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Nanotechnology

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Displaying 176 - 200 of 912

Achieving meV tunneling resolution in an in-operando scanning tunneling microscopy, atomic force microscopy, and magnetotransport system for quantum materials research

July 6, 2020
Author(s)
Johannes Schwenk, Sungmin Kim, Julian Berwanger, Fereshte Ghahari Kermani, Daniel T. Walkup, Marlou R. Slot, Son T. Le, W. G. Cullen, Steven R. Blankenship, Sasa Vranjkovic, Hans Hug, Young Kuk, Franz Giessibl, Joseph A. Stroscio
Research in new quantum materials require multi-mode measurements spanning length scales, correlations of atomic scale variables with macroscopic function, and with an ultimate energy resolution only obtainable at ultra-low temperatures, typically in a

Error Estimation and Enhanced Stiffness Sensitivity in Contact Resonance Force Microscopy with a Multiple Arbitrary Frequency Lock-In Amplifier (MAFLIA)

May 29, 2020
Author(s)
Erin Flater, Arya Mugdha, Saurabh Gupta, William Hudson, Abbigail Fahrenkamp, Jason Killgore, Jesse Wilson
In contact resonance force microscopy and related dynamic atomic force microscopy methods, an accurate description of the real-time cantilever dynamics is essential to the mapping of local material properties, such as viscoelasticity, piezo response, and

Chiroptical response of aluminum nano-crescents at ultraviolet wavelengths

April 21, 2020
Author(s)
Matthew S. Davis, Wenqi Zhu, Jared Strait, Jay K. Lee, Henri Lezec, Steve Blair, Amit Agrawal
Manipulation of plasmon modes at ultraviolet wavelengths using engineered nanophotonic devices allows for the development of high-sensitivity chiroptical spectroscopy systems. We present here a framework for the fabrication and characterization of Al based

Twist Angle-Dependent Atomic Reconstruction and Moire Patterns in Transition Metal Dichalcogenide Heterostructures

March 13, 2020
Author(s)
Matthew R. Rosenberger, Hsun-Jen Chuang, Vladimir Oleshko, Madeleine Phillips, Kathleen M. McCreary, Saujan V. Sivaram, C. Stephen Hellberg, Berend T. Jonker
Van der Waals layered materials, such as the transition metal dichalcogenides (TMDs), are an exciting class of materials with weak interlayer bonding which enables one to create so-called van der Waals heterostructures (vdWH). One promising attribute of

Field Ion Emission in an Atom Probe Microscope Triggered by Femtosecond-Pulsed Coherent Extreme Ultraviolet Light

March 12, 2020
Author(s)
Ann C. Chiaramonti Debay, Luis Miaja Avila, Benjamin W. Caplins, Paul T. Blanchard, Norman A. Sanford, Brian Gorman, David R. Diercks
This paper reports construction of an extreme ultraviolet (EUV) radiation-triggered atom probe tomograph and describes the results from initial experiments on amorphous SiO2. Femtosecond-pulsed coherent EUV radiation of 29.6 nm wavelength (41.85 eV photon

Photonic spin-multiplexing metasurface for switchable spiral phase contrast imaging

March 10, 2020
Author(s)
Pengcheng Huo, Cheng Zhang, Wenqi Zhu, Mingze Liu, Song Zhang, Si Zhang, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
As the two most representative operation modes in an optical imaging system, bright-field imaging and phase contrast imaging can address different dimensionalities of an object. Developing a miniature and low-cost system capable of switching between these

Defining Near-term to Long-term Research Opportunities to Advance Metrics, Models, and Methods for Smart and Sustainable Manufacturing

February 21, 2020
Author(s)
Arvind Shankar Raman, Karl Haapala, Kamyar Raoufi, Barbara S. Linke, William Z. Bernstein, KC Morris
Over the past century, research has focused on continuously improving the performance of manufacturing processes and systems - often measured in terms of cost, quality, productivity, and material and energy efficiency. With the advent of smart

Emerging Standards for Nanotechnology-Enabled Medical Products

February 21, 2020
Author(s)
Bryant C. Nelson, Caterina Minelli, Shareen H. Doak, Matthias Roesslein
The development and application of nanotechnology-enabled medicinal products, including drugs, devices and in vitro diagnostics, is rapidly expanding in the global market place. In this review, the focus is on providing the reader an introduction to the

Imaging Carrier Inhomogeneities in Ambipolar Tellurene Field Effect Transistors

February 12, 2020
Author(s)
Samuel Berweger, Gang Qiu, Yixiu Wang, Benjamin Pollard, Kristen Genter, Thomas Mitchell (Mitch) Wallis, Wenzhuo Wu, Peide Ye, Pavel Kabos
Bipolar transport underpins a wide range of semiconductor homojunction device functionalities such as pn junctions or transistors. The capability to image and understand spatial inhomogeneities un carrier type and the conductivity associated with each

Metal adsorbate interactions and the convergence of density functional calculations

February 10, 2020
Author(s)
Christoph Rohmann, Maicol A. Ochoa, Michael P. Zwolak
The adsorption of metal atoms on nanostructures, such as graphene and nanotubes, plays an important role in catalysis, electronic doping, and tuning material properties. Quantum chemical calculations permit the investigation of this process to discover

