biostudies-literatureUnknown9(58)Kim YTGraphene has attracted significant attention from researchers in recent years as a gas sensing material, because of its atom-thick 2-D structure, extremely high surface-to-volume ratio, and high carrier mobility. However, chemiresistive gas sensors based on graphene have a drawback of low sensitivity to organophosphates, including dimethyl methylphosphonate (DMMP), a simulant of the nerve agent sarin. In this study, we report the detection of 1.3 ppm DMMP, the highest sensitivity reported to date, using graphene chemiresistors, by non-covalently functionalizing graphene with <i>N</i>-substituted triphenylene. The functionalized graphene sensor exhibits a two orders of magnitude higher response to DMMP than to other compounds. This high sensitivity and selectivity are attributed to the stroRSC advances33976-33980https://www.ebi.ac.uk/biostudies/studies/S-EPMC9073665biostudies-literatureGraphene chemiresistors modified with functionalized triphenylene for highly sensitive and selective detection of dimethyl methylphosphonate.PMC9073665Lee SLee CYKim YTPark SfalseGraphene chemiresistors modified with functionalized triphenylene for highly sensitive and selective detection of dimethyl methylphosphonate.Graphene has attracted significant attention from researchers in recent years as a gas sensing material, because of its atom-thick 2-D structure, extremely high surface-to-volume ratio, and high carrier mobility. However, chemiresistive gas sensors based on graphene have a drawback of low sensitivity to organophosphates, including dimethyl methylphosphonate (DMMP), a simulant of the nerve agent sarin. In this study, we report the detection of 1.3 ppm DMMP, the highest sensitivity reported to date, using graphene chemiresistors, by non-covalently functionalizing graphene with <i>N</i>-substituted triphenylene. The functionalized graphene sensor exhibits a two orders of magnitude higher response to DMMP than to other compounds. This high sensitivity and selectivity are attributed to the stro2019-01-01T00:00:00Z2019 Oct2025-04-26T15:19:23.738Z2025-04-06T14:50:49.53ZS-EPMC90736653552890310.1039/c9ra07186e