Dynamics of deterministically positioned single-bond surface-enhanced Raman scattering from DNA origami assembled in plasmonic nanogaps

R. Chikkaraddy; V.A. Turek; Q. Lin; J. Griffiths; B. de Nijs; U.F. Keyser; J.J. Baumberg

doi:10.1002/jrs.5997

Dynamics of deterministically positioned single-bond surface-enhanced Raman scattering from DNA origami assembled in plasmonic nanogaps

R. Chikkaraddy, V.A. Turek, Q. Lin, J. Griffiths, B. de Nijs, U.F. Keyser, J.J. Baumberg^*

^*Corresponding author for this work

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

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Abstract

We study the dynamics of single bonds through the surface-enhanced Raman scattering (SERS) from single SERS-marker molecules containing a distinctive single alkyl bond. Assembly of the nanogaps and positioning of single molecules inside the electromagnetic hotspot are precisely controlled using DNA origami constructs. The observed SERS intensities and their spectral wandering, together with electromagnetic simulations, all confirm the role of picocavities in this nanogap geometry in allowing observation of SERS signatures from individual vibrating bonds. The strong electromagnetic field around each picocavity and the transient binding of the SERS-marker molecule reveal significant modifications to bond vibrations and selection rules over time.

Original language	English
Pages (from-to)	348-354
Journal	Journal of raman spectroscopy
Volume	52
Issue number	2
DOIs	https://doi.org/10.1002/jrs.5997
Publication status	Published - 2021
Externally published	Yes

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Chikkaraddy-2021-Dynamics-of-deterministically-positFinal published version, 16.1 MBLicence: CC BY

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title = "Dynamics of deterministically positioned single-bond surface-enhanced Raman scattering from DNA origami assembled in plasmonic nanogaps",

abstract = "We study the dynamics of single bonds through the surface-enhanced Raman scattering (SERS) from single SERS-marker molecules containing a distinctive single alkyl bond. Assembly of the nanogaps and positioning of single molecules inside the electromagnetic hotspot are precisely controlled using DNA origami constructs. The observed SERS intensities and their spectral wandering, together with electromagnetic simulations, all confirm the role of picocavities in this nanogap geometry in allowing observation of SERS signatures from individual vibrating bonds. The strong electromagnetic field around each picocavity and the transient binding of the SERS-marker molecule reveal significant modifications to bond vibrations and selection rules over time.",

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AU - Chikkaraddy, R.

AU - Turek, V.A.

AU - Lin, Q.

AU - Griffiths, J.

AU - de Nijs, B.

AU - Keyser, U.F.

AU - Baumberg, J.J.

PY - 2021

Y1 - 2021

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AB - We study the dynamics of single bonds through the surface-enhanced Raman scattering (SERS) from single SERS-marker molecules containing a distinctive single alkyl bond. Assembly of the nanogaps and positioning of single molecules inside the electromagnetic hotspot are precisely controlled using DNA origami constructs. The observed SERS intensities and their spectral wandering, together with electromagnetic simulations, all confirm the role of picocavities in this nanogap geometry in allowing observation of SERS signatures from individual vibrating bonds. The strong electromagnetic field around each picocavity and the transient binding of the SERS-marker molecule reveal significant modifications to bond vibrations and selection rules over time.

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JO - Journal of raman spectroscopy

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Dynamics of deterministically positioned single-bond surface-enhanced Raman scattering from DNA origami assembled in plasmonic nanogaps

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