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Showing result 6 - 10 of 12 swedish dissertations matching the above criteria.

  2. 6. Multiscale Modelling of a Nanoelectromechanical Shuttle

    Author : Caroline Huldt; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; DFT; Nanoelectromechanics; Mesoscopics; Shuttle; Multiscale;

    Abstract : Nanoelectromechanical systems couple mechanical and electronic degrees of freedom creating a new type of electrical components. The nanoelectromechanical shuttle consists of a double junction with a movable central island. READ MORE

  4. 7. Calculations of Electronic Properties of Metal Surfaces and Superlattices

    Author : Stella Papadia; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Investigations of some aspects of electronic properties of metal surfaces and superlattices are presented in this Thesis. The calculations are based on Density-Functional methods. The first topic is resonances at free-electron-like metal surfaces. READ MORE

  5. 8. Giant Dipole Resonances as Probes of Local Environment in Molecules, Clusters and Solidsl

    Author : Jarek Luberek; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; single center; photoionization; fullerene; coupled channels; LDA; giant dipole resonance; embedded; time-dependent local density;

    Abstract : In this thesis, I study effects of the local environment on the giant dipole resonances (GDR) in lanthanides and actinides. The effects of embedding in jellium, bonding in small molecules and incorporation into different fullerene systems are studied. READ MORE

  6. 9. Reactivity of Metal Clusters with Diatomic Molecules

    Author : Lotta Holmgren; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nbn; cluster; reactivity; Rhn; NO; D2; CO; N2; laser vaporization; Wn; Nin; photoionization; time-of-flight mass spectrometer; ionization potential; Cun; O2; Vn;

    Abstract : The reactivity of transition-metal clusters, in the approximate size range 10-60 atoms, with diatomic molecules has been investigated. A pulsed beam of neutral clusters is produced by a laser-vaporization source and passed through a low-pressure reaction cell containing the reactive gas. READ MORE

  7. 10. The mechanics in two nanosized systems : Size effect and threshold field

    Author : Martin Olsen; Håkan Olin; Ulf Lindefelt; Sven Öberg; Mittuniversitetet; []
    Keywords : ;

    Abstract : This thesis investigates the mechanics in two nanosized system. Paper I investigates a size effect in a cantilever nanowire affecting its resonance frequency. Paper II reveals a threshold field for the formation of a mound by the diffusion of surface atoms on a substrate under a STM-tip. READ MORE