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엄완식 ( Wansik Oum ),신가윤 ( Ka Yoon Shin ),유동재 ( Dong Jae Yu ),강석우 ( Sukwoo Kang ),김은비 ( Eun Bi Kim ),김현우 ( Hyoun Woo Kim ) 한국센서학회 2021 센서학회지 Vol.30 No.6
Light-activated metal oxide gas sensors have been investigated in recent decades. Light illumination enhances the sensing attributes, including the operational temperature, sensitivity, and selectivity. Unfortunately, high operating temperature is a major problem for gas sensors because of the huge energy consumption. Therefore, the importance of light-activated room-temperature sensing has increased. This paper reviews recent light-activated sensors and their sensing mechanisms with a specific focus on metal oxide gas sensors. Studies use the outstanding ZnO and SnO<sub>2</sub> sensors to research photoactivation when illuminated by various sources such as ultraviolet (UV), halogen lamp, or monochromatic light. Photon induction generates electron-hole pairs that increase the number of adsorption sites of gas molecules and ions improving the sensor’s sensing properties.
신가윤 ( Ka Yoon Shin ),엄완식 ( Wansik Oum ),유동재 ( Dong Jae Yu ),강석우 ( Sukwoo Kang ),김은비 ( Eun Bi Kim ),김현우 ( Hyoun Woo Kim ) 한국센서학회 2021 센서학회지 Vol.30 No.6
Cyclic voltammetry (CV) is a powerful electrochemical measurement technique that can determine redoxable substances in a solution. The advantage of CV is that we can observe redox behavior over a wide potential range in a short time. Because of its practicality and versatility, CV is used not only in electrochemistry but also in various fields of chemistry, such as inorganic chemistry, organic chemistry, and biochemistry. As technology advances and the popularity of CV grows, the need for trained electrochemists also increases. However, most students do not receive formal training in these technologies as part of their curriculum. There are few concise and accessible resources for learning CV. Therefore, this manuscript provides a brief introduction to cyclic voltammetry to aid readers in collecting and interpreting useful data from cyclic voltammograms.