Semiconductor Quantum Dots Interacting with Adsorbed Chiral Molecules

The coating of semiconductor quantum dots with chiral molecules induces circular dichroism at the dots' exciton transitions. The interaction appears to split the exciton levels. Studies of core-shell semiconductor nanoparticles lead us tot he conclusion that the interaction involves hybridization of valence-band states of the dots with the highest occupied molecular orbitals of the chiral molecules.

Transparent Electrodes Based on Metal Nanowire Films

We develped a wet chemical technique to grow metal nanowire films directly on the substrate of choice. The method uses seeded nanowires growth, where the seed particles can be patterned on the substrate using inkjet printing. The grown nanowires follow the seed pattern. The films are highly flexible and can be use for flexible/stretchable electronics.

Peptide Induced CD at Ag Nanocube Plasmon Resonances

We study peptide induced circular dichroism (CD) at plasmon resonances of silver nanocubes. The CD signal polarity may indicate the adsorbtion orientation of the peptide.

Intrinsically Chiral nanocrystals

We are studying the enantio-selective preparation and chiroptical properties of nanocrystals of inorganic materials with chiral crystal structure, with the aid of chiral surface active molecules.

Inducing Chiroptical Effects in Plasmon Resonances

We are using various combinations of noble metal nanostructures with chiral molecules to induce circular dichroism at the surface plasmon resonances of metal nanostructures and understand the induction mechanism. Such effects may be used for sensing molecular chirality and better understanding of molecule-surface interactions.