Graphene-coated quartz crystal microbalance for detection of volatile organic compounds at room temperature

Quang, Vũ Văn; Hùng, Vũ Ngọc; Tuấn, Lê Anh; Phan, Vu Ngoc; Huy, Tran Quang; Quy, Nguyen Van

doi:10.1016/j.tsf.2014.07.036

Cited by 71 publications

(34 citation statements)

References 29 publications

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“…Since as-prepared rGO thin film has aggregates, wrinkles and crumples along with multilayer graphene structure. Therefore, when the acetone vapor is exposed to the rGOcoated QCM, the acetone molecules cause van der walls interaction and hydrogen bonding between acetone molecule and rGO (COOH group of graphene), leading to the change in mass of absorbate at surface of the QCM electrode [10]. Consequently, the variations in frequency shift are obtained.…”

Section: Related Mechanismmentioning

confidence: 99%

“…In the sensor's architecture, sensing material plays a very crucial role in responding to the gas molecules. As a sensing material, several pristine and composite materials such as zinc oxide (ZnO) [5], tin oxide (SnO2) [6], titanium dioxide (TiO2) [7], polyaniline (PANI) [8], carbon nanotubes (CNTs) [9], graphene [10] and ZnO-CuO [11] have been widely investigated. Among these sensing materials, graphene has attracted the research community due to its unique properties at room temperature for instance, large surface area (2630 m 2 g −1 ) for molecular adsorption, outstanding thermal (~5000 W.m -1 .k -1 ) and electrical conductivity (up to 6000 S.cm -1 ) and high carrier mobility of 1.5 × 10 5 cm 2 /Vs [12].…”

Section: Introductionmentioning

confidence: 99%

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Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Gupta

Athirah

Hawari

2020

IJEECS

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<span>Volatile organic compounds (VOCs) affect our daily life through their emission from very common sources such as plants, building materials, paints, pesticides, and fossil fuel burning. The detection of VOCs at room temperature is a prime requirement. The graphene-based gas sensor has the potential to detect these VOC gases due to its attractive features such as high mobility and large surface area. In this work, a graphene-derivative is prepared as a sensing material in order to detect acetone. The thin film of graphene-derivative is prepared by a drop-cast method on a quartz crystal microbalance (QCM) sensor followed by drying in the room environment conditions. The prepared graphene-derivative and thin films are characterized structurally and morphologically by standard microscopic techniques such as FESEM, EDX, and Raman spectroscopy. The electrical parameters such as mobility and resistivity are measured using Hall-effect measurements at room temperature. The response and recovery time of the graphene-derivative based 10 MHz QCM sensor are found to be 23 s and 20 s, respectively. This highly sensitive graphene-based gas sensor with good reversibility can be employed for human health and environment safety applications. </span>

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Section: Related Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Gupta

Athirah

Hawari

2020

IJEECS

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“…Gas sensors based on graphene in combination with a piezoelectric microbalance, are however, scarcely reported. Quartz crystal microbalance (QCM), a form of piezoelectric microbalance has been employed as a gas sensor in some work, but the sensing performance of such devices has the potential to be further improved [18,19]. The improvements may include employing the relatively new LCM, instead of QCM, that promises better sensitivity due to higher electromechanical coupling coefficient and piezoelectric stability from ambient to high temperatures, up to 1200 • C [20].…”

Section: Introductionmentioning

confidence: 99%

A Langasite Crystal Microbalance Coated with Graphene Oxide-Platinum Nanocomposite as a Volatile Organic Compound Sensor: Detection and Discrimination Characteristics

Leong

Saha

Swamy

et al. 2020

Sensors

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We propose a novel langasite crystal microbalance (LCM) sensor with a graphene-based sensing medium to detect and discriminate volatile organic compounds (VOCs) at room temperature. A thin film of graphene oxide embedded with Pt nanostructures (GO-Pt nanocomposite) was deposited on the electrode surface of the LCM, a thickness-shear acoustic wave resonator. Ethyl acetate, acetic acid, and ethanol were chosen as typical VOCs for this study. Sensitivity and selectivity of coated LCM were investigated for different concentrations of the VOCs by analysing the resonant properties of the sensor. When exposed to VOCs, a negative shift in series resonance frequency was observed due to the mass loading of VOC molecules. Simultaneously, changes in equivalent resistance and parallel resonance frequency of the sensor were also observed due to the interaction of VOCs with charge carriers on the GO-Pt nanocomposite film surface. This dual measurement of both series and parallel resonance frequencies allowed for detection and discrimination of VOCs. Moreover, the high thermal stability of langasite makes the proposed sensor suitable even for harsh environmental conditions.

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“…Butanol, isopropanol, acetone, ethanol, and formaldehyde were sensed by graphene coated on the transducer by chemical vapor deposition. (21,22) In this study, the VOC sensing properties of a chemically derived graphene (CDG) sensor based on an interdigital transducer (IDT)-a chemiresistive sensor-were investigated at room temperature under dry air conditions. The nine test analytes were selected according to their chemical nature representing various chemical classes such as alcohols, esters, hydrocarbons, chlorocarbons, and amines.…”

Section: Introductionmentioning

confidence: 99%

Room-temperature Sensing of Volatile Organic Compounds Using Graphene

Şen¹,

Öztürk²,

Harbeck³

et al. 2019

Sensors and Materials

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Graphene-based sensors are mostly studied in terms of their responses to inorganic gases such as various nitrogen oxides or ozone. In this work, chemically derived graphene (CDG) is assessed in terms of its gas sensing properties at room temperature for a selected set of volatile organic compounds (VOCs) representing different chemical classes. CDG was coated on gold interdigital electrodes on a glass substrate by drop casting. Structural and morphological analyses were realized by surface electron microscopy and energy-dispersive X-ray spectroscopy techniques. Among the nine test analytes, the highest sensor sensitivities were observed for chlorobenzene, tetrachloroethylene, and triethylamine. The results show that CDG sensors are not only sensitive to rather reactive inorganic gases, but can also be used in the detection of a wide range of VOCs.

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Graphene-coated quartz crystal microbalance for detection of volatile organic compounds at room temperature

Cited by 71 publications

References 29 publications

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

Graphene derivative coated QCM-based gas sensor for volatile organic compound (VOC) detection at room temperature

A Langasite Crystal Microbalance Coated with Graphene Oxide-Platinum Nanocomposite as a Volatile Organic Compound Sensor: Detection and Discrimination Characteristics

Room-temperature Sensing of Volatile Organic Compounds Using Graphene

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