Kitu Kumar Phones & Addresses
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Princeton Jct, NJ
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Hoboken, NJ
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17 Colonial Ave, Princeton Junction, NJ 08550
Emails
t***n@hotmail.com
Publications
Us Patents
High-Throughput Local Oxidation Nanolithographic Process
View pageUS Patent:
20100243472, Sep 30, 2010
Filed:
Mar 26, 2010
Appl. No.:
12/732518
Inventors:
Kitu Kumar - Princeton Junction NJ, US
International Classification:
C25F 3/02
US Classification:
205666
Abstract:
In a lithographic process suitable for use in the manufacture of electronic components, oxidative reactions are employed to reproducibly fabricate patterns having micro- or nano-scale dimensions. An electrically-conductive template is fabricated to have a nanometer-scale sharp edge and describe a pattern having a micron-scale length. The oxidative reaction is mediated by a water meniscus connecting the sharp edge of the template and an oxidizable substrate. One suitable substrate is graphene. The template can be controllably positioned using a light lever method.
High-Throughput Graphene Printing And Selective Transfer Using A Localized Laser Heating Technique
View pageUS Patent:
20140231002, Aug 21, 2014
Filed:
Feb 20, 2014
Appl. No.:
14/185350
Inventors:
- Hoboken NJ, US
Youn-Su Kim - Seoul, KR
Kitu Kumar - Princeton Junction NJ, US
Eui-Hyeok Yang - Fort Lee NJ, US
Youn-Su Kim - Seoul, KR
Kitu Kumar - Princeton Junction NJ, US
Eui-Hyeok Yang - Fort Lee NJ, US
Assignee:
THE TRUSTEES OF THE STEVENS INSTITUTE OF TECHNOLOGY - Hoboken NJ
International Classification:
B32B 37/00
US Classification:
156247, 1563796
Abstract:
A method of high-throughput printing and selective transfer of graphene onto a substrate includes the steps of: providing a thermal release tape having graphene adhered thereto; placing a substrate onto the graphene; pressing the thermal tape and the graphene against the substrate at a uniformly-distributed pressure; heating localized portions of the thermal tape and graphene using a localized heat source, thereby diminishing the adhesive properties of the thermal release tape in the localized portions and transferring graphene from said localized portions to the substrate; and separating the thermal release tape from the substrate. The method may include the further step of moving the localized heat source to selected positions on the thermal release tape during the heating step, thereby forming a pattern of heated portions. The method may use a laser beam as the localized heat source, movement of the laser beam being performed by a computer-controlled deflectable mirror.
Popcorn-Like Growth Of Graphene-Carbon Nanotube Multi-Stack Hybrid Three-Dimensional Architecture For Energy Storage Devices
View pageUS Patent:
20140127584, May 8, 2014
Filed:
Sep 6, 2013
Appl. No.:
14/019799
Inventors:
- Hoboken NJ, US
Kitu Kumar - Princeton Junction NJ, US
Frank Fisher - Union City NJ, US
Kitu Kumar - Princeton Junction NJ, US
Frank Fisher - Union City NJ, US
Assignee:
THE TRUSTEES OF THE STEVENS INSTITUTE OF TECHNOLOG - Hoboken NJ
International Classification:
H01M 4/587
US Classification:
4292318, 427113
Abstract:
Graphene-carbon nanotube multi-stack three-dimensional architectures (graphene-CNT stacks) are formed by a “popcorn-like” growth method, in which carbon nanotubes are grown throughout the architecture in a continuous step. Alternating layers of graphene and a transition metal are grown by a vapor deposition process. The metal is fragmented and etched to form an array of catalytic sites. Carbon nanotubes grow from the catalytic sites in a vapor-solid-liquid process. The graphene-CNT stacks have applications in electrical energy storage devices, such as supercapacitors and batteries. The directly grown carbon nanotube array between graphene layers provides ease of ion diffusion and electron transfer, in addition to being an active material, spacer and electron pathway.