FOOD CHEMISTRY
·
2024
·
IF 8.5
Ze Xu,Li Jin,Bowen Yang,Wenwen Wang,Yukun Yang,Guanjun Wang,Jizhou Wu,Dandan Sun,Jie Ma
A molecularly imprinted polymer (MIP) based microfiber differential demodulation sensing system for sodium benzoate (SB) concentration detection is proposed. The specific binding of MIP on the surface of microfibers with SB can lead to changes in local refractive index (RI). RI change induces a drift in the interference wavelength, which can be monitored by the power difference between two fiber Bragg gratings (FBGs). The sensing system can detect SB in the concentration range of 0.1–50 μg/ml, and interference wavelength and FBG power difference sensitivities are 0.55 nm/(μg/ml) and 2.64 dB/(μg/ml) in the low concentration range of 0.1–1 μg/ml, respectively, with a limit of detection (LOD) of 0.1 μg/ml. This microfiber differential demodulation sensing system is not only simple to fabricate, but also simplifies the demodulation equipment to reduce the cost, which providing a simple, reliable and low-cost technique for the quantitative detection of SB concentration in beverages and flavoured foods.
研究领域:
食品科学
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光学传感
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS LETTERS
·
2015
·Vol. 40
·期 15
·3576-3579
·
IF 3.292
Jin-hui Chen,Guo-qing Deng,Shao-cheng Yan,Cheng Li,Kai Xi,Fei Xu,Yan-qing Lu
Based on the liquid exfoliated method, we obtained the few-layer molybdenum disulfide (MoS2) nanoplates solution. By thermal evaporation method, we directly deposited MoS2 thin film onto the facet of a fiber patch cord. The modulation depth of the film is as high as 29%, and a Q-switched fiber laser was achieved. We also provided a new method to continuously tune the output laser with a tuning sensitivity of ∼5.5 nm/(1% strain) by controlling the cavity loss with a strained microfiber coupler (MFC).
研究领域:
光学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Jie Liu,Yinping Miao,Xiaolan Li,Mingpan Bi,Yanxi Wang,Yang Zhang
Streptomycin sulfate (STS) is one of the major sources of contamination in water. Excessive intake of STS can be a serious health hazard to humans, causing vestibular and auditory nerve damage, nephrotoxicity, myasthenia gravis or Parkinson’s disease. To address this, we propose an STS concentration sensor leveraging multiwalled carbon nanotubes (MWCNTs) and the vernier effect of a microfiber coupler (MFC). The vernier effect of MFC is caused by the interference of two supermodes in two orthogonal polarizations in a refringent optical fiber, and the high sensitivity can be achieved directly by monitoring the vernier envelope. MWCNTs can adsorb more biomolecules to enhance the light absorption of analytes to further improve the detection sensitivity. The influence of MFC structure parameters on sensor performance is analyzed by simulation and verified by experiment. Theoretical analyses and experimental results indicate that for specific diameter MFC, the sensor will have better performance. The sensor exhibits a remarkably high sensitivity of 1577.5 nm/(mg/ml) in the detection range of 0.02-0.1 mg/ml, namely sensitivity amplification factor nearly one order of magnitude, and the sensor achieves an ultralow limit of detection of 12.68 ng/ml. The vernier effect of MFC and the modification of MWCNTs effectively enhance the sensitivity of the STS sensor. The device does not require complex pretreatment or antibody preparation, making it highly promising for applications in food safety, environmental pollution, and health monitoring.
研究领域:
生物医学工程
·
环境科学
·
光学传感
✓ 已验证
DOI
高影响因子
TALANTA
·
2016
·
IF 4.035
Bo Yu,Yunyun Huang,Jun Zhou,Tuan Guo,Bai-Ou Guan
A sensitive Ag + sensor based on nucleic acid probes modified silica microfiber interferometry is designed and developed. The probes on microfiber surface plays the part on catching Ag + as tentacles, while their conformation change from random coils to hairpins. It induces the fiber surface refractive index change, which is captured by the optical fiber and translated into a significant wavelength shift in the interferometric fringe. Such a combination enables an improved concentration sensitivity of 0.22 nm/log M and limit of detection of 1.36 × 10 −9 M, taking the advantage of real-time and in-situ analysis. It shows good selectivity in the present of many other metal ions and offers potential to analysis in real matrix, especially in the environmental samples must be analyzed in a short time. This may provide insights into the preparation of sensing platforms for optical quantification of other small molecular, supplementing the existing tools.
研究领域:
生物传感
·
光学检测
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Dandan Sun,Chenfei Ma,Guoquan Wang,Lili Liang,Guanjun Wang,Jizhou Wu,Jie Ma
An optical system with low cost monitoring, high sensitivity, strong selectivity and much lower nickel ion (Ni 2+ ) content in tap water than the World Health Organization (WHO) standard (1.19 μM) has been prepared by a simple strategy. This proposed ion-imprinted differential modulation system is based on the Bragg grating (FBG) and microfiber interferometer structure, and the interferometer sensing surface is coated with a polydopamine (PDA)/graphene oxide (GO) film to enhance its sensitivity. Combined with the ion imprinting technique, the microfiber interferometer sensor sensitivity can reach 0.32 nm/nM with the detection limit of 0.66 nM in the low concentration range (Ni 2+ concentration range is 0 nM–100 nM). The experiment not only studies the principle of microfiber interferometer and FBG and their refractive index and temperature performance, but also shows that the FBG power change has a good fitting relationship with wavelength change. In addition, this system performance by the amount of power difference rather than the amount of wavelength shift, which significantly saves on the high cost weight, and size associated with the use of spectral analyzers in traditional inspection systems. This study provides a novel and easy method to develop new sensors with higher comprehensive performance.
