Preparation and characterization of AgI nanoparticles with controlled size,morphology and crystal structure |
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| Institution: | 1. Faculty of Electrical and Computer Engineering, Tabriz University, 51666, Tabriz, Iran;2. Chemical Engineering Department, Bioengineering Division and Biyomedtek/Nanobiyomedtek, Hacettepe University, 06800, Ankara, Turkey;3. Chemictry Department, Hacettep University, 06800, Ankara, Turkey;1. Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Science, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;2. University of the Chinese Academy of Sciences, Beijing 100049, China;3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;1. Key Laboratory of Energy Materials and Devices (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning Province, China;2. Department of Materials Science and Engineering, University of Washington, Seattle 98195, WA, USA;1. Department of Mechanical Engineering, Holy Mary Institute of Technology and Science, Hyderabad - 501301, Telangana, India;2. Department of Mechanical Engineering, Saveetha Engineering College, Saveetha Nagar, Chennai - 602105, Tamil Nadu, India;3. Department of Mechanical Engineering, Annamalai University, Annamalai Nagar, Chidambaram - 608002, Tamil Nadu, India;4. Department of Mechatronics Engineering, Sri Krishna College of Engineering and Technology, Coimbatore - 641008, Tamil Nadu, India;5. Department of Mechanical Engineering, PSNA College of Engineering and Technology, Dindigul - 624622, Tamil Nadu, India;6. Department of Chemistry, DKV Arts and Science College, Jamnagar - 361008, Gujarat, India;7. Department of Mechanical Engineering, Gokaraju Rangaraju Institute of Engineering and Technology, Hyderabad - 500090, Telangana, India |
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| Abstract: | AgI nanoparticles were prepared by solution-based routes using water-soluble anionic or cationic polyelectrolytes as capping agents. Depending on the polyelectrolytes, AgI nanoparticles with well-defined morphology, size, and phase compositions were obtained: the use of poly(sodium 4-styrenesulfonate) (PSS) resulted in AgI nano-rods of β-AgI in wurtzite structure (2H); with poly(acrylic acid sodium salt) (PAS) truncated-tetrahedron shaped γ-AgI nanoparticles (nanotetrahedra) in zinc-blende structure (3C) were obtained; by employing poly(diallyldimethylammonium chloride) (PDADMAC) plate-like AgI nanoparticles (nano-plates) consisting of unusual polytype phases of AgI (7H and 9R) were formed. Macroscopically unstable γ-AgI and 7H and 9R phases could be stabilized in the form of nanocrystalline powders. They transform reversibly into the high temperature α-AgI phase and exhibit unusually high ionic conductivity and substantially smaller transformation enthalpy values compared to the macroscopic β-AgI. |
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