Development and characterization of nanocomposites with gold nanoparticles embedded in the nanostructured silicon substr
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characterization of nanocomposites with gold nanoparticles embedded in the nanostructured silicon substrate. V. L. Gayou, A. Orduña Diaz, R. Delgado Macuil, M. Rojas López, J.A. Andraca Adame and Vivechana Agarwal MRS Proceedings / Volume 1371 / 2012 DOI: 10.1557/opl.2012.172
Link to this article: http://journals.cambridge.org/abstract_S1946427412001728 How to cite this article: V. L. Gayou, A. Orduña Diaz, R. Delgado Macuil, M. Rojas López, J.A. Andraca Adame and Vivechana Agarwal (2012). Development and characterization of nanocomposites with gold nanoparticles embedded in the nanostructured silicon substrate.. MRS Proceedings,1371, imrc111371s1p025 doi:10.1557/ opl.2012.172 Request Permissions : Click here
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Mater. Res. Soc. Symp. Proc. Vol. 1371 © 2012 Materials Research Society DOI: 10.1557/opl.2012.172
Development and characterization of nanocomposites with gold nanoparticles embedded in the nanostructured silicon substrate. V. L. Gayou1, A. Orduña Diaz1, R. Delgado Macuil1, M. Rojas López1, J.A. Andraca-Adame2, Vivechana Agarwal3 1 CIBA-IPN Tlaxcala. Tepetitla de Lardizabal, Tlaxcala, México. C.P. 90700 2 CNMN-IPN, Unidad profesional “Adolfo López Mateos” calle Luis Enrique Erro S/N, Zacatenco, C. P. 07738 México D.F. 3 CIICAp-UAEM Av. Universidad 1001, Col. Chamilpa. Cuernavaca, Morelos, Mexico. [email protected] ABSTRACT In the present work an alternative nanoparticle synthesis technique was developed, where the nanoparticles nucleate and grow inside the pores of the nanostructured porous silicon (NPS). Employing green method for the nanoparticle synthesis, yeast extract is used as a reducing agent. The porous layers were prepared by electrochemical etching of Boron-doped (100) Si substrate (0.01-0.02Ohm⋅cm). The NPS support was immersed into the reactive colloid for different times, then withdrawn, cleaned and dried. SEM and XRD measurements were carried out to characterize the NPS substrate and the immobilized catalyst nanoparticles. EDX mapping shows a homogeneous deposition of nanoparticles on the porous support. The average particle size, calculated from XRD diffractograms (using the Scherrer`s formula), was found between 6 to 10 nm. This method provides a good incorporation and distribution of nanoparticles, also an alternative environment-friendly technique to develop catalytic devices fabricated on silicon substrate with an additional advantage of being integrated with the silicon based microelectronic circuits. Keywords: Nanostructure, biological synthesis (assembly), Au. INTRODUCTION Highly dispersed gold nanoparticles have been demonstrated to be very active for a number of reactions such as CO oxidation and hydrogenation [1-4]. A prerequisite for their applications in many catalytic reactions is the homogeneous distribution of small gold nanoparticles with diameters between 2 and 5 nm. Several methods (e.g. impregnation, coprecipitation, deposition-precipitation, sol-gel, anion adsorption an
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