MoS2-based all-fiber humidity sensor for monitoring human breath with fast response and recovery

Du, Bobo; Yang, Di; She, Xiaoyang; Yuan, Yuan; Mao, Dong; Jiang, Yajun; Lu, Fanfan

doi:10.1016/j.snb.2017.04.193

Cited by 155 publications

(62 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data from the response (recovery) stage were fitted by the exponential equation

P = P_{1} + A_{1} \exp [- \frac{t - t_{1}}{τ_{response}}] (P = P_{2} + A_{2} \exp [- \frac{t - t_{2}}{τ_{recovery}}])

, where P , P 1 , and P 2 represent the optical power; A 1 and A 2 are the fitting coefficients; and t 1 and t 2 are the times. A very fast response time of 7 ms was achieved, indicating a significantly enhanced responsive characteristic compared with other reported humidity sensors using 2D materials (Table ) . It is expected that the improvement in the surface area of BP nanosheets would lead to increased responsivity.…”

Section: A Comparison Of Response Time Obtained By Different Methodsmentioning

confidence: 73%

See 1 more Smart Citation

Black Phosphorus All‐Fiber Sensor for Highly Responsive Humidity Detection

Wang

et al. 2020

Physica Rapid Research Ltrs

Self Cite

View full text Add to dashboard Cite

Black phosphorus (BP) promises high‐performance humidity sensing, due to its unique electrical, mechanical, and surface properties. Different from traditional transistor‐based BP humidity sensors, herein, an all‐fiber sensing strategy is proposed by integrating BP nanosheets with etched single‐mode fiber (ESMF). The experiments show that transmitted light in the ESMF can be effectively modulated by the coated BP nanosheets as relative humidity varies from 35% to 80%. Due to the combination of unique sensing characteristics of BP materials with a high sensitivity of optical modulation strategy, highly responsive humidity sensing is achieved with the response time as fast as 7 ms. This work demonstrates a BP‐based all‐optical sensing platform not only for high‐performance humidity sensing, but also for opening up new opportunities for many potential vapor/gas sensing applications in the fields of biomedicine and chemistry.

show abstract

“…The data from the response (recovery) stage were fitted by the exponential equation

P = P_{1} + A_{1} \exp [- \frac{t - t_{1}}{τ_{response}}] (P = P_{2} + A_{2} \exp [- \frac{t - t_{2}}{τ_{recovery}}])

Section: A Comparison Of Response Time Obtained By Different Methodsmentioning

confidence: 73%

“…To further verify the response characteristic of the sensor, a single expiratory pulse was applied to the BP‐coated ESMF . The time‐dependent power variation is shown in Figure b.…”

Section: A Comparison Of Response Time Obtained By Different Methodsmentioning

confidence: 99%

Black Phosphorus All‐Fiber Sensor for Highly Responsive Humidity Detection

Wang

et al. 2020

Physica Rapid Research Ltrs

Self Cite

View full text Add to dashboard Cite

show abstract

“…c) SEM image of MoS 2 ‐based fiber humidity sensor and breathing monitoring results for the bare etched single‐mode fiber (ESMF) and MoS 2 ‐coated ESMF. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Human Chemical Signals Detectionmentioning

confidence: 99%

“…Du et al fabricated a MoS 2 ‐coated etched single‐mode fiber (ESMF) humidity sensor with a diameter of ≈18 µm and a length of ≈15 mm (Figure c) . Because of the interaction between MoS 2 nanosheets and the evanescent field, the optical frequency conductivity changes with relative humidity variation, leading to the power change of transmission light.…”

Section: Human Chemical Signals Detectionmentioning

confidence: 99%

Wearable Electronics Based on 2D Materials for Human Physiological Information Detection

Pang

Yang

et al. 2019

Small

107

118

View full text Add to dashboard Cite

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10. 1002/smll.201901124. Recently, advancement in materials production, device fabrication, and flexi ble circuit has led to the huge prosperity of wearable electronics for human healthcare monitoring and medical diagnosis. Particularly, with the emergence of 2D materials many merits including light weight, high stretchability, excellent biocompatibility, and high performance are used for those potential applications. Thus, it is urgent to review the wearable electronics based on 2D materials for the detection of various human signals. In this work, the typical graphene-based materials, transition-metal dichalcogenides, and transition metal carbides or carbonitrides used for the wearable electronics are discussed. To well understand the human physiological information, it is divided into two dominated categories, namely, the human physical and the human chemical signals. The monitoring of body temperature, electrograms, subtle signals, and limb motions is described for the physical signals while the detection of body fluid including sweat, breathing gas, and saliva is reviewed for the chemical signals. Recent progress and development toward those specific utilizations are highlighted in the Review with the representative examples. The future outlook of wearable healthcare techniques is briefly discussed for their commercialization. Wearable Electronics

show abstract

“…The ever increasing research done on TMDC materials offer an intriguing alternative. For example, Du et al placed exfoliated MoS2 flakes onto the core of a standard step index optical fiber, which had been exposed via etching 9 . The power guided down the fiber was modulated by the humidity of the surrounding area, with a quick response time.…”

Section: Introductionmentioning

confidence: 99%

Composite material hollow core fibers: functionalization with silicon and 2D materials

Lewis

Lucia

Belardi

et al. 2018

Integrated Optics: Devices, Materials, and Technologies XXII

View full text Add to dashboard Cite

Hollow Core Anti-resonant fibers allow for guidance of mid-infrared light at low attenuation and can be used for a variety of applications, such as high power laser transmission and gas sensing. Recent work has seen the integration of silicon 1 into such fibers with linear losses potentially as low as 0.1dB/m. Due to the change in refractive index difference of silicon via for example the free carrier plasma dispersion effect, the prospect of an all optical modulator using such a fiber has been proposed 1 . Here, further work has been undertaken on the integration of functional materials inside hollow core fibers via the deposition of the TMD semiconductor material MoS2, in its few-layered form. Through the use of a liquid precursor, a high quality MoS2 film can be deposited over 30cm length of fiber, as confirmed via Raman spectroscopy. The transmission spectra of these novel composite material hollow core fibers has also been analysed, showing additional loss of around 5dB/m, despite being only around 2nm in thickness. This implies that the refractive index of the integrated material is potentially able to modify the guidance properties of the fiber sample. We will present a comparison of the composite material hollow core fibers we have fabricated to date and discuss the prospects for using these novel waveguides in the active manipulation of light, including optical switching, sensing and frequency generation.

show abstract

MoS2-based all-fiber humidity sensor for monitoring human breath with fast response and recovery

Cited by 155 publications

References 25 publications

Black Phosphorus All‐Fiber Sensor for Highly Responsive Humidity Detection

Black Phosphorus All‐Fiber Sensor for Highly Responsive Humidity Detection

Wearable Electronics Based on 2D Materials for Human Physiological Information Detection

Composite material hollow core fibers: functionalization with silicon and 2D materials

Contact Info

Product

Resources

About