تهيه حسگر گازي مقاومت شيميايي بر پايه گرافن اكسيد عامل‌دار شده براي آشكارسازي 2،4-دي‌نيتروتولوئن

Graphene oxide microsensors for 2,4-Dinitrotoluene detection

ﺗﺤﻘﯿﻖ و ﭘﮋوھﺶ در زﻣﯿﻨﮫ آﺷﮑﺎرﺳﺎزي ﻣﻮاد ﻣﻨﻔﺠﺮه، ﺑﺎ ﺗﻮﺟﮫ ﺑﮫ اﻓﺰاﯾﺶ اﺳﺘﻔﺎده از اﯾﻦ ﻣﻮاد در ﺣﻤﻼت ﺗﺮورﯾﺴﺘﯽ رو ﺑﮫ ﮔﺴﺘﺮش ﻣﯽﺑﺎﺷﺪ. در اﯾﻦ ﻣﻘﺎﻟﮫ ﺣﺴﮕﺮ ﻣﻘﺎوﻣﺖ ﺷﯿﻤﯿﺎﯾﯽ اﻟﮑﺘﺮود ﺷﺎﻧﮫ اي ﺑﺮ ﭘﺎﯾﮫ ﮔﺮاﻓﻦ اﮐﺴﯿﺪ ﻋﺎﻣﻞ دار ﺷﺪه ﺑﺎ 5،5،4،4،3،3،2،2- اﮐﺘﺎﻓﻠﻮرو-6،1-ھﮕﺰاندياُل اراﺋﮫ ﺷﺪه اﺳﺖ و ﭘﺎﺳﺦ آن ﺑﮫ 2،4-ديﻧﯿﺘﺮوﺗﻮﻟﻮﺋﻦ )DNT( ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘه اﺳﺖ. ﭘﺎﺳﺦ ﺣﺴﮕﺮ ﺑﺎ اﻓﺰودن ﻻﯾﮫ ﺛﺎﻧﻮي ﭘﻮﺷﺶ دھﻨﺪه ﺑﺮ روي ﺣﺴﮕﺮ ﮔﺮاﻓﻦ اﮐﺴﯿﺪ ﻋﺎﻣﻞ دار ﺷﺪه، اﻓﺰاﯾﺶ ﺣﺴﺎﺳﯿﺖ و ﮔﺰﯾﻨﺶ ﭘﺬﯾﺮي ﻗﺎﺑﻞ ﺗﻮﺟﮭﯽ را از ﺧﻮد ﻧﺸﺎن داد. ﮔﺴﺘﺮه ﭘﺎﺳﺦ ﺧﻄﯽ ﺑﺮاي ppb ،DNT 91/8-918 ﺑﺎ ﺣﺪ ﺗﺸﺨﯿﺺ ppb 91/8 ﺑﮫ دﺳﺖ آﻣﺪ. اﻧﺤﺮاف اﺳﺘﺎﻧﺪار ﻧﺴﺒﯽ ﺑﺮاي 3 ﺑﺎر ﺗﮑﺮارﭘﺬﯾﺮي ﭘﺎﺳﺦﺣﺴﮕﺮ ﻧﯿﺰ ﻣﻘﺪار 6/09 درﺻﺪ ﻣﺤﺎﺳبه شد.

Research in the field of explosives detection due to the increased use of these materials in terrorist attacks is growing. In this paper, a chemiresistor gas sensor based on Graphene oxide functionalized with 2,2,3,3,4,4,5,5-Octafluoro-1,6-hexanediol is provided and its response to 2,4-Dinitrotoluene is studied. response of the sensor by adding the second coating layer on the functionalized graphene oxide show considerable increase the sensitivity and selectivity of the sensor .Linear response range for DNT, 91.8-918 ppb with a detection limit 76 ppb is obtained. Also the RSD to evaluate the repeatability of sensor for 3 replicate measurements was 6.09%.