Northeastern University

University of Massachusetts

University of New Hampshire

P.c.t. Systems, Inc.

Ahmed Busnaina

Sivasubramanian Somu

Cihan Yilmaz

Xugang Xiong

Jun Huang

TaeHoon Kim

Nicol E McGruer

George G Adams

Hanchul Cho

Peter Ryan

Taehoon Kim

Asli Sirman

Joey L Mead

Yung Joon Jung

Carol M F Barry

Zhimin Chai

Anthony Childress

Ming Wei

Jin Young Lee

Zhenghong Tao

Vladimir P Torchilin

Henry R Miranda

Glen P Miller

Tiziana Musacchio

Sharyl L Maraviov

Young Lae Kim

Moneesh Upmanyu

Mehmet Remzi Dokmeci

Chia-Ling Chen

Aniket Datar

Garry L Montierth

Adnan Korkmaz

Salman A Abbasi

Laila Jaberansari

Nam-Goo Cha

Asanterabi Malima

Salome Siavoshi

Hobin Jeong

Yolanda Echegoyen

Jaydev Upponi

Nishant Khanduja

Selvapraba Selvarasah

Prashanth Makaram

Sivasumbramanian Somu

Systems and methods for cooling integrated circuits and other chop-based electronic devices use plasmonic absorption and emission of near infrared (NIR) radiation. Nanostructure arrays tuned to appropriate infrared wavelengths emit NIR from a hot chip substrate to other nanostructure arrays at the chip outer package, which absorb the NIR and transmit it away from the package outer surface.

Printed micro and nanostructured arrays for thermal management of electronic devices

Interfacial convective assembly can assemble any type of nanoparticles or other nanoelements in minutes to form microscale and nanoscale patterns in vias or trenches in patterned substrates. A solvent film is deposited on a patterned substrate. An aqueous suspension of nanoparticles is deposited onto the solvent film, thereby forming an interfacial liquid system comprising the nanoparticles within an enclosed space on the substrate. The substrate is then heated, thereby inducing convective flow in the interfacial liquid system. The convective flow includes solutal Marangoni convective flow in a direction towards the patterned substrate, causing nanoelements to be transferred to and bind to the patterned substrate. The nanoelements can be assembled on both hydrophilic and hydrophobic surfaces. Nanoparticles can fuse during the process to provide solid or single crystalline electrical circuit components.

High rate printing of microscale and nanoscale patterns using interfacial convective assembly

Devices and methods for detecting an analyte in a gas involve the use of plasmonic excitation of a nanostructured sensing element that is tuned to absorb at a narrow bandwidth specific for light absorbed by the analyte. The sensing element can be used as a capacitive or inductive element in a circuit.

Sensors with capacitive transduction via metamaterials for gas detection

A scalable printing process capable of printing microscale and nanoscale features for additively manufacturing electronics is provided. This fast, directed assembly-based approach selectively prints microscale and nanoscale features on both rigid and flexible substrates. The printing speed is much faster than state-of-the-art inkjet and flexographic printing, and the resolution is two orders of magnitude higher, with minimum feature size of 100 nm. Feature patterns can be printed over large areas and require no special limitations on the assembled materials. Hydrophilic/hydrophobic patterns are used to direct deposition of nanomaterials to specific regions or to selectively assemble polymer blends to desired sites in a one-step process with high specificity and selectively. The selective deposition can be based on electrostatic forces, hydrogen bonding, or hydrophobic interactions. The methods and nanoscale patterned substrates can be used with polyelectrolytes, conductive polymers, colloids, and nanoparticles for application in electronics, sensors, energy, medical devices, and structural materials.

Fast fluidic assembly method for nanoscale and microscale printing

A variety of homogeneous or layered hybrid nanostructures are fabricated by electric field-directed assembly of nanoelements. The nanoelements and the fabricated nanostructures can be conducting, semi-conducting, or insulating, or any combination thereof. Factors for enhancing the assembly process are identified, including optimization of the electric field and combined dielectrophoretic and electrophoretic forces to drive assembly. The fabrication methods are rapid and scalable. The resulting nanostructures have electrical and optical properties that render them highly useful in nanoscale electronics, optics, and biosensors.

Three-dimensional crystalline, homogeneous, and hybrid nanostructures fabricated by electric field directed assembly of nanoelements

Methods of fabricating a damascene template for electrophoretic assembly and transfer of patterned nanoelements are provided which do not require chemical mechanical polishing to achieve a uniform surface area. The methods include conductive layer fabrication using a combination of precision lithography techniques using etching or building up the conductive layer to form raised conductive features separated by an insulating layer of equal height.

