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Title: Charge separation across the silica nanoparticle/water interface

Abstract

Aqueous suspensions of silica particles at high concentrations were irradiated with a short pulse of electrons in the presence of scavengers of OH radicals. The scavengers were chosen to minimize their adsorption on the particle surface. It was found that essentially no holes cross the particle/water interface to generate OH radicals. All of the holes that are originally generated by the ionizing radiation in the silica remain in the particle; even at the smallest size used (7-nm diameter). This is contrasted with electrons, which were earlier shown to escape the particles into the water, even at much larger particle sizes. Implications to removal of pollutants and to management of radioactive materials are often cited as motivation for these studies.

Authors:
 [1]; ;  [2]
  1. Argonne National Lab., IL (United States). Chemistry Div.
  2. Univ. of Notre Dame, IN (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
696643
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 103; Journal Issue: 34; Other Information: PBD: 26 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 05 NUCLEAR FUELS; SUSPENSIONS; SILICA; INTERFACES; HYDROXYL RADICALS; CHARGE TRANSPORT; REMEDIAL ACTION; RADIOACTIVE WASTE DISPOSAL

Citation Formats

Dimitrijevic, N.M., Henglein, A., and Meisel, D. Charge separation across the silica nanoparticle/water interface. United States: N. p., 1999. Web. doi:10.1021/jp991378q.
Dimitrijevic, N.M., Henglein, A., & Meisel, D. Charge separation across the silica nanoparticle/water interface. United States. doi:10.1021/jp991378q.
Dimitrijevic, N.M., Henglein, A., and Meisel, D. Thu . "Charge separation across the silica nanoparticle/water interface". United States. doi:10.1021/jp991378q.
@article{osti_696643,
title = {Charge separation across the silica nanoparticle/water interface},
author = {Dimitrijevic, N.M. and Henglein, A. and Meisel, D.},
abstractNote = {Aqueous suspensions of silica particles at high concentrations were irradiated with a short pulse of electrons in the presence of scavengers of OH radicals. The scavengers were chosen to minimize their adsorption on the particle surface. It was found that essentially no holes cross the particle/water interface to generate OH radicals. All of the holes that are originally generated by the ionizing radiation in the silica remain in the particle; even at the smallest size used (7-nm diameter). This is contrasted with electrons, which were earlier shown to escape the particles into the water, even at much larger particle sizes. Implications to removal of pollutants and to management of radioactive materials are often cited as motivation for these studies.},
doi = {10.1021/jp991378q},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
number = 34,
volume = 103,
place = {United States},
year = {1999},
month = {8}
}