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Displaying 1 - 25 of 848

Federal perspective on critical research issues in nanoEHS

August 31, 2023
Janet Carter, Sri Nadadur, Rhema Bjorkland, William Boyes, Chuck Geraci, Vincent A. Hackley, John Howard, Alan Kennedy, Igor Linkov, Joanna Matheson, Holly Mortensen, Custudio Muinga, Elijah Petersen, Nora Savage, Stacey Standridge, Trey Thomas, Benjamin Trump
This article discusses critical issues and opportunities going forward in nanotechnology environmental, health, and safety (nanoEHS) research from the perspective of Federal Government agency participants in the U.S. National Nanotechnology Initiative (NNI

Fabrication of Specimens for Atom Probe Tomography using a Combined Gallium and Neon Focused Ion Beam Milling Approach

August 16, 2023
Frances Allen, Paul Blanchard, David Pappas, Russell Lake, Deying Xia, John Notte, Ruopeng Zhang, Andrew Minor, Norman A. Sanford
We demonstrate a new focused ion beam sample preparation method for atom probe tomography. The key aspect of the new method is that we use a neon ion beam for the final tip shaping after conventional annulus milling using gallium ions. This dual-ion

Evaluating the thermal performance of perovskite SrSnO3 field effect transistors

July 13, 2023
Bivek Bista, Prafful Golani, Fengdeng Liu, Tristan Truttmann, Georges Pavlidis, Andrea Centrone, Bharat Jalan, Steven Koester
Given the ever increasing, global electricity consumption, improving the efficiency and reliability of high-power electronics is of paramount importance. Ultra-wide band gap (> 3.4 eV) semiconductors have shown the potential to be used in the next

Operando photoelectron spectromicroscopy of nanodevices: Correlating the surface chemistry and transport in SnO2 nanowire chemiresistors

June 29, 2023
Andrei Kolmakov, Trey Diulus, Kurt D. Benkstein, Stephen Semancik, Majid Kazemian, Matteo Amati, Maya Kiskinova, Luca Gregoratti
With size reduction of active elements in microelectronics to tens of nanometers and below, the effect of surface and interface properties on overall device performance becomes crucial. High resolution spectroscopic and imaging techniques provide a

International Interlaboratory Comparison (ILC) of Thermogravimet-ric (TGA) Measurements of Graphene Materials

March 14, 2023
Pei Lay Yap, Farzaneh Farivar, Victoria Coleman, Asa Jamting, Sam Gnaniah, Elisabeth Mansfield, Cheng Pu, Sandra Marcela Landi, Marcus Vinicius David, Emmanuel Flahaut, Paul Finnie, Mary Gallerneault, M. Dominque Locatelli, Sebastien Jacquinot, Carltoa Gray Slough, Jan Hanss, Jorg Menzel, Stefen Schmolzer, Lingling Ren, Andrew Pollard, Dusan Losic
Graphene materials are strongly emerging from academic research labs into industrial sectors with many developed products on market. Characterizations and quality control of graphene materials are very critical with an urgent demand for reliable

Inhibition of human APE1 and MTH1 DNA repair proteins by dextran-coated g-Fe2O3 ultrasmall superparamagnetic iron oxide nanoparticles

February 28, 2023
Erdem Coskun, Pawel Jaruga, Miral M. Dizdar, Bryant C. Nelson, Neenu Singh, Leona Scanlan, Shareen Doak
Aim: To quantitatively evaluate the inhibition of human DNA repair proteins APE1 and MTH1 by dextran-coated γ-Fe2O3 ultrasmall superparamagnetic iron oxide nanoparticles (dUSPIONs). Materials & methods: Liquid chromatography–tandem mass spectrometry with

Control of Micro-and Nanostructure of Layered Double Hydroxides by Hydrothermal Treatment

February 23, 2023
Keiichiro Maegawa, Fan Zhang, Qiaxian Johnson, Mihaela Jitianu, Tan Wai Kian, Go Kawamura, Atsunori Matsuda, Andrei Jitianu
Layered double hydroxides (LDHs) are mixed M(II) and M(III) hydroxides with positively charged lamellar brucite layers and interlayered anions. LDHs attracted significant attention due to their anion and cation-exchange ability, adsorption capacity, and

Dynamic structural and microstructural responses of a metal organic framework type material to carbon dioxide under dual gas flow and supercritical conditions

February 1, 2023
Andrew J. Allen, Eric J. Cockayne, Winnie Wong-Ng, Jeffrey Culp, Ivan Kuzmenko
The structural and microstructural responses of a model metal-organic framework (MOF) material, Ni(3-Methy-4,4'-bipyridine)[Ni(CN)4] (Ni-BpyMe or PICNIC 21), to CO2 adsorption and desorption are reported for in situ small-angle X-ray scattering (SAXS) and

