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This paper reports for the first time a novel highly-ordered three-dimensional (3D) petal-like arrayed structure (PLAS) which can serve as an ideal substrate for surface-enhanced Raman scattering (SERS). The structure is achieved by anisotropically etching a hexagonal close-packed silica nanoparticle (SNP) bilayer coated on a silicon substrate through evaporation-induced self-assembly, and then depositing...
This paper presents a surfactant-assisted complex sol–gel method for the controlled preparation of Zinc Oxide (ZnO) nanoparticles using zinc nitrate and citric acid as starting material. ZnO nanoparticles with a pure wurtzite structure were obtained after calcination at 773 K. The effects of the citric acid concentration, the pH, and the surfactants on the average particle size and morphology of the...
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