2D material Ag@Au nanoparticle Au-ZnO/C2H6O2 Fano resonances MHD SAW devices SERS SQUID Technology: general issues analytical solution beryllium oxide chemical vapor transport core–shell structure crystal growth dielectric constants dielectric properties electromagnetic electronic materials ellipsometry entropy generation error analysis fentanyl glucose graphene quantum dots heat transfer high-accuracy measurement hybrid nanofluid lithium Niobate low dimensional magnetism magnetic chains