@inproceedings{5d26dcd71fb04197840c3b89ad709441,
title = "(Invited) development of nanoporous structures and oscillatory behavior during anodization of n-InP in alkaline electrolytes",
abstract = "In the early stages of anodization of n-InP in KOH, isolated nanoporous domains form and eventually merge into a continuous layer. SEM and TEM cross-sections show clear evidence that these have the shape of truncated tetrahedrons and result from preferential pore progagation along the <111>A directions. We propose a three-step model of electrochemical nanopore formation that explains how crystallographically oriented etching can occur even though the rate-determining process occurs only at pore tips. The rate-determining Step 1 is the generation of holes at pore tips. If Step 2 (hole diffusion) is faster than Step 3 (electrochemical reaction) then etching can occur at preferred crystallographic sites, such as phosphorus dangling bonds, leading to pore propagation in preferential directions. Well-defined oscillations are observed under certain conditions when n-InP is anodized in either KOH or (NH4)2S. The oscillations in (NH4)2S, have a symmetric profile and the charge per cycle remains constant over a wide range of conditions: we propose a mechanism based on cyclical changes in the morphology of the InP surface beneath an In2S3 film. The exact mechanism of the oscillatory behavior in KOH is still unclear.",
author = "Buckley, {D. N.} and N. Quill and C. O'Dwyer and T. Melly and E. Harvey and Lynch, {R. P.}",
note = "Publisher Copyright: {\textcopyright} The Electrochemical Society.; Pacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200 ; Conference date: 04-10-2020 Through 09-10-2020",
year = "2020",
doi = "10.1149/09802.0089ecst",
language = "English",
series = "ECS Transactions",
publisher = "IOP Publishing Ltd",
number = "2",
pages = "89--106",
editor = "P. Granitzer and D. Lockwood and H. Habazaki and S. Virtanen and H. Imahori",
booktitle = "PRiME 2020",
edition = "2",
}