CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiangpeng Geng,Wen Zhang,Dekai Guan,Yaxin Liu,Bin Ma
In this research, SrWO 4 substrates co-doped with Eu 3+ and Er 3+ were employed to fabricate phosphors with a homogeneous distribution of Eu and Er. The optimal doping concentrations of Eu 3+ and Er 3+ (3% and 4%, respectively) were determined experimentally, and the luminescence mechanism of the phosphor was thoroughly investigated. The concentration quenching mechanism was also analyzed, and thermal stability tests were performed. The experimental results indicate that, due to the thermal quenching effect, the luminescence intensities of both Eu 3+ and Er 3+ ions gradually decrease with increasing temperature. Based on the experimental findings and numerical calculations, the quenching activation energy was determined. The absolute sensitivity ( S a , 0.417% K −1 and 1.132% K −1 ) and relative sensitivity ( S r , 4.236% K −1 and 1.401% K −1 ) of the phosphors were obtained through simulations, and these values are greater than those reported in previous studies. The phosphors were then mixed with ink, and the obtained mixture was printed to produce a pattern, the colors of which became visible under different excitation light sources. The configuration displays a variety of colors at different temperatures, demonstrates effective applicability for anti-counterfeiting purposes, and exhibits multi-mode anti-counterfeiting functionality. These features indicate that the proposed phosphors meet the requirements of advanced anti-counterfeiting technologies.
研究领域:
材料科学
·
光学材料
·
固体物理
·
应用物理
·
安全技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Dunpu Zhang,Zhen Yue,Zhengyang Liu
Currently, FIR-based luminescent nanothermometry has aroused wide concern for its promising applications in fast-moving objects, harsh environments and microscopic temperature. Synchronously promoting the absolute and relative sensitivities of optical thermometers is one of the significant issues at present. In this work, a new nanothermometry strategy to possess both high absolute and relative sensitivities have been proposed by coupling of thermally-coupled-levels-based technique with non-thermally-coupled-levels method in the core-shell designed nanomaterials . Following this strategy, the core-shell-structured NaGdF 4 :Yb,Er@ NaYF 4 :Ce,Tb,Eu nanocrystals have been successfully prepared. Remarkably, the adverse cross-relaxation among different activators is extremely suppressed owing to the spatial separation of Er 3+ and Eu 3+ ,Tb 3+ activators, being conducive to the realization of both intense green upconverting emissions and yellow downshifting luminescence. Moreover, the temperature-sensitive dual-mode luminescent behaviors of core-shell nanomaterials are systematically studied to probe the possible application in FIR-related luminescent thermometry. Specially, the thermally-coupled-levels-based FIR of Er 3+ : 2 H 11/2 → 4 I 15/2 transition to Er 3+ : 4 S 3/2 → 4 I 15/2 one and non-thermally-coupled-levels-based FIR of Eu 3+ : 5 D 0 → 7 F 2 transition to Tb 3+ : 5 D 4 → 7 F 6 one are proved to be applicable as temperature probes, leading to the achievement of dual-mode temperature sensing. Using the pre-designed core@shell nanoarchitectures, the absolute sensitivity can reach up to 1.02% K −1 based on Eu 3+ ,Tb 3+ Stokes emissions and the relative sensitivity could reach as high as 1.12% K −1 based on Er 3+ anti-Stokes luminescence. We believe that this study provides a valid approach for developing high-performance optical nanothermometers.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jiaomei Wang,Hang Lin,Yao Cheng,Xiangshui Cui,Yan Gao,Zeliang Ji,Ju Xu,Yuansheng Wang
Conventional upconversion thermometry strategy, based on the thermally coupled levels (TCL) of lanthanide ions, confronts a dilemma in simultaneously achieving high absolute/relative temperature ( T ) sensitivities ( S a and S r ) and good signal discriminability. Herein, a novel thermometry strategy by utilizing the synergistic effect of dual-wavelength lasers to manipulate electron thermal distribution is proposed to go beyond the limitation of the TCL-based strategy. In the case of NaGdF 4 : 20%Yb 3+ , 2%Er 3+ nanoparticles upon 980 & 1530 nm dual-excitation, it is found that more efficient utilization of excited photons results in a higher electron concentration in ladder-like energy levels of Er 3+ , owing to the diverse pumping routes, which increases transition rate of the T -dependent phonon-assisted cross-relaxation process, and in turn establishes a thermally-sensitive electronic connection between Er 3+ : 2 H 11/2 , 4 S 3/2 and Er 3+ : 4 F 9/2 . Remarkably, not only a highest record value of S a (0.0365 K −1 ) for the Er 3+ doped host materials in the physiological temperature range (303–343 K) is achieved, but also a high S r (1.29% K -1 ) and an excellent signal discriminability (Δλ = 112 nm) are obtained. Combining a much intensified upconversion (UC) signal and a good size/shape homogeneity in nanometer scale, the investigated NaGdF 4 : 20%Yb 3+ , 2%Er 3+ upon dual-wavelength excitation is potentially applicable in the intracellular thermal sensing and imaging. This work exploits an effective way to develop high-performance T -sensors, and the proposed thermometry strategy can be extended to surges of the other lanthanide ions doped systems pumped by multiple-wavelength lasers.
