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 47 for “"Responsive Materials"”.
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Synthesis and Applications of Novel Responsive Materials
This thesis describes the synthesis of responsive organic polymers which show potential for use in a variety of applications. A series of pyridine terminated m-phenylene ethynylene oligomers were synthesized. When trans-dichlorobis(acetonitrile)palladium was added to a solution of these oligomers, …
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Porphyrins and metalloporphyrins as field-responsive materials
… as candidates for molecular ferroelectric materials. These include the iron(II) porphyrinate polymer: \lbrack Fe$\sp{\rm II}$(TPP)(pyCN)\rbrack$\sb\infty$ (where TPP = 5,10,15,20-tetraphenylporphyrinate(2$-$); pyCn = 4-cyanopyridine); iron(III) porphyrinate polymers: \lbrack Fe$\sp{\rm …
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Glucose-responsive materials for self-regulated insulin delivery
Achieving normal glycemic control in diabetic patients is nearly impossible given the pharmacokinetics after subcutaneous injection of commercial insulin. Glucose- regulated insulin delivery (GRID) would vastly improve glycemic control while reducing (i) the required frequency of subcutaneous …
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Development of responsive materials for diffraction-based chemical sensing
… ions and other species that employ chemically-responsive metal oxide and conducting polymer grating elements. These materials undergo reversible redox processes upon interaction with a chemical analyte that subsequently induces changes in the materials refractive index. The two key design …
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Synthesis and Application of Well-Defined Stimuli Responsive Materials
… which provided interesting surface structured materials without the need for development or post curing. The same material was used to prepare isotropic colloidal particles of the polymer. These latex particles were transformed to ellipsoids in response to irradiation by linearly polarized …
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Materials of interaction : responsive materials in the design of transformable interactive surfaces
Materials that embody computational properties are reshaping the ways in which we design, interact and communicate. This thesis looks at the topic of form transformation and how to bring the programmability and versatility of digital forms into the physical world. The focus is placed on the …
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Design and development of stimuli-responsive materials: pH sensitive polymersomes and poly(olefin sulfone)s
Stimuli-responsive materials are materials exhibit a response when exposed to specific external triggers. These materials are powerful tools for material development in areas such as encapsulation, photoresists, sensors, self-healing materials, drug delivery, and transient electronic devices. A …
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Developing Nucleic Acid-Based Sensors and Actuators
… development of a strategy to design nucleic acid-responsive materials using the CRISPR-associated nuclease Cas12a as a user-programmable sensor and material actuator. I exploit the programmability of Cas12a to actuate hydrogels containing DNA as an anchor for pendant groups or as a structural …
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Thermo-responsive and electroconductive shape-memory polymer composites for useful applications
Shape-memory polymers (SMPs) are stimuli-responsive materials with the ability to undergo a large recoverable deformation upon the application of an external stimulus. International research interest into the shape-memory effects (SMEs) of these polymers is rapidly growing. Unique polymer …
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Colloidal structures with novel functions
… last two decades, many kinds of environmentally responsive materials based on the chemical nature of gels and adsorption of surfactants at various interfaces are proposed. For the development of colloidal systems showing novel functionality we have designed various experimental systems for …
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Self-assembly and dynamics of colloidal dispersions in steady and time-varying external fields
A diverse set of functional materials can be fabricated using dispersions of colloids and nanoparticles. If the dispersion is responsive to an external field, like dielectric and charged particles in an electric field or paramagnetic particles in a magnetic field, the field can be used to …
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Optimized Peptide Nanomaterials as Delivery Vehicles for Hydrophobic Metal-Based Anticancer Agents
<p>Enzyme-responsive materials have been well explored, particularly as therapeutic and diagnostic agents. In this thesis we demonstrate that anionic self-assembling peptides can be utilized as delivery vehicles for metal-based hydrophobic payloads. The tunability of the system is highlighted as …
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The Educational Experiences of Low Socioeconomic, Hispanic, Emergent Bilingual, Elementary Students: A Sequential Mixed Methods Study from Texas
… bioecological systems theory, and culturally responsive leadership theory, the study collected data through questionnaires and interviews. Quantitative data were analyzed with descriptive statistics, and qualitative data with thematic and narrative analyses. Findings revealed challenges …
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Building (as) performance : a material approach to adaptive architecture
… and more durable architectural solution to responsiveness. Responsive materials such as shape memory alloys (SMA's) and electroactive polymers offer new possibilities for architecture. Furthermore, an understanding of the difference between kinetics in architecture and kinetics in mechanical …
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Simulation of Weak Polyelectrolyte Brushes
Using molecular simulations, the stimuli-responsive behavior of weak polyelectrolyte brushes (PEBs) and weak polyampholyte brushes (PABs) was examined with respect to pH, salt concentration, monomer sequence and grafting density. While PEBs have only acidic or basic monomers, PABs contain both …
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Insights for designing mechanochromic spiropyrans from first principles dynamics and minimum energy pathways
… This may allow the development of novel stress-responsive materials. In this work, we use first principles dynamics and constrained optimization approaches to investigate the mechanochemical activity of a spiropyran molecule. When a particular bond is broken, the spiropyran changes color. In …
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High performance materials for artificial muscles and energy storage devices
Artificial muscles (i.e., stimuli-responsive materials) are muscle-like materials and devices that mimic muscle's functionality (e.g., contraction, rotation, and bending) in different aspects. Some of the common performance metrics used for evaluating artificial muscles are cycle life, …
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Synthesis and characterisation of new tetrathiafulvalene-oligofluorene derivatives for moisture indicators
The term 'smart materials' refers to a category of materials that are able to dynamically respond to external stimuli through a change in physical and/or chemical properties. The versatility afforded by organic materials makes them attractive candidates in the development of new sensing materials. …
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Multivalent Programmable Interactions Between Lipid Vesicles: Towards Responsive Soft Materials
… of freedom to develop novel lipid-based soft responsive materials with potential ’real-world’ applications, such as in molecular sensing. In Chapter 1, the motivations for this work are introduced, before introducing the requisite background literature and general experimental techniques in …
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