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Morphological Characterization with STM and SEM of CdSe Nanostructures in Function of pH
Gabriela Sánchez Legorreta1, Porfirio Domingo Rosendo Francisco1, Rebeca Vargas Sanabria1 and Oscar Olea Mejía2
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DOI:10.17265/2161-6213/2019.7-8.004
1. Facultad de Ciencias, UAEM, Campus “El Cerrillo, Pierdas Blancas”, Carretera Toluca-Ixtlahuaca, Km. 15.5, CP. 50200 Toluca de Lerdo, México
2. Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km. 14.5, Unidad San Cayetano, C.P. 50200, Toluca de Lerdo, México
In this paper, we have interest in the CdSe (cadmium selenide) semiconductor due to their physical and optical properties that depend on their morphology and size, as well as their possible applications in electronic and optoelectronic fields, for example, in the fabrication of solar cells or nanotransistors. For this reason, we synthetized nanoparticles of CdSe using the colloidal method, and varied the pH value: 8 to 12, to know the effect of pH on the samples. The nanoparticles were characterized using the SEM (scanning electron microscope) and STM (scanning tunneling microscope) to know the morphology and electronic cloud on the surface of the samples. In each case, we found different sizes (from 6 to 11.5 nm) and shapes as filaments (fibbers), bars and spheres of CdSe nanoparticles and the 3D-FFT was obtained too.
CdSe, pH value, colloidal synthesis, SEM, STM.