Abstract: The present invention relates to a method for making a novel cathode employing a monoclinic sulfur phase that enables a single plateau lithium-sulfur reaction in, for example, a carbonate electrolyte system. The cathode is applicable to a variety of other types of anodes. The method produces a cathode suitable for use in an electrode of a cell or battery by depositing monoclinic phase sulfur via vapor deposition onto a substrate in a sealed vapor deposition apparatus.
Abstract: The present disclosure provides imaging agents that are useful for the detection and evaluation of heart conditions, such as myocardial infarction. Upon activation, the imaging agents of the present disclosure may be detected using an ultrasound imaging device.
Type:
Grant
Filed:
April 24, 2020
Date of Patent:
April 20, 2021
Assignee:
Drexel University
Inventors:
Steven Wrenn, Brett Angel, Andrew Kohut, Aaron Fafarman, Michael Cimorelli
Abstract: A reactive jamming software defined radio (SDR) apparatus to target Frequency Hopping Spread-Spectrum (FHSS) signals includes a peripheral module for SDR processing; a reactive jamming hardware IP core that implements time-sensitive operations on a field programmable gate array (FGPA); and a host computer that implements non-time-critical operations, such as jammer configuration, logging, and strategy composition.
Type:
Grant
Filed:
February 25, 2019
Date of Patent:
April 20, 2021
Assignee:
Drexel University
Inventors:
Danh H. Nguyen, Marko Jacovic, Cem Sahin, Kapil R. Dandekar
Abstract: A nanofiber mat comprises metal oxide nanoparticles distributed on surface of metal oxide nanofibers, wherein the nanofiber mat has a surface area at least 150 m2/g, and the metal oxide is selected from titanium monoxide TiOx, wherein 0.65<x<1.25, niobium monoxide NbOx, wherein 0.982<x<1.008, vanadium (II) oxide VOx, wherein 0.79 <x <1.29, iron (II) oxide FexO, wherein 0.833<x<0.957, manganese (II) oxide MnxO, wherein 0.848<x<1.000, titanium suboxide, TiOnO2n-1, wherein n>1, molybdenum suboxide, MonO3n-1, wherein n>1, MonO3n-2, wherein n>1, and vanadium suboxide, VnO2n-1, wherein n>1. Cathodes, anodes and batteries are made using the nanofiber mat. Processes for producing the metal oxide nanofiber mat and an electrode including it are also provided.
Abstract: A method for generation of material in a liquid phase comprising a step of subjecting the liquid phase to a nanosecond-pulsed discharge plasma.
Abstract: A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10?5 Torr to 1×10?7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.
Type:
Application
Filed:
December 10, 2020
Publication date:
April 8, 2021
Applicant:
DREXEL UNIVERSITY
Inventors:
Mitra Lenore Taheri, Katie Jo Sunday, Steven Richard Spurgeon, Steven Joseph May
Abstract: A free-standing electrically conductive porous structure suitable to be used as a cathode of a battery, including an electrically conductive porous substrate with sulfur diffused into the electrically conductive porous substrate to create a substantially uniform layer of sulfur on a surface of the electrically conductive porous substrate. The free-standing electrically conductive porous structure has a high performance when used in a rechargeable battery. A method of manufacturing the electrically conductive porous structure is also provided.
Abstract: Performance improvement of an all-optical analog-to-digital converter (AOADC) addresses both RF and optical modeling of a leaky waveguide based optical spatial light modulator (SLM) using electro-optic (E-O) material. The E-O polymer provides improved sensitivity for SLM and achieves a broader bandwidth due to better velocity matching between RF and optical waves.
Abstract: A right ventricle-pulmonary artery conduit provides a first end having a first disc extending radially therefrom and a second disc, proximate to the first disc. The second disc extends radially from the first end. An expandable lumen section extends between the first disc and the second disc. The conduit also has a second end, distal from the first end.
Type:
Application
Filed:
September 13, 2020
Publication date:
March 18, 2021
Applicant:
Drexel University
Inventors:
Randy Michael Stevens, Achintya Moulick, Vicki Mahan, Amy L. Throckmorton
Abstract: This invention relates to a chemiresistor gas sensor using MXene and a method of manufacturing the same, wherein the chemiresistor gas sensor, manufactured in a manner in which a Ti3C2Tx MXene thin film is formed and transferred onto a sensor substrate, can exhibit good response and sensitivity.
