Nanotechnology-Based E-Noses: Fundamentals and Emerging Applications

E-noses, or electronic sensors, are emerging technologies that use nanomaterials to detect chemicals, gases, and explosives. Nanomaterials must be modified to improve their sensing capability and performance, and theoretical understanding and device fabrication are key to future applications.

Format: Paperback / softback
Length: 486 pages
Publication date: 01 January 2023
Publisher: Elsevier Science Publishing Co Inc

Nanotechnology-based E-Noses: Unveiling Advancements in Nanomaterials and Their Application in E-Sensors

E-noses, also known as electronic sensors, are emerging as cutting-edge technologies for rapid detection of chemicals, gases, and explosives. The concept behind these devices is rooted in the remarkable ability of humans and dogs to identify materials through their odors. While nanomaterials hold immense potential for e-nose technologies, their properties must be tailored to enhance their effectiveness as sensors. The sensing capability and performance of these materials are influenced by various factors, including morphology, dopants, microadditives, sensor design, phase, and structure. A comprehensive theoretical understanding of nanomaterials and technologies is essential for improving sensors with enhanced detection limits. This review will explore the most relevant nanomaterials, their synthesis strategies, and the relationship between their properties and device performance. Furthermore, it will delve into the current state-of-the-art progress in nanotechnology device fabrication, highlighting future applications and the challenges that lie ahead.

Nanomaterials play a pivotal role in e-nose technologies due to their unique properties. For instance, metal nanoparticles, such as gold and silver, have excellent electrical conductivity and can be used to enhance the sensitivity and selectivity of sensors. Carbon nanotubes, on the other hand, possess high surface area, which allows for the adsorption of a wide range of odors. Additionally, nanomaterials can be engineered to possess specific properties, such as magnetic or catalytic behavior, which can further enhance their sensing capabilities.

Synthesis strategies for nanomaterials are crucial in determining their properties and performance. Common methods include chemical vapor deposition, sol-gel synthesis, and template-based synthesis. These methods allow for the controlled growth of nanomaterials with precise control over their morphology, size, and structure. Additionally, these methods can be used to incorporate dopants, microadditives, and other functional groups into the nanomaterials, which can further enhance their sensing capabilities.

The relationship between the properties of nanomaterials and their device performance is complex and multifaceted. For instance, the morphology of nanomaterials can affect their surface area, which in turn affects their ability to adsorb and desorb odors. The dopants and microadditives can modify the electronic properties of nanomaterials, which can influence their sensing capabilities. The phase of nanomaterials can also affect their sensing properties, as different phases can have different chemical and physical properties.

In conclusion, nanotechnology-based E-Noses have made significant strides in advancing nanomaterials and their modification for use in e-sensors. The concept behind these devices is rooted in the remarkable ability of humans and dogs to detect materials through their odors, and nanomaterials hold immense potential for improving the sensing capabilities of e-noses. By understanding the properties of nanomaterials and their synthesis strategies, researchers can engineer sensors with enhanced detection limits and broader applications. The current state-of-the-art progress in nanotechnology device fabrication, along with directions for future applications and challenges, provides a roadmap for the continued development of e-nose technologies.

Weight: 1000g
Dimension: 229 x 152 (mm)
ISBN-13: 9780323911573