Novel optical fiber humidity sensor based on a no-core fiber structure

Xia, Li; Li, Lecheng; Li, Wei; Tian, Ke; Liu, Deming

doi:10.1016/j.sna.2012.10.041

Cited by 94 publications

(27 citation statements)

References 19 publications

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“…According to the fitting line, the sensitivity of GCSPF sample can achieve up to 0.31 dB/%RH in the range of 75%-95%RH. This sensitivity is higher than 0.13 dB/%RH (6.5 dB in 30-80%RH by using agarose gel) [34], 0.15 dB/%RH (8.8 dB in 20-80%RH by using phenol red doped PMMA film) [35], 0.04 dB/%RH (3 dB in 20-92%RH by using CoCl 2 doped PVA film) [36], 0.196 dB/%RH (8.58 dB in 40-90%RH by using HEC/PVDF hydrogel film) [37], but lower than 0.5 dB/%RH (10 dB in 70-90%RH by using PVA film) [38], 0.52 dB/%RH (13 dB in 75-100%RH by using PDDA/Poly R-478 film) [39]. Adjusting relative humidity between 75% and 95%, and between 40% and 75%, respectively, back and forth for several times, the variation of relative output optical power of GCSPF is depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Reduced graphene oxide for fiber-optic humidity sensing

Xiao¹,

Zhang²,

Cai³

et al. 2014

Opt. Express

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Graphene-based electrical chemical vapor sensors can achieve extremely high sensitivity, whereas the comparatively slow sensing response and recovery, the research focused on only low concentration detection, have been known as drawbacks for many applications requiring rapid and high concentration detection. Here we report a novel graphene-based fiber-optic relative humidity (RH) sensor relying on fundamentally different sensing mechanism. The sensor can achieve power variation of up to 6.9 dB in high relative humidity range (70-95%), and display linear response with correlation coefficient of 98.2%, sensitivity of 0.31 dB/%RH, response speed of faster than 0.13%RH/s, and good repeatability in 75-95%RH. Theoretical analysis of sensing mechanism can explain the experimental result, and reveal the broad applying prospect of the sensor for other kinds of chemical vapor detection. This novel graphene-based optical sensor provides a beneficial complement to the existing electrical ones, and will promote the employment of graphene in chemical sensing techniques.

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Section: Resultsmentioning

confidence: 99%

Reduced graphene oxide for fiber-optic humidity sensing

Xiao¹,

Zhang²,

Cai³

et al. 2014

Opt. Express

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“…1,2 Until now, various transduction techniques were used to develop humidity sensors, such as resistance, 3 capacitance, 4 impedance, 5 optical fiber, 6 and surface acoustic wave (SAW). 7 Moreover, plenty of nanomaterials such as metal oxides, 8, 9 graphene, 10 carbon nanotubes, 11 and nanohybrids 12,13 have been employed to fabricate humidity-sensing devices.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of MoS₂-Modified SnO₂ Hybrid Nanocomposite for Ultrasensitive Humidity Sensing

Zhang

Sun

et al. 2016

ACS Appl. Mater. Interfaces

410

156

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An ultrasensitive humidity sensor based on molybdenum-disulfide- (MoS2)-modified tin oxide (SnO2) nanocomposite has been demonstrated in this work. The nanostructural, morphological, and compositional properties of an as-prepared MoS2/SnO2 nanocomposite were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive spectrometry (EDS), nitrogen sorption analysis, and Raman spectroscopy, which confirmed its successful preparation and rationality. The sensing characteristics of the MoS2/SnO2 hybrid film device against relative humidity (RH) were investigated at room temperature. The RH sensing results revealed an unprecedented response, ultrafast response/recovery behaviors, and outstanding repeatability. To our knowledge, the sensor response yielded in this work was tens of times higher than that of the existing humidity sensors. Moreover, the MoS2/SnO2 hybrid nanocomposite film sensor exhibited great enhancement in humidity sensing performances as compared to the pure MoS2, SnO2, and graphene counterparts. Furthermore, complex impedance spectroscopy and bode plots were employed to understand the underlying sensing mechanisms of the MoS2/SnO2 nanocomposite toward humidity. The synthesized MoS2/SnO2 hybrid composite was proved to be an excellent candidate for constructing ultrahigh-performance humidity sensor toward various applications.

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“…So, a special solution is used to solve this problem. In accordance with the requirements of precision and symmetry, a variety of coating methods can be selected from the dip impregnation, chemical corrosion, electrostatic self‐assembly, ionization, etc …”

Section: Sensitive Materialsmentioning

confidence: 99%

Research Advances in Microfiber Humidity Sensors

Peng

Zhao

Chen

et al. 2018

Small

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An overview of the numerous latest research in microfiber humidity sensors is carried out with a specific focus on measurement methods, humidity sensitive materials, probe structures, and sensing properties of different sensors. First, five mainstream measurement structures, including taper, fiber grating, coupler, resonator, and interferometer are reviewed. It is concluded that these measurement structures sense the physicochemical property variations of microfibers or sensitive films and exhibit the change of optical signal when exposed to environment. Second, the basic preparation methods, humidity‐sensing properties, and their advantages and disadvantages as humidity sensitive material are addressed. Then, the advantages and disadvantages of all the above sensing structures are also discussed and compared. Finally, the main existing problems and potential solutions of microfiber humidity sensors are pointed out.

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Novel optical fiber humidity sensor based on a no-core fiber structure

Cited by 94 publications

References 19 publications

Reduced graphene oxide for fiber-optic humidity sensing

Reduced graphene oxide for fiber-optic humidity sensing

Facile Fabrication of MoS₂-Modified SnO₂ Hybrid Nanocomposite for Ultrasensitive Humidity Sensing

Research Advances in Microfiber Humidity Sensors

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Novel optical fiber humidity sensor based on a no-core fiber structure

Cited by 94 publications

References 19 publications

Reduced graphene oxide for fiber-optic humidity sensing

Reduced graphene oxide for fiber-optic humidity sensing

Facile Fabrication of MoS2-Modified SnO2 Hybrid Nanocomposite for Ultrasensitive Humidity Sensing

Research Advances in Microfiber Humidity Sensors

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Product

Resources

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Facile Fabrication of MoS₂-Modified SnO₂ Hybrid Nanocomposite for Ultrasensitive Humidity Sensing