Formation of gold and silver nanostructures within polyvinylpyrollidone (PVP) gel

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

OSTI ID:21372563

Changshun, Wang ^[1]; Jiejun, Zhu ^[2]; Hongchen, Li ^[1]

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1. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211100 (China)
2. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 (China)

Study on reduction of Au(III) and Ag(I) and the formation of Au and Ag nanostructures was performed on the gels of metal precursor and PVP polymer mixture. Some comparing samples were prepared for better understanding the role of reactants on the reduction of metal ions and further growth of nanocrystals. The results suggest that, in addition to its function of generating stable colloids, PVP not only has a reducing effect on metal ions, but also acts as a crystal growth modifier. At low temperatures, the reducing effect of PVP is strong on Ag(I) ions in AgNO{sub 3}, while the reduction of complex Au(III) ions in HAuCl{sub 4} is slow, involving two steps of Au(III)->Au(I)->Au. In the study of temperature disturbance on crystal growth, Au nanoplates of new and well-defined star shape were observed. The differences in the size and shape of nanoparticles are discussed from the colloid chemistry. - Graphical abstract: If a temperature difference was introduced to the gel of Au{sup 3+}(H{sub 2}O)-PVP, large sized Au nanoplates with new and well-defined star shape were observed.

• OSTI ID: 21372563
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 4; Other Information: DOI: 10.1016/j.jssc.2010.01.021; PII: S0022-4596(10)00035-6; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CRYSTAL GROWTH
GELS
GOLD
GOLD IONS
NANOSTRUCTURES
PVP
REDUCTION
SILVER
SILVER IONS
AMIDES
AZOLES
BLOOD SUBSTITUTES
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
DRUGS
ELEMENTS
HEMATOLOGIC AGENTS
HETEROCYCLIC COMPOUNDS
IONS
LACTAMS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYVINYLS
PYRROLES
PYRROLIDONES
TRANSITION ELEMENTS