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- W4313889786 abstract "We report a method to experimentally control the heterogeneous nucleation and growth of Au nanoparticles on the surface of amorphous Se (a-Se) nanospheres. When a AuIII precursor is added into a colloidal suspension of a-Se nanospheres, galvanic replacement occurs between them and the resultant Au0 atoms then heterogeneously nucleate and grow from the surface of the a-Se nanospheres. As a unique feature of this system, the Au0 atoms can only be produced on the surface of the a-Se nanospheres in the nucleation stage. Once Au nuclei are formed on the surface at the very beginning of a synthesis, they will serve as the preferential sites for further deposition of Au0 atoms, making it possible to control the number of Au nanoparticles on each nanosphere and the morphology of the final product. The dependence of the initial reduction rate on the pH can be used to obtain Se–Au hybrid nanoparticles containing one, two, three, and multiple Au nanoparticles on the surface of each a-Se nanosphere. The presence of Au patches on the hybrid nanoparticles offers an experimental handle to optimize the ligand distribution for the achievement of enhanced cellular uptake and cytotoxicity for the a-Se nanospheres." @default.
- W4313889786 created "2023-01-10" @default.
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- W4313889786 date "2023-01-09" @default.
- W4313889786 modified "2023-10-16" @default.
- W4313889786 title "Controlling the Nucleation and Growth of Au on <i>a</i>-Se Nanospheres to Enhance Their Cellular Uptake and Cytotoxicity" @default.
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- W4313889786 doi "https://doi.org/10.1021/jacs.2c11053" @default.
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