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Title:Optical Characterization of Ultrasmall, Hydrogen -Terminated and Carboxyl -Functionalized Silicon Nanoparticles in Aqueous Environments
Author(s):Eckhoff, Dean Alan
Doctoral Committee Chair(s):Gratton, Enrico
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Biophysics, General
Abstract:In the second part, three central elements establish that the carboxyl-functionalized Si-np have excellent potential for use as a luminescent marker in aqueous systems. First, they are shown to be ultrasmall, with a diameter of ∼1 nm, comparable to that of common organic fluorophores. Second, they are shown to have narrow PL in the near-UV with a nearly-symmetric lineshape and a FWHM as small as 30 nm. Third, it is shown that standard chemical means can be used to functionalize the Si-np with carboxyl groups, giving them stability in polar (e.g. aqueous) environments and providing a route for attachment to various biomolecules through their reaction with primary amines. The capability for direct coupling with organic species through a strong and stable Si-C linkage is a defining characteristic of Si-np and offers tremendous flexibility with possible surface passivations and functionalities for this class of luminophores.
Issue Date:2006
Description:115 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
Other Identifier(s):(MiAaPQ)AAI3242839
Date Available in IDEALS:2015-09-25
Date Deposited:2006

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