Chemical and Biochemical Sensors, 1. Fundamentals

Bârsan, Nicolae; Gauglitz, Günter; Oprea, A.; Ostertag, Edwin; Proll, Günther; Rebner, Karsten; Schierbaum, K.D.; Schleifenbaum, Frank

doi:10.1002/14356007.b06_121.pub2

Cited by 22 publications

(5 citation statements)

References 322 publications

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“…As a result of reversible redox reactions between reactive gases and the SMOx surface, a SMOx’s electrical properties change. Finally, the electrical signals were measured and displayed using suitable circuits, such as a microprocessor unit [ 12 , 167 ].…”

Section: Gas-sensing Applicationsmentioning

confidence: 99%

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Dutta,

Noushin,

Tabassum

et al. 2023

Sensors

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Identifying disease biomarkers and detecting hazardous, explosive, flammable, and polluting gases and chemicals with extremely sensitive and selective sensor devices remains a challenging and time-consuming research challenge. Due to their exceptional characteristics, semiconducting metal oxides (SMOxs) have received a lot of attention in terms of the development of various types of sensors in recent years. The key performance indicators of SMOx-based sensors are their sensitivity, selectivity, recovery time, and steady response over time. SMOx-based sensors are discussed in this review based on their different properties. Surface properties of the functional material, such as its (nano)structure, morphology, and crystallinity, greatly influence sensor performance. A few examples of the complicated and poorly understood processes involved in SMOx sensing systems are adsorption and chemisorption, charge transfers, and oxygen migration. The future prospects of SMOx-based gas sensors, chemical sensors, and biological sensors are also discussed.

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Section: Gas-sensing Applicationsmentioning

confidence: 99%

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Dutta,

Noushin,

Tabassum

et al. 2023

Sensors

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“…[3,4,5] The precise attention is paid to polymeric materials combined with biomolecules and nanoparticles of different nature. [1,2,6] Among them, thin films based on silica and sol-gel materials are of big interest, notably because they can be easily combined and (or) functionalized with different kind of organic and inorganic substances.…”

Section: Introductionmentioning

confidence: 99%

Composite Silica‐Based Films as Platforms for Electrochemical Sensors

Tananaiko,

Walcarius

2023

The Chemical Record

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Sol‐gel‐derived silica thin films generated onto electrode surfaces in the form of organic‐inorganic hybrid coatings or other composite layers have found tremendous interest for being used as platforms for the development of electrochemical sensors and biosensors. After a brief description of the strategies applied to prepare such materials, and their interest as electrode modifier, this review will summarize the major advances made so far with composite silica‐based films in electroanalysis. It will primarily focus on electrochemical sensors involving both non‐ordered composite films and vertically oriented mesoporous membranes, the biosensors exploiting the concept of sol‐gel bioencapsulation on electrode, the spectroelectrochemical sensors, and some others.

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“…The first gas sensors based on SnO 2 , for the detection of natural gas leakages, were realized by Taguchi, who later founded Figaro Eng., the first company to commercialize SMOX-based gas sensors in Japan. Since then, SMOX-based sensors have been used in various applications, for example, explosive and toxic gas alarms, controls for air intake into car cabins, monitors for industrial processes, and so forth. , Their technological realization was significantly changed and the combination between thick porous sensing layers and micro-electro-mechanical system substrates, which offers significant miniaturization, cost reduction, and lowering of the power consumption is now the state of the art. , Recent developments are integrating different sensing materials on the same chip together with driving and evaluation electronics, heralding the occurrence of IoT-ready SMOX-based sensing devices.…”

Section: Introductionmentioning

confidence: 99%

“…explosive and toxic gas alarms, controls for air intake into car cabin, monitors for industrial processes etc. [5,6].…”

mentioning

confidence: 99%

Conductance Model for Single-Crystalline/Compact Metal Oxide Gas-Sensing Layers in the Nondegenerate Limit: Example of Epitaxial SnO₂(101)

et al. 2019

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Semiconducting metal oxide (SMOX)-based gas sensors are indispensable for safety and health applications, e.g. explosive, toxic gas alarms, controls for intake into car cabins and monitor for industrial processes. In the past, the sensor community has been studying polycrystalline materials as sensors where the porous and random microstructure of the SMOX does not allow a separation of the phenomena involved in the sensing process. This lead to conduction models that can model and predict the behavior of the overall response, but they were not capable of giving fundamental information regarding the basic mechanisms taking place. The study of epitaxial layers is the definite prove to clarify the different aspects and contributions of the sensing mechanisms that are not possible to do by studying a polycrystalline sample. A detailed analytical model for n and p-type single-crystalline/compact metal oxide gas sensors was developed that directly relates the conductance of the sample with changes in the surface electrostatic potential. Combined DC resistance and work function measurements were used in a compact SnO2 (101) layer in operando conditions that allowed us to check the validity of our model in the region where Boltzmann approximation holds to determine surface and bulk properties of the material.

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Chemical and Biochemical Sensors, 1. Fundamentals

Cited by 22 publications

References 322 publications

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Composite Silica‐Based Films as Platforms for Electrochemical Sensors

Conductance Model for Single-Crystalline/Compact Metal Oxide Gas-Sensing Layers in the Nondegenerate Limit: Example of Epitaxial SnO₂(101)

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Chemical and Biochemical Sensors, 1. Fundamentals

Cited by 22 publications

References 322 publications

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review

Composite Silica‐Based Films as Platforms for Electrochemical Sensors

Conductance Model for Single-Crystalline/Compact Metal Oxide Gas-Sensing Layers in the Nondegenerate Limit: Example of Epitaxial SnO2(101)

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Conductance Model for Single-Crystalline/Compact Metal Oxide Gas-Sensing Layers in the Nondegenerate Limit: Example of Epitaxial SnO₂(101)