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Open Access Nano Express

Functionalized silicon quantum dots by N-vinylcarbazole: synthesis and spectroscopic properties

Jianwei Ji, Guan Wang, Xiaozeng You* and Xiangxing Xu*

Author Affiliations

State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China

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Nanoscale Research Letters 2014, 9:384  doi:10.1186/1556-276X-9-384

Published: 7 August 2014

Abstract

Silicon quantum dots (Si QDs) attract increasing interest nowadays due to their excellent optical and electronic properties. However, only a few optoelectronic organic molecules were reported as ligands of colloidal Si QDs. In this report, N-vinylcarbazole - a material widely used in the optoelectronics industry - was used for the modification of Si QDs as ligands. This hybrid nanomaterial exhibits different spectroscopic properties from either free ligands or Si QDs alone. Possible mechanisms were discussed. This type of new functional Si QDs may find application potentials in bioimaging, photovoltaic, or optoelectronic devices.

Keywords:
Silicon quantum dots; N-vinylcarbazole; Surface modification; Spectroscopic property