Browsing Rensselaer Libraries by Author "Ullal, Chaitanya"
Now showing items 1-20 of 31
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A phase field study of the effect of microstructure grain size heterogeneity on grain growth.
Crist, David (Rensselaer Polytechnic Institute, Troy, NY, 2017-08)Recent studies conducted with sharp-interface models suggest a link between the spatial distribution of grain size variance and average grain growth rate. This relationship and its effect on grain growth rate was examined ... -
Construction of moke microscope for magnetic studies of vanadium disulfide flakes
Valdman, Lukas (Rensselaer Polytechnic Institute, Troy, NY, 2020-08)Electron orbiting around its core produces orbital magnetic moment. Each electron also has its own intrinsic angular momentum, that is, spin. The overall magnetic moment is a combination of the orbital and spin magnetic ... -
Controlled crystallization of small molecule organic compounds using polymers
Kangovi, Gagan N. (Rensselaer Polytechnic Institute, Troy, NY, 2019-05)Crystallization of organic compounds is of great industrial and academic importance. It affects many properties of functional materials such as the dissolution kinetics, self-assembly, purity, and electronic and optical ... -
Controlled degradation of bioresorbable polymers via external stimuli
Ehlers, Andrew (Rensselaer Polytechnic Institute, Troy, NY, 2016-12)Weight loss measurements proved to be the most effective method of tracking the extent of degradation in PCL films. Differential Scanning Calorimetry and Raman Spectroscopy proved to be inefficient in tracking or characterizing ... -
Controlling electrical and thermal transport across metal-thermoelectric interfaces through chemical modification with a nanomolecular layer
Cardinal, Thomas (Rensselaer Polytechnic Institute, Troy, NY, 2016-12)Achieving high-efficiency thermoelectric devices for novel energy conversion applications such as on-chip cooling and refrigeration or waste-heat harvesting requires metal-thermoelectric interfaces with tailored electrical ... -
Controlling the properties and degradation kinetics of polyprodrug films
Falcone, Phillip (Rensselaer Polytechnic Institute, Troy, NY, 2020-05)The intent of this project is to characterize the properties and the kinetics of release of polyprodrugs made from estradiol and curcumin to develop biomaterials to be used with neuroprotective applications. For both ... -
Damage accumulation and failure in stochastic fibrous materials
Deogekar, Sai (Rensselaer Polytechnic Institute, Troy, NY, 2019-12)Damage accumulation and failure in random fiber networks is of importance in a variety of applications, from design of synthetic materials, such as paper and non-wovens, to accidental tearing of biological tissues. In this ... -
Designer DNA-based materials for DNA and virus sensing
Chauhan, Neha (Rensselaer Polytechnic Institute, Troy, NY, 2021-08)Over the past few decades, the use of DNA has expanded from its well-known role as a carrier of genetic information to being exploited as a nanomaterial in its own right. Central to this exciting development is the ... -
Dielectric permittivity of interfaces in polymer nanocomposites from electrostatic force microscopy
Gupta, Praveen Kumar (Rensselaer Polytechnic Institute, Troy, NY, 2022-05)The addition of nanofillers can lead to a significant change in the dielectric properties of polymer nanocomposites. The cause for the change has been identified as the presence of an interfacial layer of polymer surrounding ... -
Dielectric property enhancement in polymer composites with engineered interfaces
Krentz, Timothy Michael (Rensselaer Polytechnic Institute, Troy, NY, 2016-05)Progressive variation in dispersion quality is attained with this surface modification scheme. This creates progressively smaller volumes of matrix polymer unaffected by the filler. This work shows that when these volumes ... -
Electron scattering at surfaces and interfaces of transition metals
Zheng, Pengyuan (Rensselaer Polytechnic Institute, Troy, NY, 2015-12)Finally, a transport model for thin films with anisotropic Fermi surfaces is presented, which includes the effect of electron surface scattering. Simulations done using the calculated W Fermi surface show the resistivity ... -
Electronic transport in CrN and related alloys
McGahay, Mary (Rensselaer Polytechnic Institute, Troy, NY, 2020-12)A possible metal-insulator transition in the Cr1-xAlxN alloy system was explored using electronic transport and optical measurements on epitaxial Cr1-xAlxN(001)/MgO(001) layers which form a cubic solid-solution rock salt ... -
Epitaxy and characterization of cubic GaN and Ga₁₋ₓInₓN on micropatterned Si (001)
Durniak, Mark T. (Rensselaer Polytechnic Institute, Troy, NY, 2016-08)A reduction in the size of unwanted polycrystalline GaN grains was achieved by growth at high nitrogen to gallium (V/III) ratios without affecting cubic GaN nucleation. Grain sizes decreased from 0.5 to 0.02 µm² as the ... -
Fatigue and fracture in polymer networks and their composites
Kamble, Mithil (Rensselaer Polytechnic Institute, Troy, NY, 2022-05)Fatigue is encountered in wide spectrum applications varying from biomaterials to energy storage devices. As we explore novel materials to meet stringent performance demands of new applications, strategies to tackle fatigue ... -
Manipulating electronic and mechanical properties at metal-ceramic interfaces with a nanomolecular layer
Kwan, Matthew P. (Rensselaer Polytechnic Institute, Troy, NY, 2017-08)This work demonstrates that inserting nanomolecular layers (NMLs) can profoundly change and/or lead to novel electronic and mechanical properties of metal-ceramic interfaces. The first set of results demonstrate that ... -
Micelles and nanoparticles : a novel approach to photonic crystal synthesis
Pressly, James (Rensselaer Polytechnic Institute, Troy, NY, 2014-05)Photonic crystals are an interesting class of materials that hold much promise for future lighting designs. The unique structure of a photonic crystal, a periodic array of high and low dielectric material, creates optical ... -
Modifying the platinum-hafnia and copper-hafnia interface using an organophosphonate nanolayer
Clement, Alexander Joel (Rensselaer Polytechnic Institute, Troy, NY, 2015-12)This study demonstrates the ability of organophosphonate nanomolecular layers (NMLs) to modify the interfacial fracture toughness of the Pt/HfO2 and Cu/HfO2 interfaces. In the cases of the Pt/HfO2 interfaces the inclusion ... -
Molecular structure induced aggregation effects on the photophysical properties of perylene diimide based multilayer thin films
Hu, Guangyu (Rensselaer Polytechnic Institute, Troy, NY, 2019-05)Two perylene diimides (PDI) were synthesized to enable the preparation of multilayer films through a layer-by-layer (LbL) assembly technique using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). Multilayer films ... -
Multiscale dynamics in complex materials and interfaces
Habib, Adela (Rensselaer Polytechnic Institute, Troy, NY, 2021-08)Material response to light irradiation is at the heart of a wide range of emergent technologies that are in the nano- to quantum length scale. These technologies include interferencenanolithography, optoelectronics, and ... -
Novel high refractive index, thermally conductive additives for high brightness white LEDs
Hutchison, Richard Stephen (Rensselaer Polytechnic Institute, Troy, NY, 2015-08)These experiments were originally conducted on the commercially available methylated Sylgard 184 silicone and then again on a higher refractive index methyl-phenyl silicone from Momentive. While some of the results from ...