High-Resolution DNA Hybridization Kinetics Measurements with Double Gate FD-SOI Transistors

January 23, 2023
Seulki Cho, Alexander Zaslavsky, Curt A. Richter, Jacob Majikes, James Alexander Liddle, Francois Andrieu, Sylvain Barraud, Arvind Balijepalli
Double gate fully depleted SOI transistors operating in a remote gate configuration and under closed-loop feedback allow noise performance that exceeds their single gate counterparts by more than an order of magnitude. We leverage this high performance to

Voltage Modulated Magnetic Anisotropy of Rare Earth Iron Garnet Thin Films on a Piezoelectric Substrate

December 19, 2022
Miela Gross, Walid Al Misba, Kensuke Hayashi, Dhritiman Bhattacharya, Daniel Gopman, Jayasimha Atulasimha, Caroline Ross
Voltage-tuning of the magnetic anisotropy is dempnstrated in ferrimagnetic insulating rare earth iron garnets on a piezoelectric substrate, (011)-oriented PMN-PT. A yttrium-substituted dysprosium iron garnet (YDyIG) film 42 nm thick is grown via pulsed

Efficient chip-based optical parametric oscillators from 590 nm to 1150 nm

December 2, 2022
Jordan Stone, Xiyuan Lu, Gregory Moille, Kartik Srinivasan
Optical parametric oscillators are a ubiquitous technology used to generate coherent light at frequencies not accessible by conventional laser gain. However, chip-based parametric oscillators operating in the visible spectrum have suffered from pump-to

Reflow transfer for conformal three-dimensional microprinting

November 24, 2022
Gary Zabow
From microcircuits to metamaterials, micropatterning surfaces adds valuable functionality. For non-planar surfaces, however, incompatibility with conventional microlithography requires transferring originally planar micropatterns onto those surfaces but

Introduction of nanoscale positive controls for nanotoxicology: A new aspect of utilization of stability-enhanced Gold-Polyethyleneimine conjugates (Au-PEIs)

November 8, 2022
Tae Joon Cho, Vincent A. Hackley, Vytas Reipa, Alessandro Tona, Christopher Sims, Natalia Farkas
Polyethyleneimine (PEI) conjugated gold nanoparticles (Au-PEIs) have potential use as positively charged gold nanoparticles (AuNPs) for nanomedical applications, due to their cationic surface that promotes cellular uptake and gene transfection. We report

Heterojunction tunnel triodes based on two-dimensional metal selenide and three-dimensional silicon

October 27, 2022
Jinshui Miao, Chloe Leblanc, Jinjin Wang, Yue Gu, Xiwen Liu, Baokun Song, Huairuo Zhang, Sergiy Krylyuk, Weida Hu, Albert Davydov, Tyson Back, Nicholas Glavin, Deep Jariwala
Low power consumption in the static and dynamic modes of operation is a key requirement in the development of modern electronics. Tunnel field-effect transistors with direct band-to-band charge tunnelling and steep-subthreshold-slope transfer

High-Throughput Nanopore Fabrication and Classification Using Xe-Ion Irradiation and Automated Pore-Edge Analysis

September 26, 2022
Michal Macha, Sanjin Marion, Mukesh Tripathi, Martina Lihter, Alex Smolyanitsky, Andras Kis, Aleksandra Radenovic
Large-area nanopore drilling is a major bottleneck in state-of-the-art nanoporous 2D membrane fabrication protocols. In addition, high-quality structural and statistical descriptions of as-fabricated porous membranes are key to predicting the corresponding

Tightly Confined Surface Acoustic Waves as Microwave-to-Optical Transduction Platforms in the Quantum Regime

September 26, 2022
Ryan DeCrescent, Zixuan Wang, Poolad Imany, Robert Boutelle, Corey McDonald, Travis Autry, John Teufel, Sae Woo Nam, Richard Mirin
Surface acoustic waves (SAWs) coupled to quantum dots (QDs), trapped atoms and ions, and point defects have been proposed as quantum transduction platforms, yet the requisite coupling rates and cavity lifetimes have not been experimentally established

Size and Number Concentration Measurements of Polystyrene Nanoparticle Suspensions using Several Different Techniques

September 8, 2022
Paul C. DeRose, Kurt D. Benkstein, Elzafir B. Elsheikh, Adolfas K. Gaigalas, Sean Lehman, Dean C. Ripple, Linhua Tian, Wyatt N. Vreeland, Adam York, Yu-Zhong Zhang, Lili Wang
The number concentrations of nominal 100 nm, 200 nm and 500 nm diameter, fluorescently-labeled polystyrene nanosphere suspensions were measured using seven different techniques. Diameter values were also measured where possible. The diameter values were
Displaying 1 - 25 of 848