Field emission resonances

Figure 9. Directional far-field emission patterns of the WG modes in (a) an elliptical (Boriskina, 2003) and (b) a notched (Boriskina, 2005) microdisk resonator.

See Contact stress Hexagonal symmetry 132 Hohenberg-Kohn theorem 113 Hydrogen molecular ion 173 history 173 repulsive force 185 resonance interaction 177 van der Waals force 175 Hydrogen on silicon 336 Image force 56—59, 72, 93 concept 56 effect on tunneling 74 field emission, in 56 jellium model, in 93 observability by STM 72... 

Figure 2 Acquisition of an EPR spectrum for an unpaired 5=1/2 electron, a) Energy-level diagram as a function of magnetic field, b) absorption/emission of microwave energy because of the field of resonance, and c) first derivative of the energy absorption profile, for example, an EPR spectrum.

Carbon nanotube tips are more complex than the nanotube shafts due to lack of symmetry. The termination at the tips causes special features in the local densities of states, which may be regarded as localized states or tip states. The existence of these states were suspected from field emission studies [168]. They have been imaged using STM methods and sharp peaks (resonances) are... 

In the typical PL-detected magnetic resonance experiment, the sample is excited by a laser or an intense lamp, and the intensity of the total PL or a PL band, dispersed by a monochromator, is monitored with a Si photodiode or a thermoelectrically cooled photomultiplier tube. The sample is concomitantly subjected to a slowly swept dc magnetic field and the microwave field chopped at v, . Microwave-induced changes A/ in the total PL intensity I or intensity of an emission band at the field-for-resonance are then detected by the lock-in amplifier. The amplitude A/// of the ODMR signal... 

The direct method includes direct observation by electron microscope and field emission technique structural analysis using X-ray, neutron and electron diffractometry, or channelling technique and also resonance techniques such as ESR, NMR, and Mossbauer absorption. The techniques used in the indirect method include the measurement of a property sensitive to the nonstoichiometric composition, such as lattice constant, density, equilibrium partial pressure, and electric conductivity. The defect structure is estimated from the correspondence between the defect model assumed and the measured change of the property. With the indirect method, it is rather difficult to estimate defect structures more complex than the simple point defect. 

FIGURE 2.68 (a) Relative NMR spin-eeho intensities versus temperature for cyclohexane confined within the pores of titania spherical particles (b) pore size distribution curves of the MTx samples determined by H NMR cryoporometry and BJH method (dashed fines) (c) insert with field-emission (FE) SEM image of MT400. (Adapted with permission from Ryu, S.-Y., Kim, D.S., Jeon, J.-D., and Kwak, S.-Y., Pore size distribution analysis of mesoporous TiOj spheres by H nuclear magnetic resonance (NMR) cryoporometry, J. Phys. Chem. C 114,17440-17445, 2010, Copyright 2010 American Chemical Society.)... 

Localized resonant states are very important in predicting the electronic behavior of carbon cones. They can also strongly influence the field emission properties of cones. 

A further major factor in this comparison with electron image interactions, which, as we have said, are important in vacuum-surface science, particularly in cold field emission of electrons and resonance tunneling. 

FESEM Field emission scanning electron microscopy FRET Fluorescence resonance energy transfer HOMO Highest occupied molecular orbital HP Hexa-para-phenylene LUMO Lowest unoccupied molecular orbital OP Oligofpara-phenylene)... 

Vaccaro P H 1995 Resonant four-wave mixing spectroscopy a new probe for vibrationally-excited species Molecular Dynamics and Spectroscopy by Stimulated Emission Pumping (Advances in Chemistry Series) vol 7, ed H-L Dai and R W Field (Singapore World Scientific) p 1... 

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