Damascene template for nanoelement printing fabricated without chemomechanical planarization

Damascene templates have two-dimensionally patterned raised metal features disposed on an underlying conductive layer extending across a substrate. The templates are topographically flat overall, and the patterned conductive features establish micron-scale and nanometer-scale patterns for the assembly of nanoelements into nanoscale circuits and sensors. The templates are made using microfabrication techniques together with chemical mechanical polishing. These templates are compatible with various directed assembly techniques, including electrophoresis, and offer essentially 100% efficient assembly and transfer of nanoelements in a continuous operation cycle. The templates can be repeatedly used for transfer of patterned nanoelements thousands of times with minimal or no damage, and the transfer process involves no intermediate processes between cycles. The assembly and transfer processes employed are carried out at room temperature and pressure and are thus amenable to low cost, high-rate device production.

Damascene template for directed assembly and transfer of nanoelements

A method for assembling colloidal particles onto a substrate surface through fluid transport. The method comprises placing a first fluid placed adjacent to the substrate surface, applying a colloidal dispersion on top of the first fluid layer and removal of the first fluid layer. The method is extremely versatile, and is especially useful in depositing colloidal materials in high aspect ratio channels and vias without the need for prior treatment of the surface.

Interfacial convective assembly for high aspect ratio structures without surface treatment

A method for high rate assembly of nanoelements into two-dimensional void patterns on a non-conductive substrate surface utilizes an applied electric field to stabilize against forces resulting from pulling the substrate through the surface of a nanoelement suspension. The electric field contours emanating from a conductive layer in the substrate, covered by an insulating layer, are modified by a patterned photoresist layer, resulting in an increased driving force for nanoelements to migrate from a liquid suspension to voids on a patterned substrate having a non-conductive surface. The method can be used for the production of microscale and nanoscale circuits, sensors, and other electronic devices.

High rate electric field driven nanoelement assembly on an insulated surface

A single-walled carbon nanotube-based micron scale multiplex biosensor is provided that enables the detection of glucose, lactate, and urea. The sensor is based on modification of semiconducting single-walled carbon nanotubes using a linker that non-covalently associates with the nanotubes and covalently couples to an enzyme. Reaction of a physiological substrate with the enzyme results in increased resistance of the nanotubes within the sensor. The sensor is suitable for use in patient monitoring, particularly in a clinical setting. Incorporation of read out electronics and an RF signal generator into the sensor device enables it to communicate to a relay station or remote receiver. Methods are also provided for fabricating the biosensor device and using the device for detection.

Single-walled carbon nanotube biosensor for detection of glucose, lactate, and urea

The invention provides a fast, scalable, room temperature process for fabricating metallic nanorods from nanoparticles or fabricating metallic or semiconducting nanorods from carbon nanotubes suspended in an aqueous solution. The assembled nanorods are suitable for use as nanoscale interconnects in CMOS-based devices and sensors. Metallic nanoparticles or carbon nanotubes are assembled into lithographically patterned vias by applying an external electric field. Since the dimensions of nanorods are controlled by the dimensions of vias, the nanorod dimensions can be scaled down to the low nanometer range. The aqueous assembly process is environmentally friendly and can be used to make nanorods using different types of metallic particles as well as semiconducting and metallic nanotubes.

Nanoscale interconnects fabricated by electrical field directed assembly of nanoelements

A carbon nanotube-based micron scale chemical sensor or sensor array is provided that enables the remote detection of hydrogen sulfide and other chemicals in a gas stream. The sensor is suitable for use in harsh environments of high temperature and pressure such as those encountered during petrochemical exploration and recovery. Multiplex sensor devices detect two or more chemical agents simultaneously, or they can detect conditions such as pressure, salinity, humidity, pH, or scale-forming ions. Incorporation of read out electronics and an RF signal generator into the sensor device enables it to communicate to a relay station or receiver for 3D mapping or other analysis. Methods are also provided for fabricating the chemical sensor device and using the device for detection.

Chemical sensor based on highly organized single walled carbon nanotube networks

The present invention provides methods and tools for directed assembly of nanoelements across a large area using a nanosubstrate. The nanosubstrate has a substrate layer, an adhesive layer, a conductive layer, and an insulating layer that is interrupted by one or more nanotrenches or nanowells having a width of at least 20 nm. The nanosubstrate allows the rapid assembly of linear assemblies and arrays of single walled carbon nanotubes and nanoparticles by DC electrophoresis. The density of nanoelements assembled can be controlled by varying the voltage and trench size. Functionalized nanoparticles can be assembled into arrays useful, e.g., as biosensors.

Directed assembly of carbon nanotubes and nanoparticles using nanotemplates

Growing community of inventors

Needham, MA, United States of America

Ahmed Busnaina