Enhancement of Circular Dichroism of a Chiral Material by Dielectric Nanospheres

Daniel Vestler; Assaf Ben-Moshe; Gil Markovich

doi:https://doi.org/10.1021/acs.jpcc.8b10975

Enhancement of Circular Dichroism of a Chiral Material by Dielectric Nanospheres

Daniel Vestler, Assaf Ben-Moshe, Gil Markovich

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

Circular dichroism (CD) spectroscopy is very useful for studies of biomolecular conformation but suffers from very weak signals. Several theoretical and experimental papers reported schemes for CD enhancement using enhanced local fields produced by plasmonic nanostructures. Here we report enhancement of visible wavelength CD of chiral mercury sulfide (HgS) nanocrystals by Mie resonances of amorphous selenium nanospheres. The spatially averaged CD enhancement factor was estimated to be 4.7 ± 1.5 fold, while the peak enhancement at particular locations on the nanospheres is probably >10. This type of enhancement may be useful for increasing the sensitivity of CD measurements and in particular toward achievement of single chiral nanostructure CD measurements.

Original language	English
Pages (from-to)	5017-5022
Number of pages	6
Journal	Journal of Physical chemistry c
Volume	123
Issue number	8
DOIs	https://doi.org/10.1021/acs.jpcc.8b10975
State	Published - 28 Feb 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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https://doi.org/10.1021/acs.jpcc.8b10975

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title = "Enhancement of Circular Dichroism of a Chiral Material by Dielectric Nanospheres",

abstract = "Circular dichroism (CD) spectroscopy is very useful for studies of biomolecular conformation but suffers from very weak signals. Several theoretical and experimental papers reported schemes for CD enhancement using enhanced local fields produced by plasmonic nanostructures. Here we report enhancement of visible wavelength CD of chiral mercury sulfide (HgS) nanocrystals by Mie resonances of amorphous selenium nanospheres. The spatially averaged CD enhancement factor was estimated to be 4.7 ± 1.5 fold, while the peak enhancement at particular locations on the nanospheres is probably >10. This type of enhancement may be useful for increasing the sensitivity of CD measurements and in particular toward achievement of single chiral nanostructure CD measurements.",

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AU - Vestler, Daniel

AU - Ben-Moshe, Assaf

AU - Markovich, Gil

PY - 2019/2/28

Y1 - 2019/2/28

N2 - Circular dichroism (CD) spectroscopy is very useful for studies of biomolecular conformation but suffers from very weak signals. Several theoretical and experimental papers reported schemes for CD enhancement using enhanced local fields produced by plasmonic nanostructures. Here we report enhancement of visible wavelength CD of chiral mercury sulfide (HgS) nanocrystals by Mie resonances of amorphous selenium nanospheres. The spatially averaged CD enhancement factor was estimated to be 4.7 ± 1.5 fold, while the peak enhancement at particular locations on the nanospheres is probably >10. This type of enhancement may be useful for increasing the sensitivity of CD measurements and in particular toward achievement of single chiral nanostructure CD measurements.

AB - Circular dichroism (CD) spectroscopy is very useful for studies of biomolecular conformation but suffers from very weak signals. Several theoretical and experimental papers reported schemes for CD enhancement using enhanced local fields produced by plasmonic nanostructures. Here we report enhancement of visible wavelength CD of chiral mercury sulfide (HgS) nanocrystals by Mie resonances of amorphous selenium nanospheres. The spatially averaged CD enhancement factor was estimated to be 4.7 ± 1.5 fold, while the peak enhancement at particular locations on the nanospheres is probably >10. This type of enhancement may be useful for increasing the sensitivity of CD measurements and in particular toward achievement of single chiral nanostructure CD measurements.

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M3 - مقالة

SN - 1932-7447

VL - 123

SP - 5017

EP - 5022

JO - Journal of Physical chemistry c

JF - Journal of Physical chemistry c

IS - 8

ER -

Enhancement of Circular Dichroism of a Chiral Material by Dielectric Nanospheres

Abstract

All Science Journal Classification (ASJC) codes

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