A Set of Platforms with Combinatorial and High-Throughput Technique for Gas Sensing, from Material to Device and to System

Mao, Zhenghao; Wang, Jianchao; Gong, Yuefa; Yang, Heng; Zhang, Shunping

doi:10.3390/mi9110606

Cited by 12 publications

(7 citation statements)

References 30 publications

(33 reference statements)

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“…Hydrogen getters were placed in a 50 L sealed container fulfilled by standard gases with an initial pressure of 1 bar, consisting of air and 1000 ppm hydrogen. High precision sensors with a limit of detection of 1 ppm , were used to monitor the c(H 2 ). Powder getters, porous sheets, and compact sheets were tested, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Polymer Framework with Continuous Pores for Hydrogen Getters: Molding and a Boost in Getter Rate

Dong

Wang

et al. 2020

ACS Appl. Polym. Mater.

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The hydrogen getter consisting of 1,4-bis[phenylethynyl]benzene (DEB) and a carbon-supported palladium catalyst (Pd/C) is limited by its powder forms in practical application. Development of the molded DEB-Pd/C is thus highly demanded. To solve the contradiction between molding and hydrogen-getter rate, herein, we prepared a porous polymer matrix composite for DEB-Pd/C by a facile one-phase removal method of their cocontinuous polymer matrices. Such a porous composite exhibits excellent hydrogen-getter activities. More interestingly, under low hydrogen partial pressure, the porous composite had a faster getter rate than that of powder getters. The significantly enhanced activity is attributed to the confinement effects of the continuous pore structure of the polymer frameworks, which further indicates its promise as a highly active and flexible supporting framework for hydrogen absorption or other gas–solid reactions.

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Section: Resultsmentioning

confidence: 99%

“…This set of experiments was done in a self-built equipment, which measured concentration of hydrogen (c(H 2 )) by hydrogen sensor. The Pt-SnO 2 -based hydrogen sensor , was provided by Dr. Shunping Zhang and calibrated and fitted with 12 different c(H 2 ) points. The hydrogen-absorbing sample was placed into the 50 L chamber.…”

Section: Methodsmentioning

confidence: 99%

Polymer Framework with Continuous Pores for Hydrogen Getters: Molding and a Boost in Getter Rate

Dong

Wang

et al. 2020

ACS Appl. Polym. Mater.

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“…For faster and more convenient screening, the high‐throughput automated fabrication of sensing materials is also necessary. Mao et al [ 568 ] fabricated 55 different sensing films using pure, Pt‐, Rh‐, Ru‐, Pd‐, Ir‐, Au‐, and Ag‐loaded SnO 2 NPs with an inkjet printing method and demonstrated unmanned testing platform. It should be noted that 400 different sensor compositions can be made by mixing the six kinds of jettable inks, and the times for solution mixing and film printing are two and three minutes, respectively.…”

Section: High‐throughput Screening Of Diverse Sensing Materials For Amentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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With rapid progress in device integration and computing power, the realization of highly miniaturized one-chip artificial olfaction with superior performance is close and should be further supported by the rational design of chemical sensors and chemical sensing materials. The number of gas sensors tends to increase in order to sniff more complex odors with the progress of civilization. This explains the evolution from a single chemical sensor to complicated artificial olfaction using sensor arrays. At the advent of oxide chemiresistive gas sensors in the 1960s and 1970s, a single gas sensor was widely used to detect toxic, explosive, dangerous, and harmful gases, such as CO, C 3 H 8 , CH 4 , H 2 S, and NO 2 , in a selective manner. [26,27] However, a single sensor is often insufficient for recognizing most of the natural odors encountered in daily life, which consist of hundreds to thousands of different chemicals. [28] In the mammalian olfactory system, odorants are initially detected by olfactory receptors (ORs) covering the surface of the cilia projected from olfactory sensory neurons (OSNs), which are located in the olfactory epithelium lining the nasal cavity. These signals are transmitted to the glomeruli in the olfactory bulb, where a high degree of signal integration happens (Figure 1a). [29] Finally, the signals are sent through mitral cells to a higher brain region (olfactory cortex), and the signals are subsequently combined or modified in a variety of ways by parallel processing for analysis and interpretation (Figure 1b). [30] Each OR can detect various kinds of odorants, and similarly, each odorant can also be recognized by a number of ORs. That is, the olfactory system determines multiple odorants from various combinations of ORs (Figure 1c). [31] For better olfaction, both OSNs and ORs should be abundant. A larger number of OSNs is advantageous for detecting trace concentrations of analytes and ligands. [32] For instance, dogs with more OSNs are better than humans at detecting explosives, searching and rescuing, diagnosing disease, and assessing agricultural products. [33] If a mammal can detect larger numbers of faint gas components within odors, he can perceive and identify the odors more accurately. From this perspective, gas sensors with lower detection limits would be assembled to the stronger artificial olfaction. Kinds of ORs are also important. Mammals are known to have ≈1000 different kinds of ORs, and combinations of dissimilar ORs enable the discrimination of a myriad of odorants. [29] To mimic this, sensor arrays consisting of small number (5-20) of sensors that show Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machinelearning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable onc...

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“…Papers [1,2] deal with sensing material preparation and the characterization of the chemico-physical and sensing properties, while further studies report about the investigation of sensing performance towards different operating conditions [3] and the optimization of the transduction mechanism and of the device package [4]. Furthermore, there are three papers focused on gas sensor systems and their application in environmental monitoring [5,6] and in the biomedical field [7].…”

mentioning

confidence: 99%

“…Mao et al present a set of hardware platforms to improve the efficiency of new developed E-nose; the proposed system includes a gas-sensing, film-parallel, synthesis platform, a high-throughput gas sensing unmanned testing platform, and a handheld E-nose system. The sensor arrays are produced by inkjet printing, tailoring the devices for the specific application [6].…”

mentioning

confidence: 99%

Editorial for the Special Issue on Nanostructure Based Sensors for Gas Sensing: from Devices to Systems

Donato

Grassini

2019

Micromachines

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The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of new portable measurement systems with sensing and identification performances comparable with those of most sophisticated analytical techniques. In such a context, a lot of effort must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and structure, in the electrical characterization of the sensor prototypes, as well as in the design of suitable measurement setups. [...]

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A Set of Platforms with Combinatorial and High-Throughput Technique for Gas Sensing, from Material to Device and to System

Cited by 12 publications

References 30 publications

Polymer Framework with Continuous Pores for Hydrogen Getters: Molding and a Boost in Getter Rate

Polymer Framework with Continuous Pores for Hydrogen Getters: Molding and a Boost in Getter Rate

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

Editorial for the Special Issue on Nanostructure Based Sensors for Gas Sensing: from Devices to Systems

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