M.Eng. Students

Learn more about the current work being done by the Master of Engineering Students

 

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Ashkar headshot

Karl Ashkar

Abstract:

Metalenses are thin, flat, optical components that use nanostructures to focus light. Metalenses essentially are types of lenses that can perform the abilities of a traditional glass lens, plus more, and are millions of times smaller. As modern-day electronics become increasingly smaller, the need for smaller and more efficient sensors in various optical components (phones, cameras, or telescope lenses) become increasingly more valuable. Metalenses have the potential to revolutionize the technology industry by replacing traditional optical lenses and sensors, however much research needs to be done for a successful fabrication process of these types of lenses. 

Sponsor: https://ams.com/

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Chen headshot

Andra Chen

Abstract:

To study the thermal degradation mechanism of GaIn alloys, I plan to carry out literature search, to look into computational resources for thermodynamics calculations, to familiarize myself with gallium liquid metal and indium preform samples, and to perform materials characterization and thermal conductivity measurements (if feasible) on those samples.

  1. Perform literature and citation search on liquid metal TIMs, GaIn alloys, effects of alloying on GaIn alloys, oxidation of gallium during thermal cycling, and look for existing liquid metal thermal conductivity tests.

  2. Characterize gallium liquid metal and indium preform samples using cryo-electron microscopy (cryo-EM) (and possibly Raman spectroscopy) at Cornell Center for Materials Research (CCMR). Then use energy-dispersive X-ray (EDX) to do elemental analysis.

  3. Examine appropriate instruments/tools for metalizing material on glass slides. Determine appropriate thickness of the material depositing on the glass slide.

  4. Develop (reliable) testing methods that simulate actual packaging conditions to see how liquid gallium and indium preform samples respond to thermal cycling.

Sponsors: http://www.uic.com/https://www.indium.com/

Universal-Instruments-500x163.jpg   indium.png


 

Xuanyi Ding headshot

Xuanyi Ding

Characterization of Pressure-Less Silver Sintering Joint

Deliverables: 

  • Paper reviews related to the field
  • Silver sintering materials under different conditions
  • Mechanical testing on these materials
  • Reliability tests including power cycling and temperature cycling test

Abstract:

It has been found that the silver sintering joints prepared under pressure-less sintering condition outperform the high lead solder and lead-free solders materials in terms of thermal cycling test. Understanding the reliability of pressure-less sintering materials is essential to improve the high temperature working condition materials such as hybrid cars and aircraft. Literature research will be conducted for a better understanding of silver sintering materials and the reliability tests. After understanding the theory behind the silver sintering and the test, the project will focus on the characterization of the silver sintering materials at different conditions. There are couple parameters that related to the quality of the sintering materials such as joint bondline thickness, temperature, voids and porosity, which is important for the manufacture. Moreover, the project will conduct power cycling test and temperature cycling test. At last, a table related to both properties and sintering conditions will be plot after these experiments for future reference.

Sponsor

   indium.pngUniversal-Instruments-500x163.jpg


 

Yiming Dong head shot

Yiming Dong

Ultrasound transducer materials for biomedical flowsensors with a higher linearity than the PZT

Abstract: 

This project is to investigate potential piezoelectric materials to incorporate into Transonic flowprobes as low power resonant devices. The first semester work would focus on (a) researching the currently available breadth of transducers that would fit within Transonic technology and comparing key characteristics of the materials in terms of suitability for intended applications; and (b) identification of new materials that are being developed for similar applications and the potential impact for incorporation into Transonic devices.  The second semester would use the information gathered from the previous months to procure sample materials and characterize their response.  If suitable materials are available, full device production would be an ideal capstone to the 2 semester work. Use of piezoelectric modelling software may be used during evaluation.

Sponsors:

Professor Debdeep Jena
Prof. Debdeep Jena
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Ford headshot

Colin Ford

Abstract:

Microencapsulation can provide a way to store volatile compounds in a stable way while allowing their release at the appropriate time. Many of the encapsulation techniques use chemicals such as formaldehyde which cause them not to be suitable for microencapsulation applications in the food and drug industry. The purpose of this project is to develop a method for microencapsulation using the material eggshells are made of, calcium carbonate, as it is very biocompatible and will allow industries in the food and drug markets to use microencapsulation.

