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

作者：Xue Junguo; Wang Chungang; Ma Zhanfang^*

来源：Materials Chemistry and Physics, 2007, 105(2-3): 419-425.

DOI：10.1016/j.matchemphys.2007.05.010

• core-shell composite
• polyethyleneimine
• silica nanoparticle
• gold nanoparticle

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 (60-340 nm) 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.

• 出版日期2007-10-15
• 单位首都师范大学; 东北师范大学