NDLI: Morphology and size-controlled synthesis of silver nanoparticles in aqueous surfactant polymer solutions

Content Provider	Springer Nature Link
Author	Shervani, Zameer Ikushima, Yutaka Sato, Masahiro Kawanami, Hajime Hakuta, Yukiya Yokoyama, Toshirou Nagase, Takako Kuneida, Hirobu Aramaki, Kenji
Copyright Year	2007
Abstract	We have employed a number of reducing and capping agents to obtain Ag(0) metallic nanoparticles of various sizes and morphologies. The size and morphology were tuned by selecting reducing and capping agents. Spherical particles of 15 and 43 nm diameter were obtained when 1 wt% aqueous starch solution of AgNO3 precursor salt was reduced by d(+)-glucose and NaOH, respectively, on heating at 70 °C for 30 min. Smaller size particles obtained in the case of d(+)-glucose reduction has been attributed to the slow reduction rate by mild reducing agent d(+)-glucose compared to strong NaOH. Conducting the reduction at ambient temperature of silver salt in liquid crystalline pluronic P123 and L64 also gave spherical particles of 8 and 24 nm, respectively, without the addition of any separate reducing agent. NaOH reduction of salt in ethylene glycol (11 g)/polyvinyl pyrolidone (PVP; 0.053 g) mixture produced large self-assembled cubes of 520 nm when smaller (26–53 nm) star-shaped sharp-edged structures formed initially aggregated on heating the preparation at 190 °C for 1 h. Increasing the amount of PVP (0.5 g) in ethylene glycol (11 g) and heating at 70 °C for 30 min yielded a mixture of spherical and non-spherical (cubes, hexagons, pentagons, and triangle) particles without the addition of an extra reducing agent. Addition of 5 wt% PVP to 1 wt% aqueous starched solution resulted in the formation of a mixture of spherical and anisotropic structures when solution heated at 70 °C for 1 h. Homogeneous smaller sized (29 nm) cubes were synthesized by NaOH reduction of AgNO3 in 12.5 wt% of water-soluble polymer poly(methyl vinyl ether) at ambient temperature in 30 min reaction time.
Starting Page	403
Ending Page	410
Page Count	8
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	286
Issue Number	4
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-11-25
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silver nanoparticles Synthesis in green solvents Capping agents Silver nanocubes Silver nanostars Food Science Characterization and Evaluation of Materials Soft Matter, Complex Fluids Physical Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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