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Search Publications by: Juscelino Leao (Fed)

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Displaying 1 - 25 of 78

Development and performance of a low-cost, solid-state, thermal neutron sensor with a 10B converter

December 5, 2024
Author(s)
Priscila Costa, Jamie Weaver, M Raele, Kevin Pritchard, Juscelino Leao, C Domienikan, Nicholas C. Maliszewskyj, F da Silva, W Pereira, Frederico Genezini
This study demonstrates the construction and operation of a portable, solid-state thermal neutron sensor that utilizes a photodiode coated with a thin layer of boron-10 (10B). The boron layer was created using pulsed laser deposition and analyzed through

Liquid Piston Based on Molecular Springs for Energy Storage Applications

May 10, 2023
Author(s)
Mehdi Hashemi-Tilehnoee, Nikolay Tsirin, Victor Stoudenets, Yuriy Bushuev, Miroslaw Chorazewski, Mian Li, Dan Li, Juscelino Leao, Markus Bleuel, Pawel Zajdel, Elena Palomo Del Barrio, Yaroslav Grosu
Liquid piston is a method for pressure transmission used in a wide range of technologies. Currently, liquid piston is a passive element solely used to apply pressure to a working body. In this work, the concept of liquid piston based on molecular springs –

The Effect of Organic Coatings in the Magnetization of CoFe 2 O 4 Nanoparticles

August 4, 2022
Author(s)
Priscyla L. Andrade, Valdeene Silva, Kathryn L. Krycka, Juscelino Leao, I-Lin Liu, Maria P. Silva, J. Albino Aguiar
Cobalt ferrite has attracted considerable attention in recent years due to the unique physical properties such as high Curie temperature, large magnetocrystalline anisotropy, high coercivity, moderate saturation magnetization, large magnetostrictive

Results from neutron imaging phase change experiments with LH2 and LCH4

July 2, 2022
Author(s)
Kishan Bellur, Ezequiel Medici, Daniel Hussey, David Jacobson, Jacob LaManna, Juscelino Leao, Julia Scherschligt, James Hermanson, Chang Kyoung Choi, Jeffrey Allen
Predicting evaporation and cryo-storage behavior of liquid hydrogen poses a challenge for both terrestrial energy infrastructure and long term space missions. The current understanding of cryogenic phase change and subsequent boil-off is limited, in part

Turning Molecular Springs into Nano-Shock Absorbers: The Effect of Macroscopic Morphology and Crystal Size on the Dynamic Hysteresis of Water Intrusion-Extrusion into-from Hydrophobic Nanopores

June 15, 2022
Author(s)
Pawel Zajdel, David Madden, Robin Babu, Diego Mirani, Nikolay Tsyrin, Luis Bartolome, Eder Amayuelas, David Fairen-Jimenez, Alexander Lowe, Miroslaw Chorazewski, Juscelino Leao, Craig Brown, Markus Bleuel, Victor Stoudenets, Maria Echeverria, Francisco Bonilla, Giulia Grancini, Simone Meloni, Yaroslav Grosu
Controlling the pressure at which liquids intrude (wet) and extrude (dry) into/from nanopore is of paramount importance for a broad range of applications, such as energy conversion, catalysis, chromatography, separation, ionic channels, and many more. To

In-situ Monitoring of Protein Unfolding/Structural States under Cold High-Pressure Stress

November 26, 2021
Author(s)
Diana Gomes, Susana C. Marujo Teixeira, Juscelino Leao, Vladimir Razinkov, Wei Qi, Miguel Rodrigues, Christopher Roberts
Biopharmaceutical formulations may be compromised by freezing, which has been attributed to protein conformational changes at a low temperature, and adsorption to ice−liquid interfaces. However, direct measurements of unfolding/conformational changes in

Promoting Persistent Superionic Conductivity in Sodium Monocarba-closo-dodecaborate NaCB11H12 via Confinement within Nanoporous Silica

July 26, 2021
Author(s)
Mikael Andersson, Vitalie Stavila, Alexander V. Skripov, Mirjana Dimitrievska, Malgorzata T. Psurek, Juscelino Leao, Olga Babanova, Roman Skoryunov, Alexei Soloninin, Maths Karlsson, Terrence J. Udovic
Superionic phases of bulk anhydrous salts based on large cluster-like polyhedral (carba)borate anions are generally stable only well above room temperature, rendering them unsuitable as solid-state electrolytes in energy-storage devices that typically

Controlling Bicontinuous Structures through Solvent Segregation Driven Gel

February 16, 2021
Author(s)
Yuyin Xi, Juscelino Leao, Qiang Ye, Ronald S. Lankone, Li Piin Sung, Yun Liu
The past decade has seen increased research interests in studying bicontinuous structures formed by the colloidal self-assembly due to their many useful applications. A new type of colloidal gel, solvent segregation driven gel (SeedGel), has been recently

Heat Transfer Analysis Study for the Design of the New Polychromatic Beam Neutron Reflectometer CANDOR (Chromatic Analysis Neutron Diffractometer Or Reflectometer)

December 16, 2020
Author(s)
Lior Uzan, Juscelino Leao, Christoph W. Brocker, Daniel A. Mattes, Tanya J. Dax
A newly developed polychromatic beam neutron reflectometer CANDOR (Chromatic Analysis Neutron Diffractometer Or Reflectometer) on NG-1 at the NIST Center for Neutron research (NCNR) utilizes a wavelength-sensitive neutron detector consisting of 324

Evolution of the Magnetic Properties in the Antiferromagnet Ce 2 RhIn 8 Simultaneously Doped with Cd and Ir

November 20, 2020
Author(s)
D. S. Christovam, G. S. Freitas, M. M. Piva, J. C. Souza, M. O. Malcolms, O. L. Canton, Juscelino Leao, William D. Ratcliff, Jeffrey W. Lynn, C. Adriano, P. G. Pagliuso
We report the evolution of the magnetic properties of Ce 2Rh 1−xIr xIn 8−yCd y single crystals. In particular, for Ce 2Rh 0.5Ir 0.5In 8 (T N = 2.0 K) and Ce 2Rh 0.5Ir 0.5In 7.79Cd 0.21 (T N = 4.2 K), we have solved the magnetic structure of these compounds