Moreover, these core-shell nanocubes could be converted into Au-based hollow nanostructures containing the original Au seeds in the interiors through a galvanic replacement reaction. 3 nm for the shell thickness at which the plasmon excitation of the Au cores would be completely screened by the Ag shells. Polyvinyl pyrrolidone (PVP) was used as capping agent, and ascorbic acid (C 6 H 8 O 6) and sodium borohydride (NaBH 4) were used as reducing agents. By comparing with the extinction spectra obtained from theoretical calculations, we derived a critical value of ca. A simple chemical reduction method is used to prepare colloidal bimetallic CuAg coreshell (CuAg) nanoparticles. We further studied the localized surface plasmon resonance properties of the nanocubes as a function of the Ag shell thickness. ![]() Our results clearly indicate that CTAC worked much better than CTAB as a capping agent in both the syntheses of Au seeds and core-shell nanocubes. We also investigated the growth mechanism by examining the effects of seeds (capped by CTAC or cetyltrimethylammonium bromide(CTAB)) and capping agent (CTAC vs CTAB) on both size and shape of the resultant core-shell nanocrystals. ![]() The thickness of the Ag shells could be finely tuned from 1.2 to 20 nm by varying the ratio of AgNO(3) precursor to Au seeds. ![]() The AuAgSiO 2 electrode exhibits a photo-conversion efficiency of 23.42 (486. The synthesis involved the use of single-crystal, spherical Au nanocrystals of 11 nm in size as the seeds in an aqueous system, with ascorbic acid serving as the reductant and cetyltrimethylammonium chloride (CTAC) as the capping agent. To tailor the AuAgSiO 2 LSPR effect by varying the Ag shell thickness, the AuAgSiO 2 coreultra-thin shell nanoparticles are fabricated and introduced into DSSC for improving light harvesting and decreasing the recombination of photo-carriers. This paper describes a facile method for generating core-shell nanocubes with edge lengths controllable in the range of 13.4-50 nm.
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