X-ray and optical characterizations of DNA-mediated Janus nanostructures

Thestructural and optical properties of DNA-mediated Au-Ag Janusnanostructures (JNs) are comprehensively studied by X-ray and optical techniques. The theoretical model for small angleX-ray scattering of Au-Ag JNs is proposed, and the fitting process is outlined. A hybrid junction consists ofDNA andAg is introduced in order to reconcile the discrepancy between the experimental and simulated optical spectra of Au-Ag JNs. The physical origins and controlling factors of the localized surface plasmon resonance modes are determined, which lay the foundations for managing and exploiting the uniqueplasmonic properties of Au-Ag JNs.

Source: Applied Physics Letters - December 5, 2016 Category: Physics Authors: Geng Wang, Lifeng Xu, Longlong Wu, Ke Meng, Xiao Wang, Zhou Liu, Chunhai Fan and Gang Chen Source Type: research