The fabrication of dense and uniform InAs nanowire arrays

A. I. Persson, Linus Fröberg, Lars Samuelson, Heiner Linke

Research output: Contribution to journalArticlepeer-review

35 Citations (SciVal)

Abstract

Nanowires are important candidates for use in future electronics, photonics and thermoelectrics applications. We focus here in particular on nanowires for use in thermoelectric power generation and present a method of fabricating dense uniform InAs nanowire arrays amenable to future incorporation of advanced heterostructures that could further increase the thermoelectric performance of these nanowires. In these applications it will be important to have the nanowires densely packed in order to give an appreciable amount of power output. Here we present the fabrication of such dense arrays, using metal-particle seeded growth and chemical beam epitaxy, where the metal particles are defined by electron beam lithography, metal evaporation and lift-off. We evaluate the potential of chemical beam epitaxy for the growth of dense, freestanding InAs nanowire arrays and describe the process that enabled us to achieve areal packing densities of up to 19% with a variation of only a few per cent in nanowire diameter and height. We close by discussing how even higher areal packing densities can be achieved.
Original languageEnglish
Article number225304
JournalNanotechnology
Volume20
Issue number22
DOIs
Publication statusPublished - 2009

Subject classification (UKÄ)

  • Nano Technology

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