Atomic layer deposition to heterostructures for application in gas sensors

Pan, Hongyin; Zhou, Lihao; Wang, Zheng; Liu, Xianghong; Zhang, Jun; Pinna, Nicola

doi:10.1088/2631-7990/acc76d

Cited by 17 publications

(9 citation statements)

References 101 publications

(128 reference statements)

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“…Then, Fe 2 O 3 was etched by Ar plasma treatment for a certain time to form Fe 2 O 3 –V o rich in oxygen vacancies. Further, five cycles of metal Pt were deposited on the surface of Fe 2 O 3 nanosheets by atomic layer deposition (ALD). , Finally, Pt–Fe 2 O 3 –V o samples were obtained by hydrogenation of oxidized Pt in an Ar/H 2 atmosphere.…”

Section: Resultsmentioning

confidence: 99%

Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing

Zhang,

Chang,

Zhou

et al. 2024

ACS Sens.

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Single-atom catalysts (SACs) hold great promise in highly sensitive and selective gas sensors due to their ultrahigh atomic efficiency and excellent catalytic activity. However, due to the extremely high surface energy of SACs, it is still a huge challenge to synthesize a stable single-atom metal on sensitive materials. Here, we report an atomic layer deposition (ALD) strategy for the elaborate synthesis of single-atom Pt on oxygen vacancy-rich Fe 2 O 3 nanosheets (Pt−Fe 2 O 3 −V o ), which displayed ultrafast and sensitive detection to H 2 , achieving the stability of Pt single atoms. Gassensing investigation showed that the Pt−Fe 2 O 3 −V o materials enabled a significantly enhanced response of 26.5−50 ppm of H 2 , which was 17-fold higher than that of pure Fe 2 O 3 , as well as ultrafast response time (2 s), extremely low detection limit (86 ppb), and improved stability. The experimental and density functional theory (DFT) studies revealed that the abundant oxygen vacancy sites of Fe 2 O 3 contributed to stabilizing the Pt atoms via electron transfer. In addition, the stabilized Pt atoms also greatly promote the electron transfer of H 2 molecules to Fe 2 O 3 , thereby achieving an excellent H 2 sensing performance. This work provides a potential strategy for the development of highly selective and stable chemical sensors.

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Section: Resultsmentioning

confidence: 99%

Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing

Zhang,

Chang,

Zhou

et al. 2024

ACS Sens.

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“…This technique offers the capability to uniformly distribute nanoparticles on suitable supports, ranging in size from nanometers to single atoms [155][156][157][158]. Additionally, ALD exhibits the ability to penetrate high surface area porous supports, making it well-suited for the synthesis of gas sensing materials [159]. Typically, the preparation of SACs via the ALD technique involves four steps (figure 5(a)) [92,[130][131][132].…”

Section: Atomic Layer Depositionmentioning

confidence: 99%

Preparation of single atom catalysts for high sensitive gas sensing

He,

Guo,

et al. 2024

Int. J. Extrem. Manuf.

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Single atom catalysts (SACs) have received enormous attention in the field of catalysis in the last decade due to their maximum atom utilization as well as unique physical and chemical properties. For the semiconductor-based electrical gas sensor, the core is the catalysis process of target gas molecules on the sensitive materials. In this scenario, the SACs would be used for highly sensitive and selective gas sensing, however, only some of bubbles come to the surface. To realize its practical applications, the preparation strategies for SACs are reviewed systematically. The aggregation and low loading of SACs are still the main challenges. Following, the interaction between the SACs and the target gas molecules and its supports is unrevealed to explain the improvement of sensing performances. Furthermore, the typical applications of SACs in the different gases sensing are highlighted, revealing its superiority of high sensitivity and selectivity. Finally, the challenges and future perspectives on the SACs based gas sensing are presented.

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“…Gas sensors are capable of converting the composition and concentration information of the measured gas into electrical signals [65], which can be considered as simulated olfactory perception. Zhou et al propose a piezotronic effect enhanced gas sensor based on ZnO NW, which can be used to detect hydrogen (H 2 ) and nitrogen dioxide (NO 2 ) gases (figure 6(c-i)) [63].…”

Section: Piezotronic Devices For Sensing Functionsmentioning

confidence: 99%

Piezotronic neuromorphic devices: principle, manufacture, and applications

Lin,

Feng,

Xiong

et al. 2024

Int. J. Extrem. Manuf.

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With the arrival of the era of artificial intelligence (AI) and big data, the explosive growth of data has raised higher demands on computer hardware and systems. Neuromorphic techniques inspired by biological nervous systems are expected to be one of the approaches to break the von Neumann bottleneck. Piezotronic neuromorphic devices modulate electrical transport characteristics by piezopotential and directly associate external mechanical motion with electrical output signals in an active manner, with the capability to sense/store/process information of external stimuli. In this review, we have presented the piezotronic neuromorphic devices (which are classified into strain-gated piezotronic transistors and piezoelectric nanogenerator (PENG)-gated field effect transistors based on device structure) and discussed their operating mechanisms and related manufacture techniques. Secondly, we summarize the research progress of piezotronic neuromorphic devices in recent years and provide a detailed discussion on multifunctional applications including bionic sensing, information storage, logic computing, and electrical/optical artificial synapses. Finally, in the context of future development, challenges, and perspectives, we have discussed how to more effectively modulate novel neuromorphic devices with piezotronic effects. It is believed that the piezotronic neuromorphic devices have great potential for the next generation of interactive sensation/memory/computation to facilitate the development of the Internet of Things, AI, biomedical engineering, etc.

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Atomic layer deposition to heterostructures for application in gas sensors

Cited by 17 publications

References 101 publications

Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing

Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing

Preparation of single atom catalysts for high sensitive gas sensing

Piezotronic neuromorphic devices: principle, manufacture, and applications

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Atomic layer deposition to heterostructures for application in gas sensors

Cited by 17 publications

References 101 publications

Stabilizing Single-Atom Pt on Fe2O3 Nanosheets by Constructing Oxygen Vacancies for Ultrafast H2 Sensing

Stabilizing Single-Atom Pt on Fe2O3 Nanosheets by Constructing Oxygen Vacancies for Ultrafast H2 Sensing

Preparation of single atom catalysts for high sensitive gas sensing

Piezotronic neuromorphic devices: principle, manufacture, and applications

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Product

Resources

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Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing

Stabilizing Single-Atom Pt on Fe₂O₃ Nanosheets by Constructing Oxygen Vacancies for Ultrafast H₂ Sensing