Li-doped ZnO (LZO) aggregated nanoparticles are used as an insulating layer in SnO2 nanocomposite (SNC) photoanodes to suppress the recombination process in dye-sensitized solar cells (DSSCs). Various weight percentages of SnO2 nanoparticles (SNPs) and SnO2 nanoflowers (SNFs) were used to prepare SNC photoanodes. The photocurrent-voltage characteristics showed that the incorporation of an LZO i...

─ Due to the limited size of antenna and electromagnetic loss of human head tissue, implantable miniaturized antennas suffer low radiation efficiency. This work presents simulation and analysis of implantable antennas for a wireless RF-powered brain machine interface applications. The accuracy and stability of antenna input impedance simulation are presented. The effects of the implanted antenn...

The insulating state of matter is characterized by the excitation spectrum, but also by qualitative features of the electronic ground state. The insulating ground wavefunction in fact: (i) displays vanishing dc conductivity; (ii) sustains macroscopic polarization; and (iii) is localized. The idea that the insulating state of matter is a consequence of electron localization was first proposed in...

We consider the problem of finite resistance $R$ in superconducting films with geometry a strip width $W$ near zero temperature. The is generated by vortex configurations phase field. In first type process, quantum slip, worldline 2+1 dimensional space-time space-like (i.e., winds time and space). second type, tunneling, time-like two spatial directions) connects opposite edges film. For modera...

We consider the problem of recovering an isotropic conductivity outside some perfectly conducting or insulating inclusions from the interior measurement of the magnitude of one current density field |J |. We prove that the conductivity outside the inclusions, and the shape and position of the perfectly conducting and insulating inclusions are uniquely determined (except in an exceptional case) ...

We perform semilocal and hybrid density-functional theory (DFT) studies of the Sn/Ge(111) surface to identify the origin of the observed insulating sqrt[3]×sqrt[3] phase below ∼30  K. In contrast with the semilocal DFT calculation predicting a metallic 3×3 ground state, the hybrid DFT calculation including van der Waals interactions shows that the insulating ferrimagnetic structure with a sqrt[...

We have investigated the dispersion interaction in hydrogen chain models via density functional theory-based symmetry-adapted perturbation theory using the asymptotically corrected PBE0 energy functional. The quasimetallic and the insulating prototype systems were chosen to be hydrogen chains with equally and alternately spaced H(2) units, respectively. The dependence of the dispersion energy o...

Interest has risen among utilities in using natural ester (NE) insulating oils in transformers as a substitute for conventional mineral oil. However, present understanding on aging behaviour of NE-paper composite insulation system and knowledge on application of existing condition monitoring tools for NE-based insulation are inadequate. This limits the cost effective and reliable field applicat...

In order to avoid leakage currents, we are using an atomically flat insulating substrate. This poses additional challenges, as (1) there are few tools which enable measurements on insulating surfaces, and consequently, (2) there is little known about the growth of metals and molecules on insulators. We are using ultrahigh vacuum noncontact atomic force microscopy (NC-AFM) to examine some of the...