Gold coated microstructures as a platform for the preparation of semiconductor-based hybrid 3D micro-nano-architectures

• Published in: European physical journal plus Vol. 138; no. 9; p. 827
• Main Authors: Monaico, Eduard V., Ursaki, Veaceslav V., Tiginyanu, Ion M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 21.09.2023; Springer Nature B.V
• Subjects: Applied and Technical Physics; Atomic; Chemical vapor deposition; Complex Systems; Condensed Matter Physics; Crystal growth; Crystals; Deposition; Electrical resistivity; Electrochemistry; Electrodes; Electrolytes; Electroplating; Epitaxial growth; Focus Point on Physics in the Balkans: Perspectives and Challenges; Gallium nitrides; Gold; Gold coatings; Mathematical and Computational Physics; Microstructure; Molecular; Molecular beam epitaxy; Morphology; Nanowires; Optical and Plasma Physics; Organic chemicals; Physics; Physics and Astronomy; Plating; Pulse duration; Regular Article; Substrates; Theoretical; Vapor phase epitaxy; Vapor phases; Germany
• ISSN: 2190-5444; 2190-5444
• DOI: 10.1140/epjp/s13360-023-04462-8

In this paper, three types of microstructures are argued as substrates for electrochemical deposition of Au nanodots. They include: (a) aero-GaN consisting of hollow GaN microtetrapods, (b) microdomains of pores with a controlled design produced by anodization of InP wafers, and (c) patterned microdomains composed of strips with alternating electrical conductivity in GaN crystals grown by hydride vapor phase epitaxy. Uniform deposition of Au nanodots with controlled density is demonstrated by using pulsed electroplating, the voltage pulse width and amplitude as well as the pause between pulses and the conductivity of the substrate serving as adjustable parameters. The morphology of the produced hybrid microarchitectures was investigated by scanning electron microscopy. The explored microstructures are proposed as platforms for the development of complex 3D hybrid micro-nano-architectures via the vapor–liquid–solid deposition of various semiconductor nanowires with Au nanodots as catalysts.