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 20 of 21 for “"pH sensors"”.
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Long Period Grating-Based pH Sensors for Corrosion Monitoring
… fabricate and test optical fiber-based chemical sensors for monitoring corrosion from early stages through the entire corrosion event. Although there are several preventative methods under development to address the problem of corrosion degradation, new techniques are still needed that are …
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Investigation and development of titanium nitride solid-state potentiometric pH sensor
The measurement of pH value is crucial parameter in various fields like, drinking water monitoring, food preparation, biomedical and environmental applications. The most common device for pH sensing is the conventional pH glass electrode. While glass electrodes have several advantages, such as …
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Development of new photoluminescent sensing materials, systems and applications for cell analysis
Cell analysis using optochemical sensors represents large and important niche in life and biomedical science. Sensor calibration and detection platforms are critical during sensor fabrication, characterization and application. However, existing calibration setups, platforms, and systems have …
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Novel Electrochemical Methods for Acidity Monitoring: Theory, Design and Application
… the design and development of novel voltammetric pH sensors for buffered, low-buffered and unbuffered media. pH sensors in stagnant and hydrodynamic environments were designed and developed for performing measurements using square wave voltammetry. Chapter 1 introduces the motivation of this …
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Investigation on Ultra-miniature and Ultra-low-power Non-invasive CMOS pH Sensor for Intracellular Monitoring
… compact solution for miniaturized noninvasive pH sensors. Existing solutions to intracellular sensing are mainly through invasive approaches, which will likely damage the target cell. However, learning what is going on inside the cell while keeping the cell alive and safe is highly demanded. …
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Untersuchungen zur Entwicklung einer feldeffektbasierten Biosensoranordnung mit integriertem Referenzsystem
… electrodes were covered with KCl-containing pHEMA or agar as inner electrolyte. The agar membrane of some reference electrodes was additionally covered with different protective layers to reduce the leaching of chloride ions out of the membrane. As protective coatings Nafion, cellulose …
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Nanocrystal-molecule energy transfer conjugates for chemical and biological sensing
… (Chapter II). A reversible and ratiometric NC pH sensor is synthesized by tethering NCs to a squaraine-based pH dye. The presence of an isosbestic point between the two emission maxima from the NC and the dye allows the sensor to be self-calibrating (Chapter III). The ratiometric nature of the …
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Dimensionality reduction and multiscale modeling for the understanding of protein folding and hierarchical self-assembly
… of assembly, and that aggregation in a specific pH range improves peptide alignment. I also identify regions of model parameter space defining particular peptide chemistries that are expected to rapidly agglomerate into fibrils with desirable optoelectronic properties. In sum, this work …
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Materials and designs for 3D conformal electronics with capabilities in cardiac mapping and stimulation
… for building novel electronic devices that physically interface with the human body, its organs and various tissues. Among the wide variety of application scenarios, integration with the heart represents a case that is both promising and challenging. Conformal electronic systems for …
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Sistemas de Pt(II) y Pt(IV) basados en cromóforos 2-arilbenzotiazol: propiedades ópticas y aplicaciones biológicas
… substituted 2-arylbenzothiazole chromophores. It Is divided in a general Introduction, four separate Chapters and an Experimental section. The Pt(II) derivatives incorporate 2-4-(R-phenyl)benzothiazole ligands either with R = alkyne, to obtain trans(bisalkynyl) complexes or R = Br and …
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Quantitative methods for in vitro and in vivo characterization of cell and tissue metabolism
… Metrics for metabolism span tissue oxygen and pH levels and cellular thermal output. This need is present in research and clinical applications both of which are underserved by existing technologies. This thesis presents the development of three distinct technologies: an implantable oxygen …
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Upconversion Nanoparticles for pH Sensing and Imaging
… applications in diagnostics/therapeutics require pH measurement down to the micro or nanoscale to provide relevant subcellular information, but the most widely used optical pH sensors (fluorescent dyes, dye-labeled quantum dots) suffer from drawbacks of photobleaching, blinking, and limited tissue …
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Solution-gated graphene transistors for chemical and biological sensing applications
… processes were developed in order to make graphene-based chemical and biological sensors on different substrates. Single-layer graphene is grown by chemical vapor deposition and then transferred to silicon dioxide as well as PolyEthylene Naphthalate (PEN) substrate, where graphene …
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Sensitivity control of optical fiber biosensors utilizing turnaround point long period gratings with self-assembled polymer coatings
Biosensors have a multitude of important applications in basic research, environmental monitoring, biodefense, and medicine. This research aims to show that Ionic Self-Assembled Multilayers (ISAMs) adsorbed on Long Period Gratings (LPGs) can serve as a highly sensitive, robust, inexpensive …
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Development, manufacture and application of a solid-state pH sensor using ruthenium oxide
The measurement of pH is undertaken frequently in numerous settings for many applications. The common glass pH probe is almost ideal for measuring pH, and as such, it is used almost ubiquitously. However, glass is not ideal for all applications due to its relatively large size, fragility, need for …
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Development and characterization of anti-EGFR protein-drug conjugates for tumor therapy
… drug-to-antibody ratios (DAR) improving the pharmacokinetics and therapeutic index. The formylglycine-generating enzyme (FGE) can be used as a tool for the site-specific oxidation of a cysteine into a Cα-formylglycine (FGly) within the recognition motif CxPxR. A mammalian cell surface display …
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Chemo and biodetection in liquid with organic transistor
… realization of portable devices, i.e. chemical sensors capable to analyse small quantities in situ. Nowadays, the availability of portable devices allows to test those samples which are di�cult or impossible to transport for long distances without degradation. This work concerns the realization …
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Investigation of experimental cell lines and non-invasive online sensor technologies in a 3D bioreactor system for extracorporeal liver support therapy
… the study, the integration of multi-parametric sensors into the bioreactor system was investigated to allow for cell culture surveillance in real-time. For this purpose oxygen and pH sensors (PreSens-Precision Sensing GmbH), as well as ammonia sensors and impedance sensors developed by the …
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Development and Characterisation of a Carbon Based pH Microsensor and Studies on Polypyrrole Nanowires
… of polypyrrole (PPy) into nanowire and bulk morphologies is reported. The electrochemical properties of the different conformations of PPy were examined in order to ascertain their conductivities and surface areas. This could determine the optimisation for further modification of the polymer …
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