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 “"time-gated"”.
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Time-gated ballistic imaging through scattering media with applications to liquid spray combustion
Includes bibliographical references (pages 119-130).
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A Time-Gated Fluorescence Instrument and Its Applications Using Mn-Doped I(II)-III-VI Nanocrystal Probes
… this work, two versions of a low-cost, portable, time-gated fluorescence intensity measurement instrument were developed with the primary aim of utilizing Mn-doped I(II)-III-VI nanocrystals (Mn:AgZnInS/ZnS and Mn:CuZnInS/ZnS core/shell) as long-lifetime fluorescent probes for sensing applications. …
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The photophysics properties of lanthanide luminescent probes
… study of the luminescence quantum yield, lifetimes and the number of water molecules coordinated to lanthanide luminescent probes based on biphenylyl-7-amino-4- methyl-2(1H)-quinolinon (Bi-cs124) derivatives have been carried out using a time- resolved fluorescence assay (TRFA). Bi-cs124 was …
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Observation and Characterization of Trends in the Ionization of the Warm Absorber Photoionized Plasma Experiment at Z
… uses a cm-scale gas cell placed several centimeters from the z-pinch to contain neon gas of atom number densities 10$^{17}$ -- 10$^{18}$ cm$^{-3}$. Windows along the line of sight to a spectrometer allow (1) the radiation from the z-pinch to pass through the cell and drive the system and (2) …
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Advanced Raman spectroscopy for bioprocess monitoring
… discovered almost 90 years ago. It took a long time until the importance of Raman spectroscopy was fully understood and accepted for process industrial applications. Still today the usage is limited to a small application area. During the last decades advances in the production of spectroscopic …
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Theoretical and Experimental Studies of Radiation from Z-Pinch Complex Wire Arrays and Applications
… of diagnostics, in particular a newly developed time-gated hard x-ray spectrometer to gain an understanding as to how these plasmas radiate in time, particularly in the 0.7 - 4.4 Å range. The experiments predominately took place on the 1.7 MA Zebra generator at the Nevada Terawatt Facility (NTF) …
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Characterization and applications of pulsed millisecond glow discharge sources
… discrimination of isobaric interferences using time-gated detection, an example would be the determination of 40Ca + from 40Ar+. Further exploitation of these temporal regimes can be applied to molecular analysis, where concurrent molecular and structural information can be obtained.
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Fluorescent silicon nanocrystals for bioimaging
… to two-photon excitation, and can be conjugated to a wide variety of targeting molecules. Silicon (Si) nanocrystal quantum dots in particular exhibit bright, size-dependent emission with visible to near infrared wavelengths and are biocompatible, making them potentially interesting for in …
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Development and application of correlative STED and AFM to investigate neuronal cells
… of a range of STED techniques (cw-STED, time-gated STED, pulsed STED and RESOLFT) were compared, identifying that pulsed STED theoretically has the highest photon efficiency. A pulsed STED microscope, which uses adaptive optics, was then designed, developed and characterised. The …
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Precise optical manipulation techniques for exploring neuronal function
… in the analysis of their function, namely time-gated holographic two-photon photostimulation and femtosecond laser dendrotomy. At the start of this thesis, no illumination technique had been able to activate synapses along the three-dimensional (3D) dendritic arbour of a neuron using …
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Precise optical manipulation techniques for exploring neuronal function
… in the analysis of their function, namely time-gated holographic two-photon photostimulation and femtosecond laser dendrotomy. At the start of this thesis, no illumination technique had been able to activate synapses along the three-dimensional (3D) dendritic arbour of a neuron using …
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Development of luminescent probes for ultrasensitive detection of biopolymers, their complexes, and living cells
… of their long-lived emission signal in time- resolved mode, which avoids short-lived background fluorescence of the medium. Two model carbostyril fluorophores (cs 124-CH_3 and cs 124-CF_3) were modified by inclusion of two spacers (diamino and bi-phenyl) for the attachment of amine and …
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Reducing interferences in glow discharge spectroscopies using transient operation and collision -induced dissociation
… ions. This could lead to future applications for time-gated detection methods in optical and mass spectrometric analyses that minimize interferences due to plasma species.;Collision-induced dissociation of strongly bound molecular interferences in a quadrupole ion trap is examined as a potential …
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The design and synthesis of fluorescent peptides and disaccharides for tumour imaging.
… most effective energy transfer mediated long-lifetime luminescent combinations, for subsequent attachment to the cyclic peptide as long-lifetime imaging agents which would allow the use of time-gated technology to eliminate troublesome background fluorescence. This chemistry was published. Near-IR …
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Luminescent Lanthanide Complexes and Nanoparticles for Biological Applications
… applications because of their long emission lifetimes, sharp emission bands, color purity, resistance to photobleaching, and enhanced signal-to-noise ratios. Their practical use in aqueous and biological systems requires organic chromophores or other organic ligands that provide water solubility …
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Radiatively Cooled Magnetic Reconnection Experiments Driven by Pulsed Power
… wire array, driven by a 20 MA peak, 300ns rise time current generated by the Z pulsed-power machine (Sandia National Labs). The load generates oppositely-directed supersonic, super-Alfvénic, collisional plasma flows with anti-parallel magnetic fields, that generate a reconnection layer …
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Development of methods for the detection of chemical and biological warfare agents
… pulse widths and duty cycles. For the first time, the behavior of argon doubly charged species was characterized in these pulsed plasmas. Whereas the goal of Chapter 2 was to understand the fundamental characteristics of the pulsed glow discharge, Chapters 3 and 4 strive to expand its future …
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Single-Molecule Characterization of Photophysical and Colloidal Properties of Biocompatible Quantum Dots
… high photostability and long fluorescent lifetimes (on the order of tens of nanoseconds) — make them attractive probes in experiments involving long observation times, multicolor and time-gated detection. Photophysical properties were investigated at the ensemble and single-molecule level for …