Idaho State University

Lisa Lau

Rene Rodriguez

Joshua J Pak

Joseph S Gardner

John Kalivas

Ikwulono David Unobe

Endrit Shurdha

Methods for identifying marks in a defaced metal surface by use of computer-implemented processing of images obtained according to a thermal lock-in imaging technique are described. Methods include processing phase images and/or amplitude images according to principal component analysis of a concatenated input matrix and development of a score image for each principal component determined by the analysis. Score images or extracted features of score images (e.g., Zernike moments) are compared to images/features in a reference data library and based upon the comparison, the defaced mark can be identified.

Restoration of defaced markings using lock-in infrared thermography

CuInSnanoparticles have been prepared from single source precursors via microwave irradiation. Also, CuInGaSalloy nanoparticles have been prepared. Microwave irradiation methods have allowed an increase in the efficiency of preparation of these materials by providing increased uniformity of heating and shorter reaction times. Nanoparticle growth has been controlled in the about 1 to 5 nm size range by variation of thiolated capping ligand concentrations as well as reaction temperatures and times. Investigation of the photophysical properties of the colloidal nanoparticles has been performed using electronic absorption and luminescence emission spectroscopy. Qualitative nanoparticles sizes have been determined from the photoluminescence (PL) data and compared to TEM images.

Rapid synthesis and size control of chalcopyrite-based semi-conductor nanoparticles using microwave irradiation

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Idaho Falls, ID, United States of America

Lisa Lau