Multiple Hydrogen-Bond-Assisted Self-Assembly of Semiconductor Nanocrystals on Silicon Surfaces and Nanowires

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• 作者：Kai Huang ; Olivier Renault ; Jean-Pierre Simonato ; Benjamin Grvin ; Emmanuelle Rouvire ; Julia De Girolamo ; Peter Reiss ; Renaud Demadrille ; Hadjar Benmansour
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：December 24, 2009
• 年：2009
• 卷：113
• 期：51
• 页码：21389-21395
• 全文大小：336K
• 年卷期：v.113,no.51(December 24, 2009)
• ISSN：1932-7455

文摘

We report a versatile and modular approach to assemble a monolayer of semiconductor nanocrystals on silicon surfaces. Bifunctional molecules containing at one end a tripod allylic anchor group, which allows robust attachment on Si−H terminated surfaces, and at the other end a group able to participate in multiple hydrogen bonding are used for the assembly of small CdSe nanocrystals on flat silicon and silicon nanowires. The diaminotriazine−thymine pair was used as the hydrogen-bonding pair. The obtained structures (on nanowires and 2D silicon surfaces) are characterized using infrared spectroscopy, X-ray photoelectron spectroscopy, optical microscopy, and non-contact AFM. We demonstrate that the chosen strategy is a powerful approach to modify the chemical and physical properties of nanowires.