Type:
Grant
Filed:
January 16, 2018
Date of Patent:
March 16, 2021
Assignees:
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, DREXEL UNIVERSITY
Inventors:
Hee-Tae Jung, Seon Joon Kim, Hyeong-Jun Koh, Yury Gogotsi
Abstract: The present invention is directed to an ultrasound device for use in implementing therapeutic treatments and transdermal analyte delivery. The device includes a piezoelectric transducer that efficiently and safely converts electrical energy to ultrasonic waves, and has a unique structure including a piezoelectric element positioned between two opposing, flexible concave covers. The device may be used for various therapeutic purposes including wound healing, tissue stimulation and transdermal analyte delivery. The invention is further directed to a novel analyte delivery system including the ultrasound device and an encapsulated analyte.
Type:
Application
Filed:
October 16, 2020
Publication date:
February 25, 2021
Applicant:
DREXEL UNIVERSITY
Inventors:
Peter A. Lewin, Elizabeth S. S. Papazoglou, Youhan Sunny, Chris R. Bawiec, Leonid Zubkov, An Nguyen, Joshua Samuels
Abstract: A planar (two-dimensional, XY location) touch sensor may include a knitted structure and supplementary method of sensing detects human touch on a fabric surface. This sensor may be fully knitted and detect the continuous planar location and contact force of human touch along the surface of the structure. The fabric may conform to any arbitrary surface and may be a rectangle for touch pad applications. This sensor may be used for applications that include robotics and human-machine interaction, smart garments and wearables, as well as medical textiles and flexible embedded sensors. This touch sensor may require as few as only two electrode connections from the fabric to sense both planar touch and pressure, which allows it to work in areas with limited space that allow for limited complexity for wiring.
Type:
Application
Filed:
October 30, 2020
Publication date:
February 18, 2021
Applicant:
Drexel University
Inventors:
Richard James Vallett, Ryan David Young, Robert Wallace Lehrich, Christina Dickinson Kara, Genevieve Dion, Youngmoo Edmund Kim
Abstract: A key based technique that targets obfuscation of critical circuit parameters of an analog circuit block by masking physical characteristics of a transistor (width and length) and the circuit parameters reliant upon these physical characteristics (i.e. circuit biasing conditions, phase noise profile, bandwidth, gain, noise figure, operating frequency, etc.). The proposed key based obfuscation technique targets the physical dimensions of the transistors used to set the optimal biasing conditions. The widths and/or lengths of a transistor are obfuscated and, based on an applied key sequence, provides a range of potential biasing points. Only when the correct key sequence is applied and certain transistor(s) are active, are the correct biasing conditions at the target node set.
Type:
Grant
Filed:
March 12, 2018
Date of Patent:
February 16, 2021
Assignee:
Drexel University
Inventors:
Ioannis Savidis, Vaibhav Venugopal Rao, Kyle Juretus
Abstract: Modern integrated circuits have an increasing need for various levels of both supply voltage (V) and operating frequency (f) available at fine spatial and temporal granularity. This work introduces a solution that provides a number and quality of locally distributed V/f domains through FOPAC. Opportunistically sharing design resources and features between multi-phase voltage regulators (MPVRs) and resonant rotary clocks (ReRoCs) enabling i) the scalability to hundreds of domains, ii) fast switching times for both voltage and frequency, leading to temporal flexibility, and iii) locally distributed designs, leading to spatial flexibility.
Type:
Application
Filed:
May 29, 2020
Publication date:
February 4, 2021
Applicants:
Drexel University, University of South Florida
Inventors:
Baris Taskin, Ragh Kuttappa, Selcuk Kose
Abstract: Applications of dielectric barrier discharge (DBD) based atmospheric pressure plasma jets are often limited by the relatively small area of treatment due to their 1D configuration. This system generates 2D plasma jets permitting fast treatment of larger targets. DBD evolution starts with formation of transient anode glow, and continues with development of cathode-directed streamers. The anode glow can propagate as an ionization wave along the dielectric surface through and outside of the discharge gap. Plasma propagation is not limited to 1D geometry such as tubes, and can be organized in a form of a rectangular plasma jet, or other 2D or 3D shapes. Also described are a method for generating 2D plasma jets and use of the 2D plasma jets for cancer therapy.
