Analysis of photothermal release of Oligonucleotides from hollow Gold nanospheres by surface enhanced raman scattering (SERS)

David G. Mackanic, Samuel Mabbott, Karen Faulds, Duncan Graham

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6 Citations (Scopus)

Abstract

The photothermal release of single stranded DNA (ssDNA) from the surface of gold nanoparticles of different shapes and sizes is a promising mode of delivering DNA for gene-therapy applications. Here, we demonstrate the first targeted photothermal release of ssDNA from hollow gold nanospheres (HGNs) and analyse the release of the ssDNA using quantitative surface enhanced Raman scattering (SERS). The HGNs used demonstrate a tunable localized surface plasmon resonance (LSPR) frequency while maintaining size consistency, allowing for selective ssDNA release based on matching the excitation frequency to the plasmon resonance. It is shown that HGNs with resonances at 760 and HGN 670 nm release significant amounts of ssDNA when excited via 785 nm and 640 nm lasers respectively. When excited with a wavelength far from the LSPR of the particles, the ssDNA release is negligible. This is the first demonstration of SERS to analyze the amount of ssDNA photothermally released from the surface of HGNs. In contrast to traditional fluorescence measurements, this SERS based approach provides quantitatively robust data for analysis of ssDNA release and lays a strong foundation for future studies exploiting plasmonically induced ssDNA release.
LanguageEnglish
Pages1-24
Number of pages24
JournalJournal of Physical Chemistry C
Early online date4 Apr 2016
DOIs
Publication statusE-pub ahead of print - 4 Apr 2016

Fingerprint

oligonucleotides
Nanospheres
Oligonucleotides
Single-Stranded DNA
Gold
Raman scattering
hollow
DNA
deoxyribonucleic acid
Raman spectra
gold
Surface plasmon resonance
surface plasmon resonance
Gene therapy
gene therapy
Surface measurement
Demonstrations
Fluorescence
Nanoparticles
Wavelength

Keywords

  • Oligonucleotides
  • gold nanoparticles
  • surface enhanced raman scattering (SERS)

Cite this

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title = "Analysis of photothermal release of Oligonucleotides from hollow Gold nanospheres by surface enhanced raman scattering (SERS)",
abstract = "The photothermal release of single stranded DNA (ssDNA) from the surface of gold nanoparticles of different shapes and sizes is a promising mode of delivering DNA for gene-therapy applications. Here, we demonstrate the first targeted photothermal release of ssDNA from hollow gold nanospheres (HGNs) and analyse the release of the ssDNA using quantitative surface enhanced Raman scattering (SERS). The HGNs used demonstrate a tunable localized surface plasmon resonance (LSPR) frequency while maintaining size consistency, allowing for selective ssDNA release based on matching the excitation frequency to the plasmon resonance. It is shown that HGNs with resonances at 760 and HGN 670 nm release significant amounts of ssDNA when excited via 785 nm and 640 nm lasers respectively. When excited with a wavelength far from the LSPR of the particles, the ssDNA release is negligible. This is the first demonstration of SERS to analyze the amount of ssDNA photothermally released from the surface of HGNs. In contrast to traditional fluorescence measurements, this SERS based approach provides quantitatively robust data for analysis of ssDNA release and lays a strong foundation for future studies exploiting plasmonically induced ssDNA release.",
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AU - Faulds, Karen

AU - Graham, Duncan

N1 - This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see DOI: 10.1021/acs.jpcc.6b01861

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N2 - The photothermal release of single stranded DNA (ssDNA) from the surface of gold nanoparticles of different shapes and sizes is a promising mode of delivering DNA for gene-therapy applications. Here, we demonstrate the first targeted photothermal release of ssDNA from hollow gold nanospheres (HGNs) and analyse the release of the ssDNA using quantitative surface enhanced Raman scattering (SERS). The HGNs used demonstrate a tunable localized surface plasmon resonance (LSPR) frequency while maintaining size consistency, allowing for selective ssDNA release based on matching the excitation frequency to the plasmon resonance. It is shown that HGNs with resonances at 760 and HGN 670 nm release significant amounts of ssDNA when excited via 785 nm and 640 nm lasers respectively. When excited with a wavelength far from the LSPR of the particles, the ssDNA release is negligible. This is the first demonstration of SERS to analyze the amount of ssDNA photothermally released from the surface of HGNs. In contrast to traditional fluorescence measurements, this SERS based approach provides quantitatively robust data for analysis of ssDNA release and lays a strong foundation for future studies exploiting plasmonically induced ssDNA release.

AB - The photothermal release of single stranded DNA (ssDNA) from the surface of gold nanoparticles of different shapes and sizes is a promising mode of delivering DNA for gene-therapy applications. Here, we demonstrate the first targeted photothermal release of ssDNA from hollow gold nanospheres (HGNs) and analyse the release of the ssDNA using quantitative surface enhanced Raman scattering (SERS). The HGNs used demonstrate a tunable localized surface plasmon resonance (LSPR) frequency while maintaining size consistency, allowing for selective ssDNA release based on matching the excitation frequency to the plasmon resonance. It is shown that HGNs with resonances at 760 and HGN 670 nm release significant amounts of ssDNA when excited via 785 nm and 640 nm lasers respectively. When excited with a wavelength far from the LSPR of the particles, the ssDNA release is negligible. This is the first demonstration of SERS to analyze the amount of ssDNA photothermally released from the surface of HGNs. In contrast to traditional fluorescence measurements, this SERS based approach provides quantitatively robust data for analysis of ssDNA release and lays a strong foundation for future studies exploiting plasmonically induced ssDNA release.

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