Sensor Technologies Empowered by Materials and Molecular Innovations

Swager, Timothy M.

doi:10.1002/anie.201711611

Cited by 74 publications

(59 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…370,371 Although detectors for CO are available with metal oxide semiconductors (MOS) and solid electrolyte (SE), 10 CNT-based sensors could fill the need for massively distributed or even wearable sensors to prevent poisoning in domestic and industrial environments. 372…”

Section: Cnt-based Sensors For Environmental Monitoringmentioning

confidence: 99%

Carbon Nanotube Chemical Sensors

et al. 2018

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Cnt-based Sensors For Environmental Monitoringmentioning

confidence: 99%

Carbon Nanotube Chemical Sensors

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Analogous to the recent advances made for other classes of challenging analytes, 10 material developments on the molecular level are key to establishing practical CO 2 chemiresistors. Typical ambient CO 2 sensing applications would require quantitative sensing in 10–1000 ppm of CO 2 increments relative to the 0.04% (i.e., 400 ppm) atmospheric level, in air under a wide range of relative humidity (RH).…”

Section: Introductionmentioning

confidence: 99%

Chemiresistive Sensing of Ambient CO₂ by an Autogenously Hydrated Cu₃(hexaiminobenzene)₂ Framework

et al. 2019

View full text Add to dashboard Cite

A growing demand for indoor atmosphere monitoring relies critically on the ability to reliably and quantitatively detect carbon dioxide. Widespread adoption of CO 2 sensors requires vastly improved materials and approaches because selective sensing of CO 2 under ambient conditions, where relative humidity (RH) and other atmosphere contaminants provide a complex scenario, is particularly challenging. This report describes an ambient CO 2 chemiresistor platform based on nanoporous, electrically conducting two-dimensional metal–organic frameworks (2D MOFs). The CO 2 chemiresistive sensitivity of 2D MOFs is attained through the incorporation of imino-semiquinonate moieties, i.e., well-defined N-heteroatom functionalization. The best performance is obtained with Cu 3 (hexaiminobenzene) 2 , Cu 3 HIB 2 , which shows selective and robust ambient CO 2 sensing properties at practically relevant levels (400–2500 ppm). The observed ambient CO 2 sensitivity is nearly RH-independent in the range 10–80% RH. Cu 3 HIB 2 shows higher sensitivity over a broader RH range than any other known chemiresistor. Characterization of the CO 2 -MOF interaction through a combination of in situ optical spectroscopy and density functional theory calculations evidence autogenously generated hydrated adsorption sites and a charge trapping mechanism as responsible for the intriguing CO 2 sensing properties of Cu 3 HIB 2 .

show abstract

“…Since their discovery, conjugated polymers have played an increasingly important role in numerous disruptive technologies. The wide array of structures that constitute the polymer backbone allows their optimization for applications that include lighting and displays, [1] energy generation and storage, [2, 3] sensors, [4, 5] field‐effect transistors, [6, 7] as well as information storage and computing [8] . A variety of conjugated polymer properties can be modified by varying polymer structure, including band gap, HOMO and LUMO levels, extinction coefficient, quantum yield, conductivity, and solubility [9–14] .…”

Section: Introductionmentioning

confidence: 99%

Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of trans‐Cyclooctene Derivatives

2020

View full text Add to dashboard Cite

Asoluble poly(tetrazine) polymer was prepared via Suzuki polycondensation of 3,6-bis(5-bromofuran-2-yl)-1,2,4,5-tetrazine and af luorene diboronate derivative.I tc an undergo efficient and quantitative post-polymerization inverse-electron-demand Diels-Alder click reactions with avariety of trans-cyclooctene (TCO) derivatives.T he resulting polymers were oxidized to convert dihydropyridazine rings into pyridazines.T he absorption spectra of the product polymers,both before and after oxidation, showed hypsochromic shifts that correlated with steric hindrance of the appended side chains.T hey also exhibited as ignificantly enhanced fluorescence intensity relative to the original poly(tetrazine). While gel-permeation chromatography indicated that the product polymers exhibited longer retention times,N MR end-group analysis showed that the polymers retained relatively constant degrees of polymerization. Graft copolymers were easily prepared via reaction with TCO-functionalized poly(ethylene glycol) chains and ac ross-linked foam was produced by reacting the poly(tetrazine) with ab is-TCO crosslinker.

show abstract

Sensor Technologies Empowered by Materials and Molecular Innovations

Cited by 74 publications

References 43 publications

Carbon Nanotube Chemical Sensors

Carbon Nanotube Chemical Sensors

Chemiresistive Sensing of Ambient CO₂ by an Autogenously Hydrated Cu₃(hexaiminobenzene)₂ Framework

Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of trans‐Cyclooctene Derivatives

Contact Info

Product

Resources

About

Sensor Technologies Empowered by Materials and Molecular Innovations

Cited by 74 publications

References 43 publications

Carbon Nanotube Chemical Sensors

Carbon Nanotube Chemical Sensors

Chemiresistive Sensing of Ambient CO2 by an Autogenously Hydrated Cu3(hexaiminobenzene)2 Framework

Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of trans‐Cyclooctene Derivatives

Contact Info

Product

Resources

About

Chemiresistive Sensing of Ambient CO₂ by an Autogenously Hydrated Cu₃(hexaiminobenzene)₂ Framework