David L Carnahan

US Patent:

6871528, Mar 29, 2005

Filed:

Apr 14, 2003

Appl. No.:

10/413598

Inventors:

Rudiger Schlaf - Lutz FL, US
Zhifeng F. Ren - Newton MA, US
Jianguo Wen - Brookline MA, US
David L. Carnahan - Needham MA, US

Assignee:

University of South Florida - Tampa FL
Boston College - Chestnut Hill MA
Nanolab, Inc. - Newton MA

International Classification:

G01B005/28
G01N013/16

US Classification:

73105

Abstract:

A method of producing a branched carbon nanotube (CNT) is disclosed. The branched CNT is used with an atomic force microscope having a cantilever and a tip and that is able to measure a surface of a substrate as well as an undercut feature of the substrate that protrudes from the surface. A catalytic material is deposited onto the tip of the microscope, and the catalytic material is subjected to chemical vapor deposition. This initiates growth of a primary branch of the branched carbon nanotube such that the primary branch extends from the tip. A secondary branch is then introduced to extend from the primary branch and produce the branched carbon nanotube. The primary branch interacts with the surface of the substrate and the secondary branch interacts with the undercut feature.

US Patent:

6950296, Sep 27, 2005

Filed:

Jan 25, 2002

Appl. No.:

10/057262

Inventors:

David L. Carnahan - Needham MA, US

Assignee:

NanoLab, Inc. - Newton MA

International Classification:

H05F003/00

US Classification:

361233, 310309

Abstract:

A nanoscale grasping device comprising at least three electrostatically actuated grasping elements. The use of at least three elements, which together define a plane, allows an object to be grasped more accurately, more easily held, and more readily manipulated. The grasping elements preferably comprise conductive nanotubes which are grown at specific points on a substrate (e. g. , directly on an electrode), using chemical vapor deposition (“CVD”) techniques, thereby allowing the grasping device to be manufactured with greater control. Different types of electrostatic forces may be used to open or close the grasping tool. Such attractive and repulsive forces can be created through the application of either a constant voltage or an oscillating voltage.

US Patent:

7018944, Mar 28, 2006

Filed:

Jul 21, 2003

Appl. No.:

10/623678

Inventors:

David L. Carnahan - Needham MA, US

Assignee:

NanoLab, Inc. - Newton MA

International Classification:

H01L 21/00

US Classification:

438942, 438736, 438738, 438742, 438743, 438744, 438780

Abstract:

A method and apparatus that produces highly ordered, nanosized particle arrays on various substrates. These regular arrays may be used as masks to deposit and grow other nanoscale materials.

US Patent:

7751171, Jul 6, 2010

Filed:

Sep 12, 2005

Appl. No.:

11/224684

Inventors:

David L. Carnahan - Needham MA, US

Assignee:

NanoLab, Inc. - Newton MA

International Classification:

H01T 23/00

US Classification:

361233

Abstract:

A nanoscale grasping device comprising at least three electrostatically actuated grasping elements, wherein the nanoscale grasping device may be used to more accurately grasp an object, more easily hold an object in a defined location or orientation and more readily manipulate an object.

US Patent:

7752997, Jul 13, 2010

Filed:

Feb 14, 2006

Appl. No.:

11/354341

Inventors:

David L. Carnahan - Needham MA, US

Assignee:

NanoLab, Inc. - Newton MA

International Classification:

B05C 3/00

US Classification:

118421, 118692

Abstract:

A method and apparatus that produces highly ordered, nanosized particle arrays on various substrates. These regular arrays may be used as masks to deposit and grow other nanoscale materials.

US Patent:

7935517, May 3, 2011

Filed:

Sep 22, 2005

Appl. No.:

11/233481

Inventors:

Dong Cai - Cambridge MA, US
David L. Carnahan - Needham MA, US

Assignee:

NanoLab, Inc. - Waltham MA

International Classification:

C12M 1/42

US Classification:

4352853, 977746, 977748

Abstract:

A nanostructured molecular delivery vehicle comprising magnetic materials and configured to receive passenger biomolecules. The application of a an appropriate magnetic field having a gradient orients and drives the vehicle into a biological target, which may comprise cells, cell masses, tissue slices, tissues, etc. Under the control of the magnetic field, these vehicles can penetrate cell membranes. Then, the biomolecules carried by the vehicle can be released into the cells to perform their functions. Using this “nanospearing” technique, unprecendented high transfection efficiency has been achieved in several difficult-to-transfect cells. These include, but are not limited to, Bal 17 cells, ex vivo B cells, primary cultured cortical neurons, etc. This method advances the state of the art, providing an improved technique for the introduction of exogenous molecules to cells, with the clinical applications including, but not being limited to, drug delivery, gene therapy, vaccination, etc.

US Patent:

8608085, Dec 17, 2013

Filed:

Oct 17, 2011

Appl. No.:

13/274786

Inventors:

David Carnahan - Needham MA, US
Iosif Izrailit - Newton MA, US

Assignee:

NanoLab, Inc. - Waltham MA

International Classification:

G06K 19/06

US Classification:

235492

Abstract:

A multi-pole switch comprising a conducting substrate; at least three field electrodes mounted above, and electrically isolated from, each other and from said conducting substrate; a conductive cantilever element having a first end portion secured to said conducting substrate, an opposite second free end portion positioned in spaced relation to said field electrodes and operable in response to an electrostatic or electrodynamic charge established between said cantilever element and said field electrodes to deflect in a direction towards said field electrodes; and a plurality of contact electrode poles mounted above, and electrically isolated from, said conducting substrate below the top of said cantilever element second free end portion and above said field electrodes and positioned to contact said cantilever element as said cantilever element is deflected in a direction defined by the net field applied by said field electrodes.

US Patent:

20120085695, Apr 12, 2012

Filed:

Oct 11, 2010

Appl. No.:

12/901892

Inventors:

Abhishek D. SAXENA - Somersworth NH, US
David L. CARNAHAN - Needham MA, US
Kapil KULKARNI - Waltham MA, US
Stephen E. GROSS - Dover NH, US

Assignee:

NanoLab, Inc. - Newton MA
Lydall, Inc. - Manchester CT

International Classification:

B01D 39/06
B82Y 30/00

US Classification:

210491, 210505, 210501, 977902

Abstract:

Disclosed is a media (such as a filter media) having one or more carbon nanotube (CNT)-containing layer. Each CNT-containing layer contains high temperature refractory fibers (e.g., staple quartz fibers and/or ceramic refractory fibers) that have melting temperatures greater than about 600 C. and in situ grown CNTs. Substantially all of the in situ grown CNTs have one end thereof associated with the fibers. This results in substantially all of the in situ grown CNTs extending away from substantially all of the fibers. Moreover, substantially all of the in situ grown CNTs are dispersed throughout the fibers. In one embodiment the media also includes one or more supporting layer. Each supporting layer contains high temperature refractory fibers that have melting temperatures greater than about 600 C., optionally bulk refractory fibers, optionally E-glass fibers, and optionally microglass fibers. The media can be tailored as a filter media to remove different size particles and have different dirt loading capacities depending upon the desire of the consumer.