Mohammad Nazrul Islam

US Patent:

20200384602, Dec 10, 2020

Filed:

Jun 10, 2019

Appl. No.:

16/435963

Inventors:

- Newark DE, US
Mohammad T. Islam - New Castle DE, US
Youngrae Park - Wilmington DE, US
George C. Jacob - Newark DE, US

International Classification:

B24B 37/24
C08L 27/18
C08F 214/26
B24B 37/005
B24B 37/22
C09G 1/02

Abstract:

The invention provides a method for polishing or planarizing a substrate. First, the method comprises attaching a polymer-polymer composite polishing pad to a polishing device. The polishing pad has a polymer matrix and fluoropolymer particles embedded in the polymeric matrix. The fluoropolymer particles have a zeta potential more negative than the polymeric matrix. Cationic particle-containing slurry is applied to the polishing pad. Conditioning the polymer-polymer composite polishing pad exposes the fluoropolymer particles to the polishing surface and creates fluoropolymer-containing debris particles in the slurry. Polishing or planarizing the substrate with the increased electronegativity from the fluoropolymer at the polishing surface and in the fluoropolymer-containing debris particles stabilizes the cationic particle-containing slurry to decreases the precipitation rate of the cationic particle-containing slurry.

US Patent:

20170102332, Apr 13, 2017

Filed:

Mar 23, 2015

Appl. No.:

15/128149

Inventors:

- Philadelphia PA, US
Mohammad A. ISLAM - Broomall PA, US
Andrew Marshall RAPPE - Penn Valley PA, US

International Classification:

G01N 21/64
G01N 21/76

Abstract:

The present disclosure pertains to the use of intense, narrow-linewidth surface, chemically-switchable ultraviolet photoluminescence from radiative recombination of the two-dimensional electron liquid with photo-excited holes in complex oxide heterostructures, such as LaAlO/SrTiO(LAO/STO). Such photoluminescence from the interface between the upper and lower layers can be suppressed and restored reversibly under oxidizing and reducing conditions, respectively, as induced by chemisorption and reversal of chemisorption on the exposed surface of the heterostructure's upper member. Making use of this chemically-switchable ultraviolet photoluminescence, the present disclosure provides, inter alia, systems for detection of a chemical species, methods for determining the absence or presence of a chemical species in a sample, optoelectronic devices, and methods for producing optoelectronic devices.

US Patent:

20170098713, Apr 6, 2017

Filed:

Sep 30, 2016

Appl. No.:

15/281406

Inventors:

Zongquan Gu - Chalfont PA, US
Mohammad Anwarul Islam - Warners NY, US
Jonathan Eli Spanier - Bala Cynwyd PA, US

International Classification:

H01L 29/78
H01L 29/778
H01L 29/775
H01L 29/49
H01L 27/115

Abstract:

Coupling of switchable ferroelectric polarization with the carrier transport in an adjacent semiconductor enables a robust, non-volatile manipulation of the conductance in a host of low-dimensional systems, including the two-dimensional electron liquid that forms at the LaAlO-SrTiOinterface. However, the strength of the gate-channel coupling is relatively weak, limited in part by the electrostatic potential difference across a ferroelectric gate. Compositionally grading of PbZrTiOferroelectric gates enables a more than twenty-five-fold increase in the LAO/STO channel conductance on/off ratios. Incorporation of polarization gradients in ferroelectric gates can enable significantly enhanced performance of ferroelectric non-volatile memories.

US Patent:

20150247124, Sep 3, 2015

Filed:

Jul 24, 2013

Appl. No.:

14/417273

Inventors:

- New York NY, US
Sarah Xuelian Huang - New York NY, US
Ya-Wen Chen - New York NY, US
Jahar Bhattacharya - New York NY, US
Mohammad Naeem Islam - Jamaica NY, US

Assignee:

THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK - NEW YORK NY

International Classification:

C12N 5/071
G01N 33/50
G01N 33/68

Abstract:

Embodiments of the present invention are directed to various methods for generating airway and lung progenitors and epithelial cells and three-dimensional anterior foregut spheres, and to populations of cells made using the methods. The airway and lung progenitors and epithelial cells can be used as a model to study diseases that primarily affect airway epithelial cells, and to study human lung development. Methods are also provided for drug screening. Anterior foregut spheres can be used as a model for lung fibrosis.