研究领域:
纳米材料学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wei Zhou
This paper focuses on the study of core-shell rare earth NaLuF 4 :Yb,Er@NaLuF 4 :Yb,Tm@NaLuF 4 upconversion nanoparticles (UCNPs) with multispectral emission for applications in the field of ratiometric temperature sensors. This approach lays the foundation for exploring more luminous intensity ratios (LIRs) between different spectra for temperature sensing. Additionally, it facilitates the use of different LIRs for various temperatures, yielding higher sensitivity. Under 980 nm laser excitation, these UCNPs produce multispectral luminescence covering blue, green, red, and infrared luminescence intervals. Within the temperature range of 293–473 K, we measured the luminescence intensity of different emission peaks and observed that the 803 nm peak exhibits an anomalous thermal enhancement effect. The LIR between the luminescence intensities of different emission peaks is fitted using formulas to calculate the absolute sensitivity ( S a ), relative sensitivity ( S r ), uncertainty ( ΔT ), and repeatability ( R ) of the corresponding LIR. Comparisons revealed that LIR(I 803 /I 540 ) demonstrates greater S a compared to the other LIRs. Furthermore, the S r of LIR(I 803 /I 540 ) is higher in the elevated temperature range, whereas LIR(I 522 /I 540 ) shows greater values in the lower temperature range. By combining the advantages of these two LIRs at different temperatures, LIR(I 522 /I 540 ) is utilized at low temperatures and LIR(I 803 /I 540 ) at high temperatures, achieving a combined S r of 0.67–1.06 %K −1 and a combined ΔT of less than 0.045. The R of LIR(I 803 /I 540 ) is tested and found to be greater than 99 % averaged over five cycles. In summary, the NaLuF 4 :Yb,Er@NaLuF 4 :Yb,Tm@NaLuF 4 UCNPs proposed in this paper demonstrate potential applications in the field of temperature sensing.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASERS IN ENGINEERING
·
2020
·
IF 4.273
Hang Song,Qi Wang,Wan-Ming Zhao
In this work, we proposed a novel surface plasmon resonance (SPR) sensitivity-enhancing method by adding MoS 2 nanosheets between gold film and fiber (fiber-MoS 2 -gold film). And we apply it to the detection of human IgG protein. The sensor was fabricated by attaching MoS 2 nanosheets to the U-shaped fiber surface and then covering a layer of gold film. The refractive index sensitivity of 6184.4 nm/RIU was achieved by the fiber-MoS 2 -gold film sensor which is 59 percent higher than the gold film SPR sensor and 25 percent than the fiber-gold film-MoS 2 SPR sensor.The presence of MoS 2 increases the absorption of light energy and excites a stronger SPR phenomenon. At the same time, since the monolayer MoS 2 is a direct bandgap semiconductor, the absorbed light energy promotes the transfer of electrons, generates strong coupling on the gold film surface, enhances the surface electric field, and improves the sensitivity of the sensor. Biofunctionalized sensor detect human IgG with the limit of detection as low as 19.7 ng/mL. This work proposed a novel method for enhancing the sensitivity of SPR sensor, it owns a higher sensitivity and a lower LOD which has broad application prospects in measuring low concentration biological analytes.
