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1.发明授权公开(公告)号：US11372118B2
公开(公告)日：2022-06-28
申请号：US16331648
申请日：2017-09-11
Applicant: Northeastern University
Inventor： Ji Hao , Swastik Kar , Yung Joon Jung , Daniel Rubin
IPC: G01T1/24 , G01T1/185 , B82Y15/00 , H01J49/02 , H01J49/04 , C01B32/159 , C01B32/182 , C01B19/04
Abstract: Ultrasensitive, miniaturized, and inexpensive ion and ionizing radiation detection devices are provided. The devices include an insulating substrate, metallic contact pads disposed on a surface of the substrate, and a strip of an ultrathin two-dimensional material having a thickness of one or a few atomic layers. The strip is in contact with the contact pads, and a voltage is applied across the two-dimensional sensor material. Individual ions contacting the two-dimensional material alter the current flowing through the material and are detected. The devices can be used in a network of monitors for high energy ions and ionizing radiation.
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公开(公告)号：US11041247B2
公开(公告)日：2021-06-22
申请号：US16781486
申请日：2020-02-04
Applicant: Northeastern University
Inventor： Pradeep Waduge , Swastik Kar , Meni Wanunu , Joseph Larkin , Ismail Bilgin
IPC: C25B9/23 , G01N33/487 , C01B32/186 , C12Q1/6869 , G01N27/447
Abstract: The invention provides methods for direct growth of low noise, atomically thin freestanding membranes of two-dimensional monocrystalline or polycrystalline materials, such as transition metal chalcogenides including molybdenum disulfide. The freestanding membranes are directly grown over an aperture by reacting two precursors in a chemical vapor deposition process carried out at atmospheric pressure. Membrane growth is preferentially over apertures in a thin sheet of solid state material. The resulting membranes are one or a few atomic layers thick and essentially free of defects. The membranes are useful for sequencing of biopolymers through nanopores.
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公开(公告)号：US10550487B2
公开(公告)日：2020-02-04
申请号：US15552373
申请日：2015-11-25
Applicant: Northeastern University
Inventor： Pradeep Waduge , Swastik Kar , Meni Wanunu , Joseph Larkin , Ismail Bilgin
IPC: C25B9/10 , G01N33/487 , C01B32/186 , C12Q1/6869 , G01N27/447
Abstract: The invention provides methods for direct growth of low noise, atomically thin freestanding membranes of two-dimensional monocrystalline or polycrystalline materials, such as transition metal chalcogenides including molybdenum disulfide. The freestanding membranes are directly grown over an aperture by reacting two precursors in a chemical vapor deposition process carried out at atmospheric pressure. Membrane growth is preferentially over apertures in a thin sheet of solid state material. The resulting membranes are one or a few atomic layers thick and essentially free of defects. The membranes are useful for sequencing of biopolymers through nanopores.
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公开(公告)号：US11293116B2
公开(公告)日：2022-04-05
申请号：US16326856
申请日：2017-08-23
Applicant: Northeastern University
Inventor： Anthony Vargas , Fangze Liu , Christopher Adrian Lane , Daniel Rubin , Swastik Kar , Arun Bansil , Gianina Buda , Zachariah Hennighausen
Abstract: Heterocrystals of metal dichalcogenides and Bi2S3, Bi2Se3 or Bi2Te3 are presented, in which the metal dichalcogenides and Bi2S3, Bi2Se3 or Bi2Te3 do not largely retain their independent properties. These heterocrystals exhibit electronic and optical changes, which make them attractive for beyond-silicon electronics and optoelectronics. Particularly, these heterocrystals can be re-configured in a manner that allows bit writing and pattern drawing. Embodiments of these heterocrystals, methods of forming these heterocrystals, methods of reconfiguring the heterocrystals, information storage devices, optoelectronic circuits and photonic crystals are presented.
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公开(公告)号：US10646846B2
公开(公告)日：2020-05-12
申请号：US15510789
申请日：2015-09-14
Inventor： Yung Joon Jung , Hyun Young Jung , Swastik Kar , Chi Won Ahn , Mildred Dresselhaus , Paulo Antonio Trindade Araujo
IPC: B01J19/08 , C01B32/16 , C01B32/168 , C01B32/18 , C01B32/184 , H01B1/04 , B82Y30/00 , B82Y40/00
Abstract: Inter-allotropic transformations of carbon are provided using moderate conditions including alternating voltage pulses and modest temperature elevation. By controlling the pulse magnitude, small-diameter single-walled carbon nanotubes are transformed into larger-diameter single-walled carbon nanotubes, multi-walled carbon nanotubes of different morphologies, and multi-layered graphene nanoribbons.
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Patent Agency Ranking
公开(公告)号：US20190211474A1
公开(公告)日：2019-07-11
申请号：US16326856
申请日：2017-08-23
Applicant: Northeastern University
Inventor： Anthony Vargas , Fangze Liu , Christopher Adrian Lane , Daniel Rubin , Swastik Kar , Arun Bansil , Gianina Buda , Zachariah Hennighausen
CPC classification number: C30B29/46 , C30B25/02 , C30B29/68 , C30B30/00 , C30B33/02 , C30B33/04 , G11B7/1369 , H01L21/02485 , H01L21/02499 , H01L21/02505 , H01L21/02568 , H01L21/0262
Abstract: Heterocrystals of metal dichalcogenides and Bi2S3, Bi2Se3 or Bi2Te3 are presented, in which the metal dichalcogenides and Bi2S3, Bi2Se3 or Bi2Te3 do not largely retain their independent properties. These heterocrystals exhibit electronic and optical changes, which make them attractive for beyond-silicon electronics and optoelectronics. Particularly, these heterocrystals can be re-configured in a manner that allows bit writing and pattern drawing. Embodiments of these heterocrystals, methods of forming these heterocrystals, methods of reconfiguring the heterocrystals, information storage devices, optoelectronic circuits and photonic crystals are presented.
