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Search Publications

NIST Authors in Bold

Displaying 1 - 25 of 897

Morphologic alterations across three levels of biological organization following oral exposure to silver-polymer nanocomposites in Japanese medaka (Oryzias latipes)

July 5, 2024
Author(s)
Melissa Chernick, Alan Kennedy, Treye Thomas, Keana C. K. Scott, Joana Sipe, Christine Hendren, Mark Wiesner, David Hinton
Polymer nanocomposites have diverse industrial and commercial uses. While many toxicity studies have assessed the individual materials (e.g., polymer, nanomaterial) comprising nanocomposites, few have examined the potential toxicity of the nanocomposite as

Fully integrated multifunctional sensor and open-source ASIC for flexible wearables

June 25, 2024
Author(s)
Anhang Li, Hongyi Wu, Ashbir Aviat Fadila, Chanho Kye, Arvind Balijepalli, Johan Euphrosine, Tim Ansell, Nigel Coburn, Sachin Nadig, Mehdi Saligane
The open-source hardware movement has made significant progress over the past few years. Increasingly, more individuals are engaging with and participating in the open-source chip design community - not only to design their own chips with the available

Quantifying Mechanical Abrasion of AgNP Nanocomposites used in 3D Printing: Influence of AgNP content on abrasion products and rate of microplastic production

June 7, 2024
Author(s)
Joana Sipe, William Berger, Nathan Bossa, Melissa Chernick, Keana C. K. Scott, Alan Kennedy, Treye Thomas, Christine Ogilvie, Mark Wiesner
Nanomaterials are used in polymer composites to enhance plastic products' properties. Silver nanoparticles (AgNPs) are added to composites for their antimicrobial and fungicidal properties. Polyethylene terephthalate glycol polymer (PETG) AgNP composite

Dealloyed Pt74Ni26 and Pt26Ni74 Electrodeposited Thin Film Electrocatalysts for Oxygen Reduction

May 30, 2024
Author(s)
Carlos Hangarter, Eric Rus, Yihua Liu, Jaw Wook Shin, Vladimir Oleshko, Hyun Wook Ro, Russell Composto, Christopher Soles, Joseph A. Dura, Gery R. Stafford, Leonid Bendersky, Thomas P. Moffat
Pt100-xNix alloys are among the most active binary alloys for electrocatalysis of the oxygen reduction reaction (ORR) in PEM fuel cells. Electrodeposition and microstructure of thin films close to Pt75Ni25 and Pt25Ni75 stoichiometry are described and their

A 0.1 GHz to 1.1 THz Inverted Grounded-CPW mTRL Calibration Kit Characterization in an InP HBT Process

May 13, 2024
Author(s)
Jerome Cheron, Rob Jones, Dylan Williams, Miguel Urteaga, Bryan Bosworth, Nick Jungwirth, Jeffrey Jargon, Ben Jamroz, Chris Long, Nate Orloff, Ari Feldman, Peter Aaen
We report a novel design approach of on-wafer multiline thru-reflect-line (mTRL) calibration kit fabricated on a commercial semiconductor-based transistor process that we validate from 0.1 GHz to 1.1 THz. The on-wafer calibration standards are designed

Understanding the Origin and Implication of the Indirect-to-Direct Bandgap Transition in Multilayer InSe

May 2, 2024
Author(s)
Nicholas Pike, Ruth Pachter, Michael Altvater, Chris Stevens, Matthew Klein, Joshua Hendrickson, Huairuo Zhang, Sergiy Krylyuk, Albert Davydov, Nicholas Glavin
Indium selenide (InSe) multilayers have attracted much interest recently due to their electronic and optical properties, partially dependent on the existence of an indirect-to-direct bandgap transition that is correlated to the multilayer thickness. In

Comparison of Mg-based liquid metal ion sources for scalable focused-ion-implantation doping of GaN

April 18, 2024
Author(s)
Aaron Katzenmeyer, Michael Titze, Sam Frisone, Tony Ohlhausen, Anthony Flores, Deanna Campbell, Bingjun Li, Yongqiang Wang, Jung Han, Edward Bielejec, Rachel Goldman
We compare the suitability of various magnesium-based liquid metal alloy ion sources (LMAIS) for scalable focused-ion-beam (FIB) implantation doping of GaN. We consider GaMg, MgSO4•7H2O, MgZn, AlMg, and AuMgSi alloys. Although issues of oxidation (GaMg)