研究领域:
光学
·
生物传感
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纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
·
2023
·
IF 5.6
Liangliang Cheng,Wanlu Zheng,Ya-Nan Zhang,Xuegang Li,Yong Zhao
A highly sensitive fiber-optic urea sensor was designed and experimentally demonstrated based on surface plasmon resonance (SPR) effect and metal-organic zeolite framework (MOF), [zeolite imidazole skeleton-8 (ZIF-8)]/urease modification. The SPR effect was excited by plating gold film on the thin core fiber (TCF) in multimode-thin core-multimode fiber (MMF) structure, which behaved high refractive index sensitivity. The ZIF-8/urease composite film was grown on the gold film by rapid aqueous phase synthesis method, in which the ZIF-8 could immobilize more urease and made urease and urea fully contact. Since the urease catalyzed urea hydrolysis would change the refractive index, the measurement of urea concentration was realized with high sensitivity and good selectivity. Experimental results showed that the urea measurement sensitivity of the proposed sensor could reach 6 nm/mM within the concentration range of 1–7 mM, which has great application potential in the field of human health monitoring.
研究领域:
光学传感
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yuzhen Wang,Yanbin Li,Chaoyang Ma,Zicheng Wen,Xuanyi Yuan,Yongge Cao
In this study, NaYTiO 4 : Yb/Tm phosphors with different concentrations of Yb 3+ and Tm 3+ ions were synthesized by conventional solid-state reaction. Upon a 980 nm laser excitation, the up-conversion luminescence properties in a wide temperature range (303–823 K) were investigated. By employing the fluorescence intensity ratio (FIR) techniques based on the robust near-infrared emissions of thermally coupled 3 F 2,3 / 3 H 4 energy levels and 3 H 4(1) / 3 H 4(2) Stark energy levels, the calculated absolute sensitivity (S a ), relative sensitivity (S r ), and temperature uncertainty (δT) values demonstrated good temperature sensing properties. For the 3 F 2,3 / 3 H 4 energy levels, the maximum S r and minimum δT values are 1.04% K −1 and 0.010 K at 463 K, respectively. Moreover, the maximum S a is 0.32 × 10 −3 K −1 at 823 K. In addition, the thermally coupled 3 H 4 Stark energy levels present the maximum S a , S r and the minimum δT are 0.88 × 10 −3 K −1 , 0.60% K −1 and 3.17 K at 303 K, respectively. Besides, due to the ratio of blue to red emission varying with elevated temperature, the NaYTiO 4 : Yb/Tm phosphors are expected to be applied as an intuitive high-temperature indicator.
研究领域:
材料科学
·
光学材料
·
传感器技术
·
固体化学
·
功能材料
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 47
·6053-6061
·
IF 2.378
Man Du,Yue Zhang,Yifeng Yu,Hua Zhao,Yue Guo,Yunxu Yang
A novel “off–on” fluorescent probe ACBT, using a readily available dye 2-(2′-aminophenyl) benzothiazole as the fluorophore, for the determination of Pd2+ was designed and synthesized in this work. Based on a palladium triggered cleavage reaction, the probe ACBT exhibited rapid response time (<2 min), and high selectivity and sensitivity towards Pd2+ in aqueous solution under mild conditions. The detection limit of probe ACBT towards Pd2+ was estimated to be as low as 2.6 nM. Furthermore, fabrication of probe ACBT test strips was achieved for a convenient visual detection of palladium. In addition, it also has been successfully applied to detect Pd2+ in environmental water samples with satisfactory results, indicating that the use of probe ACBT could be a potential and feasible method to detect Pd2+ in environmental systems.
