Absorbance response of a graphene oxide coated U-bent optical fiber sensor for aqueous ethanol detection

Gao, Shoubao; Qiu, Hengwei; Zhang, Chao; Jiang, Shou Zhen; Li, Z.; Liu, Xiaoyun; Yue, Weiwei; Yang, Cheng; Huo, Yanyan; Feng, Dejun; Li, Hongsheng

doi:10.1039/c5ra22211g

Cited by 49 publications

(20 citation statements)

References 31 publications

(24 reference statements)

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“…In Figure 5 , the shifts in nm of S0, SGO1b, SGO2b and SGO4b LMR peaks are represented as a function of the ethanol concentration of the solutions. The responses recorded as ethanol concentrations were increased and then decreased again confirmed that the sensors present high repeatability and reversibility, improving other works found in the literature [ 27 ]. There was no obvious hysteresis in the response since the maximum variation between the measurements was only 2 nm and the distribution of the variance was random.…”

Section: Resultssupporting

confidence: 84%

“…However, as a reference, recent works based on other phenomena showed rise and fall times of 40 and 70 s [ 25 ], 13 and 6 s [ 26 ], more than 10 min [ 37 ]. Authors could just find a work presenting similar dynamic times [ 27 ]. From these results, it can be concluded that the sensor presented here shows a fast reaction and recovery.…”

Section: Resultsmentioning

confidence: 99%

“…Most available commercial ethanol sensors are electrical transducers based on resistance and voltage [ 23 , 24 ]. However, the high flammability and volatility of ethanol make optical fiber sensors an ideal candidate for safe and accurate measurement of this substance [ 25 , 26 , 27 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection

Hernáez

Mayes

Melendi-Espina

2017

Sensors

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The influence of graphene oxide (GO) over the features of an optical fiber ethanol sensor based on lossy mode resonances (LMR) has been studied in this work. Four different sensors were built with this aim, each comprising a multimode optical fiber core fragment coated with a SnO2 thin film. Layer by layer (LbL) coatings made of 1, 2 and 4 bilayers of polyethyleneimine (PEI) and graphene oxide were deposited onto three of these devices and their behavior as aqueous ethanol sensors was characterized and compared with the sensor without GO. The sensors with GO showed much better performance with a maximum sensitivity enhancement of 176% with respect to the sensor without GO. To our knowledge, this is the first time that GO has been used to make an optical fiber sensor based on LMR.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection

Hernáez

Mayes

Melendi-Espina

2017

Sensors

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“…After the AgNPs/PCu@Si was rinsed by deionized water, and dried in the N 2 atmosphere. In order to control the number of layers of the GO, we choose to control the concentration and volume of the GO suspension, then the 50 μL and 0.5 mg/mL GO (obtained using the modified Hummers method22) suspension was deposited on the surface of the AgNPs/PCu@Si substrate by a dip-coating method. The prepared GO/AgNPs/PCu@Si substrate sealed in the nitrogen atmosphere was ready for the SERS measurements.…”

Section: Methodsmentioning

confidence: 99%

High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si

Zhang

et al. 2016

Sci Rep

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We present a novel surface-enhanced Raman scattering (SERS) substrate based on graphene oxide/silver nanoparticles/copper film covered silicon pyramid arrays (GO/AgNPs/PCu@Si) by a low-cost and simple method. The GO/AgNPs/PCu@Si substrate presents high sensitivity, good homogeneity and well stability with R6G molecules as a probe. The detected concentration of Rhodamine 6 G (R6G) is as low as 10−15 M. These sensitive SERS behaviors are also confirmed in theory via a commercial COMSOL software, the electric field enhancement is not only formed between the AgNPs, but also formed between the AgNPs and Cu film. And the GO/AgNPs/PCu@Si substrates also present good property on practical application for the detection of methylene blue (MB) and crystal violet (CV). This work may offer a novel and practical method to facilitate the SERS applications in areas of medicine, food safety and biotechnology.

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“…U-shaped probes have been demonstrated to have a 10-fold improvement in absorbance sensitivity over straight probes [37]. The use of U-shaped optical fiber as chemical probes seems to be popular over the last two decades, with the fiber used in probes for various chemicals and features of chemicals, including benzene [38], ethanol [39][40][41], toluidine blue [42], pH levels [43], glucose [44,45], and salt [46], but few of studies as a biosensor especially in miRNA of cancer. The sensitive property of U-shaped optical fiber to the external environment is quite suitable for low-concentration bio-detectors analytics.…”

Section: Introductionmentioning

confidence: 99%

A Lamping U-Shaped Fiber Biosensor Detector for MicroRNA

Wen¹,

Huang²,

Li³

et al. 2020

Sensors

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This study presents a U-shaped optical fiber developed for a facile application of microRNA detection. It is fabricated by the lamping process and packaged in a quartz tube to eliminate human negligence. In addition, silanization and electrostatic self-assembly are employed to bind gold nanoparticles and miRNA-133a probe onto the silicon dioxide of the fiber surface. For Mahlavu of hepatocellular carcinoma (HCC), detection is determined by the wavelength shift and transmission loss of a U-shaped optical fiber biosensor. The spectral sensitivity of wavelength and their coefficient of determination are found at −218.319 nm/ ng/mL and 0.839, respectively. Concurrently, the sensitivity of transmission loss and their coefficient of determination are found at 162.394 dB/ ng/mL and 0.984, respectively. A method for estimating the limit of detection of Mahlavu is at 0.0133 ng/mL. The results show that the proposed U-shaped biosensor is highly specific to miRNA-133a and possesses good sensitivity to variations in specimen concentration. As such, it could be of substantial value in microRNA detection.

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Absorbance response of a graphene oxide coated U-bent optical fiber sensor for aqueous ethanol detection

Abstract: In this work, the dynamic change of the absorbance for aqueous ethanol detection based on a graphene oxide coated U-bent optical fiber sensor was investigated.

Cited by 49 publications

References 31 publications

Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection

Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection

High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si

A Lamping U-Shaped Fiber Biosensor Detector for MicroRNA

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