US Patent:

20150065013, Mar 5, 2015

Filed:

Aug 30, 2013

Appl. No.:

14/014468

Inventors:

- Midland MI, US
- Newark DE, US
Fengji Yeh - Wilmington DE, US
Marty W. DeGroot - Middletown DE, US
Mohammad T. Islam - Newark DE, US
Matthew Richard Van Hanehem - Middletown DE, US
Darrell String - Havre de Grace MD, US
James Murnane - Norristown PA, US
Jeffrey James Hendron - Elkton MD, US
John G. Nowland - Elkton MD, US

International Classification:

B24B 37/24
B24B 37/22
B24B 37/20

US Classification:

451 41, 451533, 451 59

Abstract:

A chemical mechanical polishing pad is provided containing: a polishing layer; a rigid layer; and, a hot melt adhesive bonding the polishing layer to the rigid layer; wherein the polishing layer exhibits a specific gravity of greater than 0.6; a Shore D hardness of 60 to 90; an elongation to break of 100 to 300%; and, a unique combination of an initial hydrolytic stability and a sustained hydrolytic instability.

US Patent:

20150065014, Mar 5, 2015

Filed:

Aug 30, 2013

Appl. No.:

14/014498

Inventors:

- Midland MI, US
- Newark DE, US
Fengji Yeh - Wilmington DE, US
Marty W. DeGroot - Middletown DE, US
Mohammad T. Islam - Newark DE, US
Matthew Richard Van Hanehem - Middletown DE, US
Darrell String - Havre de Grace MD, US
James Murnane - Norristown PA, US
Jeffrey James Hendron - Elkton MD, US
John G. Nowland - Elkton MD, US

International Classification:

B24B 37/24
B24B 37/22
B24B 37/20

US Classification:

451 41, 451 59

Abstract:

A method of chemical mechanical polishing a substrate is provided, including: providing a substrate; providing a chemical mechanical polishing pad, comprising: a polishing layer having a composition and a polishing surface, wherein the composition of polishing layer is selected to exhibit an initial hydrolytic stability; coupled with a sustained hydrolytic instability; a rigid layer having a top surface and a bottom surface; a hot melt adhesive interposed between the base surface of the polishing layer and the top surface of the rigid layer; wherein the hot melt adhesive bonds the polishing layer to the rigid layer; a pressure sensitive platen adhesive layer having a stack side and a platen side; wherein the stack side of the pressure sensitive platen adhesive layer is adjacent to the bottom surface of the rigid layer; and, creating dynamic contact between the polishing surface and substrate to polish a surface of the substrate.

US Patent:

20120130627, May 24, 2012

Filed:

Nov 23, 2010

Appl. No.:

12/953141

Inventors:

Mohammad R. Islam - Dix Hills NY, US
Rakibul Islam - Elmhurst NY, US

International Classification:

G06F 17/00

US Classification:

701300

Abstract:

A system, method and computer program are provided for dispatching taxis. A list of the closest, available taxis is sent to a customer. The customer selects at least one taxi in the list that is to receive a travel request. After one of the taxis has accepted the travel request, a display is provided which indicates the location of the customer and the location of a taxi which has accepted the travel request. Updated location information is periodically submitted to determine updated locations for the customer and taxi throughout the pendency of the travel request.

US Patent:

20100247381, Sep 30, 2010

Filed:

Jun 3, 2010

Appl. No.:

12/792963

Inventors:

Arjun G. Yodh - Merion PA, US
Mohammad F. Islam - Pittsburgh PA, US
Danvers E. Johnston - Philadelphia PA, US

Assignee:

THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA - Philadelphia PA

International Classification:

G01N 33/00
D01F 9/12
C09K 5/00
H01B 1/04
C07C 211/02
C07C 53/00
C07C 11/00
B05D 5/00
B32B 3/10
H05K 1/00
G21G 4/00

US Classification:

422 681, 4234472, 252 74, 252511, 4234471, 564463, 562512, 585 16, 427256, 4281951, 428172, 174250, 2504931, 977742, 977750, 977842

Abstract:

Disclosed are copolymers of carbon nanotubes, as well as processes and applications of carbon nanotube dispersions. Carbon nanotube emulsions and related technology are also disclosed. The controlled deposition of carbon nanotubes on substrates is also provided. Methods of purifying single-walled carbon nanotubes are also provided. Devices made according to the disclosed methods are further described herein.