公开(公告)号：US20220144662A1

公开(公告)日：2022-05-12

申请号：US17523861

申请日：2021-11-10

Applicant: Northeastern University

Inventor： Davoud HEJAZI ,  Swastik KAR ,  Renda TAN

IPC: C01G39/06

Abstract: Methods for making of nanomaterials from a bulk source material involve heating the material in an inert atmosphere, whereby a material having at least one nanometer scale dimension is formed on a nearby substrate surface. The heated bulk source material forms a vapor phase which is deposited in the form of the nanomaterial on a growth surface of the substrate. The methods require no complex machinery or devices, unlike chemical vapor deposition, and can be tuned to provide different forms of nanomaterials, such as two-dimensional or other crystalline forms. The methods can be used to make two-dimensional semiconductor materials and semiconductor devices.

公开(公告)号：US20220412804A1

公开(公告)日：2022-12-29

申请号：US17777091

申请日：2020-11-16

Applicant: Northeastern University

Inventor： Swastik KAR ,  Davoud HEJAZI ,  Sarah OSTADABBAS

IPC: G01J3/46 ,  G01J3/51

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.

公开(公告)号：US20230332955A1

公开(公告)日：2023-10-19

申请号：US18126364

申请日：2023-03-24

Applicant: Northeastern University

Inventor： Swastik KAR ,  Davoud HEJAZI ,  Sarah OSTADABBAS

IPC: G01J3/51

CPC classification number: G01J3/51 ,  G01J2003/466

Abstract: The present technology provides devices and methods to determine the spectrum or other spectral characteristic, such as color, of a beam of light or other electromagnetic radiation. The beam of light or other electromagnetic radiation is modified without dispersion by broadband transmissive windows and then transmitted onto a detector. Signals from the detector are measured from a training set of radiation having known spectra and used to train the device, after which the device can estimate the spectrum or color of an unknown light or other electromagnetic radiation with exceptionally high accuracy.