Essays about: "kemisk fysik"

Showing result 16 - 20 of 23 essays containing the words kemisk fysik.

  1. 16. Upgrade of the Graphitization System for 14C AMS Analyses

    University essay from Lunds universitet/Fysiska institutionen

    Author : Philip Dalsbecker; [2013]
    Keywords : 14C; AMS; Accelerator mass spectrometry; radiocarbon; vacuum; carbon-14; Physics and Astronomy;

    Abstract : For decades, accelerator mass spectrometry (AMS) has been used for radiocarbon dating. The background of this technique is outlined along with an in-depth look at the graphitization process used to prepare samples for AMS analysis. READ MORE

  3. 17. Temperature and Concentration-Dependent Absorption and Fluoresence of Thaits J-Aggregate Dye, Reveal Supra-Molecular Architecture

    University essay from Lunds universitet/Kemiska institutionen

    Author : Michael Kontaiteh Fonjang; [2012]
    Keywords : Kemisk fysik; Chemistry;

    Abstract : The narrow and redshirted absorption bands of J–aggregates relative to the monomer absorption, coupled with their ability to coherently and incoherently delocalise exciton wave function over several hundreds of molecules has made this class of molecules very important in high technology fields. This has provided new impetus to study the properties of J–aggregates and to explore the mechanism involved in their production. READ MORE

  4. 18. Vibronic Excitons in Molecular Systems

    University essay from Lunds universitet/Kemiska institutionen

    Author : Andreas Andersson; [2012]
    Keywords : Kemisk fysik; Chemistry;

    Abstract : Absorption and emission of photons by any molecule is strongly in uenced by the molecular environment. When several chromophores are packed together their spectral properties are known to be altered and this is canonically ex- plained by quantum theory as electromagnetic interactions between the dipole moments. READ MORE

  5. 19. Spectroscopy across Stellar Surfaces

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Author : Hiva Pazira; [2012]
    Keywords : Physics and Astronomy;

    Abstract : Stars as we observe them are point source objects and their measured spectra are integrated over the stellar disk. Since the beginning of stellar spectroscopy, stellar parameters are calculated from these spectra. READ MORE

  6. 20. Synthesis and Characterization of PbS Quantum Dots

    University essay from Lunds universitet/Kemiska institutionen

    Author : Abdelrazek Mousa; [2011]
    Keywords : Kemisk fysik; Chemistry;

    Abstract : Colloidal semiconductor nanocrystals or quantum dots (QDs) have recently attracted much attention because of their unique electronic and optical properties and potential for a wide range of applications. Near-infrared (NIR) PbS QDs were synthesized using oleic acid (OA) as a surfactant for stabilizing the nanocrystals. READ MORE