Polyol Synthesis of Silver Nanoparticles: Use of Chloride and Oxygen to Promote the Formation of Single-Crystal, Truncated Cubes and Tetrahedrons

By Benjamin J. Wiley, Thurston Herricks, Yugang Sun, Younan Xia. 2004

894 citations recorded by the source corpus.

Single-crystal cubes and tetrahedrons of silver with truncated corners/edges have been prepared for the first time in high yields by reducing silver nitrate with ethylene glycol heated to 148 °C in the presence of poly(vinyl pyrrolidone) and a trace amount of sodium chloride. These nanoparticles were relatively monodisperse in size and shape, and their dimensions could be readily controlled in the range of 20 to 80 nm by varying the reaction time and other experimental parameters. We propose that the defects inherent in twinned nuclei of silver led to their selective etching and dissolution by chloride and oxygen (from air), leaving only the single crystalline ones to grow into nanoscale cubes and tetrahedrons.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/56a756be6b53e83d9fd3ccd37318fe831f3745b9

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In Biomedical Engineering

In Electrical and Electronic Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Bimetallic Nanoparticles: Enhanced Magnetic and Optical Properties for Emerging Biological Applications (2018, methodology): “demonstrated the large scale synthesis of cubic silver nanoparticles with controllable shapes by using the polyol process [108].”
Shape-Controlled Synthesis of Silver Nanoparticles for Plasmonic and Sensing Applications (2009, background): “Trace amounts of NaCl are added to promote oxidative etching of all twinned structures, but in this case, the reaction is stopped before the single-crystal seeds can grow to large sizes and be stabilized by PVP [ 31 , 32].”