Twinned nanocrystals such as decahedra and icosahedra have been employed as seeds in a set of studies for the growth of various bimetallic Janus nanocrystals38–42 For instance our group reported the s
PDDA在这个合成过程中起到了两个关键作用。首先,它能够将AgNO3转化为AgCl,从而减缓还原反应的速率,有利于控制Ag的生长。其次,它能够作为一个包埋剂,覆盖在Ag的{100}晶面上,从而使新生的Ag原子只能从{111}晶面生长,从而实现了在Pd十二面体晶种上沿着〈111〉方向的单侧生长。
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