研究领域:
化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Chongqi Zhou,Yang Xu,Xiaonan Zhang,Zhangyan Li,Tian Guan,Yonghong He,Yanhong Ji
A modified weak measurement scheme, rotatory biased weak measurement, is proposed to significantly improve the sensitivity and resolution of the total internal reflection sensor. This method introduces an additional phase in the post-selected procedure and generates an extinction point in the spectrum distribution. The biased post-selection makes smaller coupling strength available, which leads to an enhancement of phase sensitivity and refractive index sensitivity. In rotatory biased weak measurement, an enhanced refractive index sensitivity of 13605 nm/RIU is achieved compared to 1644 nm/RIU in standard weak measurement. The performance of total internal reflection sensors with different sensitivity is analyzed, and it is shown the optimal refractive index resolution of sensors increases with sensitivity. An optimal refractive index resolution of 4 × 1 0 − 7 RIU on a total reflection structure is demonstrated, which is far beyond the state-of-the-art resolution of 3 × 1 0 − 6 RIU of total internal reflection sensors. The rabbit anti-mouse IgG and mouse IgG binding reaction experiments demonstrate that our system has a high response to the concentration of IgG in a wide range and the limit of detection is 15 ng/mL. This work provides a total internal reflection sensor with the advantages of simple structure, low cost, and high resolution at the same time.
研究领域:
光学
·
传感器
·
生物物理学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yansheng Liu,Zhenle Qin,Xiaobo Jia,Jin Zhou,Hongli Li,Xiaohong Wang,Yating Chen,Junpeng Deng,Zhicheng Jin,Guofu Wang
The global pandemic of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a great disaster to the economy and human society. Nowadays, SARS-CoV-2 is fading away from people’s memory but it still exists around us. PCR plays an important role in detecting SARS-CoV-2 but it requires a long detecting time, equipped laboratory, and professional operators. In comparison with polymerase chain reaction (PCR), surface-enhanced Raman scattering (SERS) is a promising method for detecting SARS-CoV-2 due to its fast, easily operated, and high-sensitivity properties. In this study, the monolayer Ag nanoparticles (MAgNPs) covered with single-layer graphene (SLG) are applied as a SERS substrate. The angiotensin converting enzyme 2 (ACE2) is selected as a bio-probes that can specifically bind to the SARS-CoV-2 S protein. The SERS-based biosensor is formed by ACE2 functionalized SLG/MAgNPs and the LODs of detecting SARS-CoV-2 S protein in phosphate-buffered saline (PBS) and in pharyngeal swabs solution (PSS) are 0.1 fg mL −1 and 10 fg mL −1 , respectively. This biosensor provides a way of directly detecting SARS-CoV-2 S protein with high sensitivity and specificity. It illustrates a practical potential in the rapid detection of the SARS-CoV-2 virus.
研究领域:
生物传感器
·
医学检测
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Li Jie,Zhang Fan,Xia Xiaobin,Zhang Kaihang,Wu Jianhui,Liu Yulu,Zhang Chi,Cai Xinyu,Lu Jiaqi,Xu Liangquan,Wan Rui,Hazarika Dinku,Xuan Weipeng,Chen Jinkai,Cao Zhen,Li Yubo,Jin Hao,Dong Shurong,Zhang Shaomin,Ye Zhilu,Yang Minye,Chen Pai-Yen,Luo Jikui
The accurate monitoring of vital physiological parameters, exemplified by heart rate, respiratory rate, and intracranial pressure (ICP), is of paramount importance, particularly for managing severe cranial injuries. Despite the rapid development of implantable ICP sensing systems over the past decades, they still suffer from, for example, wire connection, low sensitivity, poor resolution, and the inability to monitor multiple variables simultaneously. Here, we propose an ultrasensitive multimodal biotelemetric system that amalgamates an iontronic pressure transducer with exceptional point (EP) operation for the monitoring of ICP signals. The proposed system can exhibit extraordinary performance regarding the detection of minuscule ICP fluctuation, demonstrated by the sensitivity of 115.95 kHz/mmHg and the sensing resolution down to 0.003 mmHg. Our system excels not only in the accurate quantification of ICP levels but also in distinguishing respiration and cardiac activities from ICP signals, thereby achieving the multimodal monitoring of ICP, respiratory, and heart rates within a single system. Our work may provide a pragmatic avenue for the real-time wireless monitoring of ICP and thus hold great potential to be extended to the monitoring of other vital physiological indicators.
研究领域:
生物医学工程
·
神经科学
·
传感技术
·
医疗器械
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Guiping Liao,Jin Luo,Tengfei Cui,Jie Zou,Mian Xu,Yuhan Ma,Lingsheng Shi,Jia Jia,Chen Ma,Hui Li,Fujian Xu
Herein, a label-free, sensitive, and selective fluorescence method for the detection of trace selenite (Se(IV)) in water sample by carbon dots (CDs