Type:
Application
Filed:
February 20, 2019
Publication date:
January 28, 2021
Applicants:
Drexel University, Thomas Jefferson University
Inventors:
Danil V. DOBRYNIN, Alexander FRIDMAN, Abraham LIN, Vandana MILLER, Adam Snook
Abstract: The present invention is directed to photovoltaic and photogalvanic devices and methods of generating electrical energy and power or detecting light therefrom, based on a novel nano-enhanced bulk photovoltaic effect using non-centrosymmetric crystals, including ferroelectric and piezoelectric materials, where the non-centrosymmetry is the equilibrium state or it is static or dynamically induced. In certain embodiments, the device comprises a layer of non-centrosymmetric crystalline materials, and a plurality of electrodes disposed in an array upon or penetrating into at least one surface of the crystalline material, the electrodes being optimally spaced to capture the ballistic carriers generated upon irradiation of the crystalline material.
Type:
Grant
Filed:
July 30, 2018
Date of Patent:
January 26, 2021
Assignees:
Drexel University, The Trustees of the University of Pennsylvania
Inventors:
Jonathan E. Spanier, Vladimir M. Fridkin, Alessia Polemi, Andrew M. Rappe
Abstract: A state machine system on a chip presents hidden state transitions to create IC knowledge not available in a logical netlist and temporal key dependencies to increase the difficulty of executing the SAT attack. The change in the state space of a circuit over time may be used to increase circuit security. Hidden transitions that are frequency dependent, state dependent keys, and temporally dependent transition keys may be used as ways to increase security against SAT based attacks.
Abstract: A spiral flow-inducing exo-graft is a non-blood contacting helically shaped device that wraps around the outside of a blood-carrying conduit and manipulates hemodynamic flow-patterns. The blood-carrying conduit can be a natural tissue blood vessel or an artificial graft.
Type:
Application
Filed:
July 9, 2020
Publication date:
January 14, 2021
Applicant:
Drexel University
Inventors:
J. Yasha Kresh, Pablo Huang Zhang, Colin Tkatch
Abstract: Phase change material modules for use in a heat exchanger are described. The phase change material module comprises two or more set of a plurality of substantially aligned hollow structures arranged to form a porous structure. A phase change material capable of undergoing a phase change as a result of heat exchange between it and a fluid is housed within the hollow tubes. Also described is a phase change material module with hollow tubes having a cross-sectional area through the phase change material selected from elliptical, rectangular, stadium-shaped, teardrop-shaped, airfoil-shaped, rounded rectangle and ovoid. A heat exchanger comprising a plurality of the phase change material modules, a first fluid inlet and outlet, and a second fluid inlet and outlet, wherein the phase change material modules are repeated circulated from alignment with the first fluid inlet and the second fluid inlet is also described.
Type:
Grant
Filed:
September 15, 2016
Date of Patent:
January 12, 2021
Assignee:
Drexel University
Inventors:
Ying Sun, Matthew McCarthy, Young I. Cho, Philipp Boettcher, Han Hu, Baolan Shi, Qinghua Xie, Kent Zammit
Abstract: The fiber optic probe detects changes in ultrasound pressure in an immersion medium such as a liquid, a gas, or a solid, where the system includes an optical fiber probe having a fiber of the probe has a highly doped (or regular) core with a diameter in the range 5 to 10 ?m and a clad diameter equal to or more than 50 ?m; and the optical fiber tip has been modified in a D-shaped (or V-shaped) structure where the clad material has been removed from one side of the cylindrical fiber to the surface of the fiber core; then, this modified region of the fiber is coated, with a very thin layer of a metallic material, ranging from 3 to 10 nm.
Type:
Grant
Filed:
November 5, 2019
Date of Patent:
January 5, 2021
Assignee:
Drexel University
Inventors:
Mahmoud A. El-Sherif, Afshin S. Daryoush, Peter A. Lewin, Rupa Gopinath Minasamudram