Carbon nanotubes (CNTs) promise to advance a number of real-world technologies. Of these applications, they are particularly attractive for uses in chemical sensors for environmental and health monitoring. However, chemical sensors based on CNTs are often lacking in selectivity, and the elucidation of their sensing mechanisms remains challenging. This review is a comprehensive description of the parameters that give rise to the sensing capabilities of CNT-based sensors and the application of CNT-based devices in chemical sensing. This review begins with the discussion of the sensing mechanisms in CNT-based devices, the chemical methods of CNT functionalization, architectures of sensors, performance parameters, and theoretical models used to describe CNT sensors. It then discusses the expansive applications of CNT-based sensors to multiple areas including environmental monitoring, food and agriculture applications, biological sensors, and national security. The discussion of each analyte focuses on the strategies used to impart selectivity and the molecular interactions between the selector and the analyte. Finally, the review concludes with a brief outlook over future developments in the field of chemical sensors and their prospects for commercialization.

Carbon Nanotube Chemical Sensors

Food safety is a prevalent concern around the world. As such, detection, removal, and control of risks and hazardous substances present from harvest to consumption will always be necessary. Metal-organic frameworks (MOFs), a class of functional materials, possess unique physical and chemical properties, demonstrating promise in food safety applications. In this review, the synthesis and porosity of MOFs are first introduced by some representative examples that pertain to the field of food safety. Following that, the application of MOFs and MOF-based materials in food safety monitoring, food processing, covering preservation, sanitation, and packaging is overviewed. Future perspectives, as well as potential opportunities and challenges faced by MOFs in this field will also be discussed. This review aims to promote the development and progress of MOF chemistry and application research in the field of food safety, potentially leading to novel solutions.

Metal-Organic Frameworks for Food Safety.

Application of MOF materials as drug delivery systems for cancer therapy and dermal treatment

Solid-phase microextraction (SPME), a solvent-free extraction technique, is an effective, cost-saving, versatile, and easily automated assay for high sample throughput. This paper reviews the application of solid-phase microextraction (SPME) for the analysis of flavors/off-flavors in wine, fruits, meats, cereal products and non-volatile compounds such as pesticides, pharmaceuticals and personal care products, endogenous substances and other contaminants in food samples. The future developments and potential applications of SPME methods in food analysis was looked ahead.

Applications of solid-phase microextraction in food analysis

https://profdoc.um.ac.ir/articles/a/1084243.pdf

Metal−organic framework-based sorbents in analytical sample preparation

Ethylene, an important plant hormone, is of utmost importance during many developmental processes of plants. However, the efficient enrichment and analysis of trace ethylene still remains a challenge. A simple and mild multilayer interparticle linking strategy was proposed to fabricate a novel hybrid MOF-199 enrichment coating. Strong chemical interparticle linkages throughout the coating improved the durability and reproducibility of hybrid MOF-199 coating dramatically. This coating performed a significant extraction superiority of ethylene over commonly used commercial coatings, attributed to the multiple interactions including “molecular sieving effect”, hydrogen bonding, open metal site interaction, and π–π affinity. The hybridization of multiwalled carbon nanotubes (MWCNTs) with MOF-199 further improved the enrichment capability and also acted as a hydrophobic “shield” to prevent the open metal sites of MOF-199 from being occupied by water molecules, which effectively improved the moisture-resistant ...

Multilayer Interparticle Linking Hybrid MOF-199 for Noninvasive Enrichment and Analysis of Plant Hormone Ethylene

[Development of sample pretreatment techniques-rapid detection coupling methods for food security analysis].

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Multilayer Interparticle Linking Hybrid MOF-199 for Noninvasive Enrichment and Analysis of Plant Hormone Ethylene

[Development of sample pretreatment techniques-rapid detection coupling methods for food security analysis].