Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"organic films"”.
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Electro-optical Properties of Ultra-Thin Organic Films
… applications. The thickness of polymer films developed for these applications has decreased dramatically making interfacial effects significant. It is well documented that, in submicron thickness range, both film/substrate & film/air interface are critical. In this study, we probe the …
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Organic lasers and nanostructred organic films for hybrid integration
… polymers (LEPs) are a promising category of organic materials for photonic applications owing to their potential for simple fabrication and availability of materials emitting across the whole visible spectrum. LEPs are already exploited commercially in the case organic light emitting diodes …
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Elastomeric contact printing for sub-micron patterning of organic films
… by which a wide variety of low molecular weight organic materials can be patterned without added temperature, pressure, or chemical processing, with just the use of relief-patterned polymeric (PDMS) stamps. It is determined that the diffusion of organic molecules into the polymer matrix is a …
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Second-Order Nonlinear Optical Characteristics of Nanoscale Self-Assembled Multilayer Organic Films
Ionically self-assembled monolayer (ISAM) films are typically an assemblage of oppositely charged polymers built layer by layer through Coulombic attraction utilizing an environmentally friendly process to form ordered structures that are uniform, molecularly smooth and physically robust. ISAM …
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Investigation of the Photoenhanced Reduction of Nitrogen Dioxide (NO2) on Organic Films and Above Soils as the Missing Source of Daytime Tropospheric Nitrous Acid (HONO)
… of gas-phase NO2 on various phenolic-containing organic films using a wetted-wall flow tube (WWFT) photoreactor. Experimental methods are discussed in detail. A time-dependent model for non-equilibrium conditions incorporating both the chemistry and diffusion for predicting a best-fit reaction …
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Surfactant Behavior in Atmospheric Aerosols
… climate system. While aerosols contain a mix of organic and inorganic material, a sub-fraction of the organic material in atmospheric aerosols is surface active, arranging itself into organic films at the gas-aerosol interface. These films can inhibit trace gas uptake, affecting atmospheric …
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Visible spectrometer utilizing organic thin film absorption
… spectrum, based on absorption characteristics of organic thin films. The device uses fundamental principles of linear algebra to reconstruct spectral components of a signal from the transmission through an organic thin film. Best possible performance of the device is characterized, effects of …
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Organic multilayer photoconductor utilizing a spacer layer
… photoconductors composed of small molecule organic films. It is experimentally demonstrated that the utilization of a spacer layer can produce an order of magnitude enhancement in quantum efficiency over the of a spacer layer can produce an order of magnitude enhancement in quantum …
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Electronic Coupling Effects and Charge Transfer between Organic Molecules and Metal Surfaces
… structure-properties relations of thin epitaxial organic films. Clear correlations between the spectra and the differently intense coupling to the respective substrates are found. While rather broad and almost structureless spectra are obtained for a quaterrylene (QT) monolayer on Au(111), the …
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Characterization of Local field effect in organic film using pressure technique
… on the excitonic energy levels in amorphous organic thin films for optoelectronic device applications. Compression of organic films causes a decrease in intermolecular spacing and, through solvation effects, lowers the exciton transition energy. A series of steady-state photoluminescence (PL) …
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Thin film integrated optical waveguides for biosensing using local evanescent field detection
… be modified by attaching proteins or patterning organic films. This design also allows the evanescent field intensity to be measured using near field scanning optical microscopy or a silicon photo detector array. The fabrication and characterization of a waveguide device with a coupled light …
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Optical Properties of Organic Semiconductors: from Submonolayers to Crystalline Films
We have measured the optical properties of films of the organic semiconductors PTCDA (3,4:9,10-perylene-tetracarboxylic dianhydride) and HBC (peri-hexabenzocoronene), prepared by Organic Molecular Beam Expitaxy (OMBE), on different substrates by means of Differential Reflectance Spectroscopy (DRS). …
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Rapid Classification of Imaged Objects Using Molecular Factor and Multivariate Optical Computing
… accomplished with filter elements made of thin organic films deposited on IR-transparent substrates and allows a system response to be tuned to a specific analyte. Unique algorithms were written in-house using MatLab (The Mathworks, Natick, MA). The algorithms used a lock-in computing technique …
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Measurement and Control of Slip-Flow Boundary Conditions at Solid-Gas Interfaces
… of gases, and to inhalants. The effect of water films, gas species, organic films, and electric fields on gas flow was studied. Water films had a large, but complex effect. On bare hydrophobilic glass, the tangential momentum accommodation coefficient (TMAC) for nitrogen on hydroxyl-terminated …
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Examining the Effects of Applied Potential on the Surface Charge of Functionalized Monolayers for Site-Directed Ionic Self Assembly
… of potential to acid or base terminated organic films immobilized on electrodes results in the ionization of the terminal groups. The ionization of these groups using applied potential provides conditions favorable the control of polyelectrolyte deposition to the monolayer surface. …
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Electronic properties of metal-organic and organic-organic interfaces studied by photoemission and photoabsorption spectroscopy
In this work systematic studies of the organic semiconductor CuPc have been presented. In general the investigation can be devided in three parts. In the first one we have studied the electronic structure of clean CuPc thin film. The next two parts are devoted to organic-organic and metal–organic …
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Oberflächenphotospannung an dünnen organischen Schichten auf Metallsubstraten
Gegenstand dieser Arbeit ist die Untersuchung der Ober?ächen- bzw. Grenz?ächenphotospannung (SPV) an dünnen organischen Schichten auf Metallsubstraten. Besonderes Augenmerk gilt dabei dem System dünner Schichten von 3,4,9,10-Perylen- Tetracarbonsäure-Di-Anhydrid (PTCDA) auf einem Au(110)-Kristall. …