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公开(公告)号：US12104958B2
公开(公告)日：2024-10-01
申请号：US17777091
申请日：2020-11-16
Applicant: Northeastern University
Inventor： Swastik Kar , Davoud Hejazi , Sarah Ostadabbas
CPC classification number: G01J3/462 , G01J3/513 , G01J2003/1213
Abstract: Devices and methods of the present technology utilize wavelength-dependent transmittance of 2D materials to identify the wavelength of an electromagnetic radiation. A wide range of 2D materials can be used, making possible the use of the technology over a large portion of the electromagnetic spectrum, from gamma rays to the far infrared. When combined with appropriate algorithms and artificial intelligence, the technology can identify the wavelength of one or more monochromatic sources, or can identify color through the use of a training set. When applied in an array format, the technology can provide color imaging or spectral imaging using different regions of the electromagnetic spectrum.
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8.发明申请公开(公告)号：US20150243826A1
公开(公告)日：2015-08-27
申请号：US14423636
申请日：2013-08-27
Applicant: Northeastern University
Inventor： Xiaohong An , Fangze Liu , Swastik Kar
IPC: H01L31/112 , H01L31/18 , H01L31/028
CPC classification number: H01L31/112 , H01L31/028 , H01L31/109 , H01L31/1804
Abstract: Provided in one embodiment is a method for operating a photodiode device, which device comprises: at least one layer of an n-doped semiconductor material; two portions of a dielectric material separately disposed over separate regions of the at least one layer of the n-doped semiconductor material; at least one monolayer of a carbon-based material disposed between the two portions of dielectric material and over the at least one layer of the n-doped semiconductor material; two terminal electrodes, each electrode disposed in electrical communication with a respective one of the portions of dielectric material; and a gate electrode in electrical communication with the at least one layer of the n-doped semiconductor material. The method comprises: applying a voltage across the gate electrode and one of the two terminal electrodes; and exposing the photodiode device to electromagnetic radiation.
Abstract translation: 在一个实施例中提供了一种用于操作光电二极管器件的方法，该器件包括：至少一层n掺杂半导体材料; 介电材料的两部分分别设置在n掺杂半导体材料的至少一层的分离区域上; 设置在电介质材料的两个部分之间并且在n掺杂半导体材料的至少一个层上的碳基材料的至少一个单层; 两个端子电极，每个电极设置成与电介质材料的相应部分电连通; 以及栅电极，与n掺杂半导体材料的至少一层电连通。 该方法包括：在栅电极和两个端电极中的一个之间施加电压; 以及将所述光电二极管器件暴露于电磁辐射。
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9.发明申请Optoelectronic Devices Based on Heterojunctions of Single-Walled Carbon Nanotubes and Silicon 审中-公开基于单壁碳纳米管和硅的异质结的光电器件公开(公告)号：US20150228917A1
公开(公告)日：2015-08-13
申请号：US14428398
申请日：2013-09-19
Applicant: NORTHEASTERN UNIVERSITY
Inventor： Yung Joon Jung , Swastik Kar , Young Lae Kim , Hyun Young Jung , Young Kyun Kwon
IPC: H01L51/42
CPC classification number: H01L51/4213 , B82Y20/00 , B82Y40/00 , H01L31/102 , H01L51/0048 , H01L2031/0344 , Y02E10/549 , Y10S977/75 , Y10S977/845 , Y10S977/954
Abstract: Heterojunctions of single-walled carbon nanotubes and p-doped silicon produce a photocurrent when irradiated with visible light under reverse bias conditions. In optoelectronic devices utilizing the heterojunctions, the output current can be controlled completely by both optical and electrical inputs. The heterojunctions provide a platform for heterogeneous optoelectronic logic elements with high voltage-switchable photocurrent, photo-voltage responsivity, electrical ON/OFF ratio, and optical ON/OFF ratio. The devices are combined to make switches, logic elements, and imaging sensors. An assembly of 250,000 sensor elements on a centimeter-scale wafer is also provided, with each sensor element having a heterojunction of single-walled carbon nanotubes and p-doped silicon, and producing a current dependent on both the optical and the electrical input.
Abstract translation: 单壁碳纳米管和p掺杂硅的杂质在反向偏压条件下用可见光照射时产生光电流。 在利用异质结的光电器件中，输出电流可以通过光输入和电输入完全控制。 异质结为具有高电压切换光电流，光电压响应度，电开/关比和光ON / OFF比的异质光电逻辑元件提供了一个平台。 这些器件被组合以制造开关，逻辑元件和成像传感器。 还提供了在厘米级晶片上的25万个传感器元件的组件，每个传感器元件具有单壁碳纳米管和p掺杂硅的异质结，并产生取决于光学和电气输入的电流。
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10.发明授权公开(公告)号：US11832535B2
公开(公告)日：2023-11-28
申请号：US17416094
申请日：2019-12-18
Applicant: Northeastern University
Inventor： Zachariah Boston Hennighausen , Swastik Kar
CPC classification number: H10N70/257 , C09K11/881 , G11C13/04 , H10N70/023 , H10N70/235 , H10N70/8822 , H10N70/8825 , B82Y10/00 , B82Y20/00 , B82Y40/00
Abstract: 2D heterostructures comprising Bi2Se3/MoS2, Bi2Se3/MoSe2, Bi2Se3/WS2, Bi2Se3/MoSe2. 2xS2x, or mixtures thereof in which oxygen is intercalated between the layers at selected positions provide high density storage devices, sensors, and display devices. The properties of the 2D heterostructures can be configured utilizing abeam of electromagnetic waves or particles in an oxygen controlled atmosphere.
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