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Oxidation Induced Giant Modulation in the Luminescence of Colloidal Amorphous Porous Silicon Nanoparticles

Published online by Cambridge University Press:  11 May 2015

Jehad K. El Demellawi ,
Dalaver H. Anjum  and
Sahraoui Chaieb
Jehad K. El Demellawi
Affiliation:
Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, K.S.A.
Dalaver H. Anjum
Affiliation:
Imaging and Characterization Laboratory, King Abdullah University of Science and Technology, Thuwal, K.S.A.
Sahraoui Chaieb
Affiliation:
Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, K.S.A.
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Abstract

The emission of crystalline silicon nanoparticles as well as nanowires can be tuned by varying their diameters. The diameter selection is achieved via a difficult chemical procedure that necessitates filtration which cannot be easily scaled up. Herein, we report a novel approach for producing and tuning the emission of freestanding colloidal of amorphous porous silicon nanoparticles (which should not be confused with bulk amorphous silicon nor with porous silicon) via a controlled oxidation without relying on size of nanoparticles. This oxidation increases local strain in the disordered network that causes orbital interactions which modifies the band-gap but a new hybridization.

Keywords

absorptionelectron energy loss spectroscopy (EELS)Raman spectroscopy
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1748: Symposium II – Semiconductor Nanocrystals, Plasmonic Metal Nanoparticles, and Metal-Hybrid Structures , 2015 , mrsf14-1748-ii05-22
Copyright
Copyright © Materials Research Society 2015 

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