Highly Ordered Metallic Nanostructures Fabricated by Template Techniques

4 Highly Ordered Metallic Nanostructures Fabricated by Template Techniques 

NSL—often called colloidal lithography (CL)— is an effective technique using self-assemblies of polystyrene (PS) micro- or nano-particles on solid surfaces as 2-or 3-dimensional masks for metal deposition (Zhang et al. 2010). The size and shapes of the close-packed nanospheres and the holes between them, in addition to the metal deposition conditions, such as evaporation angle or specific deposition technique (e.g., sputtering, thermal deposition), influence the achieved metallic patterns. A different kinds of metallic nanostructures can he obtained (Fig. 3.10)  

Vapour deposition of 100-200 nm metal layer surface forms the film over nanospheres (EON) (Baia et al. 2(X)5 Baia et al. 2008). 

3 Basics of Surface-Enhanced Raman Scattering (SERS) 

Removing of a PS mask gives a periodical nanostructure array. In 1995, Hulteen and Van Duyne (1995) reported the preparation of periodic Ag triangle arrays with areas of 4-25 pm using double layer PS sphere mask. 

---