公开(公告)号：US10943982B2

公开(公告)日：2021-03-09

申请号：US16127817

申请日：2018-09-11

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey C. Grossman ,  Brendan Derek Smith ,  Jatin Jayesh Patil ,  Nicola Ferralis

IPC: H01L29/32 ,  H01L21/308 ,  H01L21/306 ,  H01L29/16

Abstract: 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.

公开(公告)号：US20190088748A1

公开(公告)日：2019-03-21

申请号：US16127817

申请日：2018-09-11

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey C. Grossman ,  Brendan Derek Smith ,  Jatin Jayesh Patil ,  Nicola Ferralis

IPC: H01L29/32 ,  H01L21/308 ,  H01L21/306 ,  H01L29/16

Abstract: 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.

公开(公告)号：US20160336477A1

公开(公告)日：2016-11-17

申请号：US15095001

申请日：2016-04-08

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： Gyuweon Hwang ,  Donghun Kim ,  Jose M. Cordero ,  Mark W. B. Wilson ,  Chia-Hao M. Chuang ,  Jeffrey C. Grossman ,  Moungi G. Bawendi

IPC: H01L31/18 ,  H01L51/00 ,  H01L31/0445 ,  H01L31/036 ,  H01L31/032

CPC classification number: H01L31/18 ,  H01L31/0324 ,  H01L31/035218 ,  H01L31/036 ,  H01L31/0445 ,  H01L51/0001 ,  H01L51/0077 ,  H01L51/42 ,  H01L51/502

Abstract: 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.

Abstract translation: 纳米晶体（NC）的尺寸依赖带隙可调性和溶液可加工性使其成为光电子应用的有吸引力的候选者。 目前限制NC薄膜的器件性能的一个因素是子带隙状态，也称为陷阱状态。 陷阱状态可以通过纳米晶体的表面处理来控制。

公开(公告)号：US11658322B2

公开(公告)日：2023-05-23

申请号：US17088519

申请日：2020-11-03

Applicant: Massachusetts Institute of Technology

Inventor： Timothy Manning Swager ,  Jeffrey C. Grossman ,  Sibo Lin ,  Yoonseob Kim ,  Yanming Wang ,  Arthur France-Lanord ,  You-Chi Wu ,  Yifan Li ,  Yichong Wang

IPC: H01M8/10 ,  B01J47/12 ,  B01J41/07 ,  C08J5/22 ,  B01J41/13 ,  H01M8/1032 ,  H01M8/1027

CPC classification number: H01M8/1032 ,  B01J41/07 ,  B01J41/13 ,  B01J47/12 ,  C08J5/2287 ,  H01M8/1027 ,  H01M2008/1095

Abstract: 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 cm−1 at 80° C. was obtained with a low 7.9% water uptake and 0.91 mmol g−1 ion 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° C. showed a high peak density of 0.73 W cm−2 (0.45 W cm−2 from silver-based cathode) and stable performance during 400 h tests.

公开(公告)号：US20170368508A1

公开(公告)日：2017-12-28

申请号：US15634767

申请日：2017-06-27

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey C. Grossman ,  Nicola Ferralis ,  David Cohen-Tanugi ,  Shreya H. Dave

IPC: B01D71/02 ,  B82Y30/00 ,  C01B32/184 ,  B32B3/00 ,  C08J9/26 ,  C02F1/44

CPC classification number: B01D71/021 ,  B32B3/00 ,  B82Y30/00 ,  C01B32/184 ,  C02F1/442 ,  C08J9/26

Abstract: Embodiments described herein relate to porous materials that may be employed in various filtration, purification, and/or separation applications. In some cases, the porous materials may be thin, flexible, and fabricated with control over average pore size and/or the spatial distribution of pores. Such porous materials may be useful in, for example, desalination.

公开(公告)号：US20220377887A1

公开(公告)日：2022-11-24

申请号：US17775571

申请日：2020-11-18

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey C. Grossman ,  Woo Hyun Chae ,  Thomas Andre Sannicolo

IPC: H05K1/09 ,  H01L51/44

Abstract: 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.

公开(公告)号：US20210135265A1

公开(公告)日：2021-05-06

申请号：US17088519

申请日：2020-11-03

Applicant: Massachusetts Institute of Technology

Inventor： Timothy Manning Swager ,  Jeffrey C. Grossman ,  Sibo Lin ,  Yoonseob Kim ,  Yanming Wang ,  Arthur France-Lanord ,  You-Chi Wu ,  Yifan Li ,  Yichong Wang

IPC: H01M8/1032 ,  B01J47/12 ,  B01J41/07 ,  B01J41/13 ,  C08J5/22 ,  H01M8/1027

Abstract: 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 cm−1 at 80° C. was obtained with a low 7.9% water uptake and 0.91 mmol g−1 ion 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° C. showed a high peak density of 0.73 W cm−2 (0.45 W cm−2 from silver-based cathode) and stable performance during 400 h tests.

公开(公告)号：US20170271604A1

公开(公告)日：2017-09-21

申请号：US15309797

申请日：2015-05-08

Applicant: Massachusetts Institute of Technology

Inventor： Patrick R. Brown ,  Donghun KIM ,  Moungi G. Bawendi ,  Jeffrey C. Grossman ,  Vladimir Bulovic

IPC: H01L51/42 ,  H01L51/00 ,  H01L51/44

CPC classification number: H01L51/426 ,  H01L31/0296 ,  H01L31/03845 ,  H01L51/0077 ,  H01L51/0558 ,  H01L51/441 ,  H01L2251/301 ,  Y02E10/549

Abstract: A method of improving performance of a photovoltaic device can include modifying a surface energy level of a nanocrystal through ligand exchange. A photovoltaic device can include a layer that includes a nanocrystal with a surface energy modified through ligand exchange.

公开(公告)号：US20170271459A1

公开(公告)日：2017-09-21

申请号：US15462620

申请日：2017-03-17

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey C. Grossman ,  Brendan Derek Smith ,  Jatin Jayesh Patil ,  Nicola Ferralis

IPC: H01L29/32 ,  H01L21/306 ,  H01L29/16

CPC classification number: H01L29/32 ,  H01L21/30604 ,  H01L21/3081 ,  H01L29/16

Abstract: 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.

公开(公告)号：US10974208B2

公开(公告)日：2021-04-13

申请号：US15593298

申请日：2017-05-11

Applicant: Massachusetts Institute of Technology

Inventor： Shreya H. Dave ,  Brent Keller ,  Ggoch Ddeul Han ,  Jeffrey C. Grossman

IPC: B01D71/02 ,  C01B32/198 ,  B32B15/085 ,  B01D67/00 ,  B32B9/00 ,  B32B27/30 ,  B32B27/32 ,  B32B27/28 ,  B32B3/26 ,  B32B7/10 ,  B32B15/09 ,  B32B15/082 ,  B32B9/04

Abstract: 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.