Supporting Information
for
Advanced Materials, adma.200600675
© Wiley-VCH 2006
69451 Weinheim, Germany
Supporting Information
Reduction by the End Groups of Poly(vinyl pyrrolidone): A New and Versatile
Route to the Kinetically Controlled Synthesis of Ag Triangular Nanoplates
By Isao Washio,1 Yujie Xiong,1 Yadong Yin,2 and Younan Xia*,1
1
Department of Chemistry, University of Washington, Seattle, Washington 98195 (USA)
2
The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (USA)
*
Corresponding author. E-mail: xia@chem.washington.edu
Figure S1. a) SEM image and b) TEM image of the product at t=20 min that was prepared
under the same condition as in Figure 1. The inset in (a) shows an SEM image, revealing the
side faces of circular nanoplates. The images suggest that the sample contained 80% circular
nanoplates 50 nm in size and 20% spherical nanoparticles 20 nm in size. The inset in (b) shows
the electron diffraction patterns taken from a single circular nanoplate. The strongest spots
(squared) could be indexed to the allowed {220} reflection, the outer spots (triangled) with the
weakest intensity could be assigned to the allowed {422} reflection, and the inner spots (circled)
with a weaker intensity corresponded to the formally forbidden (1/3){422} reflection. The
pattern is consistent with those of the previously reported Ag circular and triangular nanoplates.
2
Figure S2. SEM images (at a lower magnification) of two products shown in Figure 1: a) t=7 h
and b) t=21 h.
3
Figure S3. SEM image of the product that was obtained at t=21 h under the same conditions as
in Figure 1e, except that light was completely blocked from the reaction system by wrapping the
vial with aluminum foil. Because there is essentially no difference between this product and the
one shown in Figure 1e, we believe that light does not play a significant role in the formation of
Ag triangular nanoplates in the present synthesis.
4