Results 231 to 240 of about 469,354 (254)

Scaling of the structural characteristics of nanoholes created by local droplet etching

Journal of Applied Physics, 2014
We 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.
C. Heyn, S. Schnüll, W. Hansen
semanticscholar   +2 more sources

Water droplet transport on a nylon mesh with graded structures by facile PMMA spraying and etching process inspired by spider silk

, 2021
Based on the water-collection characteristics of natural spider silk, the nylon mesh with graded structures was fabricated by facile spraying method and etching process to realize the microstructures of curvature gradient and roughness gradient.
Wei Chen, Shanpeng Li, Zhiguang Guo
semanticscholar   +1 more source

Shallow surface etching of organic and inorganic compounds by electrospray droplet impact

Applied Surface Science, 2009
Abstract The electrospray droplet impact (EDI) was applied to bradykinin, polyethylene terephthalate (PET), SiO2/Si, and indium phosphide (InP). It was found that bradykinin deposited on the stainless steel substrate was ionized/desorbed without the accumulation of radiation products.
Kenzo Hiraoka, Daiki Asakawa
exaly   +2 more sources

Nanohole formation on AlGaAs surfaces by local droplet etching with gallium

Journal of Crystal Growth, 2009
; A1. Atomic force microscopy ; A1. Diffusion ; A1. Low-dimensional structures ; A3. Molecular beam epitaxy ; B2. Semiconducting III-V materials We demonstrate the self-assembled generation of nanoholes on AlGaAs surfaces by local droplet etching (LDE).
C. Heyn, A. Stemmann, W. Hansen
semanticscholar   +2 more sources

Sizing Nanoparticle-Covered Droplets by Extrusion through Track-Etch Membranes

Langmuir, 2007
Interfacial 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, Revanur, R, Russell, TP, Emrick, T   +3 more
openaire   +2 more sources

Local Droplet Etching: Self-assembled Nanoholes for Quantum Dots and Nanopillars

, 2013
We review the mechanism and recent applications of the self-organized patterning of semiconductor surfaces by local droplet etching (LDE). LDE is a nanofabrication technique that is applicable in situ during molecular beam epitaxy (MBE) and fully compatible with state-of-the-art MBE systems.
C. Heyn, D. Sonnenberg, W. Hansen
semanticscholar   +2 more sources

Excitonic states in GaAs quantum dots fabricated by local droplet etching

Physical Review B, 2014
A. Graf, D. Sonnenberg, V. Paulava, A. Schliwa, C. Heyn, W. Hansen   +5 more
semanticscholar   +2 more sources

XPS depth profiling of polystyrene etched by electrospray droplet impact

Surface and Interface Analysis, 2010
Abstract 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, Yoshitoki Iijima, Daiki Asakawa, Kenzo Hiraoka   +3 more
openaire   +1 more source

Local etching of nanoholes and quantum rings with InxGa1−x droplets

Journal of Applied Physics, 2009
We study the formation of nanoholes and quantum rings in GaAs and AlGaAs surfaces by local droplet etching with InxGa1−x. The rings are crystallized from droplet material and surround the nanohole openings. In particular, the influence of the In content x on density, diameter, and depth of the nanoholes is investigated.
A. Stemmann, T. Köppen, M. Grave, S. Wildfang, S. Mendach, W. Hansen, Ch. Heyn   +6 more
openaire   +1 more source

GaAs quantum dot molecules filled into droplet etched nanoholes

Journal of Crystal Growth, 2017
Abstract We fabricate self-aligned vertically stacked GaAs quantum dot molecules (QDMs) by filling of self-assembled nanoholes in AlGaAs. The tunable nanoholes are created using local droplet etching (LDE) combining conventional molecular beam epitaxy with self-assembled, lithography-free patterning. The optical emission from single, strain-free QDMs
Ch. Heyn, A. Küster, A. Gräfenstein, A. Ungeheuer, A. Graf, W. Hansen   +5 more
openaire   +1 more source