Fabrication and Characterization of Solid PbI2 Nanocrystals.

Lead iodide nanoparticles are synthesized in reverse micelle solution of AOT/H2O/n-heptane. Optical absorption spectra and TEM analysis indicated the formation of crystalline particles with an average radius of 1.5 nm, which is less than the Bohr radius of the exciton (1.9 nm) in bulk PbI2. Using th...

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Main Authors: Kasi, Gopi K., Dollahon, Norman, R., Ahmadi, Temer S.
Format: Villanova Faculty Authorship
Language:English
Published: 2007
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spelling Fabrication and Characterization of Solid PbI2 Nanocrystals.
Kasi, Gopi K.
Dollahon, Norman, R.
Ahmadi, Temer S.
Lead iodide nanoparticles are synthesized in reverse micelle solution of AOT/H2O/n-heptane. Optical absorption spectra and TEM analysis indicated the formation of crystalline particles with an average radius of 1.5 nm, which is less than the Bohr radius of the exciton (1.9 nm) in bulk PbI2. Using theoretical models and optical spectra of quantum confined PbI2 nanoparticles, a radius of 1.5 nm and a thickness of 1.7 nm was calculated, which are in full agreement with the TEM results. Particles were isolated from the dispersed medium and were analysed by powder XRD and Raman spectroscopy, indicating the formation of a predominantly 2H-PbI2 polytype. This work presents the first case of fully isolated, fully characterized solid nanoparticles of PbI2. It also presents XRD and Raman spectrum for the first time for PbI2 nanoparticles of intermediate quantum confinement.
2007
Villanova Faculty Authorship
vudl:172999
Journal of Physics D: Applied Physics 40(6), March 2007, 1778–1783.
en
dc.title_txt_mv Fabrication and Characterization of Solid PbI2 Nanocrystals.
dc.creator_txt_mv Kasi, Gopi K.
Dollahon, Norman, R.
Ahmadi, Temer S.
dc.description_txt_mv Lead iodide nanoparticles are synthesized in reverse micelle solution of AOT/H2O/n-heptane. Optical absorption spectra and TEM analysis indicated the formation of crystalline particles with an average radius of 1.5 nm, which is less than the Bohr radius of the exciton (1.9 nm) in bulk PbI2. Using theoretical models and optical spectra of quantum confined PbI2 nanoparticles, a radius of 1.5 nm and a thickness of 1.7 nm was calculated, which are in full agreement with the TEM results. Particles were isolated from the dispersed medium and were analysed by powder XRD and Raman spectroscopy, indicating the formation of a predominantly 2H-PbI2 polytype. This work presents the first case of fully isolated, fully characterized solid nanoparticles of PbI2. It also presents XRD and Raman spectrum for the first time for PbI2 nanoparticles of intermediate quantum confinement.
dc.date_txt_mv 2007
dc.format_txt_mv Villanova Faculty Authorship
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dc.source_txt_mv Journal of Physics D: Applied Physics 40(6), March 2007, 1778–1783.
dc.language_txt_mv en
author Kasi, Gopi K.
Dollahon, Norman, R.
Ahmadi, Temer S.
spellingShingle Kasi, Gopi K.
Dollahon, Norman, R.
Ahmadi, Temer S.
Fabrication and Characterization of Solid PbI2 Nanocrystals.
author_facet Kasi, Gopi K.
Dollahon, Norman, R.
Ahmadi, Temer S.
dc_source_str_mv Journal of Physics D: Applied Physics 40(6), March 2007, 1778–1783.
format Villanova Faculty Authorship
author_sort Kasi, Gopi K.
dc_date_str 2007
dc_title_str Fabrication and Characterization of Solid PbI2 Nanocrystals.
description Lead iodide nanoparticles are synthesized in reverse micelle solution of AOT/H2O/n-heptane. Optical absorption spectra and TEM analysis indicated the formation of crystalline particles with an average radius of 1.5 nm, which is less than the Bohr radius of the exciton (1.9 nm) in bulk PbI2. Using theoretical models and optical spectra of quantum confined PbI2 nanoparticles, a radius of 1.5 nm and a thickness of 1.7 nm was calculated, which are in full agreement with the TEM results. Particles were isolated from the dispersed medium and were analysed by powder XRD and Raman spectroscopy, indicating the formation of a predominantly 2H-PbI2 polytype. This work presents the first case of fully isolated, fully characterized solid nanoparticles of PbI2. It also presents XRD and Raman spectrum for the first time for PbI2 nanoparticles of intermediate quantum confinement.
title Fabrication and Characterization of Solid PbI2 Nanocrystals.
title_full Fabrication and Characterization of Solid PbI2 Nanocrystals.
title_fullStr Fabrication and Characterization of Solid PbI2 Nanocrystals.
title_full_unstemmed Fabrication and Characterization of Solid PbI2 Nanocrystals.
title_short Fabrication and Characterization of Solid PbI2 Nanocrystals.
title_sort fabrication and characterization of solid pbi2 nanocrystals.
publishDate 2007
normalized_sort_date 2007-01-01T00:00:00Z
language English
collection_title_sort_str fabrication and characterization of solid pbi2 nanocrystals.
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