研究领域:
环境科学
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分析化学
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Optics
·
2020
·Vol. 1
·期 2
·202-212
·
IF 0
Yang Ran,Peng Xiao,Yongkang Zhang,Deming Hu,Zhiyuan Xu,Lili Liang,Bai-Ou Guan
Operando and precisely probing aqueous pH is fundamentally demanded, both in chemical and biological areas. Conventional pH probes, subjected to the larger size, are probably unfit for application in some extreme scenarios, such as a trace amount of samples. In this paper, we have further developed the pH sensor that leverages the microfiber Bragg grating with an ultra-compact size down to an order of magnitude of 10−14m3. Using the electrostatic self-assembly layer-by-layer technique, the functional film consisting of sodium alginate, which harnesses a pH-dependent hygroscopicity, is immobilized on the fiber surface. Consequently, the alteration of aqueous pH could be quantitatively indicated by the wavelength shift of the grating resonance via the refractive index variation of the sensing film due to the water absorption or expulsion. The grating reflections involving fundamental mode and higher order mode exhibit the sensitivities of −72 pm/pH and −265 pm/pH, respectively. In addition, temperature compensation can be facilitated by the recording of the two reflections simultaneously. Furthermore, the modeling and simulation results predict the pivotal parameters of the configuration in sensitivity enhancement. The proposed proof-of-concept enriches the toolbox of pH sensor for catering to the need of detection in some extremely small spaces—for example, the living cells or the bio-tissues.Keywords:fiber optics;microfiber;Bragg grating;sodium alginate;electrostatic self-assembly;pH sensor
研究领域:
生物技术
·
化学工程
✓ 已验证
DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Chenfei Ma,Kang Sun,Guoquan Wang,Guanjun Wang,Dandan Sun,Jie Ma
A microfiber interferometer coated with sensitive films formed by amide bond between 3-Carboxy-4-fluorophenylboronic acid (FPBA) and polydopamine (PDA) for the detection of trace glucose concentration is designed and demonstrated. Due to a huge evanescent field, this microfiber interferometer has a very sensitive response to the refractive index (RI) of the surrounding environment, which has excellent sensing performance including RI sensitivity response of 1825.83 nm/RIU and low temperature response of −0.04 nm/°C. Due to the good film-forming performance of PDA, whose the amino group coupled with the carboxyl molecule on FPBA to form an amide bond, PDA/FPBA can be attached to the microfiber interferometer for detecting different concentrations of glucose. The concentration range of glucose detection is 0.1–20 mM with a sensitivity of 1.71 nm/mM and a limit of detection of 12.6 ppm. Finally, the sensor is tested in actual samples of human urine to detect different concentrations of glucose and proved to be responsive and reproducible in urine. We can estimate the concentration of glucose in urine by wavelength shift. The sensor has the advantages of simple manufacture, low cost, high sensitivity, and specific recognition glucose in urine. In addition, the success of this sensor shows that the combination of ultrafine fiber and organic chemical materials has broad prospects in the field of optical detection.
研究领域:
生物医学工程
·
光学检测
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Yongkang Zhang,Heyi Xia,Qiaochu Yang,Zhiyuan Xu,Wenbo Wang,Ziyu Yuan,Zesen Li,Shifang Cao,Bai-Ou Guan,Ling Qiu,Yang Ran
Hydrovoltaic is an emerging technology that aims to harvest energy from water flow and evaporation, in which the plasmonic hydrogen ions are generated by the interaction between water and hydrovoltaic device. However, the volume of the water sample for the interaction is usually ultra-small due to the compact size of hydrovoltaic device, making the quantification and characterization of the hydrogen ions in such water sample an elusive goal. To address this issue, a miniature fiber-optic pH probe is proposed using a unilaterally tapered-microfiber Bragg grating. The microfiber Bragg grating has an intrinsic Bragg reflection signal with a narrow linewidth. The fiber probe is functionalized by coating the sodium alginate, which can respond to the variation of pH mediated by the alteration of the hydrophilicity. The rigidity and robustness of microfiber Bragg grating facilitates the encapsulation of the sensor into a sampling capillary, allowing for the detection of trace aqueous sample less than 2 μL. The pH sensitivity of the tapered-μFBG-based sensor is 62.8 p.m./pH (R 2 = 0.995) with a limit resolution of 0.096 pH. The sensor performed a practical application in the monitoring and characterization of the hydrovoltaic microdevice, which can generate microcurrent as soaked in the water. This work demonstrates a promising technology in the fields of materials, energy, biology and medicine, in which the detection of the microsamples is inevitable.
