Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2016)
    Nanomaterials Wednesday Sessions
       Session NM-WeP

Paper NM-WeP9
Optical and Morphological Characterization of ZnSe Nanoparticles Processed by Laser Ablation in Liquid

Wednesday, December 14, 2016, 4:00 pm, Room Mauka

Session: Nanomaterials Poster Session
Presenter: Patricia Maldonado-Altamirano, ESFM-IPN, México
Authors: P. Maldonado-Altamirano, ESFM-IPN, México
R.Y. Ponce-Cano, ESFM-IPN, México
L.A. Martinez-Ara, ESFM-IPN, México
M.A. Hernandez-Perez, ESIQIE-IPN, México
J.R. Aguilar-Hernandez, ESFM-IPN, México
Correspondent: Click to Email
In this work we present results and analysis concerning the processing of semiconducting ZnSe nanoparticles obtained by laser ablation of diluted ZnSe powder in acetone. A Nd-YAG pulsed laser was used for ablation, tuned at the first harmonic, 1064 nm, 50 Hz frequency repetition during 60 minutes. The experiment was performed as a function of the laser power intensity. UV-Vis and Raman spectroscopies were used to characterize the ZnSe particles, whereas scanning electron microscopy, transmission electron microscopy and X ray diffraction were used to determine the morphology and size of the particles. According to the UV-Vis results it was confirmed a shift of the band gap towards high energy (blue shift) from 2.7 to 3.3 eV. Raman spectroscopy show the LO phonon at 250 cm-1 and also the so called surface mode at 230 cm-1, for the case of the smaller particles, approximately 10 nm, which was estimated through SEM and TEM images. The cristalline planes were also observed in the TEM images. X-Ray diffractograms confirmed that the particles show the wurtzite structure. A deep analysis of the results is presented and discussed.