with atomic-force microscopy.
Ch. Heyn +5 more
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Functionalization of Droplet Etching for Quantum Rings
2018We give an overview on various types of strain-free semiconductor quantum ring (QR) structures created in a self-assembled fashion with the local droplet etching (LDE) method. LDE is fully compatible with conventional molecular beam epitaxy (MBE) and utilizes liquid Ga or Al droplets which drill nanoholes into semiconductor surfaces.
Christian Heyn +2 more
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Scaling of the structural characteristics of nanoholes created by local droplet etching
Journal of Applied Physics, 2014We study the tuneability of nanoholes created by local droplet etching of AlGaAs surfaces with Al droplets at varied coverage θ of the deposited droplet material and process temperature T. For the contact angle of the as-grown droplets a mean value of 66° is determined, which depends neither on θ nor on T.
Christian Heyn, S Schnüll, W Hansen
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Self-Assembly of Semiconductor Quantum Rings by Local Droplet Etching
Journal of Nanoelectronics and Optoelectronics, 2011We give an overview on the self-assembly and optical properties of strain-free semiconductor quantum rings (QRs) generated by the novel technique local droplet etching (LDE). LDE is fully compatible with conventional molecular beam epitaxy equipment and utilizes liquid metallic droplets which perform a spatially limited drilling and form nanovolcanoes ...
Christian Heyn
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Kinetic model of local droplet etching
Physical Review B, 2011The self-organized in situ drilling of nanoholes into semiconductor surfaces by using liquid metallic droplets during conventional molecular beam epitaxy represents a new degree of freedom for the design of heterostructure devices. A model of this local droplet etching is presented that is based on a core-shell droplet structure.
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Sizing Nanoparticle-Covered Droplets by Extrusion through Track-Etch Membranes
Langmuir, 2007Interfacial segregation of nanoparticles on droplets, such as water droplets in oil, is achieved by mixing or shaking organic solutions of the nanoparticles with water. This typically results in the formation of droplets with a large distribution of sizes, ranging from 10 microm to greater than 200 microm in diameter.
Tangirala, R +3 more
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XPS depth profiling of polystyrene etched by electrospray droplet impact
Surface and Interface Analysis, 2010Abstract The molecular‐level depth profiling of polystyrene (PS) has been performed by using a newly designed electrospray droplet impact (EDI) gun. The multiple charged water droplets with kinetic energy of ∼10 6 eV were irradiated to a bulk and a spin‐coated PS.
Yuji Sakai +3 more
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