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approvedabstract_osi11_dichroism.pdf2015-04-10 06:00:25Francisco Hidalgo

Abstracts

Author: Francisco Hidalgo
Requested Type: Pre-Selected Invited
Submitted: 2015-03-13 10:24:48

Co-authors: C. Noguez

Contact Info:
Institut Català de Nanociència i Nanotecnologia
Campus de la UAB, Edifici ICN2
Bellaterra, Barcelona   08193
Spain

Abstract Text:
Chirality, defined as the impossibility of making coincide the original object with its ideally realized image in a plane mirror, is a geometrical property which exists in multiple organic compounds. Few years ago, this property was also discovered in inorganic compounds, i.e., carbon nanotubes, fullerenes and ligand-protected noble metal nanoparticles (LPNMNP). Chiral compounds are optically active. Hence, circular dichorism (a kind of optical activity) has risen as an important tool to study optical activity in these systems.
Despite the theoretical and experimental efforts done up to now, it is not clear how the morphology of metallic nanoparticle and organic ligand influence chiroptical response of LPNMNP. In this work, using first-principles calculations based on a time-perturbed approximation, we discuss how the chiroptical signal of a highly symmetric silver nanocluster is modified as the number of ligands increases, observing a possibility of gaining control on the chiroptical signal of LPNMNP.

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