Type

Journal Article

Authors

Nathan Quill
Robert P. Lynch
Colm O'Dwyer
D. Noel Buckley

Subjects

Physics

Topics
transmission electron microscopy tem atomic force microscopy afm anodic formation n inp linear sweep voltammogram lsv scanning electron microscopy sem nanoporosity electrochemistry

Electrochemical formation of nanoporosity in n-InP anodes in KOH (2011)

Abstract We review our recent work on anodic formation of nanoporosity inn-InP in aqueous KOH. Typically, a nanoporous sub-surfaceregion is formed beneath a thin, dense near-surface layer. Atomicforce microscopy (AFM) shows pit formation on the surface in theearlier stages of etching, and transmission electron microscopy(TEM) shows individual nanoporous domains separated from thesurface by a thin InP layer. Each domain develops from a surfacepit. We developed a model based on propagation of pores along the<111>A directions. The model predicts porous domains with atruncated tetrahedral shape and this was confirmed by scanningelectron microscopy (SEM) and TEM. Pores are cylindrical andhave well-developed facets only near their tips. No porous layersare observed at a KOH concentration of 1.1 mol dm -2 or lower.Linear sweep voltammograms (LSVs) show a pronounced anodicpeak corresponding to the formation of the porous region. Wedescribe a technique to deconvolute the effects of potential andtime in LSVs and explain their shape and their relationship toporous layer formation.
Collections Ireland -> University College Cork -> Research Institutes and Centres
Ireland -> University College Cork -> Applied Nanoscience Group - Journal Articles
Ireland -> University College Cork -> Tyndall National Institute
Ireland -> University College Cork -> Applied Nanoscience Group
Ireland -> University College Cork -> Chemistry
Ireland -> University College Cork -> Chemistry - Journal Articles
Ireland -> University College Cork -> College of Science, Engineering and Food Science
Ireland -> University College Cork -> Micro-Nanoelectronics Centre

Full list of authors on original publication

Nathan Quill, Robert P. Lynch, Colm O'Dwyer, D. Noel Buckley

Experts in our system

1
Nathan Quill
University of Limerick
Total Publications: 9
 
2
Robert P. Lynch
University of Limerick
Total Publications: 11
 
3
Colm O'Dwyer
University College Cork
Total Publications: 121
 
4
D. Noel Buckley
University College Cork
Total Publications: 27