CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiangqian Li,Jiapei Gu,Zhan Zhou,Lufang Ma,Yiping Tang,Jinwei Gao,Qianming Wang
The generation of novel optical sensing structures through the lanthanide coordination has been a key scientific endeavor. The design of molecular indicator for chemical response is derived from the assembly of a polymeric-based ternary europium (III) complex system (Eu(NTA) 3 L/PVA (NTA = 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dione, L = 2-(4-(4-(allyloxy)phenyl)-6-(pyridin-2-yl)pyridin-2-yl)pyridine, PVA = poly(vinyl acetate)). The electrospinning technique has been employed to create a nanometer scale membrane and this functional film with ultrafine fibers (diameter of about 110 nm) exhibits intense red light at 618 nm under ultra-violet excitation of 340 nm. The luminescent signal transduction involves the interaction of hydrogen chloride (HCl) with the organic ligand. The strong acidity of the analyte induces dissociation of complex network and the evolution of emission from red to blue has been observed. The fabricated nanosensor demonstrates rapid response time (<2 s) and the detection limit has been calculated to be 3.0 ppm. This effective strategy for achieving lanthanide complex-encapsulated polymer fibers will contribute to the development of new intelligent photonic devices.
研究领域:
材料化学
·
分析化学
·
纳米科技
·
光子学
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Xin Liu,Ruoshan Lei,Feifei Huang,Degang Deng,Huanping Wang,Shilong Zhao,Shiqing Xu
BaMoO 4 : Er 3+ /Yb 3+ phosphors with different concentrations have been fabricated by a facile hydrothermal method . The morphology observation shows that the shape and size of BaMoO 4 powders change after Er 3+ /Yb 3+ doping. The upconversion luminescence spectra consist of intense green bands centered at 536 and 558 nm and a weak red emission band peaked at 668 nm upon 980 nm excitation. The excitation power and doping concentration have little impacts on the color emitted from the samples. Applying the fluorescence intensity ratio (FIR) technique, the temperature sensing behaviors are investigated based on thermally coupled levels ( 2 H 11/2 and 4 S 3/2 ) and non-thermally coupled levels ( 4 F 9/2 and 4 S 3/2 ), respectively. The thermometry is sensitive to the excitation power for 4 F 9/2 and 4 S 3/2 levels, leading to large measurement errors caused by the power variation. Such a problem can be solved by using the power-insensitive FIR between 2 H 11/2 and 4 S 3/2 levels, which also shows the advantage of high absolute sensitivity with the maximum of 110.7 × 10 −4 K −1 . So, the developed BaMoO 4 :Er 3+ /Yb 3+ phosphors can be applied in green light upconverters, display devices and temperature sensors .
研究领域:
材料科学
·
光学传感器
·
发光材料
·
光子学
·
稀土掺杂
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2021
·
IF 3.407
Chunyu Zhao,Haiming Qiu,Haijin Chen,Xuehao Hu,Qianqing Yu,Zhenggang Lian,Jingwen Li,Hang Qu
In this paper, we proposed an in-fiber Mach-Zehnder temperature sensor based on a dual-core fiber (DCF) in which one core, working as the reference arm, is located in the center of fiber and the other core, working as the sensing arm, is suspended in an embedded fluidic channel partially filled with silicone oil. Temperature variations would mainly change the refractive index of the silicone oil and therefore the effective index of the guided modes in the suspended core, while the guided modes in the center core were barely affected. Phase difference between guided modes in the two cores would be accumulated along the DCF, thus shifting the interference spectrum of the sensor. Both experiments and numerical simulations were carried out to characterize the sensor. The spectrum shifts measured experimentally agreed well with the theoretical results. Experimental sensitivity of the DCF sensor filled with 33.5-cm-long silicone oil was found to be as high as −2.18 nm/°C, comparable to that of other interferometric sensors. The proposed sensor could be easily fabricated with good robustness and stability, which makes the sensor promising for applications such as environment and architecture monitoring.
