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Heyvaert W, Pedrazo-Tardajos A, Kadu A, Claes N, González-Rubio G, Liz-Marzán LM, Albrecht W, Bals S. Quantification of the Helical Morphology of Chiral Gold Nanorods. ACS MATERIALS LETTERS 2022; 4:642-649. [PMID: 35400146 PMCID: PMC8986031 DOI: 10.1021/acsmaterialslett.2c00055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/02/2022] [Indexed: 05/26/2023]
Abstract
Chirality in inorganic nanoparticles and nanostructures has gained increasing scientific interest, because of the possibility to tune their ability to interact differently with left- and right-handed circularly polarized light. In some cases, the optical activity is hypothesized to originate from a chiral morphology of the nanomaterial. However, quantifying the degree of chirality in objects with sizes of tens of nanometers is far from straightforward. Electron tomography offers the possibility to faithfully retrieve the three-dimensional morphology of nanomaterials, but only a qualitative interpretation of the morphology of chiral nanoparticles has been possible so far. We introduce herein a methodology that enables us to quantify the helicity of complex chiral nanomaterials, based on the geometrical properties of a helix. We demonstrate that an analysis at the single particle level can provide significant insights into the origin of chiroptical properties.
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Affiliation(s)
- Wouter Heyvaert
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, 2020 Antwerp, Belgium
| | | | - Ajinkya Kadu
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, 2020 Antwerp, Belgium
| | - Nathalie Claes
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, 2020 Antwerp, Belgium
| | - Guillermo González-Rubio
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014, Donostia-San
Sebastián, Spain
- Physical
Chemistry Department, University of Konstanz, Universitätsstraße 10,
Box 714, 78457 Konstanz, Germany
| | - Luis M. Liz-Marzán
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014, Donostia-San
Sebastián, Spain
- Centro
de Investigación Biomédica en Red de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN), 20014, Donostia-San Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, 48009 Bilbao, Spain
| | - Wiebke Albrecht
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, 2020 Antwerp, Belgium
- Center
for
Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Sara Bals
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, 2020 Antwerp, Belgium
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