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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 6 — Jun. 1, 2011
  • pp: 1610–1625

Near-IR fluorescence and reflectance confocal microscopy for imaging of quantum dots in mammalian skin

Luke J. Mortensen, Christopher E. Glazowski, James M. Zavislan, and Lisa A. DeLouise  »View Author Affiliations


Biomedical Optics Express, Vol. 2, Issue 6, pp. 1610-1625 (2011)
http://dx.doi.org/10.1364/BOE.2.001610


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Abstract

Understanding the skin penetration of nanoparticles (NPs) is an important concern due to the increasing presence of NPs in consumer products, including cosmetics. Technical challenges have slowed progress in evaluating skin barrier and NP factors that contribute to skin penetration risk. To limit sampling error and other problems associated with histological processing, many researchers are implementing whole tissue confocal or multiphoton microscopies. This work introduces a fluorescence and reflectance confocal microscopy system that utilizes near-IR excitation and emission to detect near-IR lead sulfide quantum dots (QDs) through ex vivo human epidermis. We provide a detailed prediction and experimental analysis of QD detection sensitivity and demonstrate detection of QD skin penetration in a barrier disrupted model. The unique properties of near-IR lead-based QDs will enable future studies that examine the impact of further barrier-disrupting agents on skin penetration of QDs and elucidate mechanistic insight into QD tissue interactions at the cellular level.

© 2011 OSA

OCIS Codes
(170.1790) Medical optics and biotechnology : Confocal microscopy
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(160.4236) Materials : Nanomaterials

ToC Category:
Nanotechnology and Plasmonics

History
Original Manuscript: March 21, 2011
Revised Manuscript: May 6, 2011
Manuscript Accepted: May 8, 2011
Published: May 19, 2011

Citation
Luke J. Mortensen, Christopher E. Glazowski, James M. Zavislan, and Lisa A. DeLouise, "Near-IR fluorescence and reflectance confocal microscopy for imaging of quantum dots in mammalian skin," Biomed. Opt. Express 2, 1610-1625 (2011)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-2-6-1610


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