Patents by Inventor Shamsoddin Mohajerzadeh
Shamsoddin Mohajerzadeh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11309538Abstract: A method for fabricating porous wire-in-tube (WiT) nanostructures including forming a first porous core-shell nanostructure, forming a second porous core-shell nanostructure by increasing thickness and porosity of the porous core-shell nanostructure, and forming a porous WiT nanostructure by etching the second porous core-shell nanostructure. Forming the first porous core-shell nanostructure may include forming a porous layer on a semi-conductive core by depositing a first plurality of particles on the semi-conductive core and generating an initial porous semi-conductive core by etching the semi-conductive core simultaneously with forming the porous layer.Type: GrantFiled: October 5, 2019Date of Patent: April 19, 2022Assignee: UNIVERSITY OF TEHRANInventors: Mehrnoosh Sadeghipari, Mohammadreza Hajmirzaheydarali, Shamsoddin Mohajerzadeh, Alireza Mashayekhi, Mohammad Ala Mohajerzadeh, Ali Akhavan Farahani
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Publication number: 20200052284Abstract: A method for fabricating porous wire-in-tube (WiT) nanostructures including forming a first porous core-shell nanostructure, forming a second porous core-shell nanostructure by increasing thickness and porosity of the porous core-shell nanostructure, and forming a porous WiT nanostructure by etching the second porous core-shell nanostructure. Forming the first porous core-shell nanostructure may include forming a porous layer on a semi-conductive core by depositing a first plurality of particles on the semi-conductive core and generating an initial porous semi-conductive core by etching the semi-conductive core simultaneously with forming the porous layer.Type: ApplicationFiled: October 5, 2019Publication date: February 13, 2020Inventors: Mehrnoosh Sadeghipari, Mohammadreza Hajmirzaheydarali, Shamsoddin Mohajerzadeh, Alireza Mashayekhi, Mohammad Ala Mohajerzadeh, Ali Akhavan Farahani
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Publication number: 20180149652Abstract: A method for detection and monitoring a spreading stage of a biological cell for cancer diagnosis is disclosed. The method includes steps of removing biological cell lines from a material; culturing the cell lines via maintaining the removed biological cell lines in an appropriate medium at a controlled set of conditions; seeding the cultured biological cells lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); and measuring an electrical impedance of the seeded biological cell lines to detect and monitor a spreading state of the seeded biological cell lines for cancer diagnosis.Type: ApplicationFiled: January 15, 2018Publication date: May 31, 2018Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Publication number: 20180136189Abstract: A method for detection and monitoring a therapeutic effect of a cancer treatment drug is disclosed. The method includes steps of removing a malignant biological cell lines from a tumor; culturing the removed biological cell lines in a controlled set of conditions; seeding the cultured biological cell lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); adding a cancer treatment drug to the seeded biological cell lines to treat the seeded biological cell lines; and measuring an electrical impedance of the treated biological cell lines for detection and monitoring a therapeutic effect of the cancer treatment drug.Type: ApplicationFiled: December 25, 2017Publication date: May 17, 2018Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Patent number: 9869666Abstract: A method for detection and monitoring a spreading stage of a biological cell for cancer diagnosis is disclosed. The method includes steps of removing biological cell lines from a material; culturing the cell lines via maintaining the removed biological cell lines in an appropriate medium at a controlled set of conditions; seeding the cultured biological cells lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); and measuring an electrical impedance of the seeded biological cell lines to detect and monitor a spreading state of the seeded biological cell lines for cancer diagnosis.Type: GrantFiled: March 2, 2016Date of Patent: January 16, 2018Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Patent number: 9851343Abstract: A method for detection and monitoring a therapeutic effect of a cancer treatment drug is disclosed. The method includes steps of removing a malignant biological cell lines from a tumor; culturing the removed biological cell lines in a controlled set of conditions; seeding the cultured biological cell lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); adding a cancer treatment drug to the seeded biological cell lines to treat the seeded biological cell lines; and measuring an electrical impedance of the treated biological cell lines for detection and monitoring a therapeutic effect of the cancer treatment drug.Type: GrantFiled: March 2, 2016Date of Patent: December 26, 2017Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Publication number: 20160178605Abstract: An electrical cell-substrate impedance sensor (ECIS) includes a substrate; a catalyst layer formed on the substrate; and a plurality of nanowire electrodes array grown on the catalyst layer. The plurality of nanowire electrodes are configured to measure an electrical response of a biological cell.Type: ApplicationFiled: March 2, 2016Publication date: June 23, 2016Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Publication number: 20160178613Abstract: A method for detection and monitoring a therapeutic effect of a cancer treatment drug is disclosed. The method includes steps of removing a malignant biological cell lines from a tumor; culturing the removed biological cell lines in a controlled set of conditions; seeding the cultured biological cell lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); adding a cancer treatment drug to the seeded biological cell lines to treat the seeded biological cell lines; and measuring an electrical impedance of the treated biological cell lines for detection and monitoring a therapeutic effect of the cancer treatment drug.Type: ApplicationFiled: March 2, 2016Publication date: June 23, 2016Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Publication number: 20160178628Abstract: A method for detection and monitoring a spreading stage of a biological cell for cancer diagnosis is disclosed. The method includes steps of removing biological cell lines from a material; culturing the cell lines via maintaining the removed biological cell lines in an appropriate medium at a controlled set of conditions; seeding the cultured biological cells lines on silicon nanowire electrode arrays of an electrical cell-substrate impedance sensor (ECIS); and measuring an electrical impedance of the seeded biological cell lines to detect and monitor a spreading state of the seeded biological cell lines for cancer diagnosis.Type: ApplicationFiled: March 2, 2016Publication date: June 23, 2016Inventors: Mohammad Abdolahad, Milad Gharooni, Shamsoddin Mohajerzadeh, Hamed Abiri, Mohsen Janmaleki
