An electronic nose(e-nose)is a device that can detect and recognize odors and flavors using a sensor array.It has received considerable interest in the past decade because it is required in several areas such as healt...An electronic nose(e-nose)is a device that can detect and recognize odors and flavors using a sensor array.It has received considerable interest in the past decade because it is required in several areas such as health care,environmental monitoring,industrial applications,automobile,food storage,and military.However,there are still obstacles in developing a portable e-nose that can be used for a wide variety of applications.For practical applications of an e-nose,it is necessary to collect a massive amount of data from various sensing materials that can transduce interactions with molecules reliably and analyze them via pattern recognition.In addition,the possibility of miniaturizing the e-nose and operating it with low power consumption should be considered.Moreover,it should work efficiently over a long period of time.To satisfy these requirements,several different chemoresistive material platforms including metal oxides,organics such as polymers and carbonbased materials,and two-dimensional materials were investigated as sensor elements for an e-nose.As an individual material has limited selectivity,there is a continuing effort to improve the selectivity and gas sensing properties through surface decoration and compositional and structural variations.To produce a reliable e-nose,which can be used for practical applications,researches in various fields have to be harmonized.This paper reviews the progress of research on e-noses based on a chemoresistive gas sensor array and discusses the inherent challenges and potential solutions.展开更多
基金supported by the Ministry of Science,ICT&Future Planning(2017R1A2B3009135)the Nano-Material Technology Development Program(2016M3A7B4910)through the National Research Foundation of Korea.
文摘An electronic nose(e-nose)is a device that can detect and recognize odors and flavors using a sensor array.It has received considerable interest in the past decade because it is required in several areas such as health care,environmental monitoring,industrial applications,automobile,food storage,and military.However,there are still obstacles in developing a portable e-nose that can be used for a wide variety of applications.For practical applications of an e-nose,it is necessary to collect a massive amount of data from various sensing materials that can transduce interactions with molecules reliably and analyze them via pattern recognition.In addition,the possibility of miniaturizing the e-nose and operating it with low power consumption should be considered.Moreover,it should work efficiently over a long period of time.To satisfy these requirements,several different chemoresistive material platforms including metal oxides,organics such as polymers and carbonbased materials,and two-dimensional materials were investigated as sensor elements for an e-nose.As an individual material has limited selectivity,there is a continuing effort to improve the selectivity and gas sensing properties through surface decoration and compositional and structural variations.To produce a reliable e-nose,which can be used for practical applications,researches in various fields have to be harmonized.This paper reviews the progress of research on e-noses based on a chemoresistive gas sensor array and discusses the inherent challenges and potential solutions.
