Search for dissertations about: "electron emission"

Showing result 21 - 25 of 301 swedish dissertations containing the words electron emission.

  2. 21. Surface harpooning Johan Strömquist

    Author : Johan Strömquist; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; molecular affinity; charge transfer; surface harpooning; chemiluminescence; electron emission; dissociation;

    Abstract : .... READ MORE

  4. 22. Electron and Energy Transfer in Supramolecular Complexes Designed for Artificial Photosynthesis

    Author : Helena Berglund Baudin; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; artificial photosynthesis; electron transfer; energy transfer; ruthenium; manganese; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

    Abstract : In the society of today the need for alternative energy sources is increasing. The construction of artificial devices for the conversion of sunlight into electricity or fuel seems very attractive from an environmental point of view, since these devices are based on processes that does not necessarily generate any harmful biproducts. READ MORE

  5. 23. Dynamics and Fluctuations in Single-Electron Tunneling Devices

    Author : Niklas Dittmann; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quantum dot; time-dependent density-functional theory; perturbation theory; single-electron source;

    Abstract : In recent years, it has been routinely achieved to build nanoscale electronic devices, which generate current pulses carrying only a single elementary charge. Realizations of these single-electron emitters are based on time-dependently driven quantum dots, on single-electron turnstiles built from superconductor/normal-metal hybrid structures, and also on nanosystems employing Lorentzian voltage pulses or surface acoustic waves. READ MORE

  6. 24. Heat Transport from On-demand Single-Electron Sources

    Author : Nastaran Dashti; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fluctuations and noise; thermoelectric devices; energy-selective detector; single-electron source; charge and heat currents;

    Abstract : The controlled injection of quantized charge excitations from single-electron emitters into nanoscopic conductors sets the basis for many important applications ranging from metrology to the emerging field of quantum optics with electrons. Successful implementation of these applications relies not only on achieving control on the precision of the particle emission, but also on the energetic properties of the injected particles. READ MORE

  7. 25. Electron beam profile measurements and emittance manipulation at the MAX-laboratory

    Author : Åke Andersson; Lunds universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optics; quantum excitation; emittance; synchrotron radiation; electron beam; lattice; Accelerator; storage ring; diffraction; Physics; Fysik;

    Abstract : The emittances of the electron beams at the MAX-laboratory accelerator system have been studied. Apart from the build-up of the diagnostic tools for precise determination of the beam spatial profiles, the objectives have been: a) to verify the accelerator design emittances at low currents and to try to determine the emittances also at high currents; b) to investigate possibilities to manipulate the emittances. READ MORE