Recent advances on H2 sensor technologies based on MOX and FET devices: A review

Sharma, Bharat; Sharma, Ashutosh; Kim, Jung-Sik

doi:10.1016/j.snb.2018.01.212

Cited by 132 publications

(73 citation statements)

References 127 publications

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“…It is ecofriendly and the energy density is high (143 kJ g −1 ). [ 110 ] The efficient and safe storage of hydrogen gas is important for its practical applications. Graphene has been recognized as a promising adsorbent material for hydrogen energy owing to its ultra‐high surface area.…”

Section: Other Typical Applications Of Cation–π Interactions In Graphmentioning

confidence: 99%

Cation–π Interactions in Graphene‐Containing Systems for Water Treatment and Beyond

2020

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was also recognized. [2] In addition to these forces, one intriguing noncovalent interaction: cation-π interaction, has emerged as an intermolecular force of great significance in chemistry, biology, and materials science. [3] The cation-π interactions basically refers to the interplay between cations and the π electron cloud of an aromatic system. It plays a great role in biological systems for molecular recognition, protein-protein interactions, and the maintenance of macromolecular structures. It also occurs in protein-ligand interactions and protein-DNA complexes. In structural biology, the positively charged amino acids interact with aromatic amino acids, which contribute to the formation of complex protein structures. The amide NHs are in close contact with the aromatic ring of another amino acid in the protein crystal structures. [4] The cation-π interactions are of great importance to protein stability. There is at least one intermolecular cation-π interaction in half of proteins and one third of homodimers, [5] making significant contributions to the tertiary and quaternary protein structures caused by protein folding. In addition, metallic cations, such as Na + , K + , Cu 2+ , Fe 2+ , Ca 2+ , exist in many enzymes. Their interactions with the π systems in protein structures cannot be ignored. In molecular neurobiology, many studies have proved that receptors bind the neurotransmitters through cation-π interactions. [6] The cation-π interaction is electrostatic in nature because the major contributions arise from the electrostatic attractions between cations and the quadrupole moment of the aromatics. [7] As a result, the strength of cation-π interactions can be the strongest among the noncovalent interactions, several times greater than others. It can also be regulated to be weak, depending on the type of cations and the nature of the π system. The adjustability of cation-π interaction offers a potential strategy to modify the neighboring environment where it is involved.Graphene, a 2D carbon network, with carbon atoms jointed together in a hexagonal honeycomb matrix, can be taken as a novel aromatic macromolecule from certain points of view. The unique structure endows it with excellent physicochemical, electronic, optical, thermal, and mechanical properties, leading to its potential applications in broad fields. [8] The interplay between cations and the delocalized polarizable π electrons of graphene, would alter the intrinsic characteristics of graphene-based structures and impart influences on the performance of graphene-based devices.Cation-π interactions are common in nature, especially in organisms. Their profound influences in chemistry, physics, and biology have been continuously investigated since they were discovered in 1981. However, the importance of cation-π interactions in materials science, regarding carbonaceous nanomaterials, has just been realized. The interplay between cations and delocalized polarizable π electrons of graphene would bring about significant changes to the intrinsic...

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Section: Other Typical Applications Of Cation–π Interactions In Graphmentioning

confidence: 99%

Cation–π Interactions in Graphene‐Containing Systems for Water Treatment and Beyond

2020

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“…In some cases, limits of detection in ppb range and response/recovery times of few seconds, were possible to achieve thus enabling real-time monitoring,. Detailed reviews on this can be found for instance in [612,614,622].…”

Section: Advantages and Challenges Of Sensing With (Oxide Nanostructumentioning

confidence: 99%

Metal oxide nanostructures for sensor applications

Nunes

Pimentel

Gonçalves

et al. 2019

Semicond. Sci. Technol.

