Shaik Mahabul, Rao V Kameswara, Ramana G V, Halder M, Gutch P K, Pandey P, Jain R
Defence Research & Development Establishment Gwalior 474002 M.P. India
Nanospan Catalyst - A T-hub Building, IIIT Campus, Gachibowli Hyderabad Telangana 500032 India.
RSC Adv. 2018 Feb 21;8(15):8240-8245. doi: 10.1039/c7ra12272a. eCollection 2018 Feb 19.
The detection of DMMP (dimethyl methylphosphonate, a simulant of nerve agent sarin) was performed by using -hexafluoroisopropanol phenyl (HFIPP) functionalized graphene (GR) hydrogen bond interactions. For this, the HFIPP moiety was covalently functionalized on the surface of GR by a diazo reaction. The HFIPP-GR film-modified QCM electrodes were fabricated and their sensing characteristics towards DMMP were investigated. The proposed sensor showed good response towards sensing DMMP vapor at room temperature. In order to see the effect of HFIPP derivatives on DMMP vapor sensing, a comparative study was also conducted with unfunctionalized graphene. The sensitivity and detection limit of the HFIPP-GR sensor against DMMP vapors were 12.24 Hz ppm and 150 ppb respectively. The HFIPP-GR coated sensors showed good selectivity towards sensing DMMP vapors when compared with common organic vapors.
通过利用六氟异丙醇苯基（HFIPP）功能化石墨烯（GR）的氢键相互作用来检测二甲基甲基膦酸酯（DMMP，一种神经毒剂沙林的模拟物）。为此，通过重氮反应将HFIPP部分共价功能化在GR表面。制备了HFIPP-GR薄膜修饰的石英晶体微天平（QCM）电极，并研究了它们对DMMP的传感特性。所提出的传感器在室温下对DMMP蒸气传感表现出良好的响应。为了观察HFIPP衍生物对DMMP蒸气传感的影响，还与未功能化的石墨烯进行了对比研究。HFIPP-GR传感器对DMMP蒸气的灵敏度和检测限分别为12.24 Hz/ppm和150 ppb。与常见有机蒸气相比，HFIPP-GR涂层传感器对DMMP蒸气传感表现出良好的选择性。
