Northeastern University

Massachusetts Institute of Technology

Swastik Kar

Yung Joon Jung

Daniel Rubin

Ji Hao

Meni Wanunu

Joseph Larkin

Hyun Young Jung

Zachariah Boston Hennighausen

Pradeep Waduge

Ismail Bilgin

Mildred S Dresselhaus

Sarah Ostadabbas

Bo Li

Moneesh Upmanyu

Arun Bansil

Paulo Antonio Trindade Araujo

Gianina Buda

Anthony Vargas

Davoud Hejazi

Fangze Liu

Christopher Adrian Lane

Chi Won Ahn

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.

Device and method for color indentification

2D heterostructures comprising BiSe/MoS, BiSe/MoSe, BiSe/WS, BiSe/MoSe.S, 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.

Two dimensional materials for use in ultra high density information storage and sensor devices

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.

Ion and radiation detection devices based on carbon nanomaterials and two-dimensional nanomaterials

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 10carriers/cm. A variety of novel ion-doped nanomaterials and p-n junction-based nanoelectronic devices are made possible by the method.

Ion-doped two-dimensional nanomaterials

Heterocrystals of metal dichalcogenides and BiS, BiSeor BiTeare presented, in which the metal dichalcogenides and BiS, BiSeor BiTedo 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.

Tunable and reconfigurable atomically thin heterostructures

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.

Low noise ultrathin freestanding membranes composed of atomically-thin 2D materials

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.

Fabrication of carbon nanoribbons from carbon nanotube arrays

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.

Ultrasensitive ion detector using carbon nanotubes or graphene

Growing community of inventors

Belmont, MA, United States of America

Swastik Kar