Nano Archive

Spectroscopic studies on quantum dots of PbI2

Roy, A. and Sarma, D. D. and Sood, A. K. (1992) Spectroscopic studies on quantum dots of PbI2. Spectrochimica Acta Part A: Molecular Spectroscopy, 48 (11-12). 1779-1787 .

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

We report the preparation of PbI2 clusters of sizes less than 30 Å by colloidal routes and characterization by optical absorption spectra. We show that the blue-shifted absorption spectra are not due to the presence of I−3 ions, as suggested previously, but are characteristic of the clusters present. We also show that similar sized clusters form, though sparingly, on dissolving bulk PbI2 in the solvents. We establish that the stability of a large concentration of these clusters in the colloidal process is due to the presence of excess iodine ions attached to the microcrystallites.

Item Type:Article
Subjects:Physical Science > Quantum phenomena
Material Science > Nanochemistry
Physical Science > Photonics
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4262
Deposited By:JNCASR
Deposited On:03 Apr 2009 06:35
Last Modified:03 Apr 2009 06:35

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