研究领域:
光学传感器
·
光纤光学
·
温度传感
·
干涉测量
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Hua Yu,Fengping Ruan,Leifeng Chen,Degang Deng
Ca 9 Zn 1.5 (PO 4 ) 7 : Eu 2+ /Eu 3+ phosphors had been synthesized via conventional high temperature solid-state reaction. Based on the different thermal quenching characteristics between 4f-5d transition of Eu 2+ ions and 4f-4f transition of Eu 3+ ions, the fluorescence intensity ratio (FIR) of Eu 3+ to Eu 2+ exhibits temperature dependence at the temperature from 293 to 473 K. The maximum absolute and relative temperature sensitivity of Ca 9 Zn 1.5 (PO 4 ) 7 : Eu phosphor can reach up to 0.0034 K −1 and 1.4% K −1 at 453 K, respectively, when used as thermometric material. These results indicated that our study opens up an effective approach for developing other high-performance self-calibrated optical thermometers.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
测温技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yi Zhang,Zhexuan Gao,Yinyan Li,Huanping Wang,Shilong Zhao,Yang Shen,Degang Deng,Shiqing Xu,Hua Yu
Here, near-infrared broad dual-band emission phosphors were achieved through energy transfer between Cr3+ and Ni2+ ions in the β-Ga2O3 host. All samples co-doped with Cr3+ and Ni2+ exhibit dual-band emission covering 600–1700 nm under 430 nm excitation. Thanks to the doping of Cr3+ ions, the emission intensity of Ga2O3:Cr3+, Ni2+ phosphors has increased by about 2.4 times and the internal quantum efficiency has increased by 83.2% compared to Ga2O3:Ni2+ phosphors. Meanwhile, when the fluorescence lifetime was monitored at 745 nm, an efficient energy transfer between Cr3+ and Ni2+ ions in the β-Ga2O3 host was verified. Due to the significant differences in the emission temperature-sensitive properties of Cr3+ and Ni2+ ions, a thermometer was designed utilizing fluorescence intensity ratio technology, achieving a maximum relative sensitivity of 5.26% K–1, which surpasses most optical temperature measurement phosphors. This suggests that Ga2O3:Cr3+, Ni2+ samples hold promise as potential candidates for optical thermometer materials. Additionally, the broadband near-infrared emission of the Ga2O3:Cr3+, Ni2+ sample has been investigated for potential applications in component analysis and night vision, demonstrating its versatility for multifunctional applications.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
固体物理
·
近红外成像
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ming Wu,Degang Deng,Fengping Ruan,Bowen Chen,Shiqing Xu
Increasing demand for non-contact temperature sensing, in this paper, Li 4 SrCa(SiO 4 ) 2 (LSCS) phosphor doped with Eu 2+ was prepared, and the temperature dependence of its optical properties was studied in detail. The conformation of Eu 2+ double-sites in LSCS host has been veritied by X-ray diffraction (XRD) spectrum, photoluminescence spectra and decay curves. The temperature dependence of emission intensity and decay lifetime of Eu 2+ in the range of 303 K–473 K has been studied systematically. Under the excitation of ultraviolet light (at 363 nm), the color of LSCS: x Eu 2+ ( x = 0.05) phosphor gradually changed from blue-violet (at 303 K) to light yellow (at 473 K) with the increase of temperature. The highest absolute sensitivity ( S a ) of the material is 0.051 K −1 (at 473 K) and the relative sensitivity ( S r ) is 3.18% K −1 (at 423 K) under fluorescence intensity ratio (FIR) detection technology. In addition, the temperature resolution ranges from 0.17 to 0.35 K. Based on fluorescence lifetime thermometry, the maximum of S a is 1.47 K −1 (at 363 K) and S r is 15.0% K −1 (at 573 K), obviously superior to the previously reported inorganic optical thermometry materials. Moreover, LSCS: Eu 2+ has good signal recognition ability because of the different response of the two emission centers to temperature. Therefore, we believe that LSCS: Eu 2+ has a good application prospect in the field of spatial/temporal optical temperature measurement.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
固态物理
·
测温技术
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Haiming Qiu,Yong Yao,Yongkang Dong,Jiajun Tian
Immunosensors capable of ultralow-concentration and single-molecule detection of biomarkers are garnering attention for the early diagnosis of cancer. Herein, a fiber-optic Fabry–Perot interferometer (FPI)–based immunosensor was used for the first time for single-molecule detection of progastrin-releasing peptide (ProGRP). The cascaded FPI structure of the immunosensor introduces a high-order harmonic Vernier effect (HVE). A piece of a side-polished D-shaped hollow-core photonic crystal fiber (HCPCF) was used as a sensing FPI, on which the biomarker was deposited to detect ProGRP. Compared with traditional FPIs with open-cavity structures, this structure provided a larger contact area and improved the sensitivity of the immunosensor. The polished side surface of the D-shaped HCPCF was modified using a gold nanoparticle–graphene oxide (AuNP@GO) nanointerface to enhance refractive index (RI) modulation via antigen–antibody binding and achieve selective energy enhancement of the binding site . The antigen binding changes the RI of the D-shaped HCPCF and the effective RI of the transmitted light in the sensing FPI, thereby changing the spectrum of the immunosensor. Experimental results showed that the high-order HVE and AuNP@GO nanointerface considerably improved the immunosensor sensitivity, exhibiting a liquid RI sensitivity of 583,000 nm/RIU. After functionalization with an anti-ProGRP antibody, the limit of detection of the immunosensor for ProGRP reached 17.1 ag/mL; moreover, the immunosensor could perform detection at the single-molecule level. The proposed novel immunosensor overcomes the sensitivity limitations of optical devices and achieves single-molecule detection of a protein.
