METHODS AND DEVICES FOR DETECTION OF PATHOGENS

    公开(公告)号:US20190284615A1

    公开(公告)日:2019-09-19

    申请号:US16260773

    申请日:2019-01-29

    IPC分类号: C12Q1/689 G01N33/569 C12Q1/04

    摘要: In one aspect, a method of detecting a pathogen, e.g., listeria bacterium, chlamydia bacteria, gonorrhea bacteria and/or HPV, in a sample is disclosed, which comprises bringing a sample into contact with a graphene layer functionalized with an antibody exhibiting specific binding to the pathogen, monitoring electrical resistance of said antibody-functionalized graphene layer in response to interaction with said sample, and detecting presence of the pathogen in said sample by detecting a change in said electrical resistance indicative of interaction of the pathogen with said antibody-functionalized graphene layer. For example, a decrease of the electrical resistance of the graphene layer can indicate the presence of the pathogen in the sample under study. In some embodiments, a method according to the present teachings is capable of detecting pathogens, such as listeria bacteria, chlamydia bacteria, gonorrhea bacteria and HPV in a sample at a concentration as low as 4 cfu per 100 grams of a sample.

    Functionalized Sensor for Detection of Biomarkers

    公开(公告)号:US20200011860A1

    公开(公告)日:2020-01-09

    申请号:US16422743

    申请日:2019-05-24

    IPC分类号: G01N33/543 B01L3/00 G01N27/12

    摘要: In one aspect, the present teachings provide a sensor for detecting troponin, e.g., cardiac troponin in a patient's blood, that relies on an electronic signature generated via interaction of troponin with an anti-troponin antibody. More specifically, as discussed in more detail below, such a sensor can include a graphene layer disposed on an underlying substrate, where the graphene layer has been functionalized with an anti-troponin antibody. The interaction of troponin in a sample, e.g., a patient's blood, with the anti-troponin antibody coupled, e.g., anchored, to the graphene substrate, can modulate an electronic property of the underlying graphene layer. The modulation of the electronic property of the graphene layer can be measured and used to identify, and in some embodiments quantify, troponin in the sample.