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Doctoral thesis
Open access
English

Large-scale self-assembled plasmonic templates for enhanced spectroscopy

ContributorsChekini, Mahshid
Defense date2016-03-02
Abstract

Bottom-up approaches are widely used in preparation of high density nanoparticle assemblies since they can offer cost-effectivity and versatility for production of large-scale templates. Taking advantage of intense near field at plasmonic metal nanoparticles or in gaps between them resulting from localized surface plasmon resonances enables us to enhance spectroscopic signals particularly Raman and fluorescence. Several effects depend on the nanoscale distances. First, the plasmon band tuning and electric field strength directly depend on the nanoparticles gap size. Second, the spectral overlap of plasmon resonance and reporter molecule is also important. Moreover in fluorescence spectroscopy, fluorescence quenching is directly affected by metal-fluorophore distances. Therefore, overall distance control at nanoscale was considered as a main objective of this research. We used bottom-up techniques such as seed-mediated growth and layer by layer deposition. The prepared tunable and large-scale plasmonic templates gave promising results in enhanced spectroscopy.

eng
Keywords
  • Plasmonics
  • Bottom-up fabrication
  • Layer-by-layer
  • Gold nanoparticles
  • Polyelectrolytes
  • Self-assembly
  • Plasmonic templates
  • SERS
  • Fluorescence enhancement
  • Twisted silica structures
  • Porous silica
Research group
Citation (ISO format)
CHEKINI, Mahshid. Large-scale self-assembled plasmonic templates for enhanced spectroscopy. 2016. doi: 10.13097/archive-ouverte/unige:82404
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Creation30/03/2016 14:59:00
First validation30/03/2016 14:59:00
Update time15/03/2023 00:15:26
Status update15/03/2023 00:15:26
Last indexation29/01/2024 20:43:49
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