Massachusetts Institute of Technology

University of California

Exxonmobil Technology and Engineering Company

Jeffrey C Grossman

Nicola Ferralis

Vladimir Bulovic

Brendan Derek Smith

Moungi G Bawendi

Alexander K Zettl

Jeffrey Hastings Lang

William E Mickelson

Kenneth Jensen

Apoorva Murarka

Alex Zettl

Brent Keller

Trisha L Andrew

Farnaz Niroui

Annie I-Jen Wang

Caglar Girit

Sarah Paydavosi

Xining Zang

Jatin Jayesh Patil

Frank Yaul

Timothy Manning Swager

Angela M Belcher

Mark M Disko

Charles Piskoti

Heather A Elsen

Marvin Lou Cohen

Sibo Lin

Steven G Louie

Mark W B Wilson

Neelkanth M Bardhan

Shreya H Dave

Ggoch Ddeul Han

Jose M Cordero

Alexie M Kolpak

Chia-Hao Marcus Chuang

Patrick Richard Brown

Gyuweon Hwang

David Zhitomirsky

Michel Cote

Geoffrey J Supran

Yoonseob Kim

Yanming Wang

Yifan Li

Yichong Wang

Arthur France-Lanord

You-Chi Wu

Cuiying Jian

Kiera Y Tai

Owen Morris

Donghun Kim

Ximena Hasbach

Thomas Andre Francois Sannicolo

Priyank Vijaya Kumar

Woo Hyun Chae

Composite electrodes and their methods of manufacture are disclosed. In one embodiment, an electrode may include a first layer including first particles, a second layer including conductive nanowires, and a third layer comprising second particles. The second layer may be disposed between and in electrical contact with the first layer and the third layer. The composite electrode may be substantially transparent in some embodiments.

Transparent composite nanowire electrodes

The present disclosure is directed to processes for forming or otherwise creating a transparent, conductive film from a heavy hydrocarbon material. It allows for what is often considered to be waste material to be transformed into a useful product, such as a heating element. Such heating elements can be incorporated into many contexts where it can be important to have transparency and/or a thin heating element, such as in windshields. The process involves dissolving a heavy hydrocarbon material in a solvent, casting the heavy hydrocarbon solution that results from the dissolving onto a substrate to form a film, and then annealing the film. The disclosure also provides for objects in which such resulting films can be used, such as Joule heaters.

Processes for forming transparent, conductive films from heavy hydrocarbons, and devices and systems into which such films are incorporated

Systems and methods for manufacturing sintered materials are disclosed. Metal nano- and microparticles can be sintered to form thin films. The metals are sintered in the presence of a binder such as a tar, e.g., steam cracker tar (SCT), which has strong absorbing and antioxidant properties that allow the metal particles to retain heat. Retention of heat by the binder can allow the sintering to occur at ambient temperatures. In some embodiments, the mixture and/or the resulting films can be used in additive manufacturing processes to build various components from the layers of thin film manufactured from the presently disclosed methods.

Systems and methods for manufacturing sintered metals

A major challenge in the development of anion exchange membranes for fuel cells is the design and synthesis of highly stable (chemically and mechanically) and conducting membranes. Membranes that can endure highly alkaline environments while rapidly transporting hydroxides are desired. A design for using cross-linked polymer membranes is disclosed to produce ionic highways along charge delocalized pyrazolium and homoconjugated triptycenes. The ionic highway membranes show improved performance in key parameters. Specifically, a conductivity of 111.6 mS cmat 80&#xb0; C. was obtained with a low 7.9% water uptake and 0.91 mmol gion exchange capacity. In contrast to existing materials, these systems have higher conductivities at reduced hydration and ionic exchange capacities, emphasizing the role of the highway. The membranes retain more than 75% of initial conductivity after 30 days of alkaline stability test. This effective water management through ionic highways is confirmed by density functional theory and Monte Carlo studies. A single cell with platinum group metal catalysts at 80&#xb0; C. showed a high peak density of 0.73 W cm(0.45 W cmfrom silver-based cathode) and stable performance during 400 h tests.

Membranes and anion conductive polymers

Methods for forming porous or nanoporous semiconductor materials are described. The methods allow for the formation of arrays pores or nanopores in semiconductor materials with advantageous pore size, spacing, pore volume, material thickness, and other aspects. Porous and nanoporous materials also are provided.

