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Applied Physics Letters / Volume 92 / Issue 8 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 92, 081915 (2008); http://dx.doi.org/10.1063/1.2885082 (3 pages)

Phosphorescence characteristics of ruthenium complex as an optical transducer for biosensors

Sean B. Pieper1, Santano P. Mestas1,2, Kevin L. Lear1,2, Zhong Zhong3, and Kenneth F. Reardon3,2

1Electrical & Computer Engineering Department, Colorado State University, Fort Collins, Colorado 80523-1373, USA
2School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado 80523-1376, USA
3Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523-1370, USA

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(Received 16 November 2007; accepted 4 February 2008; published online 27 February 2008)

The saturation intensity, photobleaching, and decay lifetime of tris(4,7-diphenyl-1,10-phenanthroline) ruthenium(II) chloride [Ru(dpp)3] are investigated. The saturation point was estimated to be 11.8 W/cm2 and subsequently measured to be 11.5 W/cm2. Photobleaching of this dye at a peak absorbance equivalence of 6.6 W/cm2 is observed over 2 days resulting in a 14% decrease in intensity within 20 min and 47% decrease over two days yielding an unacceptably short operational lifetime under saturated conditions. Lower optical excitation levels in the application of oxygen sensitive fluorescence type fiber optic enzymatic biosensor systems are required and yield acceptable photobleaching rates.

© 2008 American Institute of Physics

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KEYWORDS and PACS

Keywords

biosensors, fibre optic sensors, optical saturable absorption, phosphorescence, ruthenium compounds

PACS

  • 87.85.fk

    Biosensors

  • 42.50.Gy

    Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption

  • 42.81.Pa

    Sensors, gyros

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2885082

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    K. Matsuda, T. Saiki, H. Saito, and K. Nishi, Appl. Phys. Lett. 76, 73 (2000)APPLAB000076000001000073000001.

    B. F. Howell and M. G. Kuzyk, Appl. Phys. Lett. 85, 1901 (2004)APPLAB000085000011001901000001.


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