Near-field analysis of CdSe quantum dot conjugated core-shell nanoparticle

Taehwang Son, Saji Thomas Kochuveedu, Dong Ha Kim, Donghyun Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We have investigated near field distribution and absorption cross-section of CdSe quantum dot (QD) conjugated gold nanoparticles using three-dimensional finite-difference time-domain method. A gold nanoparticle core was modeled with a different SiO2 shell thickness and surface density of QDs. Absorption cross-section was found to be proportionate to the shell thickness and the QD surface density. In regard to the absorption by a single QD, either nanoparticle-QD coupling or QD-QD coupling was dominant depending on the surface density. Moreover, shell thickness weakens the coupling and the absorption of a single QD. Finally, enhanced absorption by a QD-conjugated nanoparticle dimer structure is also reported as a result of field enhancement between NPs assisted by QDs.

Original languageEnglish
Title of host publicationNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI
PublisherSPIE
ISBN (Print)9780819498670
DOIs
Publication statusPublished - 2014 Jan 1
EventNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI - San Francisco, CA, United States
Duration: 2014 Feb 32014 Feb 6

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8954
ISSN (Print)1605-7422

Other

OtherNanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI
CountryUnited States
CitySan Francisco, CA
Period14/2/314/2/6

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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    Son, T., Kochuveedu, S. T., Kim, D. H., & Kim, D. (2014). Near-field analysis of CdSe quantum dot conjugated core-shell nanoparticle. In Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI [89540V] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8954). SPIE. https://doi.org/10.1117/12.2038885