A facile method to prepare a series of SiO2@Au core/shell structured nanoparticles

A facile method to prepare a series of SiO2@Au core/shell structured nanoparticles

This paper reports a systematic investigation of the attachment of different sized gold nanoparticles (3.5-32nm) to the polyethyleneimine (PEI) and 3-aminopropyltrimethoxysilane (APTMS)-functionalized, respectively, surfaces of different sized silica nanoparticles (60-340nm) at room temperature. Fun...

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Veröffentlicht in:Materials chemistry and physics 2007-10, Vol.105 (2-3), p.419-425
Hauptverfasser: Xue, Junguo, Wang, Chungang, Ma, Zhanfang
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creator Xue, Junguo
Wang, Chungang
Ma, Zhanfang
description This paper reports a systematic investigation of the attachment of different sized gold nanoparticles (3.5-32nm) to the polyethyleneimine (PEI) and 3-aminopropyltrimethoxysilane (APTMS)-functionalized, respectively, surfaces of different sized silica nanoparticles (60-340nm) at room temperature. Functionalization of the surfaces of silica nanoparticles with PEI or APTMS has a profound influence on the attachment gold nanoparticles. While PEI-functionalized silica surfaces bound the midnanometer gold nanoparticles (13-32nm), APTMS-functionalized silica surfaces did not. A series of different silica-gold core-shell composites were characterized using transmission electron microscopy (TEM) and UV-vis absorbance spectra.
doi_str_mv 10.1016/j.matchemphys.2007.05.010
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title A facile method to prepare a series of SiO2@Au core/shell structured nanoparticles
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