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Full-Text Articles in Physical Sciences and Mathematics
The Effect Of Dielectric Friction On The Rate Of Charge Separation In Type Ii Znse/Cds Semiconductor Nanorods, Alexander N. Tarnovsky, Nishshanka N. Hewa-Kasakarage, Patrick Z. El-Khoury, Nickolas Schmall, Maria Kirsanova, Alexander Nemchinov, Alexey Bezryadin, Mikhail Zamkov
The Effect Of Dielectric Friction On The Rate Of Charge Separation In Type Ii Znse/Cds Semiconductor Nanorods, Alexander N. Tarnovsky, Nishshanka N. Hewa-Kasakarage, Patrick Z. El-Khoury, Nickolas Schmall, Maria Kirsanova, Alexander Nemchinov, Alexey Bezryadin, Mikhail Zamkov
Chemistry Faculty Publications
The effect of dielectric friction on the rate of charge separation in type II ZnSe/CdS semiconductor nanorods has been investigated using picosecond transient absorption spectroscopy. The spatial separation of an excited electron-hole pair was estimated from the redshift in band edge absorption corresponding to the decrease in the exciton binding energy. The present study identifies a considerable effect of the solvent polarity on the rate of charge separation in semiconductor heterostructures, which should be taken into account when selecting nanorod caging media, such as solvents or polymer matrices. © 2009 American Institute of Physics.