首页|Portable FBAR based E-nose for cold chain real-time bananas shelf time detection

Portable FBAR based E-nose for cold chain real-time bananas shelf time detection

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Being cheap,nondestructive,and easy to use,gas sensors play important roles in the food industry.However,most gas sensors are suitable more for laboratory-quality fast testing rather than for cold-chain continuous and cumulative testing.Also,an ideal electronic nose(E-nose)in a cold chain should be stable to its surroundings and remain highly accurate and portable.In this work,a portable film bulk acoustic resonator(FBAR)-based E-nose was built for real-time measurement of banana shelf time.The sensor chamber to contain the portable circuit of the E-nose is as small as a smartphone,and by introducing an air-tight FBAR as a reference,the E-nose can avoid most of the drift caused by surroundings.With the help of porous layer by layer(LBL)coating of the FBAR,the sensitivity of the E-nose is 5 ppm to ethylene and 0.5 ppm to isoamyl acetate and isoamyl butyrate,while the detection range is large enough to cover a relative humidity of 0.8.In this regard,the E-nose can easily discriminate between yellow bananas with green necks and entirely yellow bananas while allowing the bananas to maintain their biological activities in their normal storage state,thereby showing the possibility of real-time shelf time detection.This portable FBAR-based E-nose has a large testing scale,high sensitivity,good humidity tolerance,and low frequency drift to its surroundings,thereby meeting the needs of cold-chain usage.

Film bulk acoustic resonator(FBAR)Portable E-noseReal-time detectionLayer by layer

Chen Wu、Jiuyan Li

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Frontier Science Center for Smart Materials,College of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Yantai Economic and Technological Development Zone,300 Changjiang Road,Yantai,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities

22078051U1801258DUT22LAB610

2023

10.1063/10.0016870

纳米技术与精密工程(英文)
中国微米纳米技术学会,天津大学

纳米技术与精密工程(英文)

CSTPCDCSCD北大核心EI
影响因子：0.476
ISSN：1672-6030
年,卷(期)：2023.6(1)
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