倾斜L形手性结构的制备以及圆二色性

在单层聚苯乙烯小球模板上,制备了大面积倾斜L形手性结构.通过倾斜角沉积技术,在小球的一侧生长二氧化硅,在二氧化硅上面沉积金属层;在垂直方向沉积另一金属层,使两个金属层具有不同高度从而形成倾斜L形手性结构.研究发现,通过控制二氧化硅的厚度,可以实现倾斜L形手性结构的圆二色性的调控.数值模拟结果表明,倾斜L形手性结构的圆二色性机制符合Born-Kuhn模型理论.

Fabrication and Plasmonic Chirality of Tilted-L-shaped Nanostructure

Large scale tilted-L-shaped chiral nanostructures were fabricated using oblique angle deposition on polystyrene nanosphere templates.SiO2 layer is deposited on the polystyrene nanosphere templates and the Ag layer is deposited on the SiO2 layer to form a metallic arm of tilted-L-shaped chiral nanostructures.Another metallic arm is deposited in the perpendicular direction on the polystyrene nanosphere templates directly.The chirality of tilt-L-shaped chiral nanostructures originated from the different altitude of two metallic arms.By manipulating the thickness of SiO2 layer the circular dicroism can be easily manipulated.Finite element method was used to perform the simulation of tilt-L-shaped chiral nanostructures.Simulation results demonstrate that the circular dicroism mechanism of tilt-L-shaped chiral nanostructures can be explained by chiral plasmonic Born-Kuhn model.