Abstract
We have achieved selective gas sensing based on different size semiconductor nanocrystals incorporated into rationally selected polymer matrices. From the high-throughput screening experiments, we have found that when CdSe nanocrystals of different size (2.8 and 5.6 nm diameter) were incorporated into different types of polymer films, the photoluminescence (PL) response patterns upon laser excitation at 407-nm and exposure to polar and nonpolar solvent vapors 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. The stability of PL response to vapors was evaluated upon 16 h of continuous exposure to laser excitation.
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Acknowledgments
This work has been supported by GE Corporate long-term research funds. Authors are grateful to Fasila Seker for helpful discussions.
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Potyrailo, R.A., Leach, A.M. (2009). High-Throughput Screening of Vapor Selectivity of Multisize CdSe Nanocrystal/Polymer Composite Films. In: Potyrailo, R.A., Mirsky, V.M. (eds) Combinatorial Methods for Chemical and Biological Sensors. Integrated Analytical Systems. Springer, New York, NY. https://doi.org/10.1007/978-0-387-73713-3_5
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DOI: https://doi.org/10.1007/978-0-387-73713-3_5
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