Copper phthalocyanine suspended gate field effect transistors for NO2 detection

Hybrid gas sensor platform based on capacitive coupled field effect transistors: Ammonia and nitrogen dioxide detection

“…Comparing our devices with similar ones reported in the literature, one can remark that they are among the most sensitive [10][11][12]15,16,21,22]. However, the high sensitivity was not the leading aim of the performed investigations.…”

“…Because of this disadvantage, the CuPc layers are well suited for alarming purposes, where extremely rare NO 2 exposure events are to be expected. Complementary consideration on this topic can be found in [11].…”

“…During the last decade, many authors tried to optimise or innovate the gas-FET structures [6][7][8][9][10][11][12][13][14][15] and different organic and inorganic materials (metals, metal oxides and organic semiconductors, and even non-conducting polymers), able to produce an electrical potential response when interacting with the target gases, have been deposited on SG and tested as sensing layers [10][11][12][13][14][15][16][17][18][19]. The interest for the field effect gas sensing was continuously increasing so that since 2000, more than 60 referred articles and communications have been published.…”

“…The challenge in the SG-FET sensor design and production nowadays is to provide additional facilities besides a good performance [9,[11][12][13]. In order to compensate the limited selectivity of the sensing materials, sensor combinations or arrays are often required.…”

Very Sensitive Optical System with the Concentration and Decomposition Unit for Explosive Trace Detection

“…Oprea, et al [27] presented an NO2 sensitive suspended gate (SG) FET where the insulator was the air and a sensitive thin layer (copper phthalocyanine -CuPc) was applied on the surface of the metal gate (Au/alumina wafer). The sensors have a low detection limit (<50 ppb) and a good sensitivity (20-70 mV/concentration decade).…”