Synthesis and Properties of the Self-Assembly of Gold-Copper Nanoparticles into Nanoribbons
Por:
Bazán-Díaz L., Mendoza-Cruz R., Velázquez-Salazar J.J., Plascencia-Villa G., Ascencio-Aguirre F.M., Herrera-Becerra R., Ojeda-Galván H.J., Guisbiers G., Yacamán M.J.
Publicada:
14 ago 2018
Ahead of Print:
1 ene 2017
Resumen:
We report the efficient wet-chemical production of self-assembled gold-copper bimetallic nanoparticles (diameter of ~2 nm) into two-dimensional flexible ribbonlike nanostructures. The direct observation of a layered arrangement of particles into nanoribbons was provided through high-resolution transmission electron microscopy and electron tomography. These nanoribbons showed photoluminesce and efficient photocatalytic activity for the conversion of 4-nitrophenol. The thermal stability of the nanoribbons was also measured by in situ heat treatment in the electron microscope, confirming that the self-assembled gold-copper nanoribbons efficiently supported up to 350 °C. The final morphology of the nanoparticles and their ability to self-assemble into flexible nanoribbons were dependent on concentration and the ratio of precursors. Therefore, these experimental factors were discussed. Remarkably, the presence of copper was found to be critical to triggering the self-assembly of nanoparticles into ordered layered structures. These results for the synthesis and stability of self-assemblies of metallic nanoparticles present a potential extension of the method to producing materials with catalytic applications. © 2018 American Chemical Society.
Filiaciones:
Bazán-Díaz L.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
Mendoza-Cruz R.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
Velázquez-Salazar J.J.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
Plascencia-Villa G.:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
Ascencio-Aguirre F.M.:
Institute of Physics, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Col. Ciudad Universitaria, Coyoacán D. F., C.P. 04510, Mexico
Guisbiers G.:
Department of Physics and Astronomy, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204, United States
Coordinacion Para la Innovacion y la Aplicacion de la Ciencia y la Tecnologia, Universidad Autónoma de San Luis Potosí (UASLP), Álvaro Obregón 64, San Luis Potosí, 78000, Mexico
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