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An innovative passive near-field 13.56 MHz RFID system for financial payment and national identity smartcard applications is presented. The system utilizes reactive coupling using a slit of defined width in a metal (copper) foil layer to concentrate surface eddy current density in the vicinity of a transponder having a laser-etched antenna structure.
Semiconducting 2D MoS2 flakes produced by liquid phase exfoliation are contacted with metal electrodes, which are defined by electron beam lithography. Electrical analysis of the metal–semiconductor–metal structures reveals high mobilities for individual MoS2 flakes. Thus, scalable liquid‐phase exfoliation of layered semiconductor compounds can yield novel materials with potential uses in future electronic...
A method to exfoliate MoS2 in large quantities in surfactant‐water solutions is described. The layered material tends to be exfoliated as dispersions of thin, relatively defect‐free flakes with lateral sizes of hundreds of nanometers. This method can be extended to a range of other layered compounds. The dispersed flakes can be mixed with nanotubes or graphene to greate functional hybrid materials...
Employing high-yield production of graphene by liquid-phase exfoliation, a series of dispersions with large populations of graphene single and few layers was prepared. Nonlinear optical properties of these graphene dispersions were studied using the open aperture Z-scan technique at 532 nm and 1064 nm. The graphene dispersions exhibit broadband nonlinear scattering induced optical limiting.
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