Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 5945 for “"charge"”.
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Charge control in acoustic charge transport devices
Acoustic charge transport (ACT) devices utilize the acoustoelectric effect in a piezoelectric semiconductor, particularly GaAs, to create buried channel charge transfer devices capable of signal processing functions, especially transversal filtering. Charge control in ACT devices concerns the …
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Thermionic Space Charge Oscillations
Thermionic electrons emitted into a potential well will produce radiation, the frequency of which is determined by the transit time of the electrons. This paper investigates the case where radiation is produced by a vacuum tube in which two Pierce guns face each other, one acting as the emitter, …
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Nuclear charge distribution of Tm¹⁶⁹
<p>The distribution of electrical charge in the nucleus of Tm<sup>169</sup> was determined by measurement of the energies of the X rays of muonic atoms of Tm<sup>169</sup>.</p><p>The values of the energies of the K X rays and the L X rays were calculated from a model assuming an anisotropic Fermi …
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The charge migration in biomolecules
… systems are discussed. The migation of charges, especially that of holes which is considered to be important in both conduction phenomena and physical processes of radiation damage, .is studied in a simplified mode]. We use the Wannier function to represent the access charge, say a hole, …
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Problems in point charge electrodynamics
… of the electromagnetic self force for a point charge. The self force is given by the Abraham-von Laue vector, which consists of the radiation reaction term proportional to the 4-acceleration, and the Schott term proportional to the 4-jerk. In the point charge framework the self force can be …
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Nuclear charge distribution of ¹⁸¹Ta
… them. When a form is chosen for the nuclear charge distribution, a theoretical spectrum can be calculated…The parameters ��, c, and t can then be chosen to make the calculated spectrum coincide for the 3D-2P, and 2P-1S transitions with the observed spectrum.</p> <p>The first part of the …
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Charge exchange in thin foils
… as a positive hydrogen ion, we talk of the three charge states of hydrogen: positive, negative and neutral.
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Charge exchange in thin foils
… as a positive hydrogen ion, we talk of the three charge states of hydrogen: positive, negative and neutral.
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Charge detection in semiconductor nanostructures
In this thesis nanometer scale charge sensors are used to study charge transport in two solid state systems: Lateral GaAs quantum dots and hydrogenated amorphous silicon (a-Si:H). In both of these experiments we use time-resolved charge sensing to study electron transport in regimes that are not …
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Space charge dynamics of liquids.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1970. Sc.D.
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Charge Control of Ionic Polymers
… polymer was associated with the accumulation of charge in the polymer. This thesis will discuss the use of current as a means to better control the accumulation of charge. Better control of the charge will provide more reliable control of the mechanical motion of the polymer. The data presented …
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Study of resonant charge transfer
Experimental measurements ol N₂ resonant charge transfer cross sections were performed. It was found that the energy of electrons used to produce the N₂⁺ ions is an important variable with respect to cross section. An examination of the experimental precision was performed and it was found that the …
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Aspects of charge recombination and charge transport in organic solar cells and light-emitting devices
In this thesis, aspects of charge reconbination and charge transport in organic solar cells and light-emitting devices are presented. These devices show promise relative to traditional inorganic semiconductors. We show that the energy splitting between singlet and triplet CT states in organic …
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Charge Transfer Reactions in Porous Materials
… are calculated. These studies indicate that charge transfer dynamics and equilibria are spatially-dependent in nanoconfined systems. This is reflected in the time-dependent fluorescence and infrared spectra, discussed in Chapters 2 and 3, respectively. Chapter 4 describes quantum chemical …
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Stereochemical effects on intervalence charge transfer
… of stereochemical effects on intervalence charge transfer (IVCT) in di- and trinuclear mixed-valence complexes. The differential IVCT characteristics of the diastereoisomers of polypyridyl complexes of ruthenium and osmium offer a new and intimate probe of the fundamental factors that …
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