Fabrication of 3D nanostructures using block copolymer and colloid lithography.
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초록
내용
Surface-enhanced Raman scattering (SERS) is an effective technique for biochemical and chemical detection, utilizing the enhancement of electromagnetic signals by metallic nanoparticles. To understanding SERS, the fabrication of various metallic nanostructures is essential. In this study, we focus on the fabrication of 3D nanostructures using block copolymer and colloidal lithography techniques. Polystyrene-b-Polydimethylsiloxane and Polystyrene-b-Poly(2-vinyl pridine) were advantageous as they form nanostructures induced by external stimuli such as heat, solvents. Since the template design also affects the internal nanostructure,this process, we employed colloidal masks, and anisotropic wet etching to create various widths of inverted pyramid templates. These templates directed the self-assembly of block copolymers into various 3D structures. The 3D nanostructures formed in the inverted pyramid templates were metalized to enhance Raman signals and characterized by electron microscopy.