Transmission electron microscopy gold nanorods

In order to assemble gold nanorods (aspect ratio 2.4) by the click reaction, one batch of nanorods capped with 4-azidobutane-l-thiol, A, and another with hex-5-yn-l-thiol, B, were reacted in the acetonitrile-water mixture under standard conditions [12], The occurrence of the click reaction was established by infrared spectroscopy [13], The product of the reaction was investigated by electronic absorption spectroscopy and transmission electron microscopy. Fig. 1 compares the electronic absorption spectra of the gold nanorods before and after the click reaction between the A and B type nanorods. Isolated gold nanorods show transverse and longitudinal plasmon bands around 520 nm and 630 nm, respectively (see Fig. la). 

In the case of gold nanorods prepared in aqueous solution by the seed-mediated growth method, we have performed high-resolution transmission electron microscopy (HRTEM) and electron diffraction experiments as a function of growth time to crystallographically characterize the nanorods [45]. It is well-known that for the face-centered cubic (fee) structure of gold, the (111) face is the most stable, close-... 

Scheme 1 Schematic representation of an individual (a) SWCNT [56], (b) transmission electron microscopy images of MTAB functionalized gold nanorods, (c) SEM images of PU nanofiber composite. Scale bars 1 pm [57]...

Figure 8.5 Extinction (absorption) spectrum and transmission electron microscopy (TEM) image (inset) of gold nanorods. Nanorods of 11 nm diameter and 65 nm length showed...

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