Miniature Nitro and Peroxide Vapor Sensors Using Nanoporous Thin Films

Blue, Robert; Thomson, Neil; Taylor, Stewart J.; Fletcher, Alan J.; Skabara, Peter J.; Uttamchandani, Deepak

doi:10.1109/jsen.2016.2559442

Cited by 4 publications

(5 citation statements)

References 23 publications

(21 reference statements)

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“…Detection limits of 200 ppb were achieved for nitrobenzene and 2-nitrotoluene and for peroxide vapours, ppm levels were achieved. 130…”

Section: Organic Semiconductorsmentioning

confidence: 99%

“…Detection limits of 200 ppb were achieved for nitrobenzene and 2-nitrotoluene, and for peroxide vapors, ppm levels were achieved. 130 Graphene and Carbon Nanotubes. Carbon-based semiconductors such as graphene and carbon nanotubes (CNTs) have been extensively researched as sensing materials due to their favorable electrical, mechanical, and chemical properties over inorganic equivalents.…”

Section: Animal Olfactory Systemsmentioning

confidence: 99%

“…The resultant copolymers were electrochemically deposited onto interdigitated electrodes (IDEs), with sensing achieved through measuring the change in capacitance on adsorption of target vapors. Detection limits of 200 ppb were achieved for nitrobenzene and 2-nitrotoluene, and for peroxide vapors, ppm levels were achieved …”

Section: Sensorsmentioning

confidence: 99%

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Recent Developments in the Field of Explosive Trace Detection

2020

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Explosive trace detection (ETD) technologies play a vital role in maintaining national security. ETD remains an active research area with many analytical techniques in operational use. This review details the latest advances in animal olfactory, ion mobility spectrometry (IMS), Raman and colorimetric detection methods. Developments in optical, biological, electrochemical, mass and thermal sensors are also covered in addition to the use of nanomaterials technology. Commercially available systems are presented as examples of current detection capabilities and as benchmarks for improvement. Attention is also drawn to recent collaborative projects involving government, academia and industry, to highlight the emergence of multimodal screening approaches and applications. The objective of the review is to provide a comprehensive overview of ETD by; highlighting challenges in ETD and providing an understanding of the principles, advantages and limitations of each technology and relating this to current systems.

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“…Detection limits of 200 ppb were achieved for nitrobenzene and 2-nitrotoluene and for peroxide vapours, ppm levels were achieved. 130…”

Section: Organic Semiconductorsmentioning

confidence: 99%

Section: Animal Olfactory Systemsmentioning

confidence: 99%

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Recent Developments in the Field of Explosive Trace Detection

2020

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“…Therefore, the nanostructured electrodes have recently been extensively studied for electrochemical sensors. [156][157][158][159][160][161][162] Table II demonstrates the sensing application of numerous nanostructured electrodes fabricated by the EM 2 method with and without surface decoration. In this section, the likely correlation between the performance of some nanostructured electrodes and their architectures is discussed.…”

Section: Application In Electrochemical Analysis and Sensorsmentioning

confidence: 99%

Review—Electrolytic Metal Atoms Enabled Manufacturing of Nanostructured Sensor Electrodes

Jiang

Wang

2019

J. Electrochem. Soc.

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Sensing materials play a key role in the successful implementation of electrochemical sensors, and nanotechnology has emerged as an important and rapidly growing field for stimulating the innovation of high-performance sensors. The fabrication, characterization, and evaluation of the nanostructured electrodes are therefore a focus of this field. Compared to a variety of dry and wet technologies which have been extensively developed for this purpose, electrochemical methods are typically convenient, highly effective, and potentially low-cost for the production of different nanostructures. This minireview is designed to introduce a unique electrochemical method - electrolytic metal-atom enabled manufacturing (EM2) and its application in electrochemical sensors. The EM2 technique employs electrolytic metal atoms generated from their corresponding salt precursor as a tool to nanostructure a wide range of substrate electrodes used in electrochemical sensors, based on a one-pot electrochemical deposition and dissolution of the metal atoms in the same electrolyte bath. Briefly, the metal atoms are electrodeposited on a substrate electrode during the cathode reduction, and they are selectively removed from the substrate during the subsequent anode oxidation. Because of the interactions between the electrolytic metal atoms and the substrate atoms, the repetitive electrodeposition and dissolution of the former on the substrate enable the nanostructuration of the substrate, particularly within its surface layers. The nanostructured electrodes have demonstrated very attractive performance for the determination of numerous analytes, such as high sensitivity and selectivity, high interference tolerance, and low detection limits. However, the EM2 technique and the application of the resulting nanostructured electrodes in electrochemical sensors and beyond have still been very limitedly investigated. In order to bring the community from academic, industries, agencies, and customers together to develop the EM2 technique and advance electrochemical sensor systems, this minireview will introduce the thermodynamic and kinetic fundamentals of this technique, the characterization of resulting nanostructures, the analysis of their electrochemical behavior, and the implementation of this technique for the development of advanced sensor electrodes. Finally, an outlook with a focus on further research areas is provided.

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“…The final copolymers were electrochemically coated onto interdigitated electrodes (IDEs), and sensing was accomplished by determining the change in capacitance upon target vapour adsorption. For nitrobenzene and 2-nitrotoluene, detection thresholds of 200 ppb were reached; for peroxide vapours, ppm values were attained [46].…”

mentioning

confidence: 98%

Overview of nano enabled sensor for analysis of explosive substances

Vaishnav¹,

Bhawara²,

Mishra³

2022

Int. J. Sci. Res. Arch.

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Threats of armed conflict and terrorist attacks present difficult challenges for defense agencies around the world and are an increasing source of worry for the public and security-conscious policymakers. The environmental monitoring of residue or discarded explosives in soil, as well as the detection of ultra-low levels of explosive compounds in remote areas or under extreme conditions for anti-terrorist activities, continue to pose significant challenges. Most explosives produce very little vapors, making it difficult to detect them with common techniques for other compounds. Due to a number of factors, including the large variety of explosives substances, the enormous number of deployment methods, and the dearth of low-cost sensors with high sensitivity and selectivity makes explosive detection very complicated and expensive task. To defeat explosives-based terrorism, sensors must have high sensitivity and selectivity as well as the capacity to produce and deploy them at lower costs. Nanotechnology-based sensors have an excellent possibility of meeting all the criteria for a successful approach to explosive trace detection. The design and analytical capabilities of explosive detection systems employing nanomaterial as signal transducers are covered in this overview. The review article also discusses the importance of nano-enabled technologies for the explosive detection in security applications, gives background on the technology, and identifies other issues that need to be resolved.

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Miniature Nitro and Peroxide Vapor Sensors Using Nanoporous Thin Films

Cited by 4 publications

References 23 publications

Recent Developments in the Field of Explosive Trace Detection

Recent Developments in the Field of Explosive Trace Detection

Review—Electrolytic Metal Atoms Enabled Manufacturing of Nanostructured Sensor Electrodes

Overview of nano enabled sensor for analysis of explosive substances

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