Sponsor: http://csicaps.com/

 


 

Han headshot

Lu Han

Abstract:

Overviewing the smart phone market, almost every manufacturer is trying to further reduce the thickness of their product. Thus, there is a huge commercial demand on thinner and smaller phone components currently. For the needs of slimmer and higher quality optical sensor, metalens, a flat and thin optical component for replacing bulky and curved lens, has been investigated for a few years. This project is mainly focus on developing current metalens to enable it to focus the entire spectrum of visible light in the same spot and at the same time with high resolution.

Sponsor: https://ams.com/

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Huang headshot

Han Huang

Abstract:

The coupling between various degrees of freedom (spin, charge, lattice, and orbital) is an important paradigm in condensed matter physics and materials science. Specifically, this project studies spin-phonon coupling (SPC). This is a very new field that very few research has been conducted until recent years, yet it receives increasing interest in the context of multiferroic materials and spintronics.

Sponsor: Professor Zhiting Tian

Zhiting Tian headshot


 

Jiang headshot

Hua Jiang

Abstract:

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.

Sponsor: http://rheonix.com/

 

 


 

Khuteta headshot

Siddharth Khuteta

Abstract:

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.

Sponsor: https://xallent.com/

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Kumar V headshot

Praveen Kumar V

Abstract:

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

Dshemuchadse headshot


 

Chang Liu head shot

Chang Liu

Optimizing Micro Fiber and 3-D Printing Nozzle for Better Mechanical Strength in Cement

Deliverables: 

  • Natural fibers will be tested for their tensile properties and interfacial shear stress (IFSS) with cement.
  • Simple method of measuring IFSS
  • Find effect of fiber loading on properties of cement
  • Effect of nozzle design on cement 3-D printing.

Abstract:

Cement has been used in human civilization for thousands of years. It has good mechanical properties in compression but performs horrible in tension. We have used asbestos fiber, steel, polypropylene, and glass fiber to improve the properties of cement in tension. This project focuses on improving the properties by adding natural fiber such as hemp, jute, and ramie. Natural fibers are abundant in quantity, less expensive, lighter, biodegradable. They also consume less energy in production compare to traditional fiber/steel. This project will find out the optimum fiber in micrometer size to fit in cement and could provide the largest improvement on mechanical properties of cement. Also, this project will also modify the nozzle of 3-D printer to have a more aligned orientation of fiber in loading direction.

Sponsor: Netravali Research Group

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Yuhan Ma Head shot

Yuhan Ma 

Abstract: 

Solder materials have been used for PCB assembly for a few decades. Tons of different electronic components are soldered on the PCB to build an electronic device, like the computer motherboard or a mobile phone. Reliability of the solder joint will significantly impact the sustainability of the electronics, which are commonly built through the solder reflow process. The testing vehicles for solder reliability characterization have to be same or similar to the real PCB assembly from the electronics. The proposed project is focusing on designing the PCB testing boards, which will be reflowed to form the PCB assembly after placing the components and tested in the accelerated condition.

Sponsor: 

indium.pnghttp://www.appliedmaterials.com/sites/all/themes/appliedmaterials_clean/images/AMATlogo.jpg


 

Prager headshot

Ryan Prager

Abstract:

This project is a collaborative work between Cornell University and AMS AG for the prototyping and testing of improved diffractive optical elements (DOEs) to be used in the next generation of optical sensors.  Improved optical sensor performance is directly correlated to the increase in light diffractive feature density on DOE.  As feature density increases, the fabrication precision for such features much also improve drastically.  The capabilities provided by Cornell University’s facilities will improve AMS AG’s abilities to develop and characterize these next generation sensor components in preparation for mass production.

Sponsor: https://ams.com/

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Qi headshot

Enze Qi

Abstract:

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

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Sang headshot

Tian Sang

Abstract:

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.

Sponsor: https://www.siemens-healthineers.com/en-us/

 

 


 

Sirui Tan Head shot

Sirui Tan

Abstract: 

Nowadays, nanoscale characteristic phenomena have become important with the advancement of research fields into the nano-world. The Scanning Electron Microscope (SEM) is one of the most useful tools used in research to obtain the nano-structure of samples. However, it has some shortcomings such as charge injection into the sample and not being able to detect electronic properties of thin film materials. This project will focus on integrating conductive nanopillars into Xallent nanoprobes for SEM based testing of thin film materials.

