Boosting of NO2 gas sensing performances using GO-PEDOT:PSS nanocomposite chemical interface coated on langasite-based surface acoustic wave sensor

Pasupuleti, Kedhareswara Sairam; Reddeppa, Maddaka; Nam, Dong-Jin; Bak, Na-hyun; Peta, Koteswara Rao; Cho, Hak Dong; Kim, Song-Gang

doi:10.1016/j.snb.2021.130267

Cited by 49 publications

(26 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The choice of techniques and equipment used for the characterization of the SAW-based sensors largely depends on the type of features to be analyzed. The Vector Network Analyser (VNA) is one of the most commonly used measuring equipment [13,31,37,62,86,87,90,[92][93][94] due to its advantages: extremely wide bandwidth, excellent frequency stability, outstanding accuracy of amplitude and phase measurements. The VNA measures complex parameters of single port devices, i.e., the reflection coefficients, or full scattering matrix [S] of two-port transmission type circuits.…”

Section: Saw Sensor Test Methods For Gas Detectionmentioning

confidence: 99%

“…If the transfer characteristic does not show a clear maximum, but has an almost flat shape around RCF or it has (multiple) fluctuations, the RCF reading becomes uncertain. Therefore, the actual RCF position can be approximated using certain symmetric analytic functions; as an example, Pasupuleti et al [31] used Gaussian curve fitting to find out the best estimation of the RCF value. Under these conditions, an alternative solution is to observe the phase variation of the transfer coefficient, since it is a measurable quantity even in situations where the |S 21 | modulus is almost constant in the frequency band of interest.…”

Section: Saw Sensor Test Methods For Gas Detectionmentioning

confidence: 99%

“…From the 2D nanomaterials, graphene (GR) and its derivatives are the most studied carbonbased nanomaterials. GR benefits from several physicochemical properties, but the most important for gas sensing are the following: high stability, large specific area, ease of synthesis and functionalization, low-cost precursors and synthesis routes, and the ability to form porous nanohybrids [31].…”

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

“…As a gas detection mechanism, CP encounters an alteration in their electrical conductivity when they are exposed to NO 2 . The most widely used CP in the development of NO 2 sensors are polyaniline (PANI) [11], poly(3,4-ethylenedioxythiophene) (PEDOT) [31], and polypyrrole (PPy) [37].…”

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

“…In 2021, a commercially available graphene oxide (GO) was doped with a mixed conducting polymer, PEDOT-PSS to form a hybrid nanocomposite [31] that increased the sensitivity and selectivity toward the sensing of NO 2 . This was due to a large number of functional groups present in the polymer mixture.…”

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

See 4 more Smart Citations

Recent Progress on Nanomaterials for NO2 Surface Acoustic Wave Sensors

2022

View full text Add to dashboard Cite

NO2 gas surface acoustic wave (SAW)sensors are under continuous development due to their high sensitivity, reliability, low cost and room temperature operation. Their integration ability with different receptor nanomaterials assures a boost in the performance of the sensors. Among the most exploited nano-materials for sensitive detection of NO2 gas molecules are carbon-based nanomaterials, metal oxide semiconductors, quantum dots, and conducting polymers. All these nanomaterials aim to create pores for NO2 gas adsorption or to enlarge the specific surface area with ultra-small nanoparticles that increase the active sites where NO2 gas molecules can diffuse. This review provides a general overview of NO2 gas SAW sensors, with a focus on the different sensors’ configurations and their fabrication technology, on the nanomaterials used as sensitive NO2 layers and on the test methods for gas detection. The synthesis methods of sensing nanomaterials, their functionalization techniques, the mechanism of interaction between NO2 molecules and the sensing nanomaterials are presented and discussed.

show abstract

Section: Saw Sensor Test Methods For Gas Detectionmentioning

confidence: 99%

Section: Saw Sensor Test Methods For Gas Detectionmentioning

confidence: 99%

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

Section: Carbon-based Nanomaterials For No 2 Sensingmentioning

confidence: 99%

See 3 more Smart Citations

Recent Progress on Nanomaterials for NO2 Surface Acoustic Wave Sensors

2022

View full text Add to dashboard Cite

show abstract

Development of Highly Sensitive and Stable Surface Acoustic Wave‐Based Hydrogen Sensor and Its Interface Electronics

