DNA-Assisted assembly of plasmonic core-satellite nanostructures for surface-enhanced Raman spectroscopy (SERS)

Li An Wu, Wei En Li, Yih Fan Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

DNA-Assisted assembly has been demonstrated as a powerful method for synthesizing plasmonic nanostructures possessing electromagnetic hot spots for surface-enhanced Raman spectroscopy (SERS). In this work, we use DNA molecules as linkers to synthesize core-satellite nanostructures for SERS molecular detection. The interparticle distance, which is critical to Raman enhancement, is fine-Tuned by growing a silver shell on the surfaces of the gold nanoparticles. To achieve high and reproducible SERS effects, we accumulate the core-satellite nanostructures to form uniform SERS substrates with hot spots not only on a 2D plane but also along the z-Axis. We successfully use the SERS substrate to detect 1 nM adenine and 500 nM melamine.

Original languageEnglish
Title of host publication2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages206-209
Number of pages4
ISBN (Electronic)9781509030590
DOIs
StatePublished - 25 Aug 2017
Event12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 - Los Angeles, United States
Duration: 9 Apr 201712 Apr 2017

Publication series

Name2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017

Conference

Conference12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
Country/TerritoryUnited States
CityLos Angeles
Period9/04/1712/04/17

Keywords

  • adenine
  • core-satellite
  • DNA
  • melamine
  • plasmonic nanostructure
  • self-Assembly
  • SERS

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