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.
Results
Showing 1 to 20 of 429 for “"Langmuir"”.
-
Two dimensional Langmuir-Blodgett magnets
… of quasi-two-dimensional magnets formed by the Langmuir-Blodgett deposition of manganese stearate on aluminium foil has been measured at several points between 20 K and 0.4 K. Large area samples of 101 and 11 layers were detected by a SQUID magnetometer. With the magnetic field parallel to the …
-
Adiabatic thermal Child-Langmuir flow
… one-dimensional adiabatic thermal Child-Langmuir flow theory. In this theory, a self-consistent Poisson equation is developed through the use of the fluid-Maxwell equations and an adiabatic equation of state. The adiabatic equation of state is also a statement of normalized rms thermal …
-
Langmuir Monolayers of Minimal-linker Dimeric Surfactants
Surfactants are ubiquitous, useful compounds of immense practical significance in key industries ranging from drug-delivery to agrochemicals. The performance of these commercially valuable products depends largely on their chemical structure. The objective of the research presented in this thesis …
-
Dynamics of Langmuir circulation in oceanic surface layers
… structures driven by wave-current interaction (Langmuir circulation) are responsible for maintaining the oceanic mixed layer. Langmuir circulations dominate the near-surface vertical transport of momentum and density when the characteristic scale for forcing (defined as the Craik-Leibovich …
-
Contaminated Sweeping Langmuir Probes on Sounding Rocket Platforms
<p>Sweeping Langmuir Probes (SLPs) are one of the most commonly used probes on sounding rocket missions. They offer measurements of plasma density, electron temperature, and both relative and absolute payload charging. One of the major implementation challenges, however, is contamination on the …
-
Dynamics of Langmuir circulation in oceanic surface layers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
-
Synthesis of polyionic tetraazaporphyrins and their Langmuir-Blodgett properties.
… 5, and 10 methylene groups were studied by the Langmuir Blodgett technique at different pH values of the aq. subphase. Rigid Langmuir films of molecules with face-on orientation of the macrocycle were obtained, and could be transferred onto hydrophilic substrates by Z-deposition. Langmuir films …
-
Langmuir Probe Instrument Suite for Mesosphere Turbulence Experiment Mission
<p>The Langmuir probe technique is the predominant in-situ plasma diagnostic technique, and is arguably the only measurement technique that is universally own on every sounding rocket investigation. Earth's mesosphere region (80-120 km) is a host of many dynamic phenomena such as the noctilucent …
-
Development of planar langmuir probes for supersonic plasma flows
Langmuir probes are a long established tool for the investigation and char- acterization of plasmas. Diagnostic use of planar Langmuir probes in sta- tionary low temperature plasmas is a well understood and long established technique. When the plasma possesses a drift velocity greater than the ion …
-
The geometry of interacting liquid domains in Langmuir monolayers
… und Benetzung zweidimensionaler (2D) Phasen von Langmuir-Monolagen im lokalen thermodynamischen Gleichgewicht untersucht. Eine Langmuir-Monolage ist ein isoliertes 2D System von Surfaktanten an der Wasser/Luft-Grenzfläche, in dem kristalline, flüssigkristalline, flüssige oder gasförmige Phasen …
-
Poly(L-Lactic Acid) Langmuir Monolayers at the Air/Water Interface and Langmuir-Blodgett Films on Solid Substrates: Phase Behavior, Surface Morphology, and Crystallinity
… processes. This dissertation provides the Langmuir-Blodgett (LB) technique as a mechanism for fabricating PLLA substrates at temperatures where PLLA degradation is uncommon. In order to fully understand surface morphologies of PLLA LB-films, studies of Langmuir monolayers at the air/water …
-
Electronic Properties and Langmuir-Blodgett Films of Discotic Organic Semiconductors
… substituted tetraazaporphyrin (TAP) dyes in Langmuir-Blodgett (LB) monolayers (Chapter 5) is the generation of self-assembled monolayers with the elusive face-on orientation of the TAP macrocycles. Monolayers are formed only by the TAP derivatives with the longest tested aliphatic spacer …
-
Developing Fixed-Bias Langmuir Probes for Multi-Point Constellation Deployments
… in the early 20th century, electrostatic Langmuir probes have proved invaluable in terrestrial and interplanetary ionospheric sounding applications. When deployed aboard rocket and satellite platforms, these probes yield high-cadence, in-situ measurements of key plasma parameters such as …
-
An investigation of electron tunnelling and conduction in Langmuir films
Langmuir films offer the possibility of obtaining unifo:r:m, wellordered, insulating structures of defined and controllable thickness. In this thesis, techniques for the fabrication of these films and the nature of the conduction process in single and multi-layer films of stearic acid/stearate …
-
Impact of Langmuir isotherm on production behavior of CBM reservoirs
… develop type curves which predict the impact of Langmuir Isotherms on production behavior on a Coalbed Methane reservoir in order to evaluate the economic feasibility and to maximize potential recovery. In order to achieve this objective, the impact of Langmuir isotherm constant on production …
-
Effectiveness factors in spherical catalyst particles: Langmuir-Hinshelwood rate equations.
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1965
-
A Study into Data Analysis of Varying Types of Langmuir Probes
<p>Langmuir probes are ubiquitously used for in-situ measurements of plasma parameters. These probes have been placed on many different platforms, including experimental sounding rockets for measurements in mesosphere-lower-thermosphere, and also onboard satellites to obtain data sets over an …
Page 1 of 22