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Full-Text Articles in Physics

Novel Data Analysis Methods In Multi-Channel And Multi-State Binding Experiments, Joseph Tibbs, Elizabeth Boehm, Wayne Bowie, Todd Washington, Maria Spies, Ali Tabei Apr 2019

Novel Data Analysis Methods In Multi-Channel And Multi-State Binding Experiments, Joseph Tibbs, Elizabeth Boehm, Wayne Bowie, Todd Washington, Maria Spies, Ali Tabei

Research in the Capitol

Single-Molecule studies use advanced microscopy techniques to view biomolecules, such as proteins and DNA, individually. On a slide, fluorescently-labeled molecules are immobilized and imaged using lasers, and the patterns of fluorescence can give important information about the interactions of multiple molecules. To extract this information, advanced, customizable data analysis tools must be created. The first goal is to create a method to robustly normalize (correct for brightness) single-channel fluorescence data. The second goal is to extend pattern recognition of binding order to multi-state and multi-channel binding patterns. The KERA 3.0 suite links creative pattern-recognition and normalization techniques with the abilities …


Influence Of Sonication Parameters On The Morphology Of Nanocellulose Aerogels, Dexter Cox, Tim Kidd Apr 2019

Influence Of Sonication Parameters On The Morphology Of Nanocellulose Aerogels, Dexter Cox, Tim Kidd

Research in the Capitol

Nanocellulose is a renewable and biocompatible material that has a tensile strength similar to aluminum, is stiffer than Kevlar, and has a strength to weight ratio eight times that of stainless steel. There has been a range of studies on nanocellulose materials for potential use as a low-calorie food substitute, biomedical wound dressings, and as a structural component for buildings. Throughout this research experiment, nanocellulose aerogels of different mass compositions were created through a mechanical process using an ultrasonic processor with a titanium probe attachment. The purpose of this study was to develop a method that reduces the amount titanium …


First Principles Study Of Surface States And Tetragonal Distortion In Half Metals, Sam Prophet, Rishabh Dalal, Parashu Kharel, Pavel Lukashev Apr 2019

First Principles Study Of Surface States And Tetragonal Distortion In Half Metals, Sam Prophet, Rishabh Dalal, Parashu Kharel, Pavel Lukashev

Research in the Capitol

Magnetic materials have been an increasingly popular area of research over the past decade. Half-metallic materials, in particular, are of specific interest due to their high degree of spin-polarization. One application of these materials that is of interest is spintronics. Electronics utilize the electric charge of electrons, while spintronics utilizes the spin of these electrons instead. Half-metals are very promising for this application, as they generally hold their magnetic properties up to high temperatures, and are relatively cheap compared to other metals. The following research has two goals for two different half metals. Firstly, identify the so called ‘surface properties’ …


Effect Of Fe Substitution On Structural, Magnetic And Electron-Transport Properties Of Half-Metallic Co2tisi, Juliana Herran, Parashu Kharel, Pavel Lukashev Apr 2018

Effect Of Fe Substitution On Structural, Magnetic And Electron-Transport Properties Of Half-Metallic Co2tisi, Juliana Herran, Parashu Kharel, Pavel Lukashev

Research in the Capitol

In recent years, research on magnetic materials has been one of the most technologically appealing developments in materials science. Among other applications, magnetic materials are essential components of data storage and information processing in computer hardware elements, such as hard drives and random access memories. Here, we present a theoretical study of structural, magnetic and electronic properties of ferrimagnetic Co2Ti1−xFexSi (x = 0, 0.25, 0.5), using density functional calculations. We show that the magnetic moment of Co2Ti1−xFexSi increases when Ti is substituted with Fe, consistent with experimental findings. …


Tio2 Coating Method For Nanocellulose Aerogel, Byron Fritch, Tim Kidd Mar 2017

Tio2 Coating Method For Nanocellulose Aerogel, Byron Fritch, Tim Kidd

Research in the Capitol

Titanium dioxide has been shown to be an effective catalyst for splitting water into hydrogen and oxygen gas. By increasing the surface area of the titanium dioxide catalyst, the rate of water splitting may increase. A possible method to increase the splitting of water uses a high surface area composite material formed by coating nanocellulose aerogels with titanium dioxide. Different coating methods were studied using titanium isopropoxide as the titanium dioxide source to create such composites. It was found that the most consistent titanium dioxide coatings were formed during a 12 hour titanium isopropoxide vapor bath. Other coating methods collapsed …


Effect Of Structural Disorder On Magnetic Properties Of Mncrval, Juliana Herran, Rishabh Dalal, Paul Gray, Pavel Lukashev Mar 2017

Effect Of Structural Disorder On Magnetic Properties Of Mncrval, Juliana Herran, Rishabh Dalal, Paul Gray, Pavel Lukashev

Research in the Capitol

Operation of virtually any modern electronic device relies on magnetic materials. In particular, these materials are the cornerstone of data storage and processing in computer hardware elements, such as hard drives and random access memories. Here, we theoretically study an interplay between structural and magnetic properties of MnCrVAl, a material which recently attracted significant attention due to its rather exotic electronic structure. In particular, this material behaves either as an insulator or as a metal, depending on which “spin” (an intrinsic property of any fundamental particle) of the electron is considered. Using advanced computer simulation techniques (density functional calculations on …