260

119

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Human health, environmental protection and safety are just a few examples of current humankind main concerns, that drive the scientific community to develop sensors able to precisely monitor and alert to possible harms in real time. Over the years, semiconductor metal oxide-based materials have been largely employed as sensors dedicated to several applications, being particularly interesting at the nanometer scale, since it is largely known that smaller crystallite size enhances sensor's performance. Moreover, these materials are highly appealing as they can be produced by low-cost wet-chemical synthesis routes and are in general nontoxic, earth abundant and low-cost. This manuscript extensively reviews the recent developments of nanostructured semiconductor metal oxide sensors ranging from gas to humidity sensors, including ultraviolet (UV) sensors and biosensors. Zinc oxide (ZnO), titanium dioxide (TiO2), tungsten trioxide (WO3), copper oxide (CuO and Cu2O), tin oxide (SnO and SnO2), and vanadium oxide (VO2, V2O5)-based sensors either as nanoparticles or as continuous films/layers are described. Their sensing properties are correlated to size, shape, presence of defects, doping elements, amongst other relevant parameters. Different techniques and methods of fabricating these materials are addressed. The review is concluded with novel approaches for functionalization and future perspectives for sensor developments.

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“…In today's industrial environments, pellistors are used instead of MOS sensors due to their better accuracy [73]. With the advent of hydrogen as an alternative fuel, also here the detection of leaks to prevent explosions becomes more and more important and is often done by MOS or GasFET sensors [74], [75]. MOS sensors are also replacing or complementing the optical detection in smoke detectors, enabling earlier detection of fires with fewer false alarms by measuring the ratio between hydrogen and carbon monoxide [45]- [47], [76].…”

Section: 1 Safety and Securitymentioning

confidence: 99%

Improving the Performance of Gas Sensor Systems with Advanced Data Evaluation, Operation, and Calibration Methods

Bastuck

2019

Linköping Studies in Science and Technology. Dissertations

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In order to facilitate the widespread use of gas sensors, some challenges must still be overcome. Many of those are related to the reliable quantification of ultra-low concentrations of specific compounds in a background of other gases. This thesis focuses on three important items in the measurement chain: sensor material and operating modes, evaluation of the resulting data, and test gas generation for efficient sensor calibration. New operating modes and materials for gas-sensitive field-effect transistors have been investigated. Tungsten trioxide as gate oxide can improve the selectivity to hazardous volatile organic compounds like naphthalene even in a strong and variable ethanol background. The influence of gate bias and ultraviolet light has been studied with respect to the transport of oxygen anions on the sensor surface and was used to improve classification and quantification of different gases. DAV 3 E, an internationally recognized MATLAB-based toolbox for the evaluation of cyclic sensor data, has been developed and published as opensource. It provides a user-friendly graphical interface and specially tailored algorithms from multivariate statistics. The laboratory tests conducted during this project have been extended with an interlaboratory study and a field test, both yielding valuable insights for future, more complex sensor calibration. A novel, efficient calibration approach has been proposed and evaluated with ten different gas sensor systems. i styrning och data-utvärdering som tagits fram har både en jämförande undersökning av modellernas/metodernas prestanda av två oberoende laboratorier och fält-mätningar i en av de tilltänkta tillämpningarna genomförts. Bl.a. baserat på resultaten och insikterna från dessa övningar har ett helt nytt angreppssätt avseende robust och effektiv kalibrering och kvalitets-utvärdering av sensor-system utvecklats och utvärderats för tio olika sensor-system. v Preface This dissertation is the result of my binational doctorate supervised by Prof.

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Recent advances on H2 sensor technologies based on MOX and FET devices: A review

Cited by 132 publications

References 127 publications

Cation–π Interactions in Graphene‐Containing Systems for Water Treatment and Beyond

Cation–π Interactions in Graphene‐Containing Systems for Water Treatment and Beyond

Metal oxide nanostructures for sensor applications

Improving the Performance of Gas Sensor Systems with Advanced Data Evaluation, Operation, and Calibration Methods

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