Measuring local quantum yield of photoluminescence and phototransformations with laser scanning microscope
Abstract
Measurement of local quantum yields for the photoluminescence of semiconductor nanocrystals (quantum dots) and photoinduced transformations of dye molecules in polymer films is demonstrated using a laser scanning microscope capable of mapping luminescence spectra and intensities of transmitted laser light. The confocal scanning microscope (Zeiss LSM710) was applied for both the induction of photochemical transformations and measurement The luminescence quantum yield values for quantum dots in different locations of a polymer film were found to differ, ostensibly depending on their aggregation. To measure photoisomerization quantum yield, the effects of scanning a tiny area of a polymer film with a focused beam on the intensities of luminescence and transmitted light were monitored.
Supporting agencies: The authors gratefully acknowledge the financial support of this work from the Ministry of Education and Science of the Russian Federation (Grant No. 14.B25.31.0002) and the Russian Foundation for Basic Research (Grants No. 12-02-01263 and No. 12-02-00938)
About the Authors
V. V. Zakharov
ITMO University; Optec LLC
Russian Federation
Russian Federation
St. Petersburg
M. A. Baranov
ITMO University
Russian Federation
Russian Federation
St. Petersburg
A. S. Zlatov
ITMO University
Russian Federation
Russian Federation
St. Petersburg
A. V. Veniaminov
ITMO University
Russian Federation
Russian Federation
St. Petersburg
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Review
For citations:
Zakharov V.V., Baranov M.A., Zlatov A.S., Veniaminov A.V. Measuring local quantum yield of photoluminescence and phototransformations with laser scanning microscope. Nanosystems: Physics, Chemistry, Mathematics. 2014;5(6):811-819.
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