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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Poster Session III

CPP 50.32: Poster

Dienstag, 17. März 2020, 14:00–16:00, P1C

CdZnSe/ZnS quantum dots - gold nanoparticle nanostructured complexes and the influence of the ligand length on their optical properties — •Tatiana Kormilina^1,3, Irina Arefina¹, Evgeniia Stepanidenko¹, Danil Kurshanov¹, Aliaksei Dubavik¹, and Elena Ushakova^1,2 — ¹Center of Information Optical Technologies, ITMO University, Saint Petersburg, Russia — ²Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, PR China — ³Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany

Hybrid systems formed from semiconductor nanocrystals and noble metal nanoparticles are widely utilized in development of multicomponent materials for the photonic applications, biological imaging, and solar cell technologies, where these materials can be used as colloidal solutions or solid thin films. Of great importance are not only the nanomaterials themselves, but also the nanostructure of their linkage. In this work we show how optical properties of a semiconductor quantum dot - noble metal nanoparticle complex can depend on the chain length of the binding molecule. We developed a formation procedure for the colloidal complexes based on alloyed CdZnSe/ZnS quantum dots and gold nanoparticles where various mercaptocarboxylic acids are used as the binding molecules. The QD photoluminescence enhancement (up to 3.1) can be achieved by the control of the interparticle distance in colloidal solutions. The influence of the linking molecules on the optical parameters of the nanoparticle complexes is analyzed and compared through the steady-state and time-resolved spectral measurements.