A fine single Pd microwire H<sub>2</sub> sensor fabricated by using a femtosecond laser for a wide detection range at room temperature

Zhu, He; Dai, Yunzhi; Sun, Xiang‐Chao; Xia, Hong

doi:10.1039/d2na00462c

Cited by 4 publications

(2 citation statements)

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“…The laser scanned point by point according to the preset processing path. The fabrication system of the FsLDW referred to our previous work [ 27 ]. The femtosecond laser was emitted from a Ti:Sapphire femtosecond oscillator (Mai-Tai HP, Spectra-Physics 3960-X1BB, Milpitas, CA, USA) with a center wavelength of 800 nm, repetition frequency of 80 MHz, and pulse width of 120 fs.…”

Section: Methodsmentioning

confidence: 99%

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

Zhu,

Sun,

Wang

et al. 2024

Nanomaterials

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Flexible strain sensors have a wide range of applications, such as human motion monitoring, wearable electronic devices, and human–computer interactions, due to their good conformability and sensitive deformation detection. To overcome the internal stress problem of solid sensing materials during deformation and prepare small-sized flexible strain sensors, it is necessary to choose a more suitable sensing material and preparation technology. We report a simple and high-performance flexible strain sensor based on liquid metal nanoparticles (LMNPs) on a polyimide substrate. The LMNPs were assembled using the femtosecond laser direct writing technology to form liquid metal microwires. A wearable strain sensor from the liquid metal microwire was fabricated with an excellent gauge factor of up to 76.18, a good linearity in a wide sensing range, and a fast response/recovery time of 159 ms/120 ms. Due to these extraordinary strain sensing performances, the strain sensor can monitor facial expressions in real time and detect vocal cord vibrations for speech recognition.

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Section: Methodsmentioning

confidence: 99%

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

Zhu,

Sun,

Wang

et al. 2024

Nanomaterials

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“…These nanostructures can act as a large number of attachment sites for hydrogen and improve the gas-sensitive performance of the sensor. Recently, Zhu et al have prepared a hydrogen sensor that can be used at room temperature with a detection limit of 0.001% (10 ppm) using Pd combined with fs laser deposition, and the treatment of the sample surface by fs laser processing effectively compensates for the effect of temperature reduction on the gas-sensitive performance of the sensor . In our recent work, we have used a fs laser direct writing technique to induce randomly distributed convexity-like nanostructures on the Si substrate, combined with magnetron sputtering and vacuum thermal evaporation technique, to prepare a Pd/CuO/Si triple-layer structure hydrogen sensor that can be used at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Heterojunction-Type Hydrogen Sensor Based on Silicon Nanoconvexity Induced by Femtosecond Laser

Wu,

Liu,

Yang

et al. 2023

ACS Appl. Nano Mater.

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Simple CuO-based hydrogen sensors at room temperature usually need to be used with precious metals. In this work, a p-CuO/n-Si hydrogen sensor with a nanoconvexity structure is conceived as an effective room-temperature hydrogen sensor without the precious metal decoration. The convexity-like nanostructure was induced on the n-Si substrate surface using the femtosecond (fs) laser direct writing technique. After hydrofluoric acid (HF) treatment, a layer of a p-CuO nanofilm was sputtered to fabricate a pn-junction hydrogen sensor (CuO/fs-Si). The sensor can work at room temperature when hydrogen concentration ranges from 100 to 30,000 ppm. At a hydrogen concentration of 10,000 ppm, the response time constant is 216 s. As a comparison, it is found that a pn-junction-type CuO/Si sensor without fs laser processing (CuO/Si) cannot detect hydrogen with a concentration of less than 10,000 ppm. The nanostructured Si surface improves the sensitivity of the sensor and reduces the detection limit. Operating at room temperature reduces the energy consumption of the sensor and improves applicability. A simple p-CuO/n-Si bilayer structure provides an alternative idea to develop miniaturized, low-power, compatible, and integrated hydrogen sensors.

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Study of argon plasma modified Pd/AlGaN/GaN high electron mobility transistor for superior hydrogen gas detection

Su,

Gao,

et al. 2024

International Journal of Hydrogen Energy

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A fine single Pd microwire H₂ sensor fabricated by using a femtosecond laser for a wide detection range at room temperature

Abstract: We reported a fine H2sensor based on single Pd microwire (SPM) by femtosecond-laser-induced deposition of palladium nanoparticles (PdNPs), which exhibits excellent H2 sensing performance. The PdNPs with good dispersion were...

Cited by 4 publications

References 44 publications

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

Heterojunction-Type Hydrogen Sensor Based on Silicon Nanoconvexity Induced by Femtosecond Laser

Study of argon plasma modified Pd/AlGaN/GaN high electron mobility transistor for superior hydrogen gas detection

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A fine single Pd microwire H2 sensor fabricated by using a femtosecond laser for a wide detection range at room temperature

Abstract: We reported a fine H2sensor based on single Pd microwire (SPM) by femtosecond-laser-induced deposition of palladium nanoparticles (PdNPs), which exhibits excellent H2 sensing performance. The PdNPs with good dispersion were...

Cited by 4 publications

References 44 publications

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire

Heterojunction-Type Hydrogen Sensor Based on Silicon Nanoconvexity Induced by Femtosecond Laser

Study of argon plasma modified Pd/AlGaN/GaN high electron mobility transistor for superior hydrogen gas detection

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A fine single Pd microwire H₂ sensor fabricated by using a femtosecond laser for a wide detection range at room temperature