The calculated coupled coefficients between SPR of the Cu 2−xS shell and LSPR of the Au NRs is 180 meV, which is much stronger than that of TSPR of Au NRs of 55 meV. The dispersion properties of the coupling of 2−xS NRs with the LSPR of the initial Au core are studied experimentally by changing the length of the Au NRs, which are explained theoretically by the coupled harmonic oscillator model. capped Cu nanoparticles for the solgel reaction, yielding an aqueous CuSiO 2 coreshell suspension with stable and. Herein, we describe the development of an analytical model of LSPR in heterostructure copper sulfide-zinc sulfide nanocrystals. The extinction spectrum of the 2−xS NRs with three coupled resonance peaks is simulated by using the FDTD method, taking into account the electron-transfer effect. Optical Absorption Spectra of Nanocrystal Gold Molecules journal, May 1997. Encapsulated Gold Core/Shell Nanostructures for the Sensitive and Selective Detection of Copper Ions Rui Hu, Taiki Furukawa. Although, for 2S NRs, only TSPR and LSPR peaks can be seen and a redshift arises with the increasing Cu 2S shell thickness, implying that no plasmonic coupling between Au NRs and Cu 2S shell occurred.

With the Cu 2−xS shell increasing (fixed Au NRs), the TSPR peak slightly redshifts and the LSPR and SPR peaks blueshift, owing to competition between the redshift of the refractive index effect and blueshift from the plasmon coupled effect. The extinction spectrum of 2−xS NRs is dominated by the surface plasmon resonance (SPR) of the Cu 2−xS shell, the transverse surface plasmon resonance (TSPR), and the longitudinal surface plasmon resonance (LSPR) of the Au NRs. Dual plasmonic 2−xS core−shell nanorods (NRs) have been fabricated by using a hydrothermal method and plasmon-coupled effect between the Au core and Cu 2−xS shell in the near-infrared (NIR) region.

Copper gold core shell lspr