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 153 for “"polydimethylsiloxane (PDMS)"”.
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Peeling models for polydimethylsiloxane (PDMS)
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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Lubrication Forces in Polydimethylsiloxane (PDMS) Melts
The flow properties of polydimethylsiloxane (PDMS) melts at room temperature were studied by measurement of lubrication forces using an Atomic Force Microscopy (AFM) colloidal force probe. A glass probe was driven toward a glass plate at piezo drive rates in the range of 12 – 120 μm/s, which …
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Exploration of large scale manufacturing of polydimethylsiloxane (PDMS) microfluidic devices
… of the current manufacturing process of polydimethylsiloxane (PDMS) parts and the emergence of PDMS use in biomedical microfluidic devices addresses the need to develop large scale manufacturing processes for the fabrication of said devices. Casting PDMS parts is found to be the best mass …
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Modeling and control of rapid cure in polydimethylsiloxane (PDMS) for microfluidic device applications
Polydimethylsiloxane (PDMS) is an important thermosetting elastomer for microfluidic devices because it can replicate nano-scale features and form flexible membranes useful for microactuation. PDMS is used extensively in research environments because it is readily available and biocompatible. …
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Mechanical and electrical characterization of carbon Black-doped closed-cell Polydimethylsiloxane (PDMS) foam
Carbon Black-doped Polydimethylsiloxane (CB-PDMS) can be used as a pressure sensing material due to its piezoresistive properties. The sensitivity of such a sensor is in part dependent on the stiffness of the material. A closed-cell CB-PDMS foam is being explored as a possible flexible, …
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Centrifugal casting and fast curing of polydimethylsiloxane (PDMS) for the manufacture of micro and nano featured components
The thermosetting resin polydimethylsiloxane (PDMS) is commonly used to prototype micro and nano featured components. In the field of microfluidics, PDMS-based devices have been used for cell sorting, cell culturing, microbioreactors, DNA sequencing, and immunoassays. In energy-related …
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Surface wettability studies of PDMS using flame plasma treatment
… this thesis was able to oxidize the surface of Polydimethylsiloxane (PDMS) in a fraction of a second. It was found to be a much faster way to modify PDMS surface wettability than the current technologies. The surface wettability of Polydimethylsiloxane (PDMS) treated with flame plasma was …
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Experimental characterization of a coupled deformation-diffusion theory for elastomeric materials
… in a variety of applications. In this thesis, polydimethylsiloxane (PDMS) samples were swollen in pentane in order to experimentally characterize the transient and steady-state swelling behavior of this system, and to extract material properties in order to fully characterize a coupled …
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Development of Super Hydrophobic Surfaces using Silica Nanoparticles
… silica (SiO2) nano particles. SU8, Polydimethylsiloxane (PDMS) and Methyphenyl Resin SR355 polymer are being used as binder for Silica nanoparticles to stick on glass substrate. Measurements of contact</p>
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Dynamic aspects of adsorbed polymer layers: Evidence of glass-like transitions
… protio and deuterio polystyrene (hPS & dPS), and polydimethylsiloxane (PDMS) in control experiments. The more strongly adsorbing molecules in these experiments were protio and deuterio poly(methyl methacrylate) (hPMMA & dPMMA), and polyisoprene (PI) in control experiments.
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Microassembly via polymeric stamp-based transfer printing
… to complement conventional microfabrication. Polydimethylsiloxane (PDMS) or shape memory polymer (SMP) as “stamp material,” working in conjunction with 3-dimensional positioning stage, provides reliable and precise relocation method of a micro-scale object for device assembly. Theoretical …
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Deposition of colloidal quantum dots by microcontact printing for LED display technology
… previous QD-LEDs'. Through a modification of the polydimethylsiloxane (PDMS) stamp with a parylene-C coating, quantum dots solvated in chloroform were successfully inked and stamped onto various substrates, including different molecular organic layers. The ability to control the placement and the …
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Surface Patterning, Electronic Device Fabrication And, Three-Dimensional Self-Assembly Using Polydimethylsiloxane
… technique is herein described for pattering with polydimethylsiloxane (PDMS). This procedure uses a novel ultraviolet zone (UVO) exposure mask, which allows for the photopatterning of UVO modifications of PDMS surfaces. This modification enables the direct photoinitiated patterning of discrete …
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PROTON BEAM WRITING OF MICRO/NANO FLUIDIC DEVICES FOR DNA ANALYSIS AND PARTICLE SEPARATION
… chemistry and medicine. Polymer materials like polydimethylsiloxane (PDMS) through soft lithography, polymethylmethacrylate (PMMA) are very popular for micro/nanofludic fabrication because of the easy process and low cost. In this thesis, different types of molds (resist, OrmoStamp and nickel …
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Transparent Omniphobic Coatings that are Flexible and Wear Resistant
… coating a low-surface-tension liquid lubricant polydimethylsiloxane. Various organic solvents and water readily and cleanly glide off the final coating, while complex fluids such as ink and paint facilely contract on this surface. These properties are retained after an initially flat coating …
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Development of x-ray luminescence detection system and characterization of x-ray irradiated quantum dots for image-guided x-ray photodynamic therapy
… microscope imaging applications. Additionally, polydimethylsiloxane (PDMS)-based optical phantom with scattering medium was fabricated to reproduce tissue-mimicking optical property in XL computed tomography (XLCT) study.
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Biomimetic cytoskeleton assemblies and living cells on micropillar force sensor arrays
… silicon pillars, (2) epoxy pillars and (3) polydimethylsiloxane (PDMS) pillars. Pillars with diameters of 1 - 5 µm and with a maximum aspect ratio (height : diameter) of 20 : 1 are produced. The pillar heads are selectively functionalised to allow the cultivation of fibroblasts, epithelial …
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Design, Fabrication, and Implementation of a Single-Cell Capture Chamber for a Microfluidic Impedance Sensor
… for single-cell capture and analysis using polydimethylsiloxane (PDMS) channels and a glass substrate to develop a microfluidic single-cell impedance sensor for cell diagnostics. The device was fabricated using photolithography to create a master mold which in turn will use soft lithography …
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Cross-Linked PDMS Expansion Due to Submersion in Liquid and Supercritical CO2
… of micro/nano-copper particles impregnated Polydimethylsiloxane (PDMS) submersed in supercritical carbon dioxide (scCO2) was studied. The purpose of this investigation was to advance micro-corrosion sensor technology utilizing PDMS and micro-metal particle composite as the sensing element …
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Fabrication of microfluidic devices for artificial respiration
We are developing elastomeric polydimethylsiloxane (PDMS) microfluidic devices incorporated with photoactive thin films to create an implantable artificial respiration platform. Whereas state-of-the-art respiration support machines deliver oxygen gas directly to the blood via external macroscale …
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