PT Au NRs with average length of 210 ± 10 nm and width of 34 ± 1 nm were prepared as previously described by Pérez-Juste et al., with minor modifications (see Experimental Section). 49 The purified PT Au NRs show a shape yield around 99%, (Figure S1A–C, Supporting Information ) and can be used as seeds after redispersion in 10 mM benzyldimethylhexadecylammonium chloride (BDAC).
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