scholarly journals Crystal Engineering and Ferroelectricity at the Nanoscale in Epitaxial 1D Manganese Oxide on Silicon

Nanoscale ◽  
2021 ◽  
Author(s):  
Andres Gomez ◽  
José M. Vila-Fungueiriño ◽  
Claire Jolly ◽  
Ricardo Garcia ◽  
Judith Oró-Solé ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Crystal Engineering ◽  
Tunnel Junctions ◽  
Electronic Devices ◽  
Monolithic Integration ◽  
Nonvolatile Memories ◽  
Wide Range ◽  
Ferroelectric Oxides

Ferroelectric oxides have attracted much attention due to their wide range of applications, especially in electronic devices such as nonvolatile memories and tunnel junctions. As a result, the monolithic integration...

Pharmaceutical Co-Crystals - Design, Development and Applications

2020 ◽  
Vol 10 (3) ◽  
pp. 169-184
Author(s):  
Rachna Anand ◽  
Arun Kumar ◽  
Arun Nanda
Keyword(s):  
Physicochemical Properties ◽  
Crystal Engineering ◽  
Pharmacological Action ◽  
Physicochemical Characteristics ◽  
Research Area ◽  
Dissolution Profile ◽  
Design Development ◽  
Drug Molecule ◽  
Wide Range ◽  
Major Factors

Background: Solubility and dissolution profile are the major factors which directly affect the biological activity of a drug and these factors are governed by the physicochemical properties of the drug. Crystal engineering is a newer and promising approach to improve physicochemical characteristics of a drug without any change in its pharmacological action through a selection of a wide range of easily available crystal formers. Objective: The goal of this review is to summarize the importance of crystal engineering in improving the physicochemical properties of a drug, methods of design, development, and applications of cocrystals along with future trends in research of pharmaceutical co-crystals. Co-crystallization can also be carried out for the molecules which lack ionizable functional groups, unlike salts which require ionizable groups. Conclusion: Co-crystals is an interesting and promising research area amongst pharmaceutical scientists to fine-tune the physicochemical properties of drug materials. Co-crystallization can be a tool to increase the lifecycle of an older drug molecule. Crystal engineering carries the potential of being an advantageous technique than any other approach used in the pharmaceutical industry. Crystal engineering offers a plethora of biopharmaceutical and physicochemical enhancements to a drug molecule without the need of any pharmacological change in the drug.

scholarly journals Towards an accurate description of perovskite ferroelectrics: exchange and correlation effects

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Simuck F. Yuk ◽  
Krishna Chaitanya Pitike ◽  
Serge M. Nakhmanson ◽  
Markus Eisenbach ◽  
Ying Wai Li ◽  
...  
Keyword(s):  
Density Functional ◽  
General Purpose ◽  
Correlation Effects ◽  
Lattice Constants ◽  
Bulk Solids ◽  
Wide Range ◽  
Exchange Enhancement ◽  
Experimental Values ◽  
Similar Accuracy ◽  
Ferroelectric Oxides

Abstract Using the van der Waals density functional with C09 exchange (vdW-DF-C09), which has been applied to describing a wide range of dispersion-bound systems, we explore the physical properties of prototypical ABO 3 bulk ferroelectric oxides. Surprisingly, vdW-DF-C09 provides a superior description of experimental values for lattice constants, polarization and bulk moduli, exhibiting similar accuracy to the modified Perdew-Burke-Erzenhoff functional which was designed specifically for bulk solids (PBEsol). The relative performance of vdW-DF-C09 is strongly linked to the form of the exchange enhancement factor which, like PBEsol, tends to behave like the gradient expansion approximation for small reduced gradients. These results suggest the general-purpose nature of the class of vdW-DF functionals, with particular consequences for predicting material functionality across dense and sparse matter regimes.

scholarly journals Wide range frequency tuning in vacuum electronic devices

2003 ◽  
Author(s):  
V.G. Baryshevsky ◽  
K.G. Batrakov ◽  
N.A. Belous ◽  
A.A. Gurinovich ◽  
A.S. Lobko ◽  
...  
Keyword(s):  
Frequency Tuning ◽  
Electronic Devices ◽  
Wide Range ◽  
Vacuum Electronic Devices

scholarly journals Cocrystals of Ethenzamide With 2-Nitrobenzoic Acid - Conformational Analysis, MD Simulations And DFT Investigations

