Search for dissertations about: "Atomic forces"

Showing result 1 - 5 of 69 swedish dissertations containing the words Atomic forces.

  2. 1. On the interactions in cellulose systems : surface forces and adsorption

    Author : Monika Österberg; KTH; []
    Keywords : cellulose; hemicellulose; xylan; lignin; surface forces; adsorption; polyelectrolyte; SFA; AFM; ESCA; Langmuir-Blodgett films; chitosan; steric forces; bridging; adhesion;

    Abstract : In this thesis the interactions in cellulose systems havebeen studied with emphasis on surface forces and adsorptionphenomenon. The study was limited to surfaces and polymers ofinterest for papermaking. READ MORE

  4. 2. Hydrophobic surfaces: Effect of surface structure on wetting and interaction forces

    Author : Petra M Hansson; Per M. Claesson; Agne Swerin; Adam C Simonsen; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; hydrophobic surface; superhydrophobic surface; atomic force microscopy; surface forces; capillary forces; cavitaion; surface roughness; friction; wetting; confocal Raman; contact angles; surface preparation; Langmuir-Blodgett;

    Abstract : The use of hydrophobic surfaces is important for many processes both in nature and industry. Interactions between hydrophobic species play a key role in industrial applications such as water-cleaning procedures and pitch control during papermaking but they also give information on how to design surfaces like hydrophobic mineral pigments. READ MORE

  5. 3. Investigating nano-scale viscous and elastic forces withintermodulation : Studies in multifrequency atomic force microscopy

    Author : Per-Anders Thorén; David B. Haviland; Greg Haugstad; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic Force Microscopy; Nonlinear dynamics; Soft materials; High- speed friction measurements; Modeling and numerical simulations; Fysik; Physics;

    Abstract : Investigating visco-elastic forces at the nanometer-scale is important to thecharacterization of soft materials. A quantitative force measurement can be ob-tained using an atomic force microscope (AFM) with a calibrated force transducer(the AFM cantilever). READ MORE

  6. 4. Ionic liquids : The solid-liquid interface and surface forces

    Author : Nicklas Hjalmarsson; Mark W Rutland; Rob Atkin; Enrico Gnecco; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ionic liquids; solid-liquid interface; surface forces; nanotribology; atomic force microscopy; quartz crystal microbalance; Jonvätskor; gränsskiktet mellan fasta ytor och vätskor; ytkrafter; nanotribologi; atomkraftsmikroskopi; kvartskristallmikrovåg; Kemi; Chemistry;

    Abstract : Ionic liquids (ILs) present new approaches for controlling interactions at the solid-liquid interface. ILs are defined as liquids consisting of bulky and asymmetric ions, with a melting point below 373 K. Owing to their amphiphilic character they are powerful solvents but also possess other interesting properties. READ MORE

  7. 5. Atomic transport in optical lattices

    Author : Henning Hagman; Claude Dion; Daniel Comparat; Umeå universitet; []
    Keywords : Ultra-cold atoms; optical lattice; laser cooling; directed transport; Brownian motor; Brownian motion;

    Abstract : This thesis includes both experimental and theoretical investigations of fluctuation-induced transport phenomena, presented in a series of nine papers, by studies of the dynamics of cold atoms in dissipative optical lattices. With standard laser cooling techniques about 108 cesium atoms are accumulated, cooled to a few μK, and transferred into a dissipative optical lattice. READ MORE