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

Fingerprint

Quantum Dots
Nanoparticles
Semiconductor quantum dots
near fields
quantum dots
nanoparticles
Gold
absorption cross sections
gold
Finite difference time domain method
finite difference time domain method
Dimers
dimers
augmentation

All Science Journal Classification (ASJC) codes

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

Cite this

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
Son, Taehwang ; Kochuveedu, Saji Thomas ; Kim, Dong Ha ; Kim, Donghyun. / Near-field analysis of CdSe quantum dot conjugated core-shell nanoparticle. Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI. SPIE, 2014. (Progress in Biomedical Optics and Imaging - Proceedings of SPIE).
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Son, T, Kochuveedu, ST, Kim, DH & 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, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI, San Francisco, CA, United States, 14/2/3. https://doi.org/10.1117/12.2038885

Near-field analysis of CdSe quantum dot conjugated core-shell nanoparticle. / Son, Taehwang; Kochuveedu, Saji Thomas; Kim, Dong Ha; Kim, Donghyun.

Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XI. SPIE, 2014. 89540V (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8954).

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

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