Development of Adapted Van der Pauw Method for Characterizing Electrical Properties of 5G and 6G Materials
This project researches the possible methodologies usable in characterizing the properties of novel materials used in 5G devices, focusing on the electrical properties such as resistivity. Based on research, the primary aim is developing an adapted version of the van der Pauw method that can be applied to most 5G-related material samples. Mr. Chen will adopt both literature research and physical experiments to finalize a deliverable methodology.
Investigation of Solid – Liquid Hybrid (SLH) GaIn Thermal Interface Material (TIM)
Thermal interface materials (TIMs) are used in electronic devices to enhance the thermal conductivity of heat generated between their heat sink or dissipating component and their heat producing component for cooling high performance. Liquid metal TIMs exhibit large surface tension, low viscosity, and excellent wetting properties. Although the mechanical properties of liquid metal TIMs are very promising, they are also affected by oxidation when exposed to air. Other challenges with liquid metals as a TIM include dispensability and containment to minimize spread for electric conductivity. The low melting point of gallium based liquid metals has shown to be a desired candidate for electrical and thermal current conducting. Ms. Hernandez Master of Engineering (MEng) project will focus on mitigating the cause of thermal degradation and oxidation of solid and liquid hybrid thermal interface materials (SLH TIM) and proposing a solution to improve thermal performance.
A fully automated and integrated molecular testing device can deliver meaningful multiplexing capability at an affordable price. The Encompass family of workstations, the Encompass MDx® and Encompass Optimum™, provides a one-stop solution, from sample application to result, for molecular testing needs today and in the future.
In a memristor, a semiconducting oxide is sandwiched between two metal electrodes. The oxide layer has a concentration gradient of oxygen atoms or in other words, there are oxygen vacancies present on one side of the layer. As a result, when a voltage is applied these oxygen vacancies tend to drift towards one of the electrodes based on the polarity. This causes a change in the resistance, leading to shunting of the device and overcoming the electronic barrier to the charge flow. Given the size of these devices, studying their performance characteristics puts forth a major challenge. Understanding and controlling the behavior of a memristor is still an undergoing process. This project will focus on studying the behavior and working of these devices.
MSE 5070 - Interdisciplinary Design Concepts
Vergason Technology, Inc (VTI) has developed a Physical Vapor Deposition (PVD) coating stack that replaces electroplated chrome on plastic. The resulting product is a system with a plastic substrate with thickness in nanometer, a paint layer with thickness in microns, and a ceramic/metal PVD stack with thickness in nanometers, and a thin layer of graded composition between the ceramic and metal PVD layers.
Sponsors: https://vergason.com/ & Prof. Shefford P. Baker
Abstract: Research and Characterization of Bioresins and Biofibers
There are a multitude of synthetic and terminal use materials used in industry and its products. One such industry of note is the automobile industry, including but not limited to commercial vehicles. Many of the materials in vehicles are non-reclaimable and are synthetic so they are not as sustainable or biodegradable. Light Green Machines Inc. aims to help remedy this problem by creating a naturally sourced vehicle, that is also potentially recyclable. There are a few hurdles in the process, however, one of which being that the United States are lacking in naturally sourced materials. A great majority of materials are synthetically produced because they are easy to replicate with consistent properties, as well as being cheaper to produce due to the existing infrastructure. This project is working to find naturally sourced, biodegradable materials to be used for some interior components of a bus. The specific scope of this project is focusing more on bioresins that can be used in conjunction with biofibers to get the desired materials with the desired characteristics.
Sponsor: Light Green Machines
Abstract: Using Grayscale Photolithography to Optimize Photonic Microlenses
Optoelectronics, or optronics for short, is a branch of electronics centered around the intake and use of light. Specifically, this project for AMS concerns sensors that transfer incoming light to charge coupled device (CCD) capacitors, which in turn convert the arriving photons into electricity that is used to power other parts of the circuit containing the CCD. To receive maximum electrical output, it is desirable to have as many photons hitting the optical sensors’ surfaces as possible. In standard configurations, with sensors in a grid-like pattern and barriers separating individuals, light that hits the borders is reflected and cannot be used for electrical power. One solution is to insert a microlens over the photosensor (in this case synonymous with photodiode), which refracts some portion of the light intended for the boundary back toward the sensor. This increases the fill factor, or the ratio of the area of the board which can refract light to a sensor, versus the overall area of the board. For this project Mr. Riley will be developing and optimizing fabrication methods for microlenses, to increase light input contacting the photosensors.
Laboratory analyzers systems are designed by Siemens Healthineers, which helps to provide a precise early diagnosis and informing treatment strategies with aftercare to improve human health. This type of analyzer provides a greater efficiency to meet the clinical and operational challenges. The innovation of the automatic inspection is needed for the improvement of the laboratory analyzer and its maintenance.
