Issue 7, 2014
From the journal:

New Journal of Chemistry

Facile fabrication of OA-POSS modified near-infrared-emitting CdSeTe alloyed quantum dots and their bioapplications

Xue Zhao,a   Weijia Zhang,a   Yongzhong Wu,*a   Hongzhi Liub  and  Xiaopeng Hao*a  

* Corresponding authors

a State Key Laboratory of Crystal Materials, Shandong University, 27 Shandanan Road, Jinan 250100, P. R. China
E-mail: wuyz@sdu.edu.cn, xphao@sdu.edu.cn

b Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, P. R. China

Abstract

Highly biocompatible near-infrared-emitting CdSeTe alloyed quantum dots (QDs) were fabricated in aqueous medium with octa-aminopropyl polyhedral oligomeric silsesquioxane (OA-POSS) as the capping agent. By changing the size and composition of CdSeTe alloyed QDs the fluorescence emission peak reached the near infrared (NIR) region (681 nm) with a photoluminescent quantum yield (QY) of 26.4%. POSS–CdSeTe QDs were prepared by conjugating OA-POSS to CdSeTe QDs through condensation reaction utilizing EDC. And the optical properties of CdSeTe QDs were retained with improved biocompatibility. Furthermore, the as-prepared NIR-emitting POSS–CdSeTe alloyed QDs have been successfully applied to SiHa cell imaging, which demonstrates their promising applications in the biomedical field.

Graphical abstract: Facile fabrication of OA-POSS modified near-infrared-emitting CdSeTe alloyed quantum dots and their bioapplications

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Article information

DOI
https://doi.org/10.1039/C4NJ00322E
Article type
Paper
Submitted
04 Mar 2014
Accepted
05 May 2014
First published
07 May 2014

New J. Chem., 2014,38, 3242-3249

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Facile fabrication of OA-POSS modified near-infrared-emitting CdSeTe alloyed quantum dots and their bioapplications

X. Zhao, W. Zhang, Y. Wu, H. Liu and X. Hao, New J. Chem., 2014, 38, 3242 DOI: 10.1039/C4NJ00322E

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