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Simulation of an electrostatic quadrupole quadruplet focusing lens system for MeV multi-ion micro-beam
Article presents the simulations of an electrostatic quadrupole quadruplet (EQQ) lens system that will be used in a new sub-micron multi-ion beam for radiobiological studies.
Date:
October 2, 2019
Creator:
Glass, Gary A.; Chirayath, V. A.; Arya, H.; Jin, M.; Weiss, A. H. & Chi, Y.
Object Type:
Article
System:
The UNT Digital Library
Deep Minima and Vortices for Positronium Formation in Low-Energy Positron-Hydrogen Collisions
Article using the two-channel Kohn inverse and Kohn variational methods to investigate ground-state positronium (Ps) formation in positron-hydrogen collisions in the Ore gap. This is the Accepted Manuscript Version of the article.
Date:
September 30, 2019
Creator:
Alrowaily, Albandari W.; Quintanilla, Sandra J. & Van Reeth, P.
Object Type:
Article
System:
The UNT Digital Library
Tunable Hybrid Phononic Crystal Lens Using Thermo-Acoustic Polymers
Article describes a study where a tunable hybrid solid ultrasonic lens is realized by combining a PnC lens with PVA-PNIPAm thermoacoustic hydrogel to modify the transmission and dispersion properties of transient acoustic waves.
Date:
September 30, 2019
Creator:
Walker, Ezekiel; Reyes-Contreras, Delfino; Jin, Yuqi & Neogi, Arup
Object Type:
Article
System:
The UNT Digital Library
The Stability of Metallic MoS₂ Nanosheets and Their Property Change by Annealing
This article focuses on the effects of mild annealing on the structural and physical properties of the MoS₂ by heating the nanosheets in air and vacuum up to 350 °C. It was found that the annealing leads to an increase in resistivity for the nanosheets by 3 orders of magnitude, the appearance of two absorption bands in the visible range, and a hydrophilic to hydrophobic change in the surface wetting properties. Overall, this study provides another way to control the electrical, optical, and surface properties of MoS₂ nanosheets for fulfilling the needs of various applications.
Date:
September 24, 2019
Creator:
Li, Li; Chen, Jiyang; Wu, Keyue; Cao, Chunbin; Shi, Shiwei & Cui, Jingbiao
Object Type:
Article
System:
The UNT Digital Library
Mechanical Properties of Chemically Modified Clay
Article uses first principles methods to compare the mechanical properties of lizardite Mg3(Si2O5)(OH)4, a polymorph of serpentine family, with the new compounds derived by substituting Mg ions with isovalent elements from different chemical groups.
Date:
September 23, 2019
Creator:
Gusmão, M. S.; Gopal, Priya; Siloi, Ilaria; Curtarolo, Stefano; Fornari, Marco & Buongiorno Nardelli, Marco
Object Type:
Article
System:
The UNT Digital Library
Artificially structured boundary plasma trap
This article presents a computer simulation of single-species non-neutral plasma confinement using an artificially structured boundary. The results support the prospect of developing plasma space-charge based confinement, with an unmagnetized plasma of one species of charged particles confined by an electric field produced by an edge-confined plasma of a second species of charged particles.
Date:
September 20, 2019
Creator:
Hedlof, R. M. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Structure and Electronic Properties of InSb Nanowires Grown in Flexible Polycarbonate Membranes
The article explores the various factors that affect nucleation and nanowire growth. A dense array of vertically aligned indium antimonide (InSb) nanowires with high aspect ratio were grown in the pores of a track-etched polycarbonate membrane via a one-step electrochemical method.
Date:
September 5, 2019
Creator:
Singh, Abhay; Roccapriore, Kevin M.; Algarni, Zaina; Salloom, Riyadh; Golden, Teresa Diane, 1963- & Philipose, Usha
Object Type:
Article
System:
The UNT Digital Library
Amplification of photoacoustic effect in bimodal polymer particles by self-quenching of indocyanine green
This article presents a new type of bimodal contrast agent that is based on the self-quenching of indocyanine green (ICG) encapsulated in a biocompatible and biodegradable polymer shell.
