Characterization of SiO2/Ag composite particles synthesized by in situ reduction and its application in electrically conductive adhesives |
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| Affiliation: | 1. Structural Integrity Group, Escuela Politécnica Superior, Avenida Cantabria s/n, 09006 Burgos, Spain;2. Civil Engineering Department, University of Burgos, Calle Villadiego s/n, 09001 Burgos, Spain;1. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;1. School of Materials, The University of Manchester, Manchester M13 9PL, UK;2. TWI Ltd, Granta Park, Great Abington, Cambridge CB21 6AL, UK;1. National Core Research Center, Pusan National University, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 609-735, Republic of Korea;2. Department of Metallurgical Engineering, Pukyong National University, Sinseon-ro 365 beon-gil, Nam-gu, Busan 608-739, Republic of Korea |
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| Abstract: | In the study, SiO2/Ag composite particles with silver coating onto the surface of silica have been successfully prepared via a novel and facile approach (Oxidation–Reduction Method). In this approach, the SiO2 particles were first modified with 3-ammoniatriethoxysilane (APTES) and glyoxalic acid (GA) through two-step reaction, the aldehyde group ( CHO) were anchored onto the surfaces of silica spheres via electrostatic attraction, these Ag(TEA)2]+ ions in the solution were then reduced by the CHO and coated onto the surface of silica to obtain SiO2/Ag composite particles. The effects of the reaction conditions on silver content and synthetic mechanism had also been discussed. The structure, morphology and optical properties of the SiO2/Ag composite particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–vis spectroscopy. The results showed the surface of SiO2 was surrounded by pure silver nanoparticles, and the silver nanoparticles had face-centered-cubic structure, the SiO2/Ag composite particles with core–shell morphology and special optical properties. And the small content SiO2/Ag composite particles applied in electrically conductive adhesives (ECAs) improved the electrical bulk resistivity and tensile shear strength. |
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| Keywords: | Silver nanoparticles Silver content Situ reduction |
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