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Gas Sensor Materials Based on Semiconductor Nanocrystal / Polymer Composite Films

Published online by Cambridge University Press:  26 February 2011

Andrew M Leach  and
Radislav A Potyrailo
Andrew M Leach
Affiliation:
leach@research.ge.com, General Electric Global Research, Chem Bio Sensor Laboratory, One Research Circle, Niskayuna, NY, 12309, United States, 518-387-4754, 518-371-7611
Radislav A Potyrailo
Affiliation:
potyrailo@research.ge.com, General Electric Global Research, Chemical and Biological Sensing Laboratory, United States
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Abstract

High-throughput screening experimentation and multivariate spectral data analysis has been applied to evaluate the gas sensitivity of multi-size CdSe nanocrystals embedded in multiple polymer matrices. We have found that when CdSe nanocrystals of different size (2.8 and 5.6 nm diameter) were incorporated into polymer films, the photoluminescence (PL) response patterns upon laser excitation at 407-nm and exposure to polar and non-polar solvents were unexpectedly different. Additionally, these response patterns were dependent on the nature of polymer. We analyzed the spectral PL response from both sizes of CdSe nanocrystals using multivariate analysis tools. Results of this multivariate analysis demonstrate that a single film with different size CdSe nanocrystals serves as a selective sensor.

Keywords

nanoscalesensorluminescence
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 894: Symposium LL – Combinatorial Methods and Informatics in Materials Science , 2005 , 0894-LL07-07
Copyright
Copyright © Materials Research Society 2006

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References

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