نتایج جستجو برای: diffusion length

تعداد نتایج: 465368  

Journal: :journal of optoelectronical nano structures 0
masoud jabbari department of electrical engineering, marvdasht branch, islamic azad university, marvdasht, iran. ehsan razmkhah department of electrical engineering, fasa branch, islamic azad university, fasa, iran.

in this paper the effects of transmittance, dispersion angle and diffusion length on the quantum efficiency of solar cells (qesc) have been simulated and investigated. optical path technic is used for simulation. the results show that base thickness, diffusion length, dispersion angle, number of optical confinement path and transmission angles have an extremely effects on the qesc. simulation r...

Ehsan Razmkhah Masoud Jabbari,

In this paper the effects of transmittance, dispersion angle and diffusion length on the quantum efficiency of solar cells (QESC) have been simulated and investigated. Optical path technic is used for simulation. The results show that base thickness, diffusion length, dispersion angle, number of optical confinement path and transmission angles have an extremely effects on the QESC. Simulation r...

Journal: :Energy & Environmental Science 2012

Journal: :Journal of magnetic resonance 1998
Stepisnik

By using the particle probability density we analyze the spin echo attenuation of particles, diffusing in a bounded region. It provides a means to expand a nonuniform spin phase distribution into a series of waves that characterize the geometry and boundary conditions of confinement. Random motion disrupts the initial phase structure created by applied gradients and consequently discords its st...

Journal: :NMR in biomedicine 1998
J Pfeuffer U Flögel W Dreher D Leibfritz

Intracellular diffusion properties of water in F98 glioma cells immobilized in basement membrane gel threads, are investigated with a pulsed-field-gradient spin-echo NMR technique at diffusion times from 6 to 2000 ms and at different temperatures. In extended model calculations the concept of 'restricted intracellular diffusion at permeable boundaries' is described by a combined Tanner-Kärger f...

Journal: :Physical review letters 2006
Y M Wang Robert H Austin Edward C Cox

We used single-molecule imaging techniques and measured the one-dimensional diffusion of LacI repressor proteins along elongated DNA to address the long-standing puzzle of why some proteins find their targets faster than allowed by 3D diffusion. Our analysis of the LacI transcription factor's diffusion yielded four main results: (1) LacI diffuses along nonspecific sequences of DNA in the form o...

Journal: :Physical review. E 2017
Yuto Hosaka Kento Yasuda Ryuichi Okamoto Shigeyuki Komura

We discuss the hydrodynamic collective effects due to active protein molecules that are immersed in lipid bilayer membranes and modeled as stochastic force dipoles. We specifically take into account the presence of the bulk solvent that surrounds the two-dimensional fluid membrane. Two membrane geometries are considered: the free membrane case and the confined membrane case. Using the generaliz...

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