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Patent number: 8956820Abstract: The various embodiments herein provide a method for detecting the cancerous cells using the carbon nanotubes. The method comprises preparing a solution of the tissue cells. The prepared solution of the tissue cells is poured on a fabricated substrate to carry out an entrapment of the tissue cells on the substrate. The substrate is dried after the entrapment in an air ambient and observed under a scanning electron microscope. The cancer cell is detected based on the biomechanical properties such as softness, deformability and an elasticity of the cancer cells. The cancer cell is detected based on the deflection of the substrate due to the entrapment of the cancer cells.Type: GrantFiled: April 19, 2012Date of Patent: February 17, 2015Inventors: Shamsoddin Mohajerzadeh, Mohammad Abdolahad, Zeinab Sanaee, Mohammad Abdollahi
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Patent number: 8767184Abstract: An optical nanolithography system and a method for optical nanolithography using a tilting transparent medium are disclosed. Initially, a pattern is exposed on a substrate at a first location by sending electromagnetic energy through the tilting transparent medium at a first angle. Then, the angle of the tilting transparent medium is changed to a second angle that is different from the first angle. Next, the pattern is exposed on the substrate at a second location by sending electromagnetic energy through the tilting transparent medium at the second angle. The second location is different from and partially overlaps with the first location. Then, the substrate is developed so that overlapping regions of the substrate exposed by the pattern at the first location and at the second location are developed differently from non-overlapping regions of the substrate exposed by the pattern only at the first location or at the second location.Type: GrantFiled: March 14, 2011Date of Patent: July 1, 2014Inventors: Seyed Shamsoddin Mohajerzadeh, Javad Koohsorkhi, Zahra Kolahdouz Esfahani
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Patent number: 8642371Abstract: The various embodiments herein provide a method for fabricating Ion-Selective Field-Effect Transistor (ISFET) with a nano porous poly silicon layer on a gate region. The method includes providing a p-type silicon substrate and forming a silicon dioxide layer on the p-type silicon substrate. A poly silicon layer is deposited on the silicon dioxide layer. The poly silicon layer is patterned to form a gate region, a source region and a drain region in the silicon dioxide layer. A passivation layer is deposited on the gate region, source region and the drain region. The passivation layer is etched using a buffered HF to transform the poly silicon layer into a nano porous layer on the gate region by a sequential reactive ion etching process.Type: GrantFiled: September 25, 2011Date of Patent: February 4, 2014Inventors: Shamsoddin Mohajerzadeh, Mehran Shahmohammdi, Nina Zehfroosh
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Publication number: 20130102027Abstract: The various embodiments herein provide a method for detecting the cancerous cells using the carbon nanotubes. The method comprises preparing a solution of the tissue cells. The prepared solution of the tissue cells is poured on a fabricated substrate to carry out an entrapment of the tissue cells on the substrate. The substrate is dried after the entrapment in an air ambient and observed under a scanning electron microscope. The cancer cell is detected based on the biomechanical properties such as softness, deformability and an elasticity of the cancer cells. The cancer cell is detected based on the deflection of the substrate due to the entrapment of the cancer cells.Type: ApplicationFiled: April 19, 2012Publication date: April 25, 2013Inventors: Shamsoddin Mohajerzadeh, Mohammad Abdolahad, Zeinab Sanaee, Mohammad Abdollahi
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Publication number: 20120258560Abstract: The various embodiments herein provide a method for fabricating Ion-Selective Field-Effect Transistor (ISFET) with a nano porous poly silicon layer on a gate region. The method includes providing a p-type silicon substrate and forming a silicon dioxide layer on the p-type silicon substrate. A poly silicon layer is deposited on the silicon dioxide layer. The poly silicon layer is patterned to form a gate region, a source region and a drain region in the silicon dioxide layer. A passivation layer is deposited on the gate region, source region and the drain region. The passivation layer is etched using a buffered HF to transform the poly silicon layer into a nano porous layer on the gate region by a sequential reactive ion etching process.Type: ApplicationFiled: September 25, 2011Publication date: October 11, 2012Inventors: Shamsoddin Mohajerzadeh, Mehran Shahmohammdi, Nina Zehfroosh
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Publication number: 20110164231Abstract: An optical nanolithography system and a method for optical nanolithography using a tilting transparent medium are disclosed. Initially, a pattern is exposed on a substrate at a first location by sending electromagnetic energy through the tilting transparent medium at a first angle. Then, the angle of the tilting transparent medium is changed to a second angle that is different from the first angle. Next, the pattern is exposed on the substrate at a second location by sending electromagnetic energy through the tilting transparent medium at the second angle. The second location is different from and partially overlaps with the first location. Then, the substrate is developed so that overlapping regions of the substrate exposed by the pattern at the first location and at the second location are developed differently from non-overlapping regions of the substrate exposed by the pattern only at the first location or at the second location.Type: ApplicationFiled: March 14, 2011Publication date: July 7, 2011Inventors: SEYED SHAMSODDIN MOHAJERZADEH, JAVAD KOOHSORKHI, ZAHRA KOLAHDOUZ ESFAHANI