Ag and Au monometallic and bimetallic colloids: Morphogenesis in amphiphilic block copolymer solutions

Toshio Sakai; Paschalis Alexandridis

doi:10.1021/cm051757y

Ag and Au monometallic and bimetallic colloids: Morphogenesis in amphiphilic block copolymer solutions

Toshio Sakai
, Paschalis Alexandridis

Department of Chemical and Biological Engineering

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

84 Scopus citations

Abstract

We report here a facile synthesis of Ag colloids with various morphologies (e.g., spherical nanoparticles, plates, wires) through autoreduction of silver nitrate (AgNO ₃) in formamide solutions containing poly(ethylene oxide)-polypropylene oxide) (PEO-PPO) block copolymers at ~100 °C. The PEO-PPO amphiphilic block copolymers act in tandem as reducing, stabilizing, and morphogenic agents. Judicious selection of conditions leads to spherical Au-Ag core-shell nanoparticles or Ag-Au bimetallic nanonetworks (e.g., spherical Au or Ag nanoparticles connected by Ag or Au nanowires, respectively) that are generated in the same solution ("one pot") without additional agents and/or energy input.

Original language	English
Pages (from-to)	2577-2583
Number of pages	7
Journal	Chemistry of Materials
Volume	18
Issue number	10
DOIs	https://doi.org/10.1021/cm051757y
State	Published - May 16 2006

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author = "Toshio Sakai and Paschalis Alexandridis",

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AU - Sakai, Toshio

AU - Alexandridis, Paschalis

PY - 2006/5/16

Y1 - 2006/5/16

N2 - We report here a facile synthesis of Ag colloids with various morphologies (e.g., spherical nanoparticles, plates, wires) through autoreduction of silver nitrate (AgNO 3) in formamide solutions containing poly(ethylene oxide)-polypropylene oxide) (PEO-PPO) block copolymers at ~100 °C. The PEO-PPO amphiphilic block copolymers act in tandem as reducing, stabilizing, and morphogenic agents. Judicious selection of conditions leads to spherical Au-Ag core-shell nanoparticles or Ag-Au bimetallic nanonetworks (e.g., spherical Au or Ag nanoparticles connected by Ag or Au nanowires, respectively) that are generated in the same solution ("one pot") without additional agents and/or energy input.

AB - We report here a facile synthesis of Ag colloids with various morphologies (e.g., spherical nanoparticles, plates, wires) through autoreduction of silver nitrate (AgNO 3) in formamide solutions containing poly(ethylene oxide)-polypropylene oxide) (PEO-PPO) block copolymers at ~100 °C. The PEO-PPO amphiphilic block copolymers act in tandem as reducing, stabilizing, and morphogenic agents. Judicious selection of conditions leads to spherical Au-Ag core-shell nanoparticles or Ag-Au bimetallic nanonetworks (e.g., spherical Au or Ag nanoparticles connected by Ag or Au nanowires, respectively) that are generated in the same solution ("one pot") without additional agents and/or energy input.

UR - https://www.scopus.com/pages/publications/33745588577

U2 - 10.1021/cm051757y

DO - 10.1021/cm051757y

M3 - Article

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SN - 0897-4756

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SP - 2577

EP - 2583

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 10

ER -

Ag and Au monometallic and bimetallic colloids: Morphogenesis in amphiphilic block copolymer solutions

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