Enhanced sensitivity of langasite-based surface acoustic wave CO gas sensor using highly porous Ppy@PEDOT:PSS hybrid nanocomposite

Pasupuleti, Kedhareswara Sairam; Bak, Na-hyun; Peta, Koteswara Rao; Kim, Song-Gang; Cho, Hak Dong; Kim, Moon‐Deock

doi:10.1016/j.snb.2022.131786

Cited by 20 publications

(33 citation statements)

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“…27 The charge transfer between the polymer matrix and the evolved functional groups of the OAN/p-HPA composite provides active surface sites, which further help improve the gas molecule absorption. 27,50 3.3. IGC Study.…”

Section: Surface Characteristicsmentioning

confidence: 99%

“…The linearity of R 2 = 0.985 clearly indicates that polymeric composite sensor has a more reliable and stable CO gas sensing performance. 27,47 The repeatability and cycling stability of OAN/p-HPA sensor were tested under 100 ppm CO gas at RT as shown in Figure 6d. The composite sensor exhibited a stable sensitivity response to CO gas for five repeatable cycles without any loss in sensor sensitivity.…”

Section: Surface Characteristicsmentioning

confidence: 99%

“…This resulted in hindering the gas sensing reactivity between the target gas and the sensing material surface layer. 27 3.5. Mechanism.…”

Section: Surface Characteristicsmentioning

confidence: 99%

“…28,29 The characteristics of CO gas such as being odorless, colorless and tasteless, have required development of a highly sensitive sensor using polymer composites with high selectivity, reproducibility and sensitive detection at RT. 27,29,30 Herein, we demonstrate the surface thermodynamic characteristics of OAN, p-HPA and OAN/p-HPA composites by IGC. Three polymeric samples are characterized for RT CO gas detection in terms of surface area, porosity, and functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…30,31 The synergetic combination of OAN and p-HPA composites can produce strong interfacial bonding between polymeric chains that further actively participate in the CO gas adsorption, leading to a change in electrical resistance. 27 To the best of our knowledge, the current work is the first report that discusses the surface thermodynamic characteristics using IGC and practical RT CO gas sensing application using OAN, p-HPA and OAN/p-HPA composites.…”

Section: Introductionmentioning

confidence: 99%

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Surface Thermal Behavior and RT CO Gas Sensing Application of an Oligoacenaphthylene with p-Hydroxyphenylacetic Acid Composite

et al. 2022

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The current work describes room-temperature gas sensing performances using an oligoacenaphthylene (OAN)/p-hydroxyphenylacetic acid (p-HPA) composite. Based on inverse gas chromatography (IGC), the London dispersive surface energy γ s d is calculated by using 14 representative models. Even when the γ s d values of both OAN and the OAN/p-HPA composite are decreased as the temperature increases, the surface of OAN shows a higher value than that of the composite. The Gibbs surface free energy values of both are decreased with an increasing temperature. In our results, higher Lewis basic characters are observed in OAN and the OAN/p-HPA composite and the OAN/p-HPA surface exhibits a higher basicity compared to OAN. Because of the presence of phenolic groups in the OAN/p-HPA composite, the more important basic character drives a significant CO gas sensing ability with a sensitivity of 8.96% and good cycling stability as compared to the pristine counterparts. It is expected that the current study sheds light on a new pathway to exploring polymer composite materials for futuristic diverse and multiple applications, including IGC and gas sensor applications.

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Section: Surface Characteristicsmentioning

confidence: 99%

Section: Surface Characteristicsmentioning

confidence: 99%

“…This resulted in hindering the gas sensing reactivity between the target gas and the sensing material surface layer. 27 3.5. Mechanism.…”

Section: Surface Characteristicsmentioning

confidence: 99%