Solubilization of specific anions into an aqueous CTAB (cetyltrimethylammonium bromide) or CTAC (cetyltrimethylammonium chloride) solution leads to the formation of rod-shaped micelles and becomes a key shape-directing factor to generate one-dimensional Au structures. Through this strategy, Au bipyramids and Au fibers are successfully synthesized in a controllable fashion. In addition, unique star-shaped Au multipod nanoparticles (GMN) and core-shell GMN@Pt or GMN@Pd nanoparticles with high surface area have been fabricated. The structural features of each branch in these nanoparticles are finely tuned. The catalytic performances are morphology-dependent and synergistically improved in the bicomponent nanosystems. Spherical nanoparticles (multi-Au@SiO2 NPs) and nanowires (multi-Au@SiO2 NWs) with a core comprising multiple Au nanodots and silica shell are fabricated in high yields through reverse (water-in-oil) microemulsion-based methods. By simple treatments, york-shell multi-Au@SiO2 NPs and peapod-like one-dimensional Au nanoparticles array within hollow silica nanotubes (pp multi-Au@SiO2 NTs) can be successfully synthesized. These hollow multi-Au@SiO2 nanosystems can be used as efficient nanoreactors for fabrication of hybrid nanoparticles assembly and catalysis.

Soft-templating strategies for anisotropic Au nanomaterials and hollow multi-Au@SiO2 nanosystems

253rd National Meeting (2017)

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