Figure 12

TEM images of the CdSe-seeded CdS nano-heterostructures with controlled, varying degrees of Au deposition: CdSe/CdS nanorods with ca. 40 nm length and an aspect ratio of ca. 8 exposed to increasing concentrations of Au precursor, resulting in Au deposited at (a) one end, (b) both ends, and (c) throughout the rod, respectively; (d) HRTEM image showing a gold nanoparticle at the apex of the nanorod. The measured d-spacing values from the visible lattice fringes of 0.24 and 0.34 nm were assigned to Au (111) and CdS (002), respectively.⁶⁴ Copyright 2010, Wiley-VCH.