US 11,788,985 B2
Sensing elements comprising gold nanoparticle-grafted carbon black
Nicolas Levaray, Montreal (CA); Jayan Ozhikandathil, Montreal (CA); Ashok Prabhu Masilamani, Montreal (CA); and Tullio Panarello, Saint-Lazare (CA)
Assigned to Stratuscent Inc., Montreal (CA)
Filed by Stratuscent Inc., Montreal (CA)
Filed on Feb. 7, 2019, as Appl. No. 16/270,412.
Claims priority of provisional application 62/627,533, filed on Feb. 7, 2018.
Prior Publication US 2019/0285570 A1, Sep. 19, 2019
Int. Cl. G01N 27/407 (2006.01); G01N 27/12 (2006.01); G01N 27/04 (2006.01); C09C 1/56 (2006.01); G01N 33/00 (2006.01); C08K 3/08 (2006.01)
CPC G01N 27/4071 (2013.01) [C09C 1/56 (2013.01); G01N 27/127 (2013.01); G01N 33/0047 (2013.01); C08K 2003/0831 (2013.01); G01N 27/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor comprising:
a sensing element comprising a polymer, carbon black, and gold nanoparticles grafted onto the carbon black, wherein the gold nanoparticles grafted onto the carbon black are attached thereto via chemical bonds, a ratio of a weight of the gold nanoparticles to a weight of the carbon black is greater than or equal to 0.25 and less than or equal to 0.5, and a ratio of the weight of the gold nanoparticles to a weight of the polymer is greater than or equal to 0.005 and less than or equal to 0.02; and
a plurality of electrodes electrically coupled to the sensing element, the plurality of electrodes configured to sense a change in a resistivity of the sensing element upon exposure to an analyte.