Date:
August 23, 2019
Creator:
Mokrousov, Maksim D.; Novoselova, Marina V.; Nolan, Jackie; Harrington, Walter; Rudakovskaya, Polina; Bratashov, Daniil N. et al.
Object Type:
Article
System:
The UNT Digital Library
Persistent spin helix in Rashba-Dresselhaus ferroelectric CsBiNb2O7
Article reporting that CsBiNb₂O₇, a layered perovskite of Dion-Jacobson type, is a robust ferroelectric with sufficiently strong spin-orbit coupling and spin texture reversible by electric field. The study reveals that its topmost valence band's spin texture is quasi-independent from the momentum, as a result of the low symmetry of its ferroelectric phase. The peculiar spin-polarization pattern in the momentum space may yield the so-called “persistent spin helix,” a specific spin-wave mode which protects the spin from decoherence in the diffusive transport regime, potentially ensuring a very long spin lifetime in this material.
Date:
August 19, 2019
Creator:
Sławińska, Jagoda; Autieri, Carmine; Barone, Paolo & Picozzi, Silvia
Object Type:
Article
System:
The UNT Digital Library
Influence of coherent population trapping on Raman scattering
Article considering the Raman scattering in molecular media. Applying two laser fields in a two-photon resonance with vibrational transition, the authors study the role of rotational levels for excitation of vibrational coherence. It is shown that the molecular vibrational coherence strongly depends on the effect of coherent population trapping for rotational levels. The obtained results are important for applications of Raman spectroscopy to molecular detection in engineering, chemical, and biological applications.
Date:
August 8, 2019
Creator:
Singh, Pooja; Rostovtsev, Yuri V.; Patnaik, Anil K.; Roy, Sukesh & Gord, James R.
Object Type:
Article
System:
The UNT Digital Library
Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited]
Article reporting the results of blood cell characterization using label-free fluorescence imaging techniques and flow-cytometry. Autofluorescence parameters of different cell types – white blood cells, red blood cells, erythrophagocytic cells – are assessed and analyzed in terms of molecular heterogeneity and possibilities of differentiation between different cell types in vitro and in vivo.
Date:
July 29, 2019
Creator:
Drachev, Vladimir P.; Yakimov, Boris P.; Gogoleva, Maria A.; Semenov, Alexey N.; Rodionov, Sergey A.; Novoselova, Marina V. et al.
Object Type:
Article
System:
The UNT Digital Library
Classical trajectory Monte Carlo simulation of plasma fueling using magnetic plasma expulsion
Article describes a study exploring the possibility of fueling a magnetically confined plasma using particle sources located inside of the plasma.
Date:
July 11, 2019
Creator:
Martinez, Armando & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
AFLOW-QHA3P: Robust and automated method to compute thermodynamic properties of solids
Article introducing the quasiharmonic approximation three-phonon method to calculate the thermodynamic properties of both nonmetallic and metallic compounds. This study demonstrates that QHA3P is an ideal framework for the high-throughput prediction of finite-temperature material properties, combining the accuracy of QHA with the computational efficiency of SC-QHA.
Date:
July 8, 2019
Creator:
Nath, Pinku; Usanmaz, Demet; Hicks, David; Oses, Corey; Fornari, Marco; Buongiorno Nardelli, Marco et al.
Object Type:
Article
System:
The UNT Digital Library
Lattice quantum magnetometry
Article presenting the idea of lattice quantum magnetometry, i.e., quantum sensing of magnetic fields by a charged (spinless) particle placed on a finite two-dimensional lattice.
Date:
June 24, 2019
Creator:
Razzoli, Luca; Ghirardi, Luca; Siloi, Ilaria; Bordone, Paolo & Paris, Matteo G. A.
Object Type:
Article
System:
The UNT Digital Library
Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field
This article describes a procedure for computing the electrostatic equilibria of non-neutral plasmas in a Penning trap with a nonuniform magnetic field by solving Poisson's equation using an iterative method. Plasma equilibria in a model Penning trap with high and low field regions are computed. The plasma is assumed to follow the Boltzmann density distribution along magnetic field lines.
Date:
May 21, 2019
Creator:
Lane, Ryan A. & Ordonez, Carlos A.
