The TEM of GO, GO sheets decorated by silver nanoparticles
and silver nanoparticles are shown in Fig. 2. In Fig. 2(a), the TEM
image of GO clearly illustrates that the sheets are flake-like with
wrinkles, which may be the key point leading to a gain in elastic
energy for the quasi-two dimension crystallite to avoid disloca tions caused by thermal fluctuations and keep a meta-stable state
[16]. From the Fig. 2(b), we can see that silver nanoparticles coat
on the graphene oxide sheets. In order to make sure the micro