Abstract: Characterization of Silica Aerogels to Optimize Manufacturing Process
In the window industry, there is a division between energy efficiency and cost effectiveness. AeroShield is bridging that gap through the introduction of high-clarity, super-insulating silica aerogels. These silica aerogel window inserts allow for the customer to experience a higher thermal insulation and energy conservation, all while the product remains cost competitive. As the company progresses towards large scale production, the manufacturing process needs to be fine-tuned to increase yield and avoid material shrinkage. As the manufacturing process transforms, characterization must be done in accordance with those changes. Ms. Scira Master of Engineering (MEng) project will focus in varying important parameters in order to determine the changes in the nanostructure and the thermal/optical properties of the different samples. The changes to the wet-gel fabrication process are occurring during the critical point drying step. The characterization will be broken into three major categories: reference, hydrophobicity, and preshrink. Following the characterization stages are two analysis and results stages: the analysis and presentation phase, and the report and output phase.
A long standing goal in the field of Materials Science is the creation of complex self-assembling structures from simple components. Programmable self-assembly is conventionally done by encoding complex rules for assembly in enthalpic interactions. This project aims to explore the self-assembly phase behavior of magnetic materials from a limited number of simple building blocks.
Sponsor: Professor Julia Dshemuchadse
Abstract: Analysis, Bonding and Cutting of Porous Silicon for Implantable Microchip Sensors
FloraPulse's revolutionary agricultural sensors help growers improve crop yield, quality and water use efficiency by directly measuring plant moisture status through implanted MEMS microchips. However, clogging of the sensor's porous silicon membrane during the chip fabrication process leads to reduced yields. This project aims to process and analyze porous membranes to find out why they are clogged and how to repair them to improve microchip yield. Porous silicon wafers sent by FloraPulse will be processed in CNF for anodic wafer bonding and wafer dicing, and then analyzed using optical microscopy and scanning electron microscopy (SEM).
Abstract: Development of Metalenses for Optical Sensors: A Benchmark Fabrication Process
Metasurfaces have been extensively studied for their unique functionalities that can be applied to optical systems. Metalens, a metasurface-based optical component, contains nanostructures inside that can focus light and shows excellent characteristics such as ultra-thinness and cost-effectiveness. As the demand for slimmer optical component is rising, metalens are very promising for miniaturized optical systems in phones, cameras, telescopes, etc. The aim for this project is to address the needs by developing processes for metalens fabrication using EBL, nanoimprint, RIE, etc. Characterizations will be done using AFM, SEM, and FIB
Efficient and precise measurements on the electric properties of materials is essential for the electronics and semiconductor fabrication industry. Xallent LLC has developed a novel nanoprobe technology to provide fast and non-destructive characterization of semiconductor devices and thin film materials. However, the properties of the probes are affecting the precision of the measurements. We plan to perform IV and CV measurements on different materials in order to calibrate the probes. Furthermore, Xallent has proposed using the nanoprobes as a localized transistor to test the field effect transitions of thin film materials in FET devices. This will involve in re-calibration of the probes and adjustments to the software.
Abstract: Development of diffractive optical element of optical sensors
Diffractive optical elements (DOEs) are generally used in laser beam shaping and it has many applications in material processing, sensing. DOEs utilize a surface contains complex microstructure for its optical function. The surface relief profile with micro-structured has two or more surface levels. In this project, it aims to smaller sizes of DOEs to nanometer scales and to make them achieve the better performance. Several semiconductor fabrication processes are used to smaller the size of DOEs and the performance of DOEs can be tested by AFM, SEM, FIB.
Microlenses are widely used in miniaturized optical systems for light manipulations. For example, microlens arrays can be integrated with CCD sensors to concentrate light to photosensitive areas rather than losing light in non-photosensitive areas. The small sizes of the microlenses allow for reduced form factor of optical devices. This project aims to tackle this challenge by developing processes for microlens profile control using photo lithography, RIE, etc. Characterizations will be done using AFM, SEM, FIB, etc.
Abstract: Study of the Physics of Particle Impact and Solidification during Direct Energy Deposition Additive Manufacturing
The focus of this project is on the study of metal powder flow properties and their interaction with the laser energy at the melt pool within Direct Energy Deposition (DED) Additive Manufacturing. DED is a powerful method of 3D printing metal powders via an inert carrier gas with the use of a laser that has a wide range of applications due to the ability to print a variety of metals and alloys. However, the stochastic nature of metal powder affects the melt pool on the substrate, which affects the overall print product. These interactions lead to inefficient printing processes. Studying the metal powder flow properties and their interaction with the laser and melt pool will help improve the DED process. Initial work focuses on experiments studying the isolated powder flow interactions with the goal of observing their impact velocity and residence time when they are ejected on to the substrate. This is followed by experiments studying the powder flow interaction with the melt pool at various powder feed parameters and laser process parameters.
Sponsor: Prof. Atieh Moridi