Multifunctional graphene sensor for detection of environment signals using a decoupling technique

Lee, Junyeong; Lee, Chang-Ju; Kang, Jaewoon; Park, Honghwi; Kim, Jaeeuk; Choi, Muhan

doi:10.1016/j.sse.2018.10.014

Cited by 8 publications

(6 citation statements)

References 36 publications

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“…Researchers have developed various graphene-based sensors exploiting the properties of pure and composite-based graphene [4,13,14,15,16,17,18,19,20,21,22]. Although a significant amount of work has been done on graphene sensors till now, there are still some issues that need to be addressed.…”

Section: Introductionmentioning

confidence: 99%

“…The second issue currently faced by the microelectronics industry is the lack of multifunctional sensors for monitoring purposes. Even though some researchers have recently worked on the development of graphene-based multifunctional sensors [18,19,20,21,22], there are certain limitations associated with them demanding for new sensing prototypes. For example, the performance of graphene-based Field Effect Transistors (FET) for sensing purposes shows drastic degradation in response at higher frequencies and poor linearity [22].…”

Section: Introductionmentioning

confidence: 99%

“…Even though some researchers have recently worked on the development of graphene-based multifunctional sensors [18,19,20,21,22], there are certain limitations associated with them demanding for new sensing prototypes. For example, the performance of graphene-based Field Effect Transistors (FET) for sensing purposes shows drastic degradation in response at higher frequencies and poor linearity [22]. In some cases, the use of reduced graphene oxide (rGo) as the conductive material to develop the sensor degrades their performance due to the presence of impurity [20].…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional Flexible Sensor Based on Laser-Induced Graphene

Han

Nag

Simorangkir

et al. 2019

Sensors

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The paper presents the design and fabrication of a low-cost and easy-to-fabricate laser-induced graphene sensor together with its implementation for multi-sensing applications. Laser-irradiation of commercial polymer film was applied for photo-thermal generation of graphene. The graphene patterned in an interdigitated shape was transferred onto Kapton sticky tape to form the electrodes of a capacitive sensor. The functionality of the sensor was validated by employing them in electrochemical and strain-sensing scenarios. Impedance spectroscopy was applied to investigate the response of the sensor. For the electrochemical sensing, different concentrations of sodium sulfate were prepared, and the fabricated sensor was used to detect the concentration differences. For the strain sensing, the sensor was deployed for monitoring of human joint movements and tactile sensing. The promising sensing results validating the applicability of the fabricated sensor for multiple sensing purposes are presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multifunctional Flexible Sensor Based on Laser-Induced Graphene

Han

Nag

Simorangkir

et al. 2019

Sensors

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“…Graphene's electrical properties are sensitive to temperature, light, and humidity along with other environmental signals such as gas phase molecules. They may be used for multifunctional sensors if a technique to decouple various types of environment signals is used [14].…”

Section: Introductionmentioning

confidence: 99%

Modeling Enhanced Adsorption of Explosive Molecules on a Hydroxylated Graphene Pore

Holt¹,

Rybolt²

2019

Graphene

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The possibility of a graphene bilayer nanosensor for the detection of explosive molecules was modeled using computational chemistry. A pore was designed on a graphene bilayer structure with three strategically placed perimeter hydroxyl (OH) groups built around the edge of an indented, two-dimensional hexagonal pore. This hydroxylated pore and models of various explosive molecules were optimized using MM2 molecular mechanics parameters. Values were calculated for the molecule-surface interaction energy (binding energy), E, for 22 explosive molecules on a flat graphene bilayer and on the specially designed hydroxylated pore within the bilayer. The molecule-surface binding energy for trinitrotoluene (TNT) increased from 17.9 kcal/mol on the flat graphene bilayer to 42.3 kcal/mol on the hydroxylated pore. Due to the common functionality of nitro groups that exist on many explosive molecules, the other explosive molecules studied gave similar enhancements based on the specific hydrogen bonding interactions formed within the pore. Each of the 22 explosive adsorbate molecules showed increased molecule-surface interaction on the bilayer hydroxylated pore as compared to the flat bilayer. For the 22 molecules, the average E for the flat graphite surface was 15.8 kcal/mol and for the hydroxylated pore E was 33.8 kcal/mol. An enhancement of adsorption should make a detection device more sensitive. Nanosensors based on a modified graphene surface may be useful for detecting extremely low concentrations of explosive molecules or explosive signature molecules.

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“…To understand accurately and comprehensively the object or its environment for further control, multiple parameters need to be measured concurrently on occasions. For example, in the areas of environmental monitoring, , personalized health-monitoring, , smart home automation, and road activities, − an “all-in-one” self-powered multifunctional sensor is needed that mitigates increase in size, complexity and cost. Therefore, exploring and developing actively new types of triboelectric sensors with diverse functions and good stability is warranted.…”

mentioning

confidence: 99%

Magnetic Flap-Type Difunctional Sensor for Detecting Pneumatic Flow and Liquid Level Based on Triboelectric Nanogenerator

Wang

et al. 2020

ACS Nano

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In recent years, the triboelectric nanogenerator (TENG) has attracted increasing attention because it not only converts various mechanical energy into electrical energy but also produces electrical signals as responses. On the basis of the TENG, a magnetic flap type difunctional sensor (MFTDS) has been developed to detect pneumatic flow and liquid level. Consisting of an outer magnetic flap, an inner magnetic float, and a conical cavity, its working mechanism and output characteristics were studied. The MFTDS detects pneumatic flows from 10 to 200 L/min with a flow resolution of 2 L/min. Compared with a commercial flow switch, the MFTDS results are in good agreement. Moreover, the MFTDS detects changes in liquid levels. The effects of liquid level height and flow rate on the performance of the MFTDS were measured and compared with a commercial liquid-level sensor. The results indicate that the output voltage of the MFTDS varies linearly with height but is independent of flow rate. The heights of liquid level from 30 to 130 mm were effectively detected. This work promotes the prospect for multifunctional triboelectric sensors.

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Multifunctional graphene sensor for detection of environment signals using a decoupling technique

Cited by 8 publications

References 36 publications

Multifunctional Flexible Sensor Based on Laser-Induced Graphene

Multifunctional Flexible Sensor Based on Laser-Induced Graphene

Modeling Enhanced Adsorption of Explosive Molecules on a Hydroxylated Graphene Pore

Magnetic Flap-Type Difunctional Sensor for Detecting Pneumatic Flow and Liquid Level Based on Triboelectric Nanogenerator

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