نتایج جستجو برای: dimensional conductivity
تعداد نتایج: 445641 فیلتر نتایج به سال:
sulfonated poly (ether ether ketone) (speek) with a low degree of sulfonation (ds = 40%) was prepared for proton exchange membrane fuel cells (pemfc). poly (ether ether ketone) (peek) was sulfonated in concentrated h2so4 under n2 atmosphere and characterized by the hydrogen nuclear magnetic resonance (h-nmr) technique. after preparation of the speek polymer, the obtained polymer was dissolved i...
Magnetoacoustic tomography with magnetic induction (MAT-MI) is a hybrid imaging modality proposed to image electrical conductivity contrast of biological tissue with high spatial resolution. This modality combines magnetic excitations with ultrasound detection through the Lorentz force based coupling mechanism. However, previous studies have shown that MAT-MI method with single type of magnetic...
This paper presents results of a new numerical treatment of 3D MOSFET simulation with nonplanar interfaces. The simulations have been carried out by MINIMOS 5 our fully three-dimensional simulation program. Three-dimensional effects like threshold shift for small channel devices , channel narrowing and the enhanced conductivity at the channel edge have been successfully modeled.
We find the high magnetic field ~B! microwave conductivity @Re(sxx)# of a two-dimensional electron system containing an antidot array increases strongly with frequency ~f! in the regime with Landau filling 1/3,n,2/3. At microwave f , Re(sxx) vs B exhibits a broad peak centered around n51/2. On the peak, Re(sxx) at 10 GHz can be five times its dc-limit value. Unlike the dc-limit conductivity, th...
The past several years has witnessed a surge of interest in organometallic trihalide perovskites, which are at the heart of the new generation of solid-state solar cells. Here, we calculated the static conductivity of charged domain walls in n- and p- doped organometallic uniaxial ferroelectric semiconductor perovskite CH3NH3PbI3 using the Landau-Ginzburg-Devonshire (LGD) theory. We find that d...
Layer-by-layer-stacked chemical vapour deposition (CVD) graphene films find applications as transparent and conductive electrodes in solar cells, organic light-emitting diodes and touch panels. Common to lamellar-type systems with anisotropic electron delocalization, the plane-to-plane (vertical) conductivity in such systems is several orders lower than its in-plane conductivity. The poor elect...
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