Sponsor:

Xallent-Logo.png


 

Thakral headshot

Nitika Thakral

Abstract:

The need to extract electrical properties from thin films and semiconductor materials is growing in modern research. Xallent LLC came up with novel nanoprobing technology to assist in such measurements. They are solving customer issues by switching the composition of their four-point probes from tungsten to platinum, enabling it to be more durable and corrosion resistant.

Sponsor: https://xallent.com/

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Tsai headshot

Yu-Han (Joseph) Tsai

Abstract:

Synthesis of Group III and V Doped Hierarchical Porous Carbon (HPC) as Cathode Materials for Fuel Cell Applications

With the development of electric cars and portable electronic devices, needs of high energy transformation efficiency and high energy storage batteries are dramatically increasing. Owing to several issues regarding currently commercialized lithium-ion batteries, scientists and researchers have invested vast number of resources to investigate on new lithium-based batteries. Among the several top research areas of lithium-based batteries, lithium-sulfur batteries have gained strong attentions to be the next product that can potentially strike the market in the foreseen future. Our ultimate goal is to resolve challenges regarding commercial application of this next-generation battery.

Sponsor: Prof. Emmanuel P. Giannelis

Giannelis headshot


 

Shengqi Wang head shot

Shengqi Wang

Discovery of altered structure-property relationships in the organic and inorganic constituents of type 2 diabetic bone

Abstract:

Bone in patients with type 2 diabetes faces a higher risk of fracture. Because there are many differences in the composition of bone from patients with type 2 diabetes compared to healthy bone, collecting and analyzing Fourier transform infrared and spectrum data can help us to determine the difference, identify what cause a higher fracture rate. Moreover, we will also design and implement machine learning algorithms to distinguish bone types based on their data.

Sponsor: 

Eve Donnelly Head Shot
Prof. Eve Donnelly


 

Wang headshot

Yirou Wang

Abstract:

Characterization of Anti-Stiction Film as a Predictive Means of MEMS Accelerometer Performance and Reliability

Kionix produces inertial MEMS (Micro-Electro-Mechanical-Systems) sensors that are designed to react to and measure acceleration. The MEMS structures have critical dimensions on the order of 1-2um. At these small dimensions, electro-static forces can interfere with proper device function.

Sponsor: https://www.kionix.com/

 

 


 

Yujia Wang head shot

Yujia Wang

Microstructural Morphologies and Porosity of Sintered Ag with FIB Process

Deliverables: 

  • Preparation of the cross-section samples of Ag sintered joints with FIB techniques
  • Morphologies and porosity of Ag sintered joints.
  • Effect of sintering process on the porosity of Ag sintered joints.

Abstract:

The focus of this project is to investigate the microstructural morphologies of the Ag sintered joints, which has been considered as alternative die attach materials to the soldered joints. The major advantages of silver sintered joints are low process temperature, high thermal and electrical conductivity, as well as high melting temperature, which enable Ag sintered joints’ long-term reliability in the use of electronic devices with high power density and/or have a high operating temperature. However, coefficients of thermal expansion (CTE) mismatch of the silver sintered joints, chips and substrates will negatively affect the devices life cycle. Various strategies for alleviating the CTE mismatch have been investigated. To optimize those strategies, we need to fully understand the effect of sintering process conditions on porosity and morphologies of sintered Ag joints.

In this project, focused ion beams (FIB) technique will be used to fabricate samples at micro-scale. SEM will be performed before and after the thermal-mechanical testing. Data of the cross-sectional microstructural morphologies and porosity of the samples will be collected and analyzed. Correlation between the sintering process and Ag sintered joints’ porosity will be built.

Sponsor


indium.pngUniversal-Instruments-500x163.jpg


 

Yunan Wu head shot

Yunan Wu

Testing PCB Board Design

Abstract: 

Solder materials have been used for PCB assembly for a few decades. Tons of different electronic components are soldered on the PCB to build an electronic device, like the computer motherboard or a mobile phone. Reliability of the solder joint will significantly impact the sustainability of the electronics, which are commonly built through the solder reflow process. The testing vehicles for solder reliability characterization have to be same or similar to the real PCB assembly from the electronics. The proposed project is focusing on designing the PCB testing boards, which will be reflowed to form the PCB assembly after placing the components and tested in the accelerated condition.

