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.

公开(公告)号：US11325343B2

公开(公告)日：2022-05-10

申请号：US16484024

申请日：2017-09-11

Applicant: Northeastern University

Inventor： Swastik Kar ,  Ji Hao ,  Daniel Rubin ,  Yung Joon Jung

IPC: B32B5/16 ,  C01B32/194 ,  H01L29/06 ,  B82Y30/00 ,  B82Y40/00

Abstract: Ion-doped two-dimensional nanomaterials are made by inducing electronic carriers (electrons and holes) in a two-dimensional material using a captured ion layer at the surface of the material. The captured ion layer is stabilized using a capping layer. The induction of electronic carriers works in atomically-thin two-dimensional materials, where it induces high carrier density of at least 1014 carriers/cm2. A variety of novel ion-doped nanomaterials and p-n junction-based nanoelectronic devices are made possible by the method.

公开(公告)号：US10036728B2

公开(公告)日：2018-07-31

申请号：US14441218

申请日：2013-11-12

Applicant: Northeastern University

Inventor： Bo Li ,  Ji Hao ,  Hyun Young Jung ,  Yung Joon Jung ,  Swastik Kar

IPC: G01N27/70 ,  G01N27/62 ,  H01J41/02 ,  H01J47/02 ,  H01J49/02

CPC classification number: G01N27/70 ,  G01N27/62 ,  H01J41/02 ,  H01J47/02 ,  H01J49/025

Abstract: An ion detection device has a strip of carbon-based nanomaterial (CNM) film and a chamber enclosing the CNM film. A low bias voltage is applied at the ends of the CNM film strip, and ions present in the chamber are detected by a change in the magnitude of current flowing through the CNM film under the bias. Also provided are methods for fabricating the device, methods for measuring pressure of a gas, and methods for monitoring or quantifying an ionizing radiation using the device.