Kim

Singh

Lee

2022

Adv Materials Technologies

View full text Add to dashboard Cite

cause significant damage to humans. ≈4%-75% of the hydrogen content in air is combustible, therefore real-time monitoring of hydrogen leakages is essential to prevent potentially catastrophic events in practical applications. As previously reported in the literature, the hydrogen is generated in transformer insulating oil due to local heating, corona, and arcing. [1][2][3] Gas chromatography and photoacoustic spectroscopy are the typically used methods to measure the concentration of hydrogen leaking out through a ultrafine porous filter from the insulating oil near the drain of a transformer, but the sensor systems involved are bulky, too complex, expensive, and a significant amount of time is required to obtain the final results. Various types of hydrogen sensors have been reported in the literature with different operation mechanisms and sensing materials, including resistance type, [4][5] optical fiber, [6][7][8] electrochemical-based type, [9] and methods using surface acoustic wave (SAW) technology. [10][11][12][13] Most available resistive types of hydrogen sensors usually operate at high temperatures which precludes their commercialization. The high operating temperature of resistive based hydrogen sensors can also lead to the explosive hazards and energy consumption. Among various types of gas sensors, in particular, SAW-based hydrogen gas sensors have drawn attention owing to their high sensitivity, room temperature operation, stability, and low minimum detection level. The sensing mechanism of the SAW sensor is based on the adsorption of target gas molecules on the surface of sensing materials which induces changes in the mass (mass loading), conductivity (electric loading), and elasticity (elastic loading) of sensing film deposited in the propagation path. Any changes, such as mass, resistance, and elastic properties of sensing material lead to modification of SAW propagation properties, resulting in a frequency shift of SAW sensors. Previous studies have shown that mass, electric, and elastic loading are the three factors likely to contribute to the frequency shift of SAW-based sensors. [14] Moreover, several factors may concurrently contribute to the frequency shift of SAW-based sensors. Therefore, it is important to study the contribution of each factor to better understand the detection mechanism for the production of high performance SAW A surface acoustic wave (SAW)-based hydrogen sensor and its corresponding interface electronics have been developed to measure the hydrogen concentration in air at room temperature. Two SAW delay lines with center frequencies of 284 and 284.3 MHz are employed for the sensor system to eliminate any environmental disturbances emerging from temperature and humidity variations on a sensor output. A beehive-configured and Cu-doped SnO 2 nanostructure is used as a hydrogen-sensitive material to have a high surface to volume ratio, high sensitivity, and selectivity for the target hydrogen. The smallest frequency difference detectable in our sensor system including oscil...

show abstract

Piezo/Triboelectric Effect Driven Self‐Powered Gas Sensor for Environmental Sensor Networks

Joo

Lee²,

Lee

2022

Energy Tech

View full text Add to dashboard Cite

With the growing concern about the safety of the spaces where people work and live, the development of fast and accurate real‐time safety monitoring systems such as gas sensors to detect harmful gas such as H2S, NH3, and NO x is essential. For effective monitoring, a wireless sensor system that can be used anytime, anywhere is required, but there is still a limit to the power supply to operate it. Self‐powered gas sensors with piezoelectric/triboelectric nanogenerators (PENGs/TENGs) are receiving considerable attention because they can implement portable gas sensors that do not require an additional power source. Herein, the latest developments in piezoelectric/triboelectric effect based self‐powered gas sensors are summarized and discussed. The first part of this review discusses the fundamental aspects and strategies of the self‐powered active gas sensor based on the piezoelectric and triboelectric effects. The second part focuses on the self‐powered gas sensors that operate on energy generated by piezoelectric and TENGs.

show abstract

Boosting of NO2 gas sensing performances using GO-PEDOT:PSS nanocomposite chemical interface coated on langasite-based surface acoustic wave sensor

Cited by 49 publications

References 55 publications

Recent Progress on Nanomaterials for NO2 Surface Acoustic Wave Sensors

Recent Progress on Nanomaterials for NO2 Surface Acoustic Wave Sensors

Development of Highly Sensitive and Stable Surface Acoustic Wave‐Based Hydrogen Sensor and Its Interface Electronics

Piezo/Triboelectric Effect Driven Self‐Powered Gas Sensor for Environmental Sensor Networks

Contact Info

Product

Resources

About