Polarimetric Detection of Enantioselective Adsorption by Chiral Au Nanoparticles — Effects of Temperature, Wavelength and Size

R- and S-propylene oxide (PO) have been shown to interact enantiospecifically with the chiral surfaces of Au nanoparticles (NPs) modified with D- or L-cysteine (cys). This enantiospecific interaction has been detected using optical polarimetry measurements made on solutions of the D- or L-cys modifi...

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Published in:Nanomaterials and Nanotechnology 2015, Vol.5 (Godište 2015), p.1
Main Authors: Shukla, Nisha, Ondeck, Nathaniel, Khosla, Nathan, Klara, Steven, Petti, Alexander, Gellman, Andrew
Format: Article
Language:English
Subjects:
Adsorption
adsorp‐ tion
Chemical properties
chiral
Chirality
Enantiomers
enantioselective
Gold
Materials research
Nanomaterials
nanoparticle
Nanoparticles
Optical properties
Optical rotation
Oxides
separation
Surface chemistry
Wavelengths
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cited_by cdi_FETCH-LOGICAL-c548t-d60cdcca885dc6817bc6c4ee57fbad321a415500fc1d53b813bd41fdaaaa70333
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container_issue Godište 2015
container_start_page 1
container_title Nanomaterials and Nanotechnology
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creator Shukla, Nisha
Ondeck, Nathaniel
Khosla, Nathan
Klara, Steven
Petti, Alexander
Gellman, Andrew
description R- and S-propylene oxide (PO) have been shown to interact enantiospecifically with the chiral surfaces of Au nanoparticles (NPs) modified with D- or L-cysteine (cys). This enantiospecific interaction has been detected using optical polarimetry measurements made on solutions of the D- or L-cys modified Au (cys/Au) NPs during addition of racemic PO. The selective adsorption of one enantiomer of the PO onto the cys/Au NP surfaces results in a net rotation of light during addition of the racemic PO to the solution. In order to optimize the conditions used for making these measurements and to quantify enantiospecific adsorption onto chiral NPs, this work has measured the effect of temperature, wavelength and Au NP size on optical rotation by solutions containing D- or L-cys/Au NPs and racemic PO. Increasing temperature, decreasing wavelength and decreasing NP size result in larger optical rotations.
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subjects Adsorption
adsorp‐ tion
Chemical properties
chiral
Chirality
Enantiomers
enantioselective
Gold
Materials research
Nanomaterials
nanoparticle
Nanoparticles
Optical properties
Optical rotation
Oxides
separation
Surface chemistry
Wavelengths
title Polarimetric Detection of Enantioselective Adsorption by Chiral Au Nanoparticles — Effects of Temperature, Wavelength and Size
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