Development of highly luminescent and cytocompatible near-IR-emitting aqueous Ag2S quantum dots

Ibrahim Hocaoglu; M. Natali Çizmeciyan; Rengin Erdem; Can Ozen; Adnan Kurt; Alphan Sennaroglu; Havva Yagci Acar

doi:10.1039/C2JM31959D

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Development of highly luminescent and cytocompatible near-IR-emitting aqueous Ag₂S quantum dots†

Ibrahim Hocaoglu,^a M. Natali Çizmeciyan,^a Rengin Erdem,^b Can Ozen,^b Adnan Kurt,^c Alphan Sennaroglu^ad and Havva Yagci Acar*^ae

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* Corresponding authors

^a Koc University, Graduate School of Materials Science and Engineering, Rumelifeneri Yolu, Sarıyer, Istanbul, Turkey
E-mail: fyagci@ku.edu.tr
Fax: +90 2123381559
Tel: +90 2123381742

^b Biotechnology Dept., Center of Excellence in Biomaterials and Tissue Engineering (BIOMATEN) and Central Laboratory, Middle East Technical University, Ankara, Turkey

^c Teknofil, Inc., Zekeriyakoy, Istanbul, Turkey

^d Koc University, Department of Physics, Rumelifeneri Yolu, Sarıyer, Istanbul, Turkey

^e Koc University, Department of Chemistry, Rumelifeneri Yolu, Sarıyer, Istanbul, Turkey

Abstract

Colloidally stable and highly luminescent near-IR emitting Ag₂S quantum dots (NIRQDs) were prepared by a very simple aqueous method using 2-mercaptopropionic acid (2MPA) as a coating. Emission of Ag₂S-2MPA NIRQDs can be tuned between 780 and 950 nm. These NIRQDs have photoluminescence quantum yields (PLQY) around 7–39% and exhibit excellent cytocompatibility even at 600 μg mL⁻¹ in NIH/3T3 cells. With such improved properties, Ag₂S-2MPA NIRQDs have a great potential in practical bio-applications.

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Article information

DOI: https://doi.org/10.1039/C2JM31959D
Article type: Paper
Submitted: 29 Mar 2012
Accepted: 30 May 2012
First published: 22 Jun 2012

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J. Mater. Chem., 2012,22, 14674-14681

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Development of highly luminescent and cytocompatible near-IR-emitting aqueous Ag₂S quantum dots

I. Hocaoglu, M. N. Çizmeciyan, R. Erdem, C. Ozen, A. Kurt, A. Sennaroglu and H. Y. Acar, J. Mater. Chem., 2012, 22, 14674 DOI: 10.1039/C2JM31959D

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Journal of Materials Chemistry