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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 5, Iss. 5 — May. 1, 2014
  • pp: 1610–1615

Use of colloidal quantum dots as a digitally switched swept light source for gold nanoparticle based hyperspectral microscopy

Kazunori Hoshino, Pratixa. P. Joshi, Gauri. Bhave, Konstantin V. Sokolov, and Xiaojing Zhang  »View Author Affiliations


Biomedical Optics Express, Vol. 5, Issue 5, pp. 1610-1615 (2014)
http://dx.doi.org/10.1364/BOE.5.001610


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Abstract

We propose a method to utilize colloidal quantum dots (QDs) as a swept light source for hyperspectral microscopy. The use of QD allows for uniform multicolor emission which covers visible-NIR wavelengths. We used 8 colors of CdSe/ZnS and CdTe/ZnS colloidal quantum dots with the peak emission wavelengths from 520 nm to 800 nm. The QDs are packed in a compact enclosure, composing a low-cost, solid-state swept light source that can be easily used in most microscopes. Multicolor emission from the QDs is simply controlled by digitally switching excitation UVLEDs, eliminating the use of mechanically-driven gratings or filters. We used gold nanoparticles as optical markers for hyperspectral microscopy. Due to the effect of localized surface plasmon resonance, gold nanoparticles demonstrate size and shape-dependent absorption spectra. Employed in a standard microscope, the QD light source enabled multispectral absorption imaging of macrophage cells labeled with gold nanorods and nanospheres.

© 2014 Optical Society of America

OCIS Codes
(170.0110) Medical optics and biotechnology : Imaging systems
(170.1530) Medical optics and biotechnology : Cell analysis
(230.3670) Optical devices : Light-emitting diodes
(300.6550) Spectroscopy : Spectroscopy, visible
(110.4234) Imaging systems : Multispectral and hyperspectral imaging
(160.4236) Materials : Nanomaterials

ToC Category:
Microscopy

History
Original Manuscript: February 21, 2014
Revised Manuscript: April 10, 2014
Manuscript Accepted: April 15, 2014
Published: April 18, 2014

Citation
Kazunori Hoshino, Pratixa. P. Joshi, Gauri. Bhave, Konstantin V. Sokolov, and Xiaojing Zhang, "Use of colloidal quantum dots as a digitally switched swept light source for gold nanoparticle based hyperspectral microscopy," Biomed. Opt. Express 5, 1610-1615 (2014)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-5-5-1610


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