Preparation and characterization of AgI nanoparticles with controlled size, 
morphology and crystal structure

Guo, Y.-G.; Lee, J.-S.; Maier, J.

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Preparation and characterization of AgI nanoparticles with controlled size, morphology and crystal structure

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Guo, Y.-G.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Lee, J.-S.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Maier, J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Guo, Y.-G., Lee, J.-S., & Maier, J. (2006). Preparation and characterization of AgI nanoparticles with controlled size, morphology and crystal structure. Solid State Ionics, 177(26-32), 2467-2471.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FB5F-E

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 beta-AgI
in wurtzite structure (2H); with poly(acrylic acid sodium salt) (PAS)
truncated-tetrahedron shaped gamma-Agl 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 gamma-Agl and 7H
and 9R phases could be stabilized in the form of nanocrystalline
powders. They transform reversibly into the high temperature alpha-AgI
phase and exhibit unusually high ionic conductivity and substantially
smaller transformation enthalpy values compared to the macroscopic
beta-AgI. (c) 2006 Elsevier B.V. All rights reserved.