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Presenter: Francesca Mangiarini, PhD, Photon etc.
Supervisor:

Date: Tue, January 29, 2013
Time: 13:30:00 - 14:30:00
Place: EOW 430

ABSTRACT

Abstract:

Developed for airborne applications, hyperspectral imaging is a new characterization method for material analysis. This technique allows the collection of spectrally resolved images, generating electroluminescence (EL), photoluminescence (PL) or Raman maps of the most diverse materials. This presentation will focus on the development of a hyperspectral imaging technique based on holographic filters. Compared to others, this technology shows an extraordinary high efficiency (up to 80%), combined with the acquisition of hundred thousands of spectra in minutes. In fact, instead of scanning line by line or point by point, the sample is imaged globally. The characterization of nanomaterials by microscopy hyperspectral imaging gives access to information such as micrometer scale resolution, and excitation and detection on the surface, without any loss from lateral diffusion and roughness. For photovoltaic materials (e.g. CIS, GaAs), this technique allows the study of spatial variations of cell properties, such as open circuit voltage and transport mechanisms. The EL maps of thin films, such as SiC, provide the ability to image distinct features and identify their spectral properties, giving a clear understanding of the distribution and position of the defects of the material. The rapidity and efficiency of this technique is also appreciated for Raman spectroscopy, where the acquisition of Raman maps can be very time consuming.

The most recent results on single carbon nanotubes, acquired in collaboration with the University of Montreal, will be discussed. The versatility of hyperspectral imaging makes it a great choice for the characterization of samples not only in advanced material science but also in the biological field.

Bio:

Francesca Mangiarini joined in 2011 Photon etc. Inc., a Montreal-based company, which developed and patented various solutions for hyperspectral imaging. Chemist by training, Francesca graduated in Industrial Chemistry at the University of Milan in 2006, with a specialization in industrial catalysis. Following her passion for nanoscience, she moved to Canada for her PhD in Chemistry at Concordia University, where she developed a method for the preparation of upconverting nanostructured materials by flame spray pyrolysis, and published several articles in the field. Always interested in the industrial applications of research results, Francesca is currently the application scientist at Photon etc. Inc. She is also president of the Italian Scientific Community in Canada, and strongly believes in the power of international exchanges between researchers.

For more information, please contact:

Dr. Tao Lu
taolu@ece.uvic.ca