Investigation of Various Types of Nanorods as Sensitive Surface-Enhanced Raman Scattering Substrates

摘要: Core-shell-isolated nanorods can be used to amplify the signals of target cancer antigen molecules. Recent research has suggested that these feature surface-enhanced Raman scattering (SERS) superior those nanoparticles. In this study, nanorod geometrical models based on core-shell-isolated nanocapsule morphology were employed analyze scattered power density in three-dimensional spaces. Superior conventional cross-section field analysis method, average method presentation could verify enhancement effects from all possible positions surface. The numerical results study also compared with experimental described literature. resonance reached maximal value when radius ${\rm Au/SiO}_{2}$ and Ag/SiO}_{2}$ was 20 nm. At an incident wavelength 751 nm, Au/Al}_{2}{\rm O}_{3}$ achieved spacing $d=30~{\rm nm}$ . Conversely, Au/TiO}_{2}$ maximum $d=40~{\rm When core Au, shell thickness $h$ 1 nm produced a resonant intensity same as it by without shells. indicated stronger peak ray illuminated major-axis plane nanorods. curvature nanorods, clearly shifted toward UV range. four symmetric arrangement highest 30 This serve key reference for design highly sensitive SERS substrates.