Sponsor: 

indium.pngsubsidiary -- SARTOMER - Americas


 

Wu headshot

Zixuan Wu

Abstract:

Management and design for the manufacture of the compostable cartridge

Cooperate with the design project--how it will have a filter on the back to prevent liquid from flowing through and how to use some type of mechanism to close the cartridge, to make a new design of the cartridge. Then look for a company that has a small run manufacturing / prototype manufacturing line.

Sponsor: https://www.curbicus.com/

 

 


 

Zhuyun Xie Head Shot

Zhuyun Xie

MSE M.Eng. students can do an internship with a range of companies from small businesses to Fortune 500 companies.  Sartomer is the premier global supplier of acrylate and methacrylate monomers and oligomers used in ultraviolet curable, electron beam curable, and peroxide curable inks, coatings and adhesives.

subsidiary -- SARTOMER - Americas

 


 

Zixuan Xu photo

Zixuan (Shane) Xu

Abstract:

Investigation on the Influence of Sintering Conditions on Ag joints' Microstructure for Die Attach

This research project characterized pressurelessly sintered Ag joints using Scanning Electron Microscopy (SEM). The cross-sectional features (e.g. porosity, cracking positions) were investigated in secondary electrons (SE) imaging mode. Energy dispersive X-Ray spectroscopy (EDS) was applied for element analysis which indicated a unique oxidation layer appeared in air sintering environment. The findings of microscopic features were linked with the macroscopic mechanical and thermal mechanical properties, which helped to better control the sintering condition regarding different properties of the final product fit for various demanding applications.

Sponsor: https://www.indium.com/

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Yao headshot

Ziyue Yao

Abstract:

The focus of the lab is characterization of microstructure and mechanical properties of skeletal tissues across multiple length scales, with a primary focus on bone and a secondary focus on tendon. Both tissues have complex collagen-based hierarchical microstructures, in which changes at the microstructural level affect properties at larger length scales.

Sponsor: Professor Eve Donnelly

Eve Donnelly Head Shot
Prof. Eve Donnelly


 

Yu headshot

Alex Yu

Abstract:

Xallent LLC develops both software and hardware tools needed in order to image, test, and analyze nanoscale electronic devices and thin films using nanoprobe systems. The current probe systems available on the market require a tedious amount of manpower, setup time, and maintenance, and cannot keep up with the expanding demand for semiconductor device production. This project will focus on attempting to incorporate a larger area of probe testing that expands upon the current four point probe setup.

Sponsor: https://xallent.com/

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Yu, Raymond

Raymond Yu

Abstract:

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.

Sponsor: https://xallent.com/

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Yu, Wenchao

Wenchao Yu

Abstract:

Development of Sample Preparation Technologies for Single-Particle Cryoelectron Microscopy of Biomolecular Systems

Single-particle cryoelectron microscopy is a revolutionary technology while the sample preparation is facing many difficulties. By simulation and experimental practice, we will better understand the causes of image degradation and provide a better preparation procedure which can promote the imaging performance.

Sponsors: https://www.mitegen.com/ & Prof. Robert Thorne

Thorn Headshot


 

Zhai headshot

Jinsong Zhai

Abstract:

Bio-fiber Composites Development

The use of hemp fibers in composites can be a solution of biodegradable, sustainable, and recyclable materials. The Agriculture Improvement Act of 2018 uprooted hemp from the controlled substances list, providing the basis for the industrial use of hemp fibers in US. Hemp fibers can be found in the newly-legalized plant, Cannabis sativa L, which makes them strong and stiff. Hemp fiber reinforced composites gain advantages in terms of performance, price, availability, and environmental impact. This project is to develop a hemp fiber reinforced composite for application to non-structural automotive applications.

Sponsor: Light Green Machines, Steven Fleishman

 

 


 

Zhang, Hui headshot

Hui Zhang

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.

Sponsor: https://ams.com/

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Zhang, Xinyu

Xinyu Zhang

Abstract:

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. 

Sponsor: https://ams.com/

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