Size Effect on the Infrared Spectra of Condensed Media under Conditions of 1D, 2D, and 3D Dielectric Confinement

Handle URI:
http://hdl.handle.net/10754/594227
Title:
Size Effect on the Infrared Spectra of Condensed Media under Conditions of 1D, 2D, and 3D Dielectric Confinement
Authors:
Shaganov, Igor I.; Perova, Tatiana S.; Melnikov, Vasily; Dyakov, Sergey A.; Berwick, Kevin
Abstract:
The effect of dielectric confinement on the peak position of intramolecular and a lattice vibration in the infrared spectra of various condensed media is investigated. Liquid benzene, carbon disulfide, and chloroform, as well as amorphous SiO2 and microcrystalline MgO particles, were characterized in this study. The absorption spectra of organic liquids and aqueous solutions of a silica submicrometer powder were measured under a variety of dielectric confinement configurations using Fourier transform Infrared spectroscopy. A significant shift of the resonant absorption band of liquid mesoparticles has been observed under dielectric confinement, which is in good agreement with model predictions. A corresponding expression for the dielectric loss spectrum of an absorbing composite medium was obtained using a Maxwell-Garnett generalized equation for the cases of one, two, and three-dimensional dielectric confinement in both ordered and disordered thin layers (disks), rods (wires or needles), and spheres of an absorbing medium. The experimental data on peak positions obtained from the infrared spectra of the organic liquids investigated in this work, as well as from the infrared spectra of amorphous quartz spherical particles and rods, are in good agreement with the calculated data. It is shown using simulations of the absorption spectrum of MgO powder that the approach suggested can be applied under certain conditions to the modeling of the spectra of microcrystalline particles of nonspheroidal shape. © 2010 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Shaganov II, Perova TS, Melnikov VA, Dyakov SA, Berwick K (2010) Size Effect on the Infrared Spectra of Condensed Media under Conditions of 1D, 2D, and 3D Dielectric Confinement. The Journal of Physical Chemistry C 114: 16071–16081. Available: http://dx.doi.org/10.1021/jp908680s.
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
7-Oct-2010
DOI:
10.1021/jp908680s
Type:
Article
ISSN:
1932-7447; 1932-7455
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorShaganov, Igor I.en
dc.contributor.authorPerova, Tatiana S.en
dc.contributor.authorMelnikov, Vasilyen
dc.contributor.authorDyakov, Sergey A.en
dc.contributor.authorBerwick, Kevinen
dc.date.accessioned2016-01-19T14:43:50Zen
dc.date.available2016-01-19T14:43:50Zen
dc.date.issued2010-10-07en
dc.identifier.citationShaganov II, Perova TS, Melnikov VA, Dyakov SA, Berwick K (2010) Size Effect on the Infrared Spectra of Condensed Media under Conditions of 1D, 2D, and 3D Dielectric Confinement. The Journal of Physical Chemistry C 114: 16071–16081. Available: http://dx.doi.org/10.1021/jp908680s.en
dc.identifier.issn1932-7447en
dc.identifier.issn1932-7455en
dc.identifier.doi10.1021/jp908680sen
dc.identifier.urihttp://hdl.handle.net/10754/594227en
dc.description.abstractThe effect of dielectric confinement on the peak position of intramolecular and a lattice vibration in the infrared spectra of various condensed media is investigated. Liquid benzene, carbon disulfide, and chloroform, as well as amorphous SiO2 and microcrystalline MgO particles, were characterized in this study. The absorption spectra of organic liquids and aqueous solutions of a silica submicrometer powder were measured under a variety of dielectric confinement configurations using Fourier transform Infrared spectroscopy. A significant shift of the resonant absorption band of liquid mesoparticles has been observed under dielectric confinement, which is in good agreement with model predictions. A corresponding expression for the dielectric loss spectrum of an absorbing composite medium was obtained using a Maxwell-Garnett generalized equation for the cases of one, two, and three-dimensional dielectric confinement in both ordered and disordered thin layers (disks), rods (wires or needles), and spheres of an absorbing medium. The experimental data on peak positions obtained from the infrared spectra of the organic liquids investigated in this work, as well as from the infrared spectra of amorphous quartz spherical particles and rods, are in good agreement with the calculated data. It is shown using simulations of the absorption spectrum of MgO powder that the approach suggested can be applied under certain conditions to the modeling of the spectra of microcrystalline particles of nonspheroidal shape. © 2010 American Chemical Society.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleSize Effect on the Infrared Spectra of Condensed Media under Conditions of 1D, 2D, and 3D Dielectric Confinementen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalThe Journal of Physical Chemistry Cen
dc.contributor.institutionVavilov State Optical Institute, 199034, St. Petersburg, Russian Federationen
dc.contributor.institutionDepartment of Electronic and Electrical Engineering, Trinity College, Dublin 2, Irelanden
dc.contributor.institutionDepartment of Electronic and Communications Engineering, Dublin Institute of Technology, Kevin Street, Dublin 8, Irelanden
kaust.authorMelnikov, Vasilyen
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