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Search Publications by

Shinichiro Muramoto (Fed)

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Displaying 1 - 25 of 32

Engineering Magnetic Anisotropy and Emergent Multidirectional Soft Ferromagnetism in Ultrathin Freestanding LaMnO 3 Films

May 24, 2022
Qinwen Lu, Zhiwei Liu, Qun Yang, Hui Cao, Purnima P. Balakrishnan, Qing Wang, Long Cheng, Yalin Lu, Jian-Min Zuo, Hua Zhou, Patrick Quarterman, Shinichiro N. Muramoto, Alexander Grutter, Hanghui Chen, Xiaofang Zhai
Owing to their small coercive fields and weak magnetic anisotropy, soft ferromagnetic films are extremely useful for nanoscale devices that need to easily switch spin directions. However, they are rare, particularly when a film thickness is reduced to a

Detection, counting and characterization of nanoplastics in marine bioindicators: a proof of principle study

April 15, 2021
Jeremie Parot, Andrea Valsesia, Jessica Ponti, Dora Mehn, Rita Marino, Daniela Melillo, Samantha Facchetti, Shinichiro Muramoto, R. Michael Verkouteren, Vincent A. Hackley, Pascal Colpo
Plastic particulates in the environment pose an increasing concern for regulatory bodies due to their potential risk to higher organisms (including humans) as they enter the food chain. Nanoplastics (pNP) (defined here as smaller than 1 µm) are

Visualizing Shed Skin Cells in Fingerprint Residue using Dark Field Microscopy

March 5, 2020
Shinichiro N. Muramoto, William Alexander Osborn, J Greg Gillen
The proof of concept study was able to show that dark field microscopy could be used to provide sufficient contrast for cell visualization in fingerprints with high sebum content. Although the application is limited to smooth surfaces that do not scatter

Applying Planar, Patterned, Multimetallic Samples to Assess the Impact of Analysis Area in Surface-Chemical Analysis: results of a VAMAS Interlaboratory Comparison

February 3, 2020
Christina Passiu, WES Unger, P Rupper, L Gregoratti, M Amanti, P Zeller, C Malitesta, S Rella, SJ Spencer, A Shard, A Kim, Shinichiro N. Muramoto, M Engelhard, B Hagenhoff, B Bock, R Heuberger, P Dietrich, A Thissen, M Kjaervik, D Paul, J Newman, T Weimann, S Butefisch, ND Spencer, A Rossi
The lateral resolution of a surface-analysis instrument is commonly measured as one of the indicators of the quality of obtainable analytical results. Different methods exist to measure this quantity, and traditionally the employed method/reference sample

Exploring the Limits of Bottom-Up Gold Filling to Fabricate Diffraction Gratings

November 27, 2019
Daniel Josell, Stephen J. Ambrozik, Maureen E. Williams, A E. Hollowell, Christian Arrington, Shinichiro Muramoto, Thomas P. Moffat
Gold deposition on rotating disk electrodes, Bi3+ adsorption on planar Au films and superconformal Au filling of trenches up to 45 m deep are examined in Bi+3-containing Na3Au(SO3)2 electrolytes with pH between 9.5 and 11.5. Higher pH is found to increase

Electron Doping BaZrO 3 via Topochemical Reduction

June 19, 2019
Thomas Orvis, Mythili Surendran, Yang Liu, Shanyuan Niu, Shinichiro Muramoto, Alexander Grutter, Jayakanth Ravichandran
We report the topochemical reduction of epitaxial thin films of the cubic perovskite BaZrO3. Reduction with calcium hydride yields n-type conductivity in the films, despite the wide bandgap and low electron affinity of the parent material. X-ray

A Standards and Measurement Infrastructure for Calibration, Verification and Optimization of Trace Explosives Detection Systems

April 15, 2019
John G. Gillen, Jennifer R. Verkouteren, R M. Verkouteren, Marcela N. Najarro, Edward R. Sisco, Matthew E. Staymates, Jessica L. Staymates, Robert A. Fletcher, Jeffrey A. Lawrence, Elizabeth L. Robinson, Alexander T. Bulk, Joseph A. Bennett, Shinichiro Muramoto, Thomas P. Forbes
Current national priorities in homeland security have led to an unprecedented level of utilization of explosives trace detection (ETD) systems for counterterrorism and law enforcement. Despite the widespread deployment of ETD instruments at airports

