Type

Journal Article

Authors

David A Tanner
Gordon Armstrong
Fathima R. Laffir
John S Fletcher
Jimmy D Moore
Colm O'Dwyer
Naga Vishnu V Mogili
Edward G Chadwick

Subjects

Physics

Topics
germanium porous silicon inp x ray photoelectron spectroscopy layers photoluminescence anodic formation

Compositional characterisation of metallurgical grade silicon and porous silicon nanosponge particles (2013)

Abstract Porous silicon is generally achieved through electro-chemical etching or chemical etching of bulk silicon in hydrofluoric acid based solutions. The work presented here explores the effect of a chemical etching process on a metallurgical grade silicon powder. It is found that the metallurgical grade silicon particles contain surface bound impurities that induce a porous structure formation upon reaction with the chemical etchant applied. The correlation between the resultant porous structure formed due to the material composition is examined in detail. The elemental composition is determined using a combination of X-ray Photoelectron Spectroscopy and Time of Flight Secondary Ion Mass Spectroscopy. The porous structure is analysed using Transmission Electron Microscopy and Scanning Electron Microscopy. Three samples of the silicon particles analysed for this study include an un-etched bulk silicon powder sample and two samples of chemically etched powder. Pore formation within the particles is found to be dependent on the presence, dispersion, and local concentration of surface bound impurities within the starting powder.
Collections Ireland -> University of Limerick -> School of Design
Ireland -> University of Limerick -> Centres Science and Engineering
Ireland -> University of Limerick -> PDT (Product Design &Technology)
Ireland -> University of Limerick -> Physics
Ireland -> University of Limerick -> Faculty of Science and Engineering
Ireland -> University of Limerick -> The Bernal Project
Ireland -> University of Limerick -> Departments Science and Engineering

Full list of authors on original publication

David A Tanner, Gordon Armstrong, Fathima R. Laffir, John S Fletcher, Jimmy D Moore, Colm O'Dwyer, Naga Vishnu V Mogili, Edward G Chadwick

Experts in our system

1
D.A Tanner
University of Limerick
Total Publications: 45
 
2
Gordon Armstrong
University of Limerick
Total Publications: 16
 
3
Fathima R. Laffir
University of Limerick
Total Publications: 26
 
4
Colm O'Dwyer
University College Cork
Total Publications: 121
 
5
Naga Vishnu V Mogili
University of Limerick
Total Publications: 4