研究领域:
光学传感器
·
生物医学工程
·
癌症诊断
·
纳米生物技术
·
即时检测
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2011
·
IF 4.269
Ting Liu,Xiaosheng Xiao,Changxi Yang
Surface-enhanced Raman scattering (SERS) probes based on gold nanoparticles modifying the core of the optical fiber were made by a surfactantless photochemical deposition method. The growth kinetics and shape evolution of gold nanoparticles depending on different experimental conditions were studied. It was found that, under the condition of detectable gold nanoparticle deposition, increasing the concentration of chloroauric acid (HAuCl4) was not conducive to the deposition whereas increasing the concentration of sodium citrate (Na3Ct) would speed up the deposition. By controlling the concentration of the reaction solution and irradiation time, we obtained fused spherical-like, spherical, and flowerlike gold nanoparticles. To test the SERS activity of the probes, the SERS spectra of a rhodamine 6G aqueous solution were recorded in direct detection mode and remote mode. We have also developed a new approach to improving the SERS sensitivity when detecting in remote mode.
研究领域:
纳米技术
·
分析化学
·
光学传感器
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Senpeng Zhang,Bo Dong,Zhuojun Wang,Zongyu Chen,Tianyu Wei,Junxiong Zheng,Pofeng Lin
A relative humidity (RH) sensor based on pentaerythritol tetraacrylate polymer and graphene oxide (PETA/GO) composite film with an optical microcavity is presented. The PETA/GO composite film serves as both an internal reflective surface and a moisture-sensitive film for the optical microcavity, which effectively enhances the interaction between light and ambient humidity changes and improves the sensitivity and response speed of the sensor. The composite film-enabled sensor can be used for high-performance human respiratory monitoring. Experimental results show that the sensor has a humidity sensitivity of −288.2 pm/%RH over an RH range of 14.5%–59.4%, with the response time and recovery time of 1.84 and 1.85 s, respectively. The sensor has the advantages of a compact structure, high sensitivity, good repeatability and stability, and fast response time. Therefore, it has potential applications in the medical, biological, and industrial fields related to RH measurement and monitoring.
研究领域:
光学传感器
·
湿度传感
·
可穿戴医疗设备
·
聚合物纳米复合材料
·
呼吸监测
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Chenwei Xu,Chenxia Li,Degang Deng,Jianxun Lu,Hua Yu,Le Wang,Xufeng Jing,Shiqing Xu,Chunxu Shao
A series of BaAl12O19:Sm2+/SrAl12O19:Sm3+ mixed-phase phosphors were produced in one step using the traditional high-temperature solid-phase process. Because Sm is divalent in BaAl12O19 and trivalent in SrAl12O19, the coexistence of Sm2+ and Sm3+ is realized in the mixed-phase host. Since the temperature sensitivity of Sm2+ and Sm3+ in the solid solution host is significantly different, this makes it possible for the sample to measure temperature based on the fluorescence intensity ratio (FIR). The crystal model, ion emission spectrum, and temperature sensitivity of these phosphors are studied in detail. Under the co-excitation of a 410 nm excitation source, this sample has excellent temperature measurement performance in the range of 313–513 K. Based on the FIR method, the maximum absolute temperature sensitivity (Sa) is 0.55 K–1 at 513 K, and the maximum relative temperature sensitivity (Sr) is 2.47%K–1 at 453 K. Moreover, based on the photoluminescence lifetime temperature measurement mode, the largest value of Sa at 413 K is 0.046 K–1, and the maximum value of Sr at 473 K is 3.10%K–1. In short, the BaAl12O19:Sm2+/SrAl12O19:Sm3+ solid solution is a kind of phosphor with nice temperature measurement ability, and it has very strong potential in the application of noncontact optical thermometers.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
测温技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）