Targeting hMSC Response via Surface Carbonyl Groups, Contact Angle, and Protein Interactions

March 1, 2019
Max J. Lerman, Shinichiro Muramoto, Navein Arumugasaamy, Michael Van Order, Josephine Lembong, Anushka Gerald, John G. Gillen, John P. Fisher
Traditional 2D culture systems made of polystyrene (PS) require the addition of surface chemistry beyond the nominal phenyl groups present to facilitate and encourage cell adhesion. Determining the surface properties which enhance protein adhesion from

The Evolution of Polystyrene as a Cell Culture Material: A Brief History

April 10, 2018
Max J. Lerman, Josephine Lembong, Shinichiro Muramoto, John G. Gillen, John P. Fisher
Polystyrene (PS) has brought in vitro cell culture from its humble beginnings to the modern era, propelling dozens of research fields along the way. This review discusses the development of the material, fabrication, and treatment approaches to create the

PEGylation of zinc nanoparticles amplifies their ability to enhance olfactory responses to odorant

December 20, 2017
Melissa Singletary, Samantha Hagerty, Shinichiro Muramoto, Yasmine Daniels, William A. MacCrehan, Gheorghe Stan, June W. Lau, Oleg Pustovyy, Ludmila Globa, Edward E. Morrison, Iryna Sorokulova, Vitaly Vodyanoy
Responses of olfactory sensory neurons to odorants are intensely enhanced with the addition of small endogenous and engineered zinc nanoparticles, as shown by physiological experiments. The highest enhancement was recorded with 1.2 nm non-oxidized zinc

After oxidation, zinc nanoparticles lose their ability to enhance responses to odorants

September 20, 2016
Samantha Hagerty, Yasmine C. Daniels, Melissa Singletary, Oleg Pustovyy, Ludmila Globa, William A. MacCrehan, Shinichiro Muramoto, June W. Lau, Edward Morrison, Iryna Sorokulova, Vitaly Vodyanoy, Gheorghe Stan
Electrical responses of olfactory sensory neurons to odorants were examined in the presence of zinc nanoparticles of various sizes and degrees of oxidation. The zinc nanoparticles were prepared by the underwater electrical discharge method and analyzed by

Ultraviolet/Ozone as a tool to control grafting density in surface-initiated controlled-radical polymerizations via ablation of bromine

July 21, 2016
Richard J. Sheridan, Sara V. Orski, Shinichiro Muramoto, Christopher M. Stafford, Kathryn L. Beers
We used an ultraviolet-ozone (UVO) cleaner to create substrates for atom-transfer radical polymerization (ATRP) with varying surface initiator coverage. We collected complementary time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray

Engineered metal nanoparticles in the sub-nanomolar levels kill cancer cells

April 18, 2016
Yasmine C. Daniels, William A. MacCrehan, Shinichiro Muramoto, Gheorghe NMN Stan, Vitaly Vodyanoy, Oleg Pustovyy
Zinc and copper metal nanoparticles were produced from bulk metal rods by an underwater high-voltage discharge method. The metal nanoparticles, with estimated diameters of 1 nm to 2 nm, were determined to be more than 85 % non-oxidized. Exposure of rat RG2

Vapor-Liquid-Solid Etch of Semiconductor Surface Channels by Running Gold Nanodroplets

November 24, 2015
Babak Nikoobakht, Andrew A. Herzing, Shinichiro Muramoto, Jerry Tersoff
We show that Au nanoparticles spontaneously move across the (001) surface of InP, InAs, and GaP when heated in the presence of water vapor. As they move, the particles etch crystallographically aligned grooves into the surface. We show that this process is

Increased carrier mobility and lifetime in CdSe quantum dot thin films through surface passivation and doping

November 4, 2015
Daniel Straus, E. D. Goodwin, E. A. Gaulding, Shinichiro Muramoto, Murray B. Christopher, Cherie R. Kagan
Passivating surface defects and controlling the carrier concentration and mobility in quantum dot (QD) thin films is a prerequisite to designing electronic and optoelectronic devices. We investigate the effect of introducing indium in CdSe QD thin films on