Two-Dimensional Device Simulation

In order to assess the two key parameters of an OFET, i.e. the mobility of the charge carriers and the injection barrier, we have performed a two-dimensional 

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Medici Two-Dimensional Device Simulation Program Version 2002, User s Manual, Avanti Corporation, TCAD Businenti Corporation, TCAD Business Unit, Fremont, CA, July 2000. 

Close to the drain contact, the simulated potential profile for Uq = -30 V is in good agreement with the observed potentiometry trace shown in Figure 20.2. Based on previous potentiometry measurements on polymer OFETs revealing a substantial potential drop at the drain contact [13], two-dimensional device simulations have suggested that the mobility close to the contacts... 

Figure 20.5 (a) Electrostatic potential and (b) hole density obtained in the two-dimensional device simulation for = -30 V, within the first 0.4 pm from the source contact. 

Figure 20.4 (a) Results of a two-dimensional simulation of a pentacene OFET with geometric parameters close to the bottom-contacted device investigated with potentiometry, for // = 0.014 cm V s and an effective injection barrier of 0.42 eV, and (b) construction of an injection barrier of 0.73 eV out of the effective barrier of 0.42 eV and the electric field close to the source contact, as obtained in the simulation for a gate voltage of Uq = -30 V. 

Figure 1. Current Nanoscale Optofluidic Sensor Arrays, (a) 3D rendering of the NOSA device, (b) 3D rendering after association of the corresponding antibody to the antigen immobilized resonator, (c) Experimental data illustrating the successful detection of 45 pg/ml of anti-streptavidin antibody. The blue trace shows the initial baseline spectrum corresponding to Fig. la where the first resonator is immobilized with streptavidin. The red trace shows the test spectra after the association of anti-streptavidin. (d) Finite difference time domain (FDTD) simulation of the steady state electric field distribution within the 1-D photonic crystal resonator at the resonant wavelength, (e) SEM image demonstrating the two-dimensional multiplexing capability of the NOSA architecture.

Stability is an important issue for a material which is intended to be used as a building block of device applications. Even though perfect two-dimensional crystals are proven to be unstable, graphene is found to be stabilized by corrugations in the third dimension. Understanding the effect of GNR width on the stability is therefore also a central issue for possible applications. Molecular dynamics computer simulations using empirical interatomic potentials predict that... 

Lerch R., Simulation of piezoelectric devices by two- and three-dimensional finite elements, IEEE Trans. Ultrason. Ferroelectrics Ereq. Contr., 37, 233-247, 1990. 

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