Hybrid plasmonic nano-architectures assembled by DNA hybridization

Published : 15 July 2019

Nanoparticles offers innovative optical properties depending of their material compound, size or shape. In particular, metal nanoparticles have interesting plasmonic properties when incident light induces collective motion of the electrons resulting in enhanced local electric field. Semiconductor nanocrystals (quantum dots) on the other hand can show bright luminescence and wavelength tunability across the visible to near infrared and have already found numerous applications in optoelectronic devices, optical sensors or biological imaging probes. Assembling the two components together can create hybrid structures with unprecedented optical properties.

The goal of the PhD project will be: (i) to develop the self-assembly of hybrid nano-architectures made of semiconductor nanocrystals linked in a well-controlled manner to gold nanorods by means of DNA strands, (ii) to characterize and investigate the nano-optical properties of these hybrid structures, (iii) to explore possible applications with some specific structures. We will aim to exploiting the amplified local electric field at the nanorod tips to modify/enhance the optical properties of neighbouring nanoparticles. The great advantage of these structures is the precise inter-particles distance control by the rigid DNA linkers, enabling in-depth studies of the plasmon-exciton interaction.

With this PhD, the candidate will have the opportunity to work in a broad multidisciplinary environment encompassing chemists, physicists and biologists of two laboratories of INAC, SyMMES (Chemistry) and PHELIQS (Physics).

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