2021 ◽  
Author(s):  
Y. Sheena Mary ◽  
Y. Shyma Mary ◽  
Razieh Razavi
Keyword(s):  
Hydrogen Bond ◽  
Conformational Analysis ◽  
Crystal Engineering ◽  
Energy Charge ◽  
Thermodynamic Characteristics ◽  
Md Simulations ◽  
Pharmaceutical Chemistry ◽  
Nitrobenzoic Acid ◽  
Wide Range ◽  
Stability Energy

Abstract In crystal engineering and pharmaceutical chemistry, cocrystals have a wide range of applications. Ethenzamide (EA) is found to form cocrystal with 2-nitrobenzoic acid (NBA). Geometry properties like stability energy, charge distribution, bond length, electronic properties and thermodynamic characteristics have been analyzed. The C-H…O hydrogen bond involves C-H of EA and oxygen of NBA. Configuration with the angle, N3-C4-C5-C6 gives the lowest energy conformation. Partition coefficient value suggests that EA-NBA has pharmaceutics behavior. RMSD values show the simulation’s relative stability and the complexes, remained stable throughout.

The role of imaging tests in electrotherapy

2020 ◽  
Vol 1 (54) ◽  
pp. 23-29
Author(s):  
Łukasz Mazurek ◽  
Agnieszka Kotalczyk ◽  
Michał Mazurek ◽  
Ewa Jędrzejczyk-Patej
Keyword(s):  
Sensitivity And Specificity ◽  
Therapeutic Process ◽  
Electronic Devices ◽  
Diagnosis And Treatment ◽  
Imaging Methods ◽  
Cardiac Implantable Electronic Devices ◽  
Wide Range

We currently have a wide range of different imaging tests that are constantly improving and developing. Each test has its sensitivity and specificity and is used in various fields of medicine. Knowledge of the possibilities of using imaging tests in electrotherapy is an important element of the diagnostic and therapeutic process. This article presents selected issues regarding the use of imaging methods in the diagnosis and treatment of patients with cardiac implantable electronic devices.

PSK Transciever designing using SystemVue

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Deepali Chaurasia
Keyword(s):  
Signal Processing ◽  
System Integration ◽  
Communication Systems ◽  
Energy Savings ◽  
Electronic Devices ◽  
Physical Space ◽  
Electronic System ◽  
System Level ◽  
Complex Nature ◽  
Wide Range

Since, the industrial electronics is trending towards more compact components and system integration, innovative products offering greater flexibility, quality, safety, reliability, energy savings, wide range of connectivity with long operating lifetime. Now, Electronics is widely used in information processing, telecommunication and signal processing. Due to the complex nature of electronics theory, laboratory experimentation is an important part of development of electronic devices. These experiments are used to test or verify the proposed design and detect errors. Historically, electronics labs have consisted of electronic devices and equipment located in the physical space. Although in more recent years, the trend has been towards electronics lab simulation softwares and SystemVue is also one of them. SystemVue is a focussed electronic design automation (EDA) environment for electronic system-level (ESL) design. It enables system architects and algorithm developers to innovate the physical layer (PHY) of wireless and aerospace/defence communication systems and provide unique value to RF, DSP and FPGA/ASIC implementers. As a dedicated platform for ESL design and signal processing realization, SystemVue replaces general-purpose digital, analog and math environments. SystemVue “speaks RF”, cuts PHY development and verification time in half and connects to your mainstream EDA flow.

scholarly journals Synaptic transistors with aluminum oxide dielectrics enabling full audio frequency range signal processing

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sami Bolat ◽  
Galo Torres Sevilla ◽  
Alessio Mancinelli ◽  
Evgeniia Gilshtein ◽  
Jordi Sastre ◽  
...  
Keyword(s):  
Signal Processing ◽  
Aluminum Oxide ◽  
Electronic Devices ◽  
Rapid Evolution ◽  
Future Research ◽  
Acoustic Response ◽  
Oxide Electronics ◽  
Wide Range ◽  
Input Signals ◽  
Chemical Synapses

