Robert Vajtai

US Patent:

20060027499, Feb 9, 2006

Filed:

Aug 1, 2005

Appl. No.:

11/193340

Inventors:

Pulickel Ajayan - Clifton Park NY, US
Saikat Talapatra - Troy NY, US
Robert Vajtai - Troy NY, US
Anchal Srivastava - Varanasi, IN
Onkar Srivastava - Varanasi, IN

International Classification:

D01F 9/12
B01D 65/02

US Classification:

210636000, 423447200, 210650000, 210652000, 210321870, 210321880, 210497010

Abstract:

Monolithic, macroscopic, nanoporous nanotube filters are fabricated having radially aligned carbon nanotube walls. The freestanding filters have diameters and lengths up to several centimeters. A single-step filtering process was demonstrated in two important settings: the elimination of multiple components of heavy hydrocarbons from petroleum, a crucial step in post-distillation of crude oil, and the elimination of bacterial contaminants such as or the nanometer-sized poliovirus from drinking water. All the filtration processes were repeated several times with completely reproducible results. These nanotube filters can be cleaned repeatedly after each filtration process to regain their full filtering efficiency.

US Patent:

20120128880, May 24, 2012

Filed:

Aug 25, 2006

Appl. No.:

11/509810

Inventors:

Saikat Talapatra - Troy NY, US
Swastik Kar - Troy NY, US
Sunil Pal - Troy NY, US
Robert Vajtai - Troy NY, US
Pulickel Ajayan - Clifton Park NY, US

International Classification:

C23C 16/26
B32B 5/16
B05D 5/12
B82Y 40/00

US Classification:

4272491, 427 78, 427 79, 428323, 977843

Abstract:

A chemical vapor deposition (CVD) method using a vapor phase catalyst of directly growing aligned carbon nanotubes on a metal surfaces. The method allows for fabrication of carbon nanotube containing structures that exhibit a robust carbon nanotube metal junction without a pre-growth application of solid catalytic materials to the metal surface or the use of solder or adhesives in a multi-step fabrication process.

US Patent:

20160118527, Apr 28, 2016

Filed:

Oct 23, 2014

Appl. No.:

14/522215

Inventors:

Sidong Lei - Houston TX, US
Liehui Ge - Houston TX, US
Antony George - Houston TX, US
Bo Li - Houston TX, US
Robert Vajtai - Houston TX, US
Pulickel M. Ajayan - Houston TX, US

Assignee:

William Marsh Rice University - Houston TX

International Classification:

H01L 31/113
H01L 31/18
H01L 31/0352
H01L 31/0224

Abstract:

An opto-electronic sensor may provide one or more layers of atomically layered photo-sensitive materials. The sensor may include a gate electrode layer, a dielectric layer in contact with the gate electrode layer, and a working media layer that is photo-sensitive deposited on the dielectric layer. The working media layer may provide one or more layers of one or more materials where each of the one or more layers is an atomic layer. The sensor may also include side electrodes in contact with the working media layer.