Search for dissertations about: "Phthalocyanines"

Showing result 1 - 5 of 14 swedish dissertations containing the word Phthalocyanines.

2. 1. Phthalocyanines on Surfaces : Monolayers, Films and Alkali Modified Structures

   Author : Katharina Nilson; Carla Puglia; Joachim Schiessling; Emmanuelle Göthelid; Nils Mårtensson; Guy Le Lay; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic and molecular physics; Phthalocyanines; Surface Science; X-ray Photoelectron Spectroscopy XPS ; X-ray Absorption Spectroscopy XAS ; Scanning Tunneling Microscopy STM ; Density Functional Theory DFT ; Metal-free Phthalocyanine; Iron Phthalocyanine; Zinc Phthalocyanine; Gold; Graphite; Aluminium; Indium Antimony; Molecular adsorption; Monolayer; Film; Alkali; Geometrical structure; Electronic structure; Doping; Atom- och molekylfysik; Physics; Fysik;

   Abstract : The Phthalocyanines (Pc’s) are a group of macro-cyclic molecules, widely investigated due to the possibility to use them in a variety of applications. Electronic and geometrical structure investigations of molecular model systems of Pc’s adsorbed on surfaces are important for a deeper understanding of the functionality of different Pc-based devices. READ MORE

4. 2. Structure and Electronic Properties of Phthalocyanine Films on Metal and Semiconductor Substrates

   Author : Ieva Bidermane; Carla Puglia; Nadine Witkowski; Nils Mårtensson; Luca Giovanelli; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phthalocyanines; silicon 100 ; Au 111 ; photoelectron spectroscopy; scanning tunneling microscopy; surface science; organic molecules on surface;

   Abstract : The current thesis presents fundamental studies of phthalocyanines (Pcs), a group of organic macro-cycle molecules. The use of phthalocyanine molecular films in devices with a variety of possible technological applications has been the reason of the many studies dedicated to such molecules during the last decades. READ MORE

5. 3. Complex Excitations in Advanced Functional Materials

   Author : Johann Lüder; Barbara Brena; Frank de Groot; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray Absorption Spectroscopy; Photoelectron Spectroscopy; Adsorption; Phthalocyanines; Biphenylene; Excitons; Functional Materials;

   Abstract : Understanding the fundamental electronic properties of materials is a key step to develop innovations in many fields of technology. For example, this has allowed to design molecular based devices like organic field effect transistors, organic solar cells and molecular switches. READ MORE

6. 4. Electronic and Geometric Structure of Phthalocyanines on Metals

   Author : Masumeh-Nina Shariati; Maria Novella Piancastelli; Carla Puglia; Kajsa Uvdal; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; monolayer; multilayer; metal-free phthalocyanine; metal phthalocyanine; interaction; intermolecular; adsorbate-substrate; XPS; XAS; STM; DFT; alkali; metallization;

   Abstract : Adsorption of monolayers and multilayers of metal-free and metal phthalocyanines molecules on metal surfaces has been investigated using complementary microscopic and synchrotron-based spectroscopic techniques. It was observed by STM measurements that at monolayer coverage the adsorption direction of the metal-free phthalocyanine molecules with respect to the gold surface vary as a function of temperature, i. READ MORE

7. 5. Electronic and Geometrical Structure of Phthalocyanines on Surfaces : An Electron Spectroscopy and Scanning Tunneling Microscopy Study

   Author : John Åhlund; Carla Puglia; Joachim Schiessling; Emanuelle Göthelid; Nils Mårtensson; Nadine Witkowski; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; PhotoElectron Spectroscopy PES ; X-ray Absorption Spectroscopy XAS ; UltraViolet-Visible absorption spectroscopy UV-Vis ; Scanning Tunneling Microscopy STM ; Phthalocyanine Pc ; Iron Phthalocyanine FePc ; metal-free Phthalocyanine H2Pc ; Zinc Phthalocyanine ZnPc ; Graphite HOPG ; Indium Antimony InSb ; Surface science; Fysik;

   Abstract : Core- and Valence Photoelectron Spectroscopy (PES), X-ray- and Ultraviolet-Visible Absorption Spectroscopy (XAS and UV-Vis), Scanning Tunneling Microscopy (STM) and Density Functional Theory (DFT) calculations are used to study the electronic and geometrical structure of a class of macro-cyclic molecules, Phthalocyanines (Pc), on surfaces. These molecules are widely studied due to their application in many different fields. READ MORE