By Topic

Whispering gallery mode biosensors using semiconductor quantum dots

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Meissner, K.E. ; Dept. of Biomed. Eng., Texas A&M Univ., College Station, TX ; Allen, A.

We are constructing optically coupled biosensors from microspheres and semiconductor quantum dots (QDs). Detection will be accomplished through the resonance shift of whispering gallery modes (WGMs) in the microspheres as an analyte is adsorbed to the surface of the microsphere. The use of QDs in such a system allows us to remotely couple to the biosensors with an external optical system. Because the QDs have a high quantum yield and a broad absorption band, the biosensors may be excited with a low light flux well outside the spectral detection region. The resonant effect will permit sensitive detection due both to the WGM's narrow spectral linewidths as well as to multiple sampling as light circulates in the resonant cavity. Detection is local to the microsphere surface as changes in index are sampled via the WGM's evanescent field outside the microcavity. Since the microspheres are smaller than many cells, we anticipate that the system will be useful in both in vitro and in vivo environments

Published in:

Sensors, 2005 IEEE

Date of Conference:

Oct. 30 2005-Nov. 3 2005