研究领域:
材料科学
·
能源技术
·
生物学
·
医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2025
·
IF 2.7
Xuesong Zhang,Yue Feng,Weixiang Yuan,Haodong Wu,Tao Shen
The detection of ultra-low concentrations of lithium ions (Li + ) is of paramount importance for protecting human health and preserving the ecological environment. This paper proposes a fiber-optic sensor based on lithium/aluminum layered double hydroxides (Li/Al-LDHs) modified optical microfiber coupler (OMC). Firstly, the optimal diameter of the OMC is determined through simulation analysis to optimize the sensor parameters. Secondly, functional group functionalization is employed to facilitate a robust binding of the Li/Al-LDHs to the surface of the optical fiber. Lastly, the efficacy of the sensor in detecting low concentrations of Li + was validated through experimental means. The results demonstrated that the sensor exhibited a maximum detection sensitivity of 334.222 nm/μM and a limit of detection (LOD) of 1.272 nM within the range of 1–10 nM, exhibiting good linearity (R 2 = 0.986). Furthermore, the sensor displayed excellent stability, selectivity and response time, indicating its potential for application in the detection of Li + concentration in aqueous environments.
研究领域:
环境科学
·
光学传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Dandan Sun,Guoquan Wang,Chenfei Ma,Lili Liang,Yukun Yang,Guanjun Wang,Jizhou Wu,Jie Ma
In this study, we present a differential intensity-modulated system that comprises a tapered microfiber interferometer functionalized with polydopamine /AuNPs/cysteamine hydrochloride and two fiber Bragg gratings (FBGs) for detecting gentamicin in deionized water and milk. As external refractive index (RI) increases, the interference troughs of microfiber are red-shifted, while Bragg wavelengths remain unchanged, leading to a change in the difference in the reflected intensities of two FBGs, thus resulting in differential intensity modulation of external RI. The microfiber interferometer alone in this system demonstrates a wavelength response of 1314.57 nm/RIU to external RI, while the system exhibits an outstanding response of 2713.74 dB/RIU, highlighting its superior performance. The system demonstrates excellent results and selectivity when detecting gentamicin in deionized water and milk, and the wavelength response and differential intensity response reach 27 nm/μM, 80 dB/μM and 31 nm/μM, 70 dB/μM, respectively, with limit of detection of 1.117 ppb, which is lower than the maximum residue limit of 30 ppb in milk. Furthermore, a novel all-fiber demodulation scheme is presented, which holds great promise for the development of portable field measurement systems. These findings demonstrate the efficiency of differential modulation systems with implications for food safety.
研究领域:
生物医学工程
·
食品安全检测
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Guoquan Wang,Dandan Sun,Lili Liang,Guanjun Wang,Jie Ma
An optical fiber sensor for detecting the concentration of trace lead ions is proposed using a polydopamine-maleic acid (PDA-MA) functional membrane coated on the surface of a Mach-Zehnder microfiber interferometer . The PDA-MA functional film is wrapped by a one-step immersion method for in-situ growth on the interferometer surface. The microfiber surface has an excellent evanescent field possessing a sensitivity to the ambient RI of 1243.455 nm/RIU and a low temperature cross-reactivity of −0.04 nm/°C. The absorption of lead ions by carboxyl groups in the fiber-coated functional film changes the refractive index of the sensor surface, which reflects a macroscopic wavelength shift in the interference spectrum. The sensor effectively detects lead ions within 10 −14 -10 −6 mol/L concentrations and has a sensitivity of 1.85 × 10 8 nm/(mol/L) in the ultra-low concentration range of 10 −14 -10 −10 mol/L with a detection limit of 0.1678 ppb. The proposed sensor is not only simple and low cost to fabricate, but also has good stability and specificity. The success of this sensor shows that the development of optical microfiber sensor with high stability and accuracy is feasible, which has progressive significance for the research of optical environmental pollution sensor.
研究领域:
环境科学
·
光学传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
·
2025
·
IF 5.9
Hao-Yuan Cao,Yingying Hu,Liang Fang,Bin Liu,Juan Liu,Hong Yang,Yue Zhang,Yue Fu,Wenbo Xiao,Qiang Wu
A 1-D convolutional neural network (1-D CNN) is proposed to extract information collected from a U-shape single-mode-tapered seven core-single (STSS)-mode structure interferometer and demonstrated by measuring surrounding refractive index (RI) as a typical example of its application. Compared with the traditional dip/peak wavelength tracking method, the 1-D CNN method can effectively improve the accuracy of measurement through extracting full-spectrum information. The coefficient of determination ( $R^{2}$ ) of the RI predicted by 1-D CNN is as high as 0.992. At the same time, the effects of bandwidth and sampling points on the RI measurement accuracy are studied; by reducing the spectral sampling resolution and bandwidth, the prediction results are higher than 0.990 and 0.989, and the results show that the method of machine learning can adapt to the low sampling frequency and bandwidth. The proposed RI optical fiber sensing system has good application potential in medical and environmental monitoring fields.
研究领域:
生物医学工程
·
光学传感
·
分子诊断
·
环境监测
·
医疗检测技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）