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The Influence of Carboxyl Groups on the Photoluminescence of Mercaptocarboxylic Acid-Stabilized CdTe Nanoparticles
Abstract
The CdTe nanoparticles were prepared in aqueous solution using different mercaptocarboxylic acids such as 3-mercaptopropionic acid (MPA) and thioglycolic acid (TGA) as stabilizing agents following the synthetic route described in ref 9. The pH-dependent photoluminescence (PL) of MPA- and TGA-stabilized CdTe nanoparticles was systematically investigated before and after addition of poly(acrylic acid) (PAA) into the CdTe solutions. Experimental results reveal that lowering the pH can increase the PL efficiency of both MPA- and TGA-stabilized CdTe. Moreover, the PL of the CdTe can further be increased in the presence of PAA in low pH range. X-ray photoelectron spectroscopy (XPS) was employed to investigate the interaction between the carboxyl groups from PAA and CdTe nanoparticles which were assembled in polymer matrix by a layer-by-layer self-assembly method to exclude interference from other species in CdTe solutions. XPS results demonstrate that the S/Te ratio of CdTe particles decreases after the addition of PAA, which strongly suggests that PAA can strongly interact with CdTe nanoparticles via the coordination between carboxyl groups and cadmium ions on the particle surface. As a result, the PL efficiency of the mercaptocarboxylic acid-stabilized CdTe nanoparticles is enhanced in acidic range.
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Cites
Shape control of CdSe nanocrystals
Peng, X., Manna, L., Yang, W., Wickham, J., Scher, E., Kadavanich, A., & Alivisatos, A. P. (2000) · Nature · doi:10.1038/35003535 · Cited by 4,487
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Ariga, K., Hill, J. P., & Ji, Q. (2007) · Physical Chemistry Chemical Physics · doi:10.1039/b700410a · Cited by 1,256
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Dalle, K. E., Warnan, J., Leung, J. J., Reuillard, B., Karmel, I. S., & Reisner, E. (2019) · Chemical Reviews · doi:10.1021/acs.chemrev.8b00392 · Cited by 912
Grabolle, M., Spieles, M., Lesnyak, V., Gaponik, N., Eychmüller, A., & Resch-Genger, U. (2009) · Analytical Chemistry · doi:10.1021/ac900308v · Cited by 630
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Self-citationRecent Advances in Quantum Dot Surface Chemistry
Hines, D. A., & Kamat, P. V. (2014) · ACS Applied Materials & Interfaces · doi:10.1021/am405196u · Cited by 366
Metadata
- Authors
- Zhang, H., Zhou, Z., Yang, B., & Gao, M.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-12-10
- Volume
- 107
- Issue
- 1
- Pages
- 8-13
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2110309171
- Cited by
- 582
- References
- 2
- FWCI
- 6.78
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhang, H., Zhou, Z., Yang, B., & Gao, M. (2003). The Influence of Carboxyl Groups on the Photoluminescence of Mercaptocarboxylic Acid-Stabilized CdTe Nanoparticles. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp025910c
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