Dipartimento di Chimica

Chirality in Plasmonic Nanoparticles and Nanostructures

 Luis M. Liz-Marzán, CIC biomaGUNE (BRTA) and CIBER-BBN, Donostia-San Sebastián, Spain

 

The seminar will be held in La Ginestra Hall, Ed. Cannizzaro (CU014), 25th october at 4.00 pm.

 

Abstract

The field of chirality has seen a strong rejuvenation due to the observation of nanoscale chirality in plasmonic nanoparticles. This lecture will highlight recent advances in the field of plasmonic chirality, including novel methods for the synthesis of optically active plasmonic nanomaterials. The focus will be first directed toward chiral nanostructures formed using biological templates, proteins in particular. After demonstration of the directed self-assembly of gold nanorods on amyloid fibers, as well as the mechanistic understanding of chirality at the nanoscale, a potential application for such nanomaterials will be presented. We propose that plasmon-enhanced chiral signals have great potential for use in the detection and therapy of neurodegenerative disorders.¹

The second part of the lecture will deal with the seeded-growth of chiral features on colloidal nanoparticles. This effect can be achieved by using either thiolated amino acids² or chiral co-surfactants,^3,4 through distinct mechanisms, which can be manipulated to obtain nanoparticles with different chiral features and significant optical activity, which can be tuned through the visible and the near IR.

References

1. J. Kumar, H. Eraña, E. López-Martínez, N. Claes, V.F. Martín, D.M. Solís, S. Bals, A.L. Cortajarena, J. Castilla, L.M. Liz-Marzán, Detection of Amyloid Fibrils in Parkinson's Disease Using Plasmonic Chirality, Proc. Natl. Acad. Sci. USA 2018,  115, 3225-3230.

2. B. Ni, M. Mychinko, S. Gómez-Graña, J. Morales-Vidal, M. Obelleiro-Liz, G. González-Rubio, W. Heyvaert, W. Albrecht, J.M. Taboada, F. Obelleiro, D. Vila-Liarte, X. Zhuo, J. Pérez-Juste, I. Pastoriza-Santos, N. López, H. Cölfen, S. Bals, L.M. Liz-Marzán, Chiral Seeded Growth of Au Nanorods into 4-Fold Twisted Nanoparticles with Plasmonic Optical Activity, Adv. Mater. 2023, 35, 2208299.

3. G. González-Rubio, J. Mosquera, V. Kumar, A. Pedrazo-Tardajos, P. Llombart, D. M. Solís, I. Lobato, E. G. Noya, A. Guerrero-Martínez, J. M. Taboada, F. Obelleiro, L. G. MacDowell, S. Bals, L. M. Liz-Marzán, Micelle-Directed Chiral Seeded Growth on Anisotropic Gold Nanocrystals, Science 2020, 368, 1472-1477.

4. X. Zhuo, M. Mychinko, W. Heyvaert, D. Larios, M. Obelleiro-Liz, J.M. Taboada, S. Bals, L.M. Liz-Marzán, Morphological and Optical Transitions during Micelle-Seeded Chiral Growth on Gold Nanorods. ACS Nano 2022, 16, 19281-19292.