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 155 for “"quartz crystal"”.
-
Magnetic quartz crystal microbalance
In this thesis, a new technique for using quartz crystal microbalance (QCM) in magnetic field was explored. This technique would take advantage of the sensitive nature of QCM to vibration changes. The idea is to perturb the QCM vibrations with magnetic materials on it by applying magnetic field. A …
-
Oceanographic applications of quartz crystal thermometry
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1968.
-
Development of a Magnetically Enhanced Quartz Crystal Microbalance
… sensing devices, more specifically: quartz crystal microbalances (QCM). In an attempt to push the detection limit of these devices, a race to find novel methods for enhancing the resonator output has transpired. This study explores the feasibility and implementation of a technique in …
-
Production of nano-templated surfaces for quartz crystal microbalance
This thesis attempted to follow the "true Liquid crystalline templating" route using high concentrations of non-ionic surfactant in the liquid crystal matrix in order to fabricate a high surface area silver electrode onto the gold electrode substrate of an Electrochemical Quartz Crystal …
-
Interactions between molecules and nanostructures using quartz crystal microbalance
The understanding of protein behaviour at the nanoscale is critical for the development of new therapies and biosensing. The assembly of peptides for new therapies are performed on the surface of a biosensor and because of the rough nature of this sample, the characterisation is usually performed …
-
Advanced quartz crystal microbalance techniques applied to calixarene sensing membranes.
Several Quartz Crystal Microbalance (QCM) measurement techniques in conjunction with a series of calix[4]resorcinarene sensing membranes have been successfully exploited for the detection of volatile organic solvents at vapour concentrations below their lower explosive level.The impedance analysis …
-
A study of recognition coating response for quartz crystal microbalances
… sorption interactions for chemically coated Quartz Crystal Microbalances (QCMs). When exposed to the individual vapors of a homologous series of carboxylic acid vapors, a QCM coated with varying thicknesses of poly(ethylenimine) (PEI) coating, produces a linear response that is sensitive and …
-
Interfacial Study of Copper Electrodeposition with the Electrochemical Quartz Crystal Microbalance (EQCM)
The electrochemical quartz crystal microbalance (EQCM) has been proven an effective mean of monitoring up to nano-scale mass changes related to electrode potential variations at its surface. The principles of operation are based on the converse piezoelectric response of quartz crystals to mass …
-
Quartz Crystal Microbalance with Dissipation Monitoring Applications in Polymer Thin Films Analysis
… by a powerful surface analysis instrument, a quartz crystal microbalance with dissipation monitoring (QCM-D). The assembly and interactions of glucan and chitin are crucial for understanding the fungal infection mechanism. Adsorption of mixed-linkage glucan (MLG) onto regenerated chitin …
-
Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
… determinations [1]. In our study, the quartz crystal microbalance (QCM) is used to study the sorption phenomena of DMMP into highly ordered Langmuir-Blodgett (LB) films of TPP. In a saturated environment, DMMP sorbs into the TPP films, binding to TPP in a 1:1 molar ratio. Although …
-
Modeling and control of quartz crystal operated in liquid for bio-sensing application
… event. One promising type of detector is the Quartz Crystal Microbalance (QCM). The QCM is a piezoelectric mass-sensing device. A QCM device works by sending an electrical signal through a gold-plated quartz crystal, which causes a vibration at some resonant frequency. The QCM then measures …
-
Development and characterization of a novel drug dissolution test method using a quartz crystal microbalance
… testing methodology developed using a commercial quartz crystal microbalance (QCM) system to measure dissolution rates of drugs while overcoming the limitations of current dissolution methods. The apparatus was characterized for a sample drug system of benzoic acid dissolved using a dissolution …
-
Observing the Sedimentation of TiO2 Nanoparticles in Aqueous Solution Using a Quartz Crystal Microbalance with Dissipation Monitoring
… of a novel and less expensive approach to the quartz crystal microbalance with dissipation monitoring (QCM-D) is explored. Using a vector network analyzer (VNA) to measure harmonic ranges from the primary to the 89th harmonic of a 5 MHz crystal. The fast read and processing ability of the VNA …
-
Quartz Crystal Microbalance Analysis of Amyloid-Beta Intermediate Aggregate Assembly: Kinetic Evaluation and theImportance of Physiological Parameters
… this growth have not been established.</p> <p>A quartz crystal microbalance (QCM) is employed to isolate specific growth pathways of the peptide and quantify kinetic steps of Aβ aggregation. The ability of the technique to selectively observe aggregate growth via monomer addition to soluble …
-
Use of a quartz crystal microbalance to investigate the mechanical stability of silica xerogel membranes for volatile iodine capture
… to a gas stream and used adhesive-coated quartz crystal, connected to a quartz crystal microbalance (QCM), to collect the particles lost by the adsorbents under flow. Collection of particles change the crystal's resonance, and the change is recorded on the QCM. The QCM data is analyzed to …
-
Studies of Biomacromolecule Adsorption and Activity at Solid Surfaces by Surface Plasmon Resonance and Quartz Crystal Microbalance with Dissipation Monitoring
… surface plasmon resonance spectroscopy (SPR) and quartz crystal microbalance with dissipation monitoring (QCM-D). Carboxymethyl cellulose (CMC) adsorption onto cellulose surfaces from aqueous solutions was enhanced by electrolytes, especially by divalent cations. A combination of SPR and QCM-D …
-
Determination of Ionization Fraction and Plasma Potential in a DC Magnetron Sputtering System Using a Quartz Crystal Microbalance and a Gridded Energy Analyzer
Made available in DSpace on 2017-07-06T18:48:17Z (GMT). No. of bitstreams: 3 Green_Karyn_M_MS.pdf: 35887684 bytes, checksum: 4d8ec8bef5ab4e9e6aabee4e3ff410a5 (MD5) Green_Karyn_M_MS_ABS.pdf: 507343 bytes, checksum: 0d504c63e61c048bbb16c0ee4bce83fa (MD5) license.txt: 4813 bytes, checksum: …
-
Surface Coverage and Structure of Catalytic Monolayers on Au(111) Electrodes
… surface, confirming activity observed with SPM. Quartz crystal microbalance studies found a mass change smaller than that expected for a full monolayer of $\alpha$-dodecatungstosilicate anions, indicating that there is only a monolayer present on the surface and that it remains in the solution …
-
Nichtionische polyethoxylierte Tenside in methansulfonsauren Zinn- und Zinn-Silber-Elektrolyten
… electrochemical depositions in Hull cell, with quartz crystal microbalance, impedance spectroscopy, X-ray diffraction, REM and others were used as methods of characterization.
-
MEMS Biosensor for Water-Immersed Application
… two types of sensors.</p> <p>First, commercial quartz resonators are used to investigate live-cell activity in water-based toxic solutions. I perform toxicity tests using quartz crystal microbalance (QCM). The QCM used in the study has a resonant frequency of 10 MHz and consists of an AT-cut …
Page 1 of 8