Object Type:
Article
System:
The UNT Digital Library
Formation and characterization of embedded Fe3Si binary structures in Si
Article studying chemical and electronic properties of ion beam synthesized Fe-Si binary structures using X-ray photoelectron spectroscopy binding energy analysis.
Date:
May 16, 2019
Creator:
Lakshantha, Wickramaarachchige J.; McDaniel, Floyd Del. (Floyd Delbert), 1942- & Rout, Bibhudutta
Object Type:
Article
System:
The UNT Digital Library
Coordination corrected ab initio formation enthalpies
Article proposes the “coordination corrected enthalpies” method (CCE), based on the number of nearest neighbor cation–anion bonds, and also capable of correcting relative stability of polymorphs.
Date:
May 15, 2019
Creator:
Friedrich, Rico; Usanmaz, Demet; Oses, Corey; Supka, Andrew; Fornari, Marco; Buongiorno Nardelli, Marco et al.
Object Type:
Article
System:
The UNT Digital Library
Polarization in electrostatics and circuits: Computing and visualizing surface charge distributions
Article describing an algorithm or computing the detailed surface charge distributions in equilibrium electrostatic situations and in steady-state DC circuits, and discuss the results of the computations of surface charge distributions for several systems.
Date:
December 14, 2018
Creator:
Chabay, Ruth & Sherwood, Bruce
Object Type:
Article
System:
The UNT Digital Library
Dual-Band High Efficiency Terahertz Meta-Devices Based on Reflective Geometric Metasurfaces
Article proposing a novel reflective building block (unit cell) to work at two arbitrary terahertz frequency bands with independent phase control at each band.
Date:
April 18, 2019
Creator:
Lin, Yuankun; Wang, Tailei; Xie, Rensheng; Zhu, Shouzheng; Gao, Jianjun; Xin, Mingbo et al.
Object Type:
Article
System:
The UNT Digital Library
Topology of Black Holes’ Horizons
Article exploring the topology of black holes.
Date:
April 3, 2019
Creator:
Tozzi, Arturo & Peters, James F.
Object Type:
Article
System:
The UNT Digital Library
Fe/GeTe(111) heterostructures as an avenue towards spintronics based on ferroelectric Rashba semiconductors
Article investigating the electronic structure of Fe/GeTe(111), a prototypical ferromagnetic/Rashba-ferroelectric interface, by performing density functional theory and Green's functions calculations complemented by x-ray photoemission spectroscopy.
Date:
February 19, 2019
Creator:
Sławińska, Jagoda; Di Sante, Domenico; Varotto, Sara; Rinaldi, Christian & Picozzi, Silvia
Object Type:
Article
System:
The UNT Digital Library
New mechanism of plasmons specific for spin-polarized nanoparticles
This article experimentally shows that Co nanoparticles with a single-domain crystal structure support a plasmon resonance at approximately 280 nm with better quality than gold nanoparticle resonance in the visible. The magnetic nature of these nanoparticles suggests a new type of these plasmons.
Date:
March 27, 2018
Creator:
Bhatta, Hari L.; Aliev, Abil E. & Drachev, Vladimir P.
Object Type:
Article
System:
The UNT Digital Library
Giant spin Hall effect in two-dimensional monochalcogenides
This article, using calculations from first principles, reveals for the first time giant intrinsic spin Hall conductivities (SHC) in these materials. In particular, the article shows that the SHC resonances can be easily tuned by combination of strain and doping and, in some cases, strain can be used to induce semiconductor to metal transition that makes a giant spin Hall effect possible even in absence of doping.
Date:
October 30, 2018
Creator:
Sławińska, Jagoda; Cerasoli, Frank T.; Wang, Haihang; Postorino, Sara; Supka, Andrew; Curtarolo, Stefano et al.
Object Type:
Article
System:
The UNT Digital Library
Electrodynamics of superlattices with ultra-thin metal layers: quantum Landau damping and band gaps with nonzero density of states
This article develops a theory of electromagnetic transmission through dielectric-metal superlattices with ultra-thin metal films, in which electron motion in the direction perpendicular to the metal surfaces is quantized.
Date:
October 16, 2018
Creator:
Castillo-López, S. G.; Krokhin, Arkadii A.; Makarov, N. M. & Pérez-Rodríguez, F.
Object Type:
Article
System:
The UNT Digital Library