Ultra-compact visible light depolarizer based on dielectric metasurface

February 4, 2020
Author(s)
Yilin Wang, Wenqi Zhu, Cheng Zhang, Qingbin Fan, Lu Chen, Henri Lezec, Amit Agrawal, Ting Xu
With rapid development towards shrinking the size of traditional photonic systems such as cameras, spectrometers, displays and illumination systems, there is an urgent need for high performance and ultra-compact functional optical elements. The large

The role of ICP-MS in Separation Science

December 17, 2019
Author(s)
Antonio R. Montoro Bustos
Since its introduction in the 1980s, inductively coupled plasma mass spectrometry (ICP-MS) has evolved to become arguably the most versatile and powerful technique for the elemental analysis of metals, metalloids and selected non-metals at (ultra-)trace

Characterization of Size and Aggregation for CNC Dispersions Separated by Asymmetrical-flow Field-flow Fractionation

December 9, 2019
Author(s)
Jeremie Parot, Arnab K. Mukherjee, Martin Couillard, Maohui Chen, Shan Zou, Vincent A. Hackley, Linda Johnston
Cellulose nanocrystals derived from various types of cellulose biomass have significant potential for applications that take advantage of their availability from renewable natural resources and their high mechanical strength, biocompatibility and ease of

Harmonizing Across Environmental Nanomaterial Testing Media for Increased Comparability of Nanomaterial Datasets

November 8, 2019
Author(s)
Nicholas Geitner, Christine O. Hendren, Geert Cornelis, Ralf Kaegi, Jamie Lead, Gregory Lowry, Iseult Lynch, Bernd Nowack, Elijah Petersen, Emily Bernhardt, Scott Brown, Warren Chan, Camille de Garidel-Thoron, Jaydee Hanson, Stacey Harper, Kim Jones, Frank von der Kammer, Alan Kennedy, Justin Kidd, Cole Matson, Christopher Metcalf, Joel Pedersen, Willie Peijnenburg, Joris Quik, Sonia Rodriguez, Jerome Rose, Phil Sayre, Marie Simonin, Claus Svendsen, Robert Tanguay, Nathalie Tukenji, Tom van Teunenbroek, Gregory Thies, Yuan Tian, Jacelyn Rice, Jie Liu, Jason Unrine, Marina Vance, Jason White, Mark Wiesner
The chemical composition and properties of environmental media play defining roles in determining nanomaterial (NM) transport, fate, biouptake, and even organism response. To compare and interpret experimental data, it is essential that sufficient context

Copper Nanocubes for CO2 Reduction in Gas Diffusion Electrodes

October 31, 2019
Author(s)
Yuxuan Wang, Hao Shen, Ken J. Livi, David Raciti, Han Zong, John Gregg, Mofopefoluwa Onadeko, Yidong Wang, Adam Watson, Chao Wang
Electroreduction of CO2 represents a promising solution for addressing the global challenges in energy and sustainability. The reaction is highly sensitive to the surface structure of electrocatalysts and the local electrochemical environment. We have

Ultrathin Wetting Layer-Free Plasmonic Gold Films

October 3, 2019
Author(s)
Robert Lemasters, Cheng Zhang, Manoj Manjare, Wenqi Zhu, Junyeob Song, Sergei Urazhdin, Henri Lezec, Amit Agrawal, Hayk Harutyunyan
Ultrathin gold films are attractive for plasmonic and metamaterial devices, thanks to their useful optical and optoelectronic properties. However, deposition of ultrathin continuous Au films of few nanometer thickness is challenging and generally requires

High spin-wave propagation length consistent with low damping in a metallic ferromagnet

August 31, 2019
Author(s)
L. Flacke, L. Liensberger, Matthias Althammer, Hans Huebl, Stephan Gepr?ags, Katrin Schultheiss, Aleksandr Buzdakov, T. Hula, H. Schultheiss, Eric R. Edwards, Hans Nembach, Justin Shaw, Rudolf Gross, M. Weiler
We report ultralow intrinsic magnetic damping in Co 25Fe 75 heterostructures, reaching the low 10 -4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties

Parallel multi-parameter study of PEI-functionalized gold nanoparticle synthesis for bio-medical applications: Part 1. A critical assessment of methodology, properties and stability

August 20, 2019
Author(s)
Tae Joon Cho, Justin M. Gorham, John M. Pettibone, Jingyu Liu, Jiaojie Tan, Vincent A. Hackley
Cationic polyethyleneimine (PEI) conjugated gold nanoparticles (AuNPs) that are chemically and physically stable under physiological conditions are an ideal candidate for certain bio-medical applications, in particular DNA transfection. However, the

Engineered Sulfur-MoS2-Graphene Heterostructure Cathodes for Diagnostics of Nanoscale Electrochemical Processes in High Energy Density Li-S Batteries

August 5, 2019
Author(s)
Vladimir P. Oleshko, William R. McGehee, Saya Takeuchi, Siyuan Zhang, Andrei A. Kolmakov, Jabez J. McClelland, Christopher L. Soles
Lithium-sulfur (Li-S) batteries have recently attracted enormous attention because of high theoretical specific energy (2600 Wh kg-1) and high specific capacity (1672 mAhg-1), as well as the low cost, natural abundance, and nontoxicity of elemental sulfur
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