29 citations · 123 across the 17 of their papers we have counts for
17 papers
Molecular Beam Epitaxy of AlScN Nanowires: Towards Group-III Nitride Piezoelectric Nanogenerators with Enhanced Response
Adriano Notarangelo, Rudeesun Songmuang, Mostafa Saleh +10
We study the molecular beam epitaxy of self-assembled AlScN nanowires on conductive TiN layers and demonstrate their application in piezoelectric na…
Growth of compositionally uniform layers with low relaxation degree on GaN by molecular beam epitaxy
Jingxuan Kang, Mikel Gómez Ruiz, Duc Van Dinh +7
500-nm-thick layers with 0.05-0.14 are grown using plasma-assisted molecular beam epitaxy, and their properties are assessed by a…
Uniform large-area surface patterning achieved by metal dewetting for the top-down fabrication of GaN nanowire ensembles
Jingxuan Kang, Rose-Mary Jose, Miriam Oliva +6
The dewetting of thin Pt films on different surfaces is investigated as a means to provide the patterning for the top-down fabrication of GaN nanowire ensembles. The transformation…
AlN Nanowire Based Vertically Integrated Piezoelectric Nanogenerators
N. Buatip, T. Auzelle, P. John +8
In this study, detailed analysis of the direct piezo-response of AlN nanowire-based vertically integrated nanogenerators (VINGs) is undertaken as a function of mechanical excitatio…
ScN/GaN(): a new platform for the epitaxy of twin-free metal-semiconductor heterostructures
Philipp John, Achim Trampert, Duc Van Dinh +6
We study the molecular beam epitaxy of rock-salt ScN on the wurtzite GaN() surface. To this end, ScN is grown on free-standing GaN() substrates and self-ass…
Growth kinetics and substrate stability during high-temperature molecular beam epitaxy of AlN nanowires
Philipp John, Mikel Gómez Ruiz, Len van Deurzen +5
We study the molecular beam epitaxy of AlN nanowires between 950 and 1215 °C, well above the usual growth temperatures, to identify optimal growth conditions. The nanowires are gro…
A route for the top-down fabrication of ordered ultrathin GaN nanowires
Miriam Oliva, Vladimir Kaganer, Maximilian Pudelski +5
Ultrathin GaN nanowires (NWs) are attractive to maximize surface effects and as building block in high-frequency transistors. Here, we introduce a facile route for the top-down fab…
Density control of GaN nanowires at the wafer scale using self-assembled SiN patches on sputtered TiN(111)
Thomas Auzelle, Miriam Oliva, Philipp John +3
The self-assembly of heteroepitaxial GaN nanowires using either molecular beam epitaxy (MBE) or metal-organic vapor phase epitaxy (MOVPE) mostly results in wafer-scale ensembles wi…
Interface recombination in Ga- and N-polar GaN/(Al,Ga)N quantum wells grown by molecular beam epitaxy
Thomas Auzelle, Chiara Sinito, Jonas Lähnemann +5
We explore and systematically compare the morphological, structural and optical properties of GaN/(Al,Ga)N multiple quantum wells (MQWs) grown by plasma-assisted molecular beam epi…
External control of GaN band bending using phosphonate self-assembled monolayers
T. Auzelle, F. Ullrich, S. Hietzschold +7
We report on the optoelectronic properties of GaN and surfaces after their functionalization with phosphonic acid derivatives. To analyze the possible correl…
Enhanced radiative efficiency in GaN nanowires grown on sputtered TiN: effects of surface electric fields
T. Auzelle, M. Azadmand, T. Flissikowski +8
GaN nanowires grown by molecular beam epitaxy generally suffer from dominant nonradiative recombination, which is believed to originate from point defects. To suppress the formatio…
Self-assembly of well-separated AlN nanowires directly on sputtered metallic TiN films
Mani Azadmand, Tomas Auzelle, Jonas Lähnemann +7
We demonstrate the self-assembled formation of AlN nanowires by molecular beam epitaxy on sputtered TiN films on sapphire. This choice of substrate allows growth at an exceptionall…
Toward Quantitative Measurements of Piezoelectricity in III-N Semiconductors Nanowires
L. Jaloustre, S. Le-Denmat, T. Auzelle +4
Piezoelectric semiconductor III-Nitride nanostructures have received increasing interest as an alternative material for energy harvesters, sensors, and self-sustainable electronics…
Electronic properties of air-exposed GaN and surfaces after several device processing compatible cleaning steps
Thomas Auzelle, Florian Ullrich, Sebastian Hietzschold +6
We report on the electronic properties of GaN and surfaces after three different and subsequent device processing compatible cleaning steps: HCl etching, ann…
Top-down fabrication of ordered arrays of GaN nanowires by selective area sublimation
Sergio Fernández-Garrido, Thomas Auzelle, Jonas Lähnemann +3
We demonstrate the top-down fabrication of ordered arrays of GaN nanowires by selective area sublimation of pre-patterned GaN(0001) layers grown by hydride vapor phase epitaxy on A…
Absence of quantum-confined Stark effect in GaN quantum disks embedded in (Al,Ga)N nanowires grown by molecular beam epitaxy
C. Sinito, P. Corfdir, C. Pfüller +14
Several of the key issues of planar (Al,Ga)N-based deep-ultraviolet light emitting diodes could potentially be overcome by utilizing nanowire heterostructures, exhibiting high stru…
Cathodoluminescence of stacking fault bound excitons for local probing of the exciton diffusion length in single GaN nanowires
Gilles Nogues, Thomas Auzelle, Martien Den Hertog +2
We perform correlated studies of individual GaN nanowires in scanning electron microscopy combined to low temperature cathodoluminescence, microphotoluminescence, and scanning tran…