Abstract The rapid evolution of the neuromorphic computing stimulates the search for novel brain-inspired electronic devices. Synaptic transistors are three-terminal devices that can mimic the chemical synapses while consuming low power, whereby an insulating dielectric layer physically separates output and input signals from each other. Appropriate choice of the dielectric is crucial in achieving a wide range of operation frequencies in these devices. Here we report synaptic transistors with printed aluminum oxide dielectrics, improving the operation frequency of solution-processed synaptic transistors by almost two orders of magnitude to 50 kHz. Fabricated devices, yielding synaptic response for all audio frequencies (20 Hz to 20 kHz), are employed in an acoustic response system to show the potential for future research in neuro-acoustic signal processing with printed oxide electronics.

scholarly journals High pressure studies of L-Serine-L-Ascorbic acid co-crystal

2014 ◽  
Vol 70 (a1) ◽  
pp. C988-C988
Author(s):  
Sergey Arkhipov ◽  
Boris Zakharov ◽  
Elena Boldyreva
Keyword(s):  
High Pressure ◽  
Ascorbic Acid ◽  
Hydrogen Bonds ◽  
Single Crystal ◽  
Crystal Engineering ◽  
Mixed Crystals ◽  
Study Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wide Range

"Experiments for studying crystalline materials under extreme conditions are a powerful tool for investigating ""structure-property"" relationships. They also give information on the behavior of hydrogen bonds and are important both for materials science and crystal engineering. In addition, many processes in the living organisms are also related to mechanical stress. One of the most interesting tasks is to identify factors which influence the stability of a structure, or a part of the structure, at high pressure. Experiments on the systematic study of compounds in a wide range of pressures allow us to accumulate data that can be used to solve this problem. For a more complete picture, the mixed crystals of the selected compound are studied. Investigation of mixed crystals and cocrystals of interest can be compared with the crystals of individual compounds. We have chosen the structure of L-serine - L-ascorbic acid to be compared with those of L-serine and L-ascorbic acids for such a study. Phase transitions were previously reported to be induced by increasing pressure in both L-serine [1] and L-ascorbic acid [2]; moreover, the structure of L-serine was followed at multiple pressures by single-crystal and powder X-ray diffraction[3]. L-serine – L-ascorbic acid co-crystal was studied in the pressure range 0-5.4 GPa (at multiple points at every 0.5-0.7 GPa) by single-crystal X-ray diffraction and Raman spectroscopy. A phase transition has been detected and some rearrangement in the network of hydrogen bonds was observed. The high pressure data were compared with those for the individual structures of the L-serine and L-ascorbic acid. This work was supported by RFBR (grants 12–03-31541, 14-03-31866, 13-03-92704, 14-03-00902 ), Ministry of Science and Education of Russia and Russian Academy of Sciences."

High-quality epitaxial NbN/AlN/NbN tunnel junctions with a wide range of current density

2013 ◽  
Vol 102 (14) ◽  
pp. 142604 ◽  
Author(s):  
Z. Wang ◽  
H. Terai ◽  
W. Qiu ◽  
K. Makise ◽  
Y. Uzawa ◽  
...  
Keyword(s):  
Current Density ◽  
Tunnel Junctions ◽  
High Quality ◽  
Wide Range

Versatile variable temperature insert at the DEIMOS beamline forin situelectrical transport measurements

2016 ◽  
Vol 23 (3) ◽  
pp. 652-657 ◽  
Author(s):  
L. Joly ◽  
B. Muller ◽  
E. Sternitzky ◽  
J.-G. Faullumel ◽  
A. Boulard ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Electrical Transport ◽  
Tunnel Junctions ◽  
Variable Temperature ◽  
Electronic Devices ◽  
X Ray ◽  
In Operando ◽  
X Ray Absorption ◽  
Multifunctional Properties

The design and the first experiments are described of a versatile cryogenic insert used for its electrical transport capabilities. The insert is designed for the cryomagnet installed on the DEIMOS beamline at the SOLEIL synchrotron dedicated to magnetic characterizations through X-ray absorption spectroscopy (XAS) measurements. This development was spurred by the multifunctional properties of novel materials such as multiferroics, in which, for example, the magnetic and electrical orders are intertwined and may be probed using XAS. The insert thus enables XAS toin situprobe this interplay. The implementation of redundant wiring and careful shielding also enables studies on operating electronic devices. Measurements on magnetic tunnel junctions illustrate the potential of the equipment toward XAS studies ofin operandoelectronic devices.

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