Gas molecule sensing of van der Waals tunnel field effect transistors

Polymeric piezoelectric composites for energy harvesting applications are considered a significant research field which provides the convenience of mechanical flexibility, suitable voltage with sufficient power output, lower manufacturing cost, and rapid processing compared to ceramic‐based composites. This review focuses majorly on the basic theory and principles behind piezoelectric energy harvesting (PEH) devices, followed by specified materials used for the different devices. Different structural configurations associated with fabrication of PEH devices are discussed in detail along with their major advantages and drawbacks. Numerous classes of piezoelectric polymers such as polyvinylidene fluoride, polylactic acid, cellulose, polyamides, polyurea, polyurethanes, and their composites used for energy harvesting applications as a productive alternative of lead‐based piezo‐ceramics, are extensively addressed and explored. Additionally, current global and Indian scenarios associated with PEH devices, major challenges associated with them, and the future perspective of such devices are also reported in this review.

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“…In 2017, K. Choi et al . explored the enhanced piezoelectric behavior of PVDF/ZnO nanowires based nanocomposite.…”

Section: Piezoelectric Polymers: a Productive Alternative To Piezo‐cementioning

confidence: 99%

Advances in Piezoelectric Polymer Composites for Energy Harvesting Applications: A Systematic Review

Mishra

Unnikrishnan

Nayak

et al. 2018

Macro Materials & Eng

373

293

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“…The use of 1-D nanostructures, such as nanotubes, nanowires (NWs), nanofibers, and nanorods, in combination with 2-D materials has been demonstrated to be effective in numerous IAQ-sensing applications, owing especially to their fast electron-transport capability, special morphology, and high surface-to-volume ratio [167]. Meanwhile, due to the formation of Van der Waals heterostructures through direct stacking of different 2-D materials, various types of 2-D-2-D heterostructures, including black phosphorus/MoSe 2 , graphene/MoS 2 , and graphene/WS 2 /graphene, have been applied in novel devices for IAQ monitoring [168,169]. Finally, by growing or transferring 2-D materials onto bulk 3-D semiconductors, layered 2-D-nanostructured semiconductors can be integrated with traditional bulk 3-D semiconductor substrates in the design of new gas-sensing devices [167].…”

Section: Development Of Materials For Iaq Sensorsmentioning

confidence: 99%

Indoor Air Pollution, Related Human Diseases, and Recent Trends in the Control and Improvement of Indoor Air Quality

Tran

Park

Lee

2020

IJERPH

475

164

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Indoor air pollution (IAP) is a serious threat to human health, causing millions of deaths each year. A plethora of pollutants can result in IAP; therefore, it is very important to identify their main sources and concentrations and to devise strategies for the control and enhancement of indoor air quality (IAQ). Herein, we provide a critical review and evaluation of the major sources of major pollutant emissions, their health effects, and issues related to IAP-based illnesses, including sick building syndrome (SBS) and building-related illness (BRI). In addition, the strategies and approaches for control and reduction of pollutant concentrations are pointed out, and the recent trends in efforts to resolve and improve IAQ, with their respective advantages and potentials, are summarized. It is predicted that the development of novel materials for sensors, IAQ-monitoring systems, and smart homes is a promising strategy for control and enhancement of IAQ in the future.

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“…Such unique capability of 2D hybrid heterostructures may provide an unexplored strategy to realize a chemical sensor with extremely low power consumption as well as high sensitivity. Nevertheless, the chemical sensing based on 2D material heterostructures has rarely been demonstrated yet …”

mentioning

confidence: 99%

“…Note that palladium (Pd) nanoparticles were decorated on the Gr surface as a catalyst for sensitive and recoverable H 2 sensing at room temperature (Figure S8, Supporting Information), and the detailed sensing characteristics depending on the light intensity and gas concentration will be further discussed. Especially, we mainly focus on the photovoltaic‐driven sensing performances of the fabricated devices at a zero bias voltage although electrical sensing responses can be also achieved at the application of finite bias voltages in the dark …”

mentioning

confidence: 99%

Self‐Powered Chemical Sensing Driven by Graphene‐Based Photovoltaic Heterojunctions with Chemically Tunable Built‐In Potentials

Lee

Park

Han

et al. 2018

Small

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applications, the development of a sensor with exceptional energy efficiency is a requisite. [1,7,8] However, conventional electrical sensors based on resistors or diodes inevitably require the external application of a constant voltage (or current) to output an electrical signal, and thus consume electric power (current times voltage) for the operation. [3,9] In addition, many gas sensors based on metal oxide semiconductors and inorganic nanomaterials require additional thermal energy in the range of 200-500 °C to activate and optimize surface absorption and desorption of gas molecules on the sensing surface. [10][11][12] Power consumption and heating will become increasingly problematic as the number of connected devices increases in highly networked system. Therefore, these external voltage sources and heating elements, required for device operation, are ultimately undesirable with respect to low power consumption, long-term stability, and miniaturization. To address these issues, the development of a new class of sensor platforms capable of consuming minimal steady-state power is necessary.Atomically thin 2D materials, including semimetallic graphene (Gr) and semiconducting transition metal dichalcogenides, have great potential in chemical sensors with excellent sensitivity due to their large surface-to-volume ratio and superior electrical properties. [13][14][15] In addition, combined with the recent advent of artificial van der Waals heterostructures constructed by staking various 2D materials in a designed manner, the ability to tune the electrochemical potential of each constituent layer and the built-in potential of the heterostructures by electrical and/or chemical means enables us to design hybrid heterostructures based on 2D materials with unconventional functions for various device applications. [16][17][18][19][20][21][22] Such unique capability of 2D hybrid heterostructures may provide an unexplored strategy to realize a chemical sensor with extremely low power consumption as well as high sensitivity. Nevertheless, the chemical sensing based on 2D material heterostructures has rarely been demonstrated yet. [23,24] In this work, we propose a device concept for self-powered chemical sensing driven by chemical-responsive photovoltaic action in the Gr-based heterojunction devices. We also prove a Ultralow power chemical sensing is essential toward realizing the Internet of Things. However, electrically driven sensors must consume power to generate an electrical readout. Here, a different class of self-powered chemical sensing platform based on unconventional photovoltaic heterojunctions consisting of a top graphene (Gr) layer in contact with underlying photoactive semiconductors including bulk silicon and layered transition metal dichalcogenides is proposed. Owing to the chemically tunable electrochemical potential of Gr, the built-in potential at the junction is effectively modulated by absorbed gas molecules in a predictable manner depending on their redox characteristics. Such ability distinctive fr...

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Gas molecule sensing of van der Waals tunnel field effect transistors

Cited by 34 publications

References 41 publications

Advances in Piezoelectric Polymer Composites for Energy Harvesting Applications: A Systematic Review

Advances in Piezoelectric Polymer Composites for Energy Harvesting Applications: A Systematic Review

Indoor Air Pollution, Related Human Diseases, and Recent Trends in the Control and Improvement of Indoor Air Quality

Self‐Powered Chemical Sensing Driven by Graphene‐Based Photovoltaic Heterojunctions with Chemically Tunable Built‐In Potentials

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