Fabrication and characterizations of SAW methane sensor based on cryptophane-E membrane

Shen, Bin; Yang, Peiqing; Liu, Xinlei; Zhang, Hongquan; Cao, Shengwu

doi:10.1007/s12652-018-0982-1

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…25. Methane detection with cryptophane-A/E films was reported by Wang et al and Shen et al, respectively, using Q-SAW transducers at 300 MHz and 204 MHz [482,483]. The sensitivity was sufficient to measure well below the LFL of 5%.…”

Section: Overview Of the Target Analytes Detected By Ggssmentioning

confidence: 84%

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Oprea

2020

Anal Bioanal Chem

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Section: Overview Of the Target Analytes Detected By Ggssmentioning

confidence: 84%

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Oprea

2020

Anal Bioanal Chem

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“…Since the coupling between LP 01 mode and mode D varies with the methane concentration and ambient temperature, the peak-shift of LP 01 mode induced by measured parameters should be investigated at first. Moreover, based on the experimental results from [34], the sensor's response time is about 50 s, and recovery time is 72 s. Considering the lower explosion limit of methane and the linear relationship between the RI of gas-sensitive film and gas concentration, the methane gas concentration between 0% and 3.5% is set as the measurement range. Figure 8(a) indicates the confinement loss spectra of LP 01 mode within the concentration range of 0% to 3.5% on the condition of T = 20 ℃, and there is an obvious blue peak-shift with an increase in C. The case of C = 0 is set as the reference point, and then the methane sensitivities for resonant peaks .48 nm / % k   , respectively.…”

Section: Measurement Results and Discussionmentioning

confidence: 99%

High Sensitive Methane Sensor With Temperature Compensation Based on Selectively Liquid-Infiltrated Photonic Crystal Fibers

et al. 2019

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A highly sensitive and temperature-compensated methane sensor based on a liquid-infiltrated photonic crystal fiber (PCF) is proposed. Two bigger holes near the core area are coated with a methane-sensitive compound film, and specific cladding air holes are infiltrated into the liquid material to form new defective channels. The proposed sensor can achieve accurate measurement of methane concentration through temperature compensation. The sensitivity can reach to 20.07 nm/% with a high linearity as the methane concentration is within the range of 0%-3.5% by volume. The proposed methane sensor can not only improve the measurement accuracy, but also reduce the metrical difficulty and simplify the process.

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“…The research group completed the design of sensor devices [ 46 ], and ST-X cut quartz—with a temperature coefficient of 0 and relatively low cost—was used as the substrate [ 47 ]. The size of the substrate material was 13 mm × 8 mm, and the thickness was 500 μm.…”

Section: Sensor Developmentmentioning

confidence: 99%

Study on SAW Methane Sensor Based on Cryptophane-A Composite Film

et al. 2023

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Surface Acoustic Wave (SAW) methane-sensing technology is a new way to detect methane at room temperature. However, the material and structure of the sensitive film are the important factors affecting the detection performance of the sensor. In this paper—with a SAW methane sensor using graphene–nickel cavitation—a composite film is proposed, which can work at room temperature. A delay linear dual-channel differential oscillator with center frequency of 204.3 MHz and insertion loss of −5.658 dB was designed; Cryptophane-A material was prepared by the “three-step method”. The composite sensitive film was synthesized by a drop coating method, electrochemical deposition method and electroplating method. The composite film was characterized by SEM. The sensor performance test system and gas sensitivity test system were constructed to determine the response performance of the sensor at concentrations of 0~5% CH4. The results showed that the sensor had a good response recovery performance in the test concentration range, and the frequency offset was positively correlated with methane concentration. The 90% average response time and recovery times were 41.2 s and 57 s, respectively. The sensor sensitivity was 809.4 ± 6.93 Hz/(1% CH4). This study provides a good theoretical basis for the development of surface acoustic-wave methane sensors.

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Fabrication and characterizations of SAW methane sensor based on cryptophane-E membrane

Cited by 5 publications

References 9 publications

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

High Sensitive Methane Sensor With Temperature Compensation Based on Selectively Liquid-Infiltrated Photonic Crystal Fibers

Study on SAW Methane Sensor Based on Cryptophane-A Composite Film

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