公开(公告)号：US11650144B2

公开(公告)日：2023-05-16

申请号：US17173877

申请日：2021-02-11

Applicant: Colorado State University Research Foundation ,  Purdue Research Foundation

Inventor： Su-Jung (Candace) Tsai ,  Doosan Back ,  David B. Janes

IPC: G01N15/06 ,  G01N15/00 ,  G01N15/10 ,  G01N15/12

CPC classification number: G01N15/10 ,  G01N15/0606 ,  G01N15/0656 ,  G01N2015/0038 ,  G01N2015/0046 ,  G01N2015/1087 ,  G01N2015/1254

Abstract: Aspects of the present disclosure involve systems, methods, and the like, for a fabrication of a particulate matter (PM) sensor that utilizes a capacitance sensor to detect sub-micrometer and nanoparticles in the respirable range of an environment. In one implementation, the capacitance sensor may comprise interdigitated electrodes between which a capacitance may be measured. PM deposited on the sensor may cause the capacitance between the electrodes to be altered and such a change in capacitance may be measured by the PM sensor. This measurement of the change in capacitance of the interdigitated capacitance sensor may therefore be correlated to the presence of sub-micrometer and nanoparticles in an environment. In one particular implementation, the PM sensor may further include a micro-heater circuit, a readout circuit, and an interface connecting the readout circuit to the micro-heater/capacitance sensor of the PM sensor.

公开(公告)号：US10468151B2

公开(公告)日：2019-11-05

申请号：US15332938

申请日：2016-10-24

Applicant: PURDUE RESEARCH FOUNDATION

Inventor： Muhammad Ashraful Alam ,  Ruiyi Chen ,  Suprem R. Das ,  David B. Janes ,  Changwook Jeong ,  Mark Lundstrom

IPC: H01B1/02 ,  B82Y40/00 ,  B32B15/16 ,  G02F1/1343 ,  H01L31/0224 ,  H01L51/44 ,  H01L31/18 ,  H01B1/04 ,  B82Y10/00 ,  H01L29/16 ,  H01L29/41 ,  H01L31/028

Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.

公开(公告)号：US11967629B2

公开(公告)日：2024-04-23

申请号：US17253180

申请日：2019-06-22

Applicant: Kansas State University Research Foundation ,  Purdue Research Foundation

Inventor： Suprem R. Das ,  David B. Janes ,  Jiseok Kwon

IPC: H01L21/02 ,  H01L29/24 ,  H01L29/43 ,  H01L29/66 ,  H01L29/76

CPC classification number: H01L29/435 ,  H01L21/02568 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/7606

Abstract: A semiconductor device and methods of fabricating and using the same are provided. The semiconductor device comprises a channel region and at least a first, second, and third electrode. The channel region includes a compound having a transition metal and a chalcogen. The thickness of the channel region is about 3 to about 40 atomic layers.

公开(公告)号：US11515057B2

公开(公告)日：2022-11-29

申请号：US17062788

申请日：2020-10-05

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Ruiyi Chen ,  Suprem R. Das ,  David B. Janes ,  Changwook Jeong ,  Mark Lundstrom

IPC: H01B1/02 ,  H01B1/04 ,  H01L31/0224 ,  B82Y40/00 ,  G02F1/1343 ,  H01L31/18 ,  H01L51/44 ,  B82Y10/00 ,  H01L29/41 ,  H01L29/16 ,  H01L31/028

Abstract: Hybrid transparent conducting materials are disclosed which combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and the conductive nanostructures preferably are silver nanowires.

公开(公告)号：US20210247290A1

公开(公告)日：2021-08-12

申请号：US17173877

申请日：2021-02-11

Applicant: Colorado State University Research Foundation ,  Purdue Research Foundation

Inventor： Su-Jung (Candace) Tsai ,  Doosan Back ,  David B. Janes

IPC: G01N15/10

Abstract: Aspects of the present disclosure involve systems, methods, and the like, for a fabrication of a particulate matter (PM) sensor that utilizes a capacitance sensor to detect sub-micrometer and nanoparticles in the respirable range of an environment. In one implementation, the capacitance sensor may comprise interdigitated electrodes between which a capacitance may be measured. PM deposited on the sensor may cause the capacitance between the electrodes to be altered and such a change in capacitance may be measured by the PM sensor. This measurement of the change in capacitance of the interdigitated capacitance sensor may therefore be correlated to the presence of sub-micrometer and nanoparticles in an environment. In one particular implementation, the PM sensor may further include a micro-heater circuit, a readout circuit, and an interface connecting the readout circuit to the micro-heater/capacitance sensor of the PM sensor.

公开(公告)号：US20210280685A1

公开(公告)日：2021-09-09

申请号：US17253180

申请日：2019-06-22

Applicant: Kansas State University Research Foundation ,  Purdue Research Foundation

Inventor： Suprem R. Das ,  David B. Janes ,  Jiseok Kwon

IPC: H01L29/43 ,  H01L29/24 ,  H01L29/76 ,  H01L21/02 ,  H01L29/66

Abstract: A semiconductor device and methods of fabricating and using the same are provided. The semiconductor device comprises a channel region and at least a first, second, and third electrode. The channel region includes a compound having a transition metal and a chalcogen. The thickness of the channel region is about 3 to about 40 atomic layers.