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Optical Nanomaterial Spectroscopy

We plan to study single inorganic nanostructures and hybrid structures by means of linear and non-linear spectroscopy, to understand their energy decay paths and control their quantum efficiency by geometry variation, material hybridization and functionalization. This will help develop highly efficient linear and nonlinear radiative markers for future nanophotonic applications.


Project Overview:

Group:
Aim:
The aim of this project is to investigate radiative and non-radiative energy decay paths and their quantum efficiency of single nanostructures and their hybrids.
Members:
Collaborators:
Prof. Michel Orrit
MoNOS, University of Leiden, Netherlands
Prof. Byungkwon Lim
Sungkyunkwan University, Korea
Prof. Peter Zijlstra
Technical University of Eindhoven, Netherlands

Research Overview:

Metallic and semiconductor nanoparticles are the functional building blocks of future nanophotonic devices, and new optical properties of these particles are continually discovered and rediscovered. Observation of luminescence from gold nanorods is a good example, the phenomenon is fascinating given that metals do not possess an energy bandgap to concentrate electron-hole pairs in defined states. It is being heavily utilized as non-linear luminescent markers in non-cytotoxic imaging of targeted cancer cells and in high-density optical storage.

In this project, we study optical nanostructures by means of linear and non-linear luminescence/scattering spectroscopy, to understand the radiative energy decay paths and to control its quantum efficiency using size, shape, hybridization and surface functionalization. In particular, the radiative decay enhancement will be manipulated by geometry variations in nanoparticles and structures. One of this project aim will be to develop non-toxic, highly efficient linear and nonlinear markers that are stable and free of blinking/bleaching.

Rererences

  1.  A. M. Siddiquee, A. B. Taylor, S. Syed, G. H. Lim, B. Lim and J. W. M. Chon, “Measurement of Plasmon-Mediated Two-Photon Luminescence Action Cross Sections of Single Gold Bipyramids, Dumbbells, and Hemispherically Capped Cylindrical Nanorods,” J. Phys. Chem. C, 119, 28536-28543, (2015)
  2. A. B. Taylor, A. M. Siddiquee and J. W. M. Chon, “Below melting point photothermal reshaping of single gold nanorods driven by surface diffusion,” ACS Nano, 8 (12), 12071-12079 (2014)
  3. P. Zijlstra, J. W. M. Chon, M. Gu, “White light scattering spectroscopy and electron microscopy of laser induced melting in single gold nanorods,” Phys. Chem. Chem. Phys., 11, 5915 - 5921 (2009)
  4. X. Li, J. van Embden, J. W. M. Chon, M. Gu, “Enhanced two-photon absorption of CdS nanocrystal rods,” Appl. Phys. Lett. 94, 103117 (2009)

Project Leader:
Associate Professor
James W. M. Chon

ph: +61 3 9214 4326
jchon@swin.edu.au

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