Abstract
The focus of this review is an introduction to chemiresistive chemical sensors. The general concept of chemical sensors is briefly introduced, followed by different architectures of chemiresistive sensors and relevant materials. For several of the most common systems, the fabrication of the active materials used in such sensors and their properties are discussed. Furthermore, the sensing mechanism, advantages, and limitations of each group of chemiresistive sensors are briefly elaborated. Compared to electrochemical sensors, chemiresistive sensors have the key advantage of a simpler geometry, eliminating the need for a reference electrode. The performance of bulk chemiresistors can be improved upon by using freestanding ultra-thin films (nanomaterials) or field effect geometries. Both of those concepts have also been combined in a gateless geometry, where charge transport though a percolation network of nanomaterials is modulated via adsorbate doping.
Funding statement: The National Science and Engineering Research Council of Canada provided financial support through the Discovery Grant program.
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Articles in the same Issue
- Chemical sensors based on surface charge transfer
- Computational approach to the study of morphological properties of polymer/fullerene blends in photovoltaics
- Grignard Reagents and Palladium
- A 5.2/5.8 GHz Dual Band On-Off Keying Transmitter Design for Bio-Signal Transmission
- Impacts of ESD Reliability by Different Layout Engineering in the 0.25-μm 60-V High-Voltage LDMOS Devices
- Erratum to: Theoretical Study of the Electronic States of Newly Detected Dications. Case of MgS2+ AND SiN2+
- Erratum to: Optical and Magnetic Properties of Free-standing Silicene, Germanene and T-graphene System
- Erratum to: Analytical Solution of Pantograph Equation with Incommensurate Delay
- Erratum to: Addressing the challenges of standalone multi-core simulations in molecular dynamics
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