Reliability and selectivity of H2 sensors composed of Pd Film nanogaps on an elastomeric substrate

Kim, Wonkung; Jang, Byungjin; Lee, Hyun Sook; Lee, Wooyoung

doi:10.1016/j.snb.2015.10.092

Cited by 43 publications

(19 citation statements)

References 17 publications

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“…Figure 4b shows how a partially suspended Pd structure relieves the stress compared with a fully anchored Pd structure in a mechanical simulation. There was also an attempt to create a high‐sensitivity sensor by utilizing volume expansion through the application of specific nanomaterial structures 83,84,195–199. When nanogaps are manufactured in an aligned and controlled form with consideration of volume expansion depending on the concentration of H 2 , a switch‐type H 2 sensor could be produced (Figure 4c,d).…”

Section: High‐performance Sensors Using Geometrically Structured Nanomentioning

confidence: 99%

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Seo

Yoo

et al. 2020

Advanced Materials

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Recently, geometrically structured nanomaterials have received great attention due to their unique physical and chemical properties, which originate from the geometric variation in such materials. Indeed, the use of various geometrically structured nanomaterials has been actively reported in enhanced‐performance devices in a wide range of applications. Recent significant progress in the development of geometrically structured nanomaterials and associated devices is summarized. First, a brief introduction of advanced nanofabrication methods that enable the fabrication of various geometrically structured nanomaterials is given, and then the performance enhancements achieved in devices utilizing these nanomaterials, namely, i) physical and gas nanosensors, ii) nanoelectromechanical devices, and iii) nanosieves are described. For the device applications, a systematic summary of their structures, working mechanisms, fabrication methods, and output performance is provided. Particular focus is given to how device performance can be enhanced through the geometric structures of the nanomaterials. Finally, perspectives on the development of novel nanomaterial structures and associated devices are presented.

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Section: High‐performance Sensors Using Geometrically Structured Nanomentioning

confidence: 99%

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Seo

Yoo

et al. 2020

Advanced Materials

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“…Until now, several types of materials have been used to develop sensitive films. These include polymers [3,4] metal oxides [5,6], and composite materials [7,8,9]. Each of these types of materials can improve the sensibility of the film, but by using composite materials we can obtain both new material properties and improved properties.…”

Section: Introductionmentioning

confidence: 99%

“…As thin films for hydrogen detection, palladium is noted for its ability to dissociate the hydrogen molecule [9]. Also, oxidic films [5], as well as composite films [17,18,19] are often used in the development of hydrogen sensors.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Detection with SAW Polymer/Quantum Dots Sensitive Films

Constantinoiu

Viespe

2019

Sensors

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Regarding the use of hydrogen as a fuel, it is necessary to measure its concentration in air at room temperature. In this paper, sensitive composite films have been developed for surface acoustic wave (SAW) sensors, using quantum dots (QDs) and polymers. Si/SiO2 QDs were used due to having a high specific surface area, which considerably improves the sensitivity of the sensors compared to those that only have a polymer. Si/SiO2 QDs were obtained by laser ablation and analyzed by X-ray diffraction and transmission electron microscopy (TEM). Two types of polymers were used: polydimethylsiloxane (PDMS) and polymethylmethacrylate (PMMA). Polymer and polymer with QDs compositions were deposited on the sensor substrate by drop casting. A heat treatment was performed on the films at 80 °C with a thermal dwell of two hours. The sensors obtained were tested at different hydrogen concentrations at room temperature. A limit of detection (LOD) of 452 ppm was obtained by the sensor with PDMS and Si/SiO2 QDs, which was heat treated. The results demonstrated the potential of using QDs to improve the sensitivity of the SAW sensors and to achieve a heat treatment that increases its adsorption capacity of the gas molecules.

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“…Основная проблема при создании газовых сенсоров на гибких подложках связана с разработкой технологии получения материала газочувствительного слоя. В качестве таких материалов предлагается использовать углеродные нанотрубки [10], слои графена и оксида графена [11], проводящие полимеры [12], металлооксиды [13] и некоторые металлы [14]. Все они обладают собственными характерными достоинствами и недостатками, и в зависимости от конкретного детектируемого газа и условий эксплуатации конечного устройства целесообразным представляется использование того или иного материала.…”

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Адаптация Золь-Гель Технологии Наноструктурированного Оксида Цинка Для Целей Гибкой Электроники

Аверин¹,

Пронин²,

Якушова³

et al. 2019

Журнал Технической Физики

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The possibility of replacing classical sol-gel operation methods of high-temperature annealing by photo-annealing using ultraviolet-range radiation has been analyzed. A technique for synthesizing hierarchically organized zinc oxide films using sol-gel technology based on the parallel combination of low-temperature treatment and UV photo-annealing is proposed. Spectroscopic studies of the qualitative composition of the film-forming sol and nanomaterials based on it, obtained on various types of substrates, have been carried out before and after initiation of photochemical reactions.

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Reliability and selectivity of H2 sensors composed of Pd Film nanogaps on an elastomeric substrate

Cited by 43 publications

References 17 publications

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Hydrogen Detection with SAW Polymer/Quantum Dots Sensitive Films

Адаптация Золь-Гель Технологии Наноструктурированного Оксида Цинка Для Целей Гибкой Электроники

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