Sökning: "carrier diffusion and mobility"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden carrier diffusion and mobility.

1. 1. Molecular associations and transport properties of amphiphiles and gastrointestinal mucin in aqueous solution

   Författare :Géraldine Lafitte; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysikalisk kemi; transport properties; diffusion NMR; Magnetic resonance imaging; Physical chemistry; hydrophobic association; electrostatic repulsion; gel; Mucin; Surfactant;

   Sammanfattning : An effective uptake/absorption of drug formulations involve many processes; one being the transport of the active molecule through the mucus layer. The mucus layer is a complex mixture of biological molecules. Among them, mucin is the molecule that mainly provides the gel properties of the layer. LÄS MER

3. 2. Optical studies of carrier transport and fundamental absorption in 4H-SiC and Si

   Författare :Paulius Grivickas; KTH; []
   Nyckelord :;

   Sammanfattning : The Fourier transient grating (FTG) technique and a novelspectroscopic technique, both based on free carrier absorption(FCA) probing, have been applied to study the carrierdiffusivity in 4H-SiC and the fundamental absorption edge in4H-SiC and Si, respectively. FTG is a unique technique capable of detecting diffusioncoefficient dependence over a broad injection interval rangingfrom minority carrier diffusion to the ambipolar case. LÄS MER

4. 3. Sublimation Growth and Performance of Cubic Silicon Carbide

   Författare :Remigijus Vasiliauskas; Rositza Yakimova; Mikael Syväjärvi; Didier Chaussende; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Silicon carbide (SiC) is a wide band gap semiconductor satisfying requirements to replace silicon in devices operating at high power and high frequency at high temperature, and in harsh environments. Hexagonal polytypes of SiC, such as 6H-SiC and 4H-SiC are available on the power device markets. LÄS MER

5. 4. Suspended particulate matter, sedimentation and early diagenetic processes in the Kalix River estuary, northern Sweden

   Författare :Anders Widerlund; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

   Sammanfattning : Many important reactions controlling the transfer of elements from the continents to coastal waters and the oceans are taking place in estuaries. For many elements, estuaries can act as filters, capable of reducing the river load of dissolved and particulate elements to the oceans. LÄS MER

7. 5. Ionic transport of α-alumina below 1000°C : an in-situ impedance spectrosocpy study

   Författare :Johan Öijerholm; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; α-alumina; in-situ impedance spectroscopy; molecular dynamics; spark plasma sintering; conductivity; microstructure; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Ionic conductivity of metal oxides is critical for the function of a broad range of different components, such as electrolytes in solid oxide fuel cells and alloys designed for high temperature applications. In both cases the ionic conductivity can be studied by in situ impedance spectroscopy, which is also able to reveal information on the dielectric properties of the metal oxides, and in some cases the influence of their microstructure. LÄS MER