Katherine S. Ziemer

Polar oxide/semiconductor heterojunction: MgO (111)/SiC (0001)

Julio A. do Nascimento, Daniel Pingstone, Adam Kerrigan, Kenta Yoshida et autres

The layered structures of polar oxides (i.e., metal/oxygen/metal/oxygen/…) can be utilized to engineer the atomic structures and thus tailor the electronic properties of polar oxide/semiconductor interfaces, including the band offsets between the technologically important MgO and SiC for complementary metal–oxide–semiconductor and spintronic …

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4 Schools For Women In Engineering Innovative Approaches To Increase Middle School Students' Interest In Stem

Peter Wong, Stephanie Blaisdell, Paula G. Leventman, Anna K. Swan et autres

Tufts) -are collaborating to introduce engineering to middle schools.Models are being developed to demonstrate concepts that encourage girls and boys to explore STEM (science, technology, engineering and math).Each primarily female team includes engineering faculty, middle school teachers, industry volunteers, and undergraduate students.Teams …

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Stem Teams And The Great Orange Squeeze: A Unique Approach To Preparing Middle School Educators For The Massachusetts Engineering Framework Requirements

Tracy Carter, Paula G. Leventman, Katherine S. Ziemer

Massachusetts was the first state in the nation to introduce engineering as part of the K-12 education frameworks.In the middle schools, the engineering framework is tested as part of the compulsory Massachusetts Comprehensive Assessment System (MCAS) exam.The engineering framework requirement provides an …

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Combustion synthesis of N-doped three-dimensional graphene networks using graphene oxide–nitrocellulose composites

Xin Zhang, Katherine S. Ziemer, Brandon L. Weeks

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High-yield large scale laser patterning of magnetic nanoparticles

Wenjun Zheng, Ping Li, Zhiqiang Wang, Negar H. Golshan et autres

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Soft Magnetism, Magnetostriction, and Microwave Properties of Fe-Ga-C Alloy Films

Xianfeng Liang, Cunzheng Dong, Sue Celestin, Xinjun Wang et autres

A systematic investigation of the soft magnetism, the change of modulus of elasticity with magnetization (ΔE effect), magnetostriction, and microwave properties has been carried out on iron-gallium-carbon thin films over a wide carbon content range. The phase transformation of the Fe-Ga-C films …

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Highly efficient in situ oxidization of metal ions in porous media with high power laser

Wenjun Zheng, Negar H. Golshan, Sue-Jonnathane Celestin, Katherine S. Ziemer et autres

Metal ions in ground are hard to remove and constitute a serious environmental challenge. This paper reports a new laser-based method for in situ soil decontamination at high efficiency, in which a focused CO2 laser is used to oxidize metal contaminants from …

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Bilayer Nanomesh Structures for Transparent Recording and Stimulating Microelectrodes

Yi Qiang, Kyung Jin Seo, Xuanyi Zhao, Pietro Artoni et autres

Abstract Nanomeshed forms of metal have emerged as a promising biocompatible electrode material for future soft bioelectronics. However, metal/electrolyte interfaces are intrinsically capacitive, severely limiting their electrochemical performance, especially for scaled electrodes, which are essential for high‐resolution brain mapping. Here, an innovative …

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Decreased bacterial growth on titanium nanoscale topographies created by ion beam assisted evaporation

Michelle Stolzoff, J. Burns, Arash Aslani, Eric Tobin et autres

Titanium is one of the most widely used materials for orthopedic implants, yet it has exhibited significant complications in the short and long term, largely resulting from poor cell-material interactions. Among these many modes of failure, bacterial infection at the site of …

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Process control model for growth rate of molecular beam epitaxy of MgO (111) nanoscale thin films on 6H-SiC (0001) substrates

Ghulam Moeen Uddin, Katherine S. Ziemer, Abe Zeid, Yung-Tsun Tina Lee et autres

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Cold atmospheric plasma (CAP) surface nanomodified 3D printed polylactic acid (PLA) scaffolds for bone regeneration

Mian Wang, Pelagie Favi, Xiaoqian Cheng, Negar H. Golshan et autres

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Understanding the Role of Polymer Surface Nanoscale Topography on Inhibiting Bacteria Adhesion and Growth

Luting Liu, Batur Ercan, Linlin Sun, Katherine S. Ziemer et autres

Catheter-associated infections, most of which are caused by microbial biofilms, are still a serious issue in healthcare and are associated with significant morbidity, mortality, and excessive medical costs. Currently, the use of nanostructured materials, especially materials with nanofeatured topographies, which have more …

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