Healin Im1,2,Jihho Kim3,Zakaria Al Balushi1,Donghyuk Park3,Sunkook Kim2
University of California, Berkeley1,Sungkyunkwan University2,Inha University3
Healin Im1,2,Jihho Kim3,Zakaria Al Balushi1,Donghyuk Park3,Sunkook Kim2
University of California, Berkeley1,Sungkyunkwan University2,Inha University3
Artificial olfaction conceives multigas sensor arrays for gas-fingerprint pattern recognition, which is attributed to its specificity for multiple gases. It is a series of interactive sensor arrays compatible with electronic circuits and data analysis software from a sensor architecture perspective. It can sense and transform information on gas mixtures into readable digital outputs and compute their concentration based on statistical models. Herein, we develop colorimetric multigas sensor arrays assembling chemo-reactive fluorescent porous nanofibers and 10 <!--[if gte msEquation 12]><m:oMath><i style='mso-bidi-font-style: normal'><span lang=EN-US style='font-family:"Cambria Math",serif;mso-fareast-font-family: "맑은 고딕";mso-fareast-language:KO'><m:r>×</m:r></span></i></m:oMath><![endif]--><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/></v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:8.4pt; height:28.2pt'> <v:imagedata src="file:///C:/Users/LGE1/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png" o:title="" chromakey="white"/></v:shape><![endif]--> 10 IGZO phototransistor arrays as a next-generation artificial olfactory platform to recognize five different volatile organic compounds (VOCs). Porous nanofibers, coupled with two different organic emitters and emitting fluorescence, rapidly respond to gas-phased VOCs and offer a prominent fluorescent alarm. In addition, the composition between fluorophores and polymers provides a selectivity against VOCs. The VOCs-induced variation in fluorescence of nanofibers is quantified and amplified by IGZO phototransistor arrays, resulting in the gas-fingerprint patterns in terms of electrical signals. Thus, the pattern library associated with VOCs and their concentration enables us to determine each airborne analyte as the artificial olfactory platform. Therefore, this system could achieve rapid, early quantitative recognition of hazardous gases and be applied as a preventative, portable, and wearable multigas identifier in various fields.