Structure and Spectroscopy of Buried Interfaces in Organic Thin Films and Colloids

Abstract

A major accomplishment of this project has been that we have resolved nearly all the fundamental problems and demonstrated Second Harmonic Generation as an effective and versatile method for characterizing the solid-liquid interfaces of micron to nanometer size particles buried deep in colloids. We have shown for the first time that SHG from the surface of silver nanoparticles can be detected, and through monitoring the second harmonic light scattering we can determine the mechanism and rates of reactions occurring at the nanoparticle surface. During this process we have found a method to increase the fluorescence quantum efficiency of metallic nanoparticles by orders of magnitude. The results from this project will facilitate the usage of nanoparticles in sensor technology in general and in biomedical imaging.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2012
Accession Number
ADA563659

Entities

People

  • Hai-Lung Dai

Organizations

  • Temple University

Tags

Communities of Interest

  • Biomedical
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Charge Transfer
  • Demographic Cohorts
  • Films
  • Fluorescence
  • Light Scattering
  • Luminescence
  • Materials
  • Metallic Nanoparticles
  • Nanoparticles
  • Optical Properties
  • Particles
  • Quantum Efficiency
  • Scattering
  • Second Harmonic Generation
  • Self Assembly
  • Spectroscopy
  • Thin Films

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Biotechnology
  • Quantum Computing