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Degradation of optoelectronic properties of semiconductors by biofluids and mitigation by polymer overlayers
Author(s): Paul Lee Gourley; Robert Guild Copeland; Jimmy D. Cox; Judy Kay Hendricks; Anthony E. McDonald; Sophie L. Peterson; Darryl Y. Sasaki
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Paper Abstract

We are investigating optoelectronic properties of integrated structures comprising semiconductor light-emitting materials for optical probes of microscopic biological systems. Compound semiconductors are nearly ideal light emitters for probing cells and other microorganisms because of their spectral match to the transparency wavelengths of biomolecules. Unfortunately, the chemical composition of these materials is incompatible with the biochemistry of cells and related biofluids. To overcome these limitations, we are investigating functionalized semiconductor surfaces and structures to simultaneously enhance light emission and flow of biological fluids in semiconductor micro cavities. We have identified several important materials problems associated with the semiconductor/biosystem interface. One is the biofluid degradation of electroluminescence by ionic diffusion into compound semiconductors. Ions that diffuse into the active region of a semiconductor light emitter can create point defects that degrade the quantum efficiency of the radiative recombination process. This paper discusses ways of mitigating these problems using materials design and surface chemistry.

Paper Details

Date Published: 21 June 2002
PDF: 9 pages
Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); doi: 10.1117/12.472101
Show Author Affiliations
Paul Lee Gourley, Sandia National Labs. (United States)
Robert Guild Copeland, Sandia National Labs. (United States)
Jimmy D. Cox, Sandia National Labs. (United States)
Judy Kay Hendricks, Sandia National Labs. (United States)
Anthony E. McDonald, Sandia National Labs. (United States)
Sophie L. Peterson, Sandia National Labs. (United States)
Darryl Y. Sasaki, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 4626:
Biomedical Nanotechnology Architectures and Applications
Raymond P. Mariella Jr.; Michelle Palmer; Darryl J. Bornhop; Darryl J. Bornhop; Ramesh Raghavachari; Shuming Nie; Ramesh Raghavachari; Catherine J. Murphy; David A. Dunn; David A. Dunn; Raymond P. Mariella Jr.; Catherine J. Murphy; Dan V. Nicolau; Shuming Nie; Michelle Palmer; Ramesh Raghavachari, Editor(s)

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