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Representative images of different defect structures of the noble metal nanoparticles. In (a) and (b) high-resolution TEM (HRTEM) images of the photodeposited Au nanoparticles are shown: (a) is a five-fold twinned particle on top of the titania and (b) defect-free nanoparticles inside the titania. (c–e) show plasma-deposited nanoparticles: (c) is representative for small, defect free nanoparticles, (d) of those with stacking faults and (e) of those with grain boundaries.
