US 12,247,945 B2
Sensors including redox-active selector complexes
Timothy M. Swager, Newton, MA (US); Suchol Savagatrup, Cambridge, MA (US); Vera Schroder, Cambridge, MA (US); Maggie He, Cambridge, MA (US); Sibo Lin, Cambridge, MA (US); Xi-Xiang Zhang, Thuwal (SA); and Khaled N. Salama, Thuwal (SA)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US); and King Abdullah University of Science and Technology, Thuwal (SA)
Filed by MASSACHUSETTS INSTITUTE OF TECHNOLOGY, Cambridge, MA (US); and KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY, Thuwal (SA)
Filed on Sep. 14, 2018, as Appl. No. 16/132,336.
Claims priority of provisional application 62/560,186, filed on Sep. 18, 2017.
Prior Publication US 2019/0086360 A1, Mar. 21, 2019
Int. Cl. G01N 27/414 (2006.01); G01N 27/30 (2006.01); G01N 27/48 (2006.01); G01N 33/00 (2006.01)
CPC G01N 27/4141 (2013.01) [G01N 27/308 (2013.01); G01N 27/4146 (2013.01); G01N 27/48 (2013.01); G01N 33/004 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor comprising:
a conductive region in electrical communication with at least three electrodes,
the electrodes insulated and separated from each other with a dielectric layer having an adhesion layer thereon, the electrodes including source-drain electrodes, and
the conductive region including a conductive material and an in situ activated redox-active selector comprising a metalloporphyrin, the metalloporphyrin immobilized with respect to a carbon nanotube in the conductive material by a ligand that is covalently bound to the carbon nanotube, the redox-active selector responsive to an applied gate voltage that transiently reduces the redox-active selector such that the in situ activated redox-active selector is configured to bind an analyte more readily in a first redox state compared to a second redox state, the sensor having a selectivity to ppm levels of carbon monoxide in air and being operational in air.