Redox sorting of carbon nanotubes

    公开(公告)号:US10858256B2

    公开(公告)日:2020-12-08

    申请号:US15545659

    申请日:2016-01-22

    摘要: A method of separating and extracting carbon nanotubes, the method includes introducing the carbon nanotubes into a two-phase system that includes a first component and a second component, the first component being different from the second component. The method includes introducing a chemical agent into the two-phase system, mixing the chemical agent and the carbon nanotubes in the two-phase system, removing the first component to extract a first portion of the carbon nanotubes contained in the first component after the mixing, replenishing the two-phase system with fresh first component, and extracting a second portion of the carbon nanotubes contained in the fresh first component. A bandgap of the carbon nanotubes in the first portion is different from the bandgap of the carbon nanotubes in the second portion.

    Black phosphorus gas sensor
    6.
    发明授权

    公开(公告)号:US10648959B2

    公开(公告)日:2020-05-12

    申请号:US15587914

    申请日:2017-05-05

    摘要: The inventors experimentally demonstrated NO2 gas sensing performance of multilayer black phosphorous (BP) field effect transistors. The BP sensors were sensitive to NO2 concentration down to 5 ppb making them comparable in sensitivity to the best 2D material based sensors. Raman spectroscopy comparison revealed no apparent change in the spectra before and after exposure to NO2, which shows that thick BP flakes can maintain their relative stability after sensing. Moreover, the BP device sensing performance fitted well with the Langmuir Isotherm for molecules adsorbed on a surface, which confirms charge transfer as the dominant mechanism for sensing. The systematic increase in conductance with increasing NO2 concentrations suggests NO2 molecules withdraw electrons and dope BP flakes with holes. These results lay the ground work for BP to be applied to various sensing applications including chemical, gas, and bio-sensors.

    Coating Particles
    7.
    发明申请
    Coating Particles 审中-公开
    涂层颗粒

    公开(公告)号:US20140356721A1

    公开(公告)日:2014-12-04

    申请号:US14291552

    申请日:2014-05-30

    IPC分类号: H01M4/36

    摘要: A method includes combining a coating material and an uncoated particulate core material in a solution having a selected ionic strength. The selected ionic strength promotes coating of the uncoated particulate core material with the coating material to form coated particles; and the coated particles can be collected after formation. The coating material has a higher electrical conductivity than the core material.

    摘要翻译: 一种方法包括将涂层材料和未涂覆的颗粒芯材料组合在具有选定离子强度的溶液中。 选择的离子强度促进未涂覆的颗粒芯材料与涂层材料的涂层以形成涂覆的颗粒; 并且可以在形成后收集涂覆的颗粒。 涂层材料具有比芯材更高的导电性。