Porous and nanoporous semiconductor materials and manufacture thereof

Membranes comprising graphene oxide sheets and associated filter media and methods are provided. In some embodiments, a membrane may comprise graphene oxide sheets that have undergone one or more chemical treatments. The chemical treatment(s) may impart beneficial properties to the membrane, such as a relatively small d-spacing, compatibility with a broad range of environments, physical stability, and charge neutrality. For example, the graphene oxide sheets may undergo one or more chemical treatments that form chemical linkages between at least a portion of the graphene oxide sheets in the membrane. Such chemical linkages may impart a small d-spacing, broad compatibility, and/or allow relatively thick membranes to be formed. In certain embodiments, the graphene oxide sheets may undergo one or more chemical treatment that imparts relative charge neutrality to the membrane by altering the ionizability of certain functional groups. Graphene oxide membranes, described herein, can be used for a wide range applications.

Graphene oxide membranes and related methods

Methods for forming nanoporous semiconductor materials are described. The methods allow for the formation of micron-scale arrays of sub-10nm nanopores in semiconductor materials with narrow size distributions and aspect ratios of over 400:1.

Nanoporous semiconductor materials

A polymer consisting of small functional molecules can be integrated into solar thermal fuels in the solid-state for solar energy harvesting and storage. In certain embodiments, a solar energy storage device can include one or more layers of photoswitchable moieties associated with a polymer. Such solar thermal fuel polymers can be used to enable deposition from low concentration solutions, resulting in uniform and large-area thin-films. This approach enables conformal deposition on a variety of conducting substrates that can be either flat or structured and control over film growth via electrodeposition conditions and results in highly uniform and large-area thin films.

Polymer based solid-state solar thermal fuels

A solar thermal fuel can include a plurality of photoswitchable moieties associated with a nanomaterial. The plurality of photoswitchable moieties can be densely arranged on the nanomaterial, such that adjacent photoswitchable moieties interact with one another. The solar thermal fuel can provide high volumetric energy density.

Nano-templated energy storage materials

A light emitting device can include a light source, a first electrode, a second electrode, a first barrier layer, a second barrier layer, and an emitter layer between the first barrier layer and the second barrier layer. A method of controllably generating light can comprise two states: An ON state, wherein an emitter layer of a device (which includes a photoluminescent pixel) is illuminated with a light source in the absence of an electric field, and the emitter layer generates light through photoluminescence; and an OFF state, wherein an emitter layer of a device (which includes a photoluminescent pixel) is illuminated with a light source in the presence of a static or time-varying electric field, and the electric field or induced current results in quenching of the emitter photoluminescence.

Transparent luminescent displays enabled by electric-field-induced quenching of photoluminescent pixels

Methods for forming nanoporous semiconductor materials are described. The methods allow for the formation of micron-scale arrays of sub-10 nm nanopores in semiconductor materials with narrow size distributions and aspect ratios of over 400:1.

Nanoporous semiconductor materials and manufacture thereof

The size-dependent band-gap tunability and solution processability of nanocrystals (NCs) make them attractive candidates for optoelectronic applications. One factor that presently limits the device performance of NC thin films is sub-bandgap states, also referred to as trap states. Trap states can be controlled by surface treatment of the nanocrystals.

Eliminating emissive sub-bandgap states in nanocrystals

Embodiments described herein generally relate to compositions comprising a graphene oxide species. In some embodiments, the compositions advantageously have relatively high oxygen content, even after annealing.

Compositions comprising enhanced graphene oxide structures and related methods

A method and apparatus for making analog and digital electronics which includes a composite including a squishable material doped with conductive particles. A microelectromechanical systems (MEMS) device has a channel made from the composite, where the channel forms a primary conduction path for the device. Upon applied voltage, capacitive actuators squeeze the composite, causing it to become conductive. The squishable device includes a control electrode, and a composite electrically and mechanically connected to two terminal electrodes. By applying a voltage to the control electrode relative to a first terminal electrode, an electric field is developed between the control electrode and the first terminal electrode. This electric field results in an attractive force between the control electrode and the first terminal electrode, which compresses the composite and enables electric control of the electron conduction from the first terminal electrode through the channel to the second terminal electrode.

Electronically controlled squishable composite switch

Growing community of inventors

Brookline, MA, United States of America

Jeffrey C Grossman