Self-Assembly of Hierarchical High-h Fluorinated Block Copolymers with an Orthogonal Smectic-within-Lamellae 3 nm Sub-Lattice and Vertical Surface Orientation

April 16, 2024
Author(s)
Bijal Patel, Hongbo Feng, Whitney Loo, Chad R. Snyder, Christopher Eom, Julia Murphy, Daniel Sunday, Paul Nealey, Dean DeLongchamp
Hierarchical structure-within-structure assemblies offer a route toward increasingly complex and multifunctional materials while pushing the limits of block copolymer self-assembly. We present a detailed study of the self-assembly of a series of

Single-particle approach to many-body relaxation dynamics

February 26, 2024
Author(s)
Garnett W. Bryant, Marta Pelc, David Dams, Abhishek Ghosh, Miriam Kosik, Marvin Muller, Carsten Rockstuhl, Andres Ayuela, Karolina Slowik
This study addresses the challenge of modeling relaxation dynamics in quantum many-body systems, specifically focusing on electrons in graphene nanoflakes. While quantum many-body techniques effectively describe dynamics up to a few particles, these

Multi-scale alignment to buried atom-scale devices using Kelvin probe force microscopy

February 24, 2024
Author(s)
Pradeep Namboodiri, Jonathan Wyrick, Gheorghe Stan, Xiqiao Wang, Fan Fei, Ranjit Kashid, Scott Schmucker, Richard Kasica, Bryan Barnes, Michael Stewart, Richard M. Silver
Fabrication of quantum devices by atomic scale patterning with a Scanning Tunneling Microscope (STM) has led to the development of single/few atom transistors, few-donor/quantum dot devices for spin manipulation and arrayed few-donor devices for analog

Optical frequency division & pulse synchronization using a photonic-crystal microcomb injected chip-scale mode-locked laser

February 15, 2024
Author(s)
Chinmay Shirpurkar, Jizhao Zang, Ricardo Bustos-Ramirez, David Carlson, Travis Briles, Lawrence R. Trask, Srinivas V. Pericherla, Di Huang, Ashish Bhardwaj, Gloria E. Hoefler, Scott Papp, Peter J. Delfyett
A mode-locked laser photonic integrated circuit with a repetition rate of 10 GHz is optically synchronized to a tantalabased photonic crystal resonator comb with a repetition rate of 200 GHz. The synchronization is achieved through regenerative harmonic

Heart-on-a-Chip Systems: Disease Modeling and Drug Screening Applications

February 14, 2024
Author(s)
Derrick Butler, Darwin Reyes-Hernandez
Cardiovascular disease (CVD) is the leading cause of death worldwide, casting a substantial economic footprint and burdening the global healthcare system. Historically, pre-clinical CVD modeling and therapeutic screening has been performed using animal

Advancing Measurement Science for Microelectronics: CHIPS R&D Metrology Program

February 13, 2024
Author(s)
Marla L. Dowell, Hannah Brown, Gretchen Greene, Paul D. Hale, Brian Hoskins, Sarah Hughes, Bob R. Keller, R Joseph Kline, June W. Lau, Jeff Shainline
The CHIPS and Science Act of 2022 called for NIST to "carry out a microelectronics research program to enable advances and breakthroughs....that will accelerate the underlying R&D for metrology of next-generation microelectronics and ensure the

Characterization of Nanoparticles in Silicon Dioxide Food Additive

January 4, 2024
Author(s)
Monique Johnson, Antonio Montoro Bustos, Karen Murphy, Sadia Khan, Ingo Strenge, Matthew Kalan
Silicon dioxide (SiO2) is an approved direct food additive in the United States and has been used as an anticaking agent in powdered food products and as a stabilizer in the production of beer. While SiO2 has been used in food for many years, there is

Experimental demonstration of a robust training method for strongly defective neuromorphic hardware

December 11, 2023
Author(s)
William Borders, Advait Madhavan, Matthew Daniels, Vasileia Georgiou, Martin Lueker-Boden, Tiffany Santos, Patrick Braganca, Mark Stiles, Jabez J. McClelland, Brian Hoskins
Neural networks are increasing in scale and sophistication, catalyzing the need for efficient hardware. An inevitability when transferring neural networks to hardware is that non-idealities impact performance. Hardware-aware training, where non-idealities
Displaying 1 - 25 of 897