Interaction between semiconductor nanocrystals, cadmium telluride quantum dots (CdTe QDs) capped with mercaptosuccinic acid (MSA) and metallothionein (MT) was investigated. MSA-capped CdTe QDs were synthesized in aqueous solution. Mixture of MT and MSA-capped CdTe QDs has been investigated by various analytical methods as follows: tris-tricine gel electrophoresis, fluorescence evaluation and electrochemical detection of catalysed hydrogen evolution. The obtained results demonstrate that MSA-capped CdTe QDs and MT do not create firmly bound stabile complex. However, weak electrostatic interactions contribute to the interaction of MT with MSA-capped CdTeQDs. It can be concluded that QDs size influences the QDs and MT interaction. The smallest QDs had the highest affinity to MT and vice versa.

Central European Institute of Technology Brno University of Technology Technicka 3058 10 European Union CZ 616 00 Brno Czech Republic; Department of Pathological Physiology Faculty of Medicine Masaryk University European Union Brno Czech Republic

Department of Chemistry and Biochemistry Mendel University in Brno Zemedelska 1 European Union CZ 613 00 Brno Czech Republic; Central European Institute of Technology Brno University of Technology Technicka 3058 10 European Union CZ 616 00 Brno Czech Republic

Materials Research Centre Faculty of Chemistry Brno University of Technology Purkynova 118 European Union CZ 612 00 Brno Czech Republic

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