Abstract
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.
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