NOVELTY - Aerogel comprises: supramolecular structures bound to one another, where each supramolecular structure comprises (a) a carbon nanotube (CNT) or a graphene comprising structure having an outer surface, and (b) polymers or aromatic molecules secured to the outer surface of the CNT or the graphene comprising structure, where the polymers or aromatic molecules have at least one crosslinkable structure, and the supramolecular structures are crosslinked together by chemical bonding between crosslinkable structures.    USE - The aerogel structure is useful in an aerogel-based sensor (claimed) and aerogels numerous applications including pressure sensors, chemical sensors, catalyst supports such as in low temperature fuel cell, and electrodes, such as electrodes for supercapacitors.    ADVANTAGE - The unique aerogel structure exhibits excellent mechanical properties, and high electrical conductivity.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) forming the CNT or graphene comprising structure-based aerogel, comprising mixing polymers or aromatic molecules, a solvent, and the CNTs or the graphene to form a mixture, forming a solid gel comprising the supramolecular structures from the mixture, where the solid gel includes a portion of the solvent trapped in it, crosslinking the supramolecular structures, and drying, after the crosslinking, to remove the solvent trapped in it to form the CNT or the graphene comprising structure-based aerogel; and    (2) an aerogel-based sensor, comprising an aerogel sensing element comprising supramolecular structures bound to one another, and polymers or aromatic molecules secured to the outer surface of the CNT or the graphene, a readout circuit coupled across the aerogel sensing element for reading out resistance data, and a processor coupled to the readout circuit for receiving the resistance data, where the processor has an associated memory including calibration data relating to the resistance data to a parameter to be sensed, and the processor calculates a value for the parameter to be sensed.