Badawi F Dweik

US Patent:

20070146971, Jun 28, 2007

Filed:

Dec 22, 2005

Appl. No.:

11/316416

Inventors:

Badawi Dweik - Foxboro MA, US
John Forchione - Ashland MA, US
Mourad Manoukian - Watertown MA, US
John Kosek - Danvers MA, US
Anthony LaConti - Lynnfield MA, US
David Evans - Seekonk MA, US

International Classification:

H01G 9/04

US Classification:

361532000

Abstract:

A high-voltage electrochemical-electrolytic capacitor. The capacitor includes a cathode comprising a plurality of electrically-conductive particles in intimate electrical contact with one another and disposed in a proton-conductive, electrically-non-conductive, solid ionomer matrix. The capacitor also includes an anode comprising a plurality of electrically-conductive particles in intimate electrical contact with one another and disposed in a proton-conductive, electrically-non-conductive solid ionomer matrix, the electrically-conductive particles of the anode differing in composition from the electrically-conductive particles of said cathode. The capacitor further includes a proton-conducting dielectric positioned between and in contact with each of the cathode and the anode, the proton-conducting dielectric comprising a solid ionomer. Preferably, the capacitor is assembled by constructing a first portion and a second portion, the first portion comprising the cathode and an extra thickness of solid ionomer on its inner surface, the second portion comprising the anode and an extra thickness of solid ionomer on its inner surface. When the first and second portions are brought together, the extended thicknesses of the solid ionomer jointly form the proton-conducting dielectric.

US Patent:

20120103823, May 3, 2012

Filed:

Oct 11, 2011

Appl. No.:

13/317151

Inventors:

Badawi M. Dweik - Foxboro MA, US
Gwendolynne Merlen - Somerville MA, US
Linda A. Tempelman - Lincoln MA, US

International Classification:

G01N 27/403
C25B 15/02
G01N 27/26

US Classification:

205335, 204406, 204242, 205780

Abstract:

Method for electrochemically detecting different oxidant and halide anion species in a sample. According to one embodiment, the method uses a sensor including a boron-doped diamond working electrode, a platinum mesh counter electrode, a silver/silver chloride reference electrode, a potentiostat coupled to the three electrodes, and a computer coupled to the potentiostat. The sensor measures current resulting from differential pulse non-stripping voltammetry, thereby enabling different oxidants and halide anions from a plurality of such species to be detected by distinct responses. Peaks in the current signal result at characteristic voltages when a species is oxidized to a higher oxidation state, and the concentration of a particular species is determined by the magnitude of the current peak. The sensor response time is rapid and shows high sensitivity and selectivity for oxidants and halide anions. The sensor may be a hand-held or in-line device and may be used in a feedback-control system.

US Patent:

20230048049, Feb 16, 2023

Filed:

Aug 12, 2022

Appl. No.:

17/887347

Inventors:

- Newton MA, US
Muhit Rana - Southborough MA, US
Badawi M. Dweik - Foxborough MA, US
Niazul I. Khan - Westmont IL, US
Andrew Weber - Medford MA, US

International Classification:

G01N 27/06
G01N 33/94
G01N 33/543

Abstract:

Method and system for detecting drug and/or drug metabolites in a liquid sample, such as a wastewater sample. According to one embodiment, the method involves providing a device that includes a graphene field effect transistor and a first aptamer coupled to the graphene field effect transistor in a first well, the first aptamer being selective for a first drug or drug metabolite. Next, a liquid sample is introduced to the first aptamer of the device. Next, a sweeping liquid gate voltage is applied to the device to obtain a resistance versus liquid gate voltage plot for the device. Next, the Dirac voltage shift, if any, in the liquid gate voltage plot for the device is used to determine the presence and/or quantity of the drug or drug metabolite. Additional aptamers selective for different drugs or drug metabolites of interest may also be included in other wells of the device.

US Patent:

20200397340, Dec 24, 2020

Filed:

Feb 11, 2020

Appl. No.:

16/788035

Inventors:

- Newton MA, US
Badawi M. Dweik - Foxborough MA, US

International Classification:

A61B 5/08
A61K 31/352
A61B 5/18
G01N 27/327
G01N 27/30
G01N 27/333

Abstract:

Method and system for detecting and/or quantifying Δ-tetrahydrocannibinol (THC) in exhaled breath. In one embodiment, the method involves providing an electrochemical sensing element, the electrochemical sensing element including a working electrode, and also providing a filter that traps THC in exhaled breath. Next, a subject exhales onto the filter, whereby at least some of the THC, if present, is trapped in the filter. Next, the filter is washed with an eluent, whereby at least some of the THC trapped in the filter is eluted in an eluate. Next, the eluate is deposited onto the working electrode of the electrochemical sensing element, and the eluate is dried, whereby any THC present is immobilized on the working electrode. Next, an electrolytic solution is delivered to the electrochemical sensing element, and the THC immobilized on the working electrode is directly electrochemically detected and/or quantified using a pulse voltammetry technique, such as square-wave voltammetry.