Functionality properties of complexes of sulfophthalocyanine with semiconductor nanocrystals

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Journal Title
Journal ISSN
Volume Title
Sähkötekniikan korkeakoulu | Master's thesis
Date
2016-08-24
Department
Major/Subject
Micro- and Nanosciences
Mcode
ELEC3037
Degree programme
NanoRad - Master’s Programme in Nano and Radio Sciences (TS2013)
Language
en
Pages
75
Series
Abstract
Currently, research in the biomedical field is one of the most promising and strategically important. Special attention is paid to the use of nanostructured materials as biosensors and new generation drugs. Nanostructures offer great promise in cancer targeting applications due to their unique optical properties. A shining examples of nanostructured materials are semiconductor nanocrystals: quantum dots and quantum rods. Colloidal semiconductor quantum nanocrystals are single crystals of a few nanometers in size (typically about 2-10 nm). In this work an investigation of conditions of phthalocyanine aggregation in complexes with NC’s in aqueous media and dimethyl sulfoxide (DMSO) was performed, in particular, investigation of the effect of the size and shape of the nanocrystals on the phthalocyanine aggregation in complexes. Complexes of CdSe/ZnS nanocrystals with phthalocyanine molecules have been formed via the electrostatic interaction between nanocrystals solubilizer molecules and phthalocyanine. It has been found that, the formation of nanocrystals/ phthalocyanine complexes in aqueous media leads to phthalocyanine aggregation which their relative concentration depends on type of nanocrystals. In contrast complexes in aqueous media, phthalocyanine aggregation wasn’t observed in nanocrystals/ phthalocyanine complexes in DMSO.
Description
Supervisor
Tittonen, Ilkka
Thesis advisor

Keywords
nanocrystals, quantum dots, quantum rods, tetrapyrroles, Förster resonance energy transfer, aggregation
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Citation