US 12,442,784 B2
Chemiresistive sensor for detecting NO2
Maria Carmen Horrillo Güemes, Madrid (ES); Daniel Matatagui Cruz, Madrid (ES); Maria Pilar Marin Palacios, Las Rozas de Madrid (ES); Elena Navarro Palma, Madrid (ES); Jesús Löpez Sánchez, Las Rozas de Madrid (ES); and Álvaro Peña Moreno, Las Rozas de Madrid (ES)
Assigned to CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS, Madrid (ES); and UNIVERSIDAD COMPLUTENSE DE MADRID, Madrid (ES)
Appl. No. 18/015,474
Filed by CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS, Madrid (ES); and UNIVERSIDAD COMPLUTENSE DE MADRID, Madrid (ES)
PCT Filed Jul. 9, 2021, PCT No. PCT/ES2021/070499
§ 371(c)(1), (2) Date Jun. 26, 2023,
PCT Pub. No. WO2022/008782, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. ES202030712 (ES), filed on Jul. 10, 2020.
Prior Publication US 2024/0035996 A1, Feb. 1, 2024
Int. Cl. G01N 27/12 (2006.01); G01N 33/00 (2006.01)
CPC G01N 27/125 (2013.01) [G01N 33/0027 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A resistive chemical sensor for detection of NO2 comprising:
an insulating substrate;
at least two metallic electrodes on the insulating substrate;
at least one active layer located on the substrate and the electrodes, connecting said metallic electrodes, wherein the active layer has a thickness between 20 nm and 100 μm and is made up of particles of a size between 20 nm and 1000 nm agglomerated and nanostructured in nanodomains, where said nanodomains are of non-oxidized graphene with few atomic layers, wherein said graphene contains structural defects, and wherein said defects are carbon vacancies in the structure of graphene with few atomic layers.