Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-18T21:21:45.499Z Has data issue: false hasContentIssue false
  • English
  • Français

Photonic Crystal Fiber for Efficient Raman Scattering of Thiol-Capped Quantum Dots in Aqueous Solution

Published online by Cambridge University Press:  11 July 2011

Jacky S. W. Mak ,
Abdiaziz A. Farah ,
Feifan Chen  and
Amr S. Helmy
Jacky S. W. Mak
Affiliation:
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, M5S 3G4 Canada
Abdiaziz A. Farah
Affiliation:
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, M5S 3G4 Canada
Feifan Chen
Affiliation:
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, M5S 3G4 Canada
Amr S. Helmy
Affiliation:
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, M5S 3G4 Canada
Get access

Abstract

A novel hollow-core photonic crystal fiber platform was used for the first time to observe clear vibrational modes of the CdTe core, CdS0.7Te0.3 interface, and carboxylate-metal complexes in dilute aqueous CdTe quantum dot (QD) solutions. These modes demonstrate the presence of crystalline cores, defects and surface passivation responsible for photoluminescent efficiency and stability. In addition, 3-mercaptopropionic acid (MPA)-capped QDs show higher crystallinity and stability than those capped with thioglycolic acid (TGA) and 1-thioglycerol (TG). This detailed, non-destructive characterization was carried out using Raman spectroscopy for solutions with QD concentration of 2 mg/mL, which is similar to their concentration during synthesis process. This platform can be extended to the in-situ studies of any colloidal nanoparticles and aqueous solutions of relevant biological samples using Raman spectroscopy.

Keywords

sensorRaman spectroscopynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1346: Symposium AA – Micro- and Nanofluidic Systems for Materials Synthesis, Device Assembly and Bioanalysis , 2011 , mrss11-1346-aa02-03
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. John, M. F., Meas. Sci. Technol. 15, 1120 (2004).Google Scholar
2. Yan, H., Gu, C., Yang, C., Liu, J., Jin, G., Zhang, J., Hou, L. and Yao, Y., Appl. Phys. Lett. 89, 204101–204103 (2006).Google Scholar
3. Yang, X., Shi, C., Wheeler, D., Newhouse, R., Chen, B., Zhang, J. Z. and Gu, C., J. Opt. Soc. Am. A 27, 977–984 (2010).Google Scholar
4. Klayman, D. L. and Griffin, T. S., J. Am. Chem. Soc. 95, 197–199 (1973).Google Scholar
5. Zhenyu, G., Zou, L., Fang, Z., Zhu, W. and Zhong, X., Nanotechnology 19, 135604 (2008).Google Scholar
6. Irizar, J., Dinglasan, J., Goh, J. B., Khetani, A., Anis, H., Anderson, D., Goh, C. and Helmy, A. S., IEEE J. Sel. Top. Quant. 14, 1214–1222 (2008).Google Scholar
7. Schreder, B., Schmidt, T., Ptatschek, V., Spanhel, L., Materny, A. and Kiefer, W., J. Cryst. Growth 214-215, 782–786 (2000).Google Scholar
8. Nakamoto, K., Infrared and Raman Spectra of Inorganic and Coordination Compounds: Part B. (Wiley, Hoboken, 2009) pp. 64–65.Google Scholar
9. Zhang, H., Wang, D. and Möhwald, H., Angew. Chem. Int. Edit. 45, 748–751 (2006).Google Scholar