78311 20200117221654.0 doi 10.1016/j.jcis.2017.11.055 sideral 103468 ART-2018-103468 eng (orcid)0000-0002-8787-117X Clemente, A. Versatile hollow fluorescent metal-silica nanohybrids through a modified microemulsion synthesis route 2018 Access copy available to the general public Unrestricted Silica-metal nanohybrids are common materials for applications in biomedicine, catalysis or sensing. Also, hollow structures are of interest as they provide additional useful features. However, in these materials the control of the size and accessibility to the inner regions of the structure usually requires complex synthesis procedures. Here we report a simple colloidal procedure for synthesizing hollow silica-metal nanohybrids, driven by the diffusion of metal precursors through the porous silica shell and subsequent reduction in aqueous solutions. The formation of hollow nanoparticles is controlled by the colloidal conditions during synthesis, which affect the ripening of hollow nanoparticles in presence of organosilanes. The modification of the conditions during synthesis affected the growth of silica precursors in presence of fluorescein isothiocyanate (FITC). The limited access to water molecules during the hydrolysis of silica precursors is attributed to the hydrophobicity of organic fluorescent molecules linked to the condensing silica clusters at the initial stages of nanoparticle formation and to the limitation of water content in the microemulsion method used. Finally, the growth of metal nanoseeds at the core of hollow nanoparticles can be easily achieved though a simple method in aqueous environment. The pH and thermal conditions during the reduction process affect the formation of metal-silica nanohybrids and their structural features. info:eu-repo/grantAgreement/ES/MINECO/RYC-2011-07641 info:eu-repo/grantAgreement/ES/MINECO/JCI-2012-13421 info:eu-repo/grantAgreement/EC/FP7/263147/EU/Development of reference methods for hazard identification, risk assessment and LCA of engineered nanomaterials/NANOVALID info:eu-repo/grantAgreement/ES/DGA/FSE info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 6.361 2018 CHEMISTRY, PHYSICAL 29 / 148 = 0.196 2018 Q1 T1 1.29 2018 Biomaterials 2018 Q1 Surfaces, Coatings and Films 2018 Q1 Electronic, Optical and Magnetic Materials 2018 Q1 Colloid and Surface Chemistry 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Moreno, N. (orcid)0000-0002-2436-1041 Lobera, M.P. Universidad de Zaragoza (orcid)0000-0001-5512-0075 Balas, F. Universidad de Zaragoza (orcid)0000-0002-8701-9745 Santamaria, J. Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 513 (2018), 497-504 J. colloid interface sci. JOURNAL OF COLLOID AND INTERFACE SCIENCE 0021-9797 564150 http://zaguan.unizar.es/record/78311/files/texto_completo.pdf Postprint 55922 http://zaguan.unizar.es/record/78311/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:78311 articulos driver 2020-01-17-22:10:31 ARTICLE