Covalent assembly of silver nanoparticles on hydrogen-terminated silicon surface

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• 作者：Om P. Khatri ; Takashi Ichii ; Kuniaki Murase ; Masayuki Kanehara ; Toshiharu Teranishi ; Hiroyuki Sugimura
• 关键词：Silver nanoparticles ; Hydrogen-terminated silicon ; Thermal hydrosilylation ; Covalent assembly
• 刊名：Journal of Colloid and Interface Science
• 出版年：2012
• 出版时间：15 September, 2012
• 年：2012
• 卷：382
• 期：1
• 页码：22-27
• 全文大小：869 K

文摘

Synthesis of ¦Ø-alkenyl-terminated silver nanoparticles (AgNPs) and then their immobilization on a hydrogen-terminated silicon surface in two-dimensional arrangement through covalent interaction are demonstrated. The thermal-induced hydrosilylation at mild conditions facilitate nanoparticles assembly through interaction between terminal alkenyl (CH₂CH) groups of AgNPs and hydrogen-terminated silicon surface. The assembly of AgNPs on a silicon surface is characterized by FESEM and XPS. Adequate coating of 10-undecene-1-thiol (UDT) on AgNPs and mild temperature hydrosilylation impede the fusion or aggregation of nanoparticles, while they immobilized on a silicon surface, which is very crucial to preserve the discrete entities of nanoparticles. This elegant and facile approach provides stable monolayer of AgNPs with very good coverage area and promises potential to fabricate electronic devices and solar cells, where nanoparticles needs to be directly attached to the silicon surface without an interfacial oxide thin film.