caa a22 4500 44586611X CHVBK 20180317145458.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1140/epjd/e2011-10605-7 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-10605-7 Gold aggregates on silica templates and decorated silica arrays for SERS applications [Elektronische Daten] [F. Castillo, E. De la Rosa, E. Pérez] In this work, we report the fabrication and characterization of size controllable gold nanoparticles (NPs) aggregates for their application in surface enhanced Raman scattering (SERS). Aggregates were prepared using two methodologies: (i)by using silica particles arrays as a template to agglomerate gold NPs between the inter-particle interstices, and (ii) by functionalizing silica particles to be used as support to graft gold nanoparticles and thus to form decorated silica particle arrays. These substrates were used in the detection of Rhodamine 6G producing an enhancement factor (EF) from 104 to 106 that is associated to the increment of hot spot (HS) sites, and the fact that plasmon resonance from aggregates and absorption wavelength of test molecules are closely in resonance with excitation wavelength. The EF was also reduced when the plasmon resonance was red-shifted as a result of the increment of aggregate size. In spite of this, the EF is high enough to make these SERS substrates excellent candidates for sensing applications. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Castillo F. Doctorado en Ingeniería y Ciencia de Materiales (DICIM), Universidad Autónoma de San Luis Potosí, Av. Manuel Nava #6, Zona Universitaria, 78290, San Luis Potosí, México aut De la Rosa E. Centro de Investigaciones en Óptica, A.C. A.P. 1-948, 37150, León Gto., Mexico aut Pérez E. Instituto de Física, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava #6, Zona Universitaria, 78290, San Luis Potosí, Mexico aut The European Physical Journal D Springer-Verlag 63/2(2011-07-01), 301-306 1434-6060 63:2<301 2011 63 10053 https://doi.org/10.1140/epjd/e2011-10605-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-10605-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Castillo F. Doctorado en Ingeniería y Ciencia de Materiales (DICIM), Universidad Autónoma de San Luis Potosí, Av. Manuel Nava #6, Zona Universitaria, 78290, San Luis Potosí, México aut NATIONALLICENCE 700 1- De la Rosa E. Centro de Investigaciones en Óptica, A.C. A.P. 1-948, 37150, León Gto., Mexico aut NATIONALLICENCE 700 1- Pérez E. Instituto de Física, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava #6, Zona Universitaria, 78290, San Luis Potosí, Mexico aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 63/2(2011-07-01), 301-306 1434-6060 63:2<301 2011 63 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer