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Nanotechnology

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Displaying 151 - 175 of 912

Facile fabrication and characterization of kraft lignin@Fe3O4 nanocomposites using pH driven precipitation: effects on increasing lignin content

April 1, 2021
Author(s)
Frankie A. Petrie, Justin Gorham, Robert T. Busch, Serhiy O. Leontsev, Esteban E. Urena-Benavides, Erick S. Vasquez
Kraft lignin@Fe3O4 multicore nanocomposites fabrication proceeded using a simple pH-driven precipitation technique. An alkaline solution for kraft lignin (pH 12) was rapidly injected into an aqueous-based magnetite (Fe3O4) nanoparticle colloidal suspension

Spectral Analysis of Line Edge and Line Width Roughness using Wavelets

April 1, 2021
Author(s)
Ndubuisi George Orji
Although line edge and line width roughness (LER/LWR) have been key metrology challenges over the last 15 years, the advent of extreme-ultraviolet lithography (EUV) has increased the importance of its measurement and control. Lithographically printed

From single-particle-like to interaction-mediated plasmonic resonances in graphene nanoantennas

March 4, 2021
Author(s)
Marvin M. Muller, Miriam Kosik, Marta Pelc, Garnett W. Bryant, Andres Ayuela, Carsten Rockstuhl, Karolina Slowik
Plasmonic nanostructures attract tremendous attention as they confine electromagnetic fields well below the diffraction limit while simultaneously sustaining extreme local field enhancements. To fully exploit these properties, the identification and

Comparative study of multiwall carbon nanotube nanocomposites by Raman, SEM, and XPS measurement techniques

March 3, 2021
Author(s)
Yanmei Piao, Vipin Tondare, Chelsea S. Davis, Justin Gorham, Elijah Petersen, Jeffrey W. Gilman, Keana Scott, Andras Vladar, Angela R. Hight Walker
Substantial ongoing research efforts are investigating the production of novel composite material enhanced by the incorporation of nanomaterial fillers such as multiwall carbon nanotubes (MWCNTs). While the addition of MWCNTs have been shown to improve the

National Institute of Standards and Technology Environmental Scan 2020

February 9, 2021
Author(s)
Heather Evans, Kristen K. Greene, William M. Healy, Elizabeth Hoffman, Kate Rimmer, Anna V. Sberegaeva, Neil M. Zimmerman
The 2020 National Institute of Standards and Technology Environmental Scan provides an analysis of key external factors that could impact NIST and the fulfillment of its mission in coming years. The analyses were conducted through four separate lenses

Graphene Quantum Hall Effect Parallel Resistance Arrays

February 2, 2021
Author(s)
Alireza Panna, I Fan Hu, Mattias Kruskopf, Dinesh K. Patel, Dean G. Jarrett, Chieh-I Liu, Shamith Payagala, Dipanjan Saha, Albert Rigosi, David B. Newell, Chi-Te Liang, Randolph Elmquist
As first recognized in 2010, epitaxial graphene on SiC(0001) provides a platform for quantized Hall resistance (QHR) metrology unmatched by other 2D structures and materials. Here we report graphene parallel QHR arrays, with metrologically precise

Polyvinyl Acetate-Based Polymer Host for Optical and Far-Infrared Spectroscopy of Individualized Nanoparticles

January 15, 2021
Author(s)
Jeffrey Fagan, Henry Wladkowski, Julian Duarte, Shashank R. Nandyala, Joshua Walker, Subash Kattel, Jeffrey Blackburn, Jon Pikal, William D. Rice
Preparation techniques for producing films of individualized, solution dispersed nanoparticles (NPs) for optical spectroscopy are often technically challenging and tailored for a specific NP system. In this work, we present a rapid, easy, and economical

Microscale Photopatterning of Through-thickness Modulus in a Monolithic and Functionally Graded 3D Printed Part

December 24, 2020
Author(s)
Asais C. Uzcategui, Callie I. Higgins, John Hergert, Andrew Tomaschke, Victor Crespo-Cuevas, Virginia L. Ferguson, Stephanie Bryant, Robert R. McLeod, Jason Killgore
3D printing is transforming traditional processing methods in applications ranging from tissue engineering to optics. To fulfill its maximum potential, 3D printing requires a robust technique for producing structures with precise three-dimensional (x, y

Microscopic Origin of Inhomogeneous Transport in Four-Terminal Tellurene Devices

December 22, 2020
Author(s)
Benjamin Kupp, Gang Qiu, Yixiu Wang, Clayton Caspeer, Thomas Mitchell (Mitch) Wallis, Joanna Atkin, Wenzhuo Wu, Peide Ye, Pavel Kabos, Samuel Berweger
Tellurene—the 2D form of elemental tellurium—provides an attractive alternative to conventional 2D semiconductors due to its high bipolar mobilities, facile solution processing, and the possibility of dopant intercalation into its 1D van der Waals lattice

Certification of Standard Reference Material(R) 1992 / ERM(R)-FD305 Zeta Potential - Colloidal Silica (Nominal Mass Fraction 0.15 %)

November 24, 2020
Author(s)
Yannic Ramaye, Vikram Kestens, J. Charoud-Got, S. Mazoua, G. Auclair, Tae Joon Cho, Blaza Toman, Vincent A. Hackley, T. Linsinger
This report describes the production of SRM 1992/ERM-FD305, silica particles suspended in a borate buffer, certified for electrophoretic mobility and zeta potential by electrophoretic light scattering (ELS). This material was produced following ISO 17034

Certification of Standard Reference Material(R) 1993 / ERM(R)-FD306 Zeta Potential - Colloidal Silica (Nominal Mass Fraction 2.2 %)

November 24, 2020
Author(s)
Yannic Ramaye, Vikram Kestens, J. Charoud-Got, S. Mazoua, G. Auclair, Tae Joon Cho, Blaza Toman, Vincent A. Hackley, T. Linsinger
This report describes the production of SRM 1993/ERM-FD306, silica particles suspended in a borate buffer, certified for electrophoretic mobility and zeta potential by electrophoretic light scattering (ELS). This material was produced following ISO 17034

Parallel multi-parameter study of PEI-functionalized gold nanoparticle synthesis for bio- medical applications: Part 2. Elucidating the role of surface chemistry and polymer structure on performance

November 10, 2020
Author(s)
Tae Joon Cho, Justin M. Gorham, John M. Pettibone, Jingyu Liu, Jiaojie Tan, Vincent A. Hackley
Despite the breadth and quality of published work in this area, it remains unclear how the specific properties of polyethyleneimine (PEI) and the methods utilized to conjugate it to gold nanoparticles (AuNPs) impact the final product morphology and

Plasmonic Electronic Raman Scattering as Internal Standard for Spatial and Temporal Calibration in Quantitative Surface-enhanced Raman Spectroscopy

October 28, 2020
Author(s)
Wonil Nam, Yuming Zhao, Junyeob Song, Seied Ali Safiabadi Tali, Seju Kang, Wenqi Zhu, Henri Lezec, Amit Agrawal, Peter J. Vikesland, Wei Zhou
Ultrasensitive surface-enhanced Raman spectroscopy (SERS) still faces difficulties in quantitative analysis because of its susceptibility to local optical field variations at plasmonic hotspots in metallo-dielectric nanostructures. Current SERS calibration

Photorealistic full-color nanopainting enabled by a low-loss metasurface

September 4, 2020
Author(s)
Pengcheng Huo, Maowen Song, Wenqi Zhu, Cheng Zhang, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
We design and experimentally demonstrate a TiO2 metasurface that enables full-color generation and ultrasmooth color brightness variations. The reproduced famous artwork "girl with a pearl earring" features photorealistic color representation and

The Art in Science of MicroTAS 2019

July 28, 2020
Author(s)
Gregory A. Cooksey
The 2019 MicroTAS conference (the 23rd International Conference of Miniaturized Systems for Chemistry and Life Sciences) held in Basel, Switzerland, brought great opportunities to viewinspiring microscale compositions. Many of the best images were

Broadband detection of multiple spin and orbital angular momenta via dielectric metasurface

July 26, 2020
Author(s)
Si Zhang, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Peng Chen, Mingze Liu, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Light beams carrying spin angular momentum (SAM) and orbital angular momentum (OAM) have created novel opportunities in the areas of optical communications, imaging, micromanipulation and quantum optics. However, complex optical setups are required to
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