Applications of deep UV LEDs to chemical and biological sensing

Purnendu K. Dasgupta; Qingyang Li; Henryk Temkin; Mary Hagerott Crawford; Arthur J. Fischer; Andrew A. Allerman; Katherine H. A. Bogart; Stephen R. Lee

doi:10.1117/12.567106

20 October 2004 Applications of deep UV LEDs to chemical and biological sensing

Purnendu K. Dasgupta, Qingyang Li, Henryk Temkin, Mary Hagerott Crawford, Arthur J. Fischer, Andrew A. Allerman, Katherine H. A. Bogart, Stephen R. Lee

Author Affiliations +

Proceedings Volume 5530, Fourth International Conference on Solid State Lighting; (2004) https://doi.org/10.1117/12.567106
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

An AlGaN Light-emitting diode (LED) emitting with a peak wavelength at 291 nm and a radiant power of 0.5 mW @ 100 mA was fabricated on a sapphire substrate. A compact gated fluorescence detection system was built using this LED as the excitation light source. We demonstrate that it provides sufficient power using Terbium enhanced fluorescence to detect subnanomolar concentrations of dipicolinic acid (DPA, 2, 6-pyridinedicarboxylic acid), a substance uniquely present in bacterial spores such as that from B. anthracis, providing a basis for convenient early warning detectors. We also describe initial results from a novel approach for biological aerosol detection using long lived fluorescence from a Europium tagged dye that binds to proteins.

Citation Download Citation

Purnendu K. Dasgupta, Qingyang Li, Henryk Temkin, Mary Hagerott Crawford, Arthur J. Fischer, Andrew A. Allerman, Katherine H. A. Bogart, and Stephen R. Lee "Applications of deep UV LEDs to chemical and biological sensing", Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, (20 October 2004); https://doi.org/10.1117/12.567106

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available