US 12,392,747 B2
PH sensing technique based on graphene electrodes
Alan T Johnson, Jr., Philadelphia, PA (US); and Jinglei Ping, Gaithersburg, MD (US)
Assigned to The Trustees of the University of Pennsylvania, Philadelphia, PA (US)
Filed by The Trustees of the University of Pennsylvania, Philadelphia, PA (US)
Filed on Apr. 1, 2022, as Appl. No. 17/711,134.
Application 17/711,134 is a continuation of application No. 16/085,014, granted, now 11,327,041, previously published as PCT/US2017/022103, filed on Mar. 13, 2017.
Claims priority of provisional application 62/308,069, filed on Mar. 14, 2016.
Prior Publication US 2023/0051545 A1, Feb. 16, 2023
Int. Cl. G01N 27/30 (2006.01); G01N 27/416 (2006.01); G01N 27/36 (2006.01)
CPC G01N 27/308 (2013.01) [G01N 27/302 (2013.01); G01N 27/4167 (2013.01); G01N 27/36 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A sensor device, comprising:
a first graphene electrode in electric communication with a first conductive contact;
a second graphene electrode in electric communication with a second conductive contact; and
a processing train configured to measure (i) Faradaic charge transfer between the first graphene electrode and a sample in contact with the first graphene electrode and (ii) Faradaic charge transfer between the second electrode and a second sample in contact with the second graphene electrode,
the processing train determining an electronic characteristic of the first sample from the Faradaic charge transfer between the first graphene electrode and the first sample, and
the processing train determining an electronic characteristic of the second sample from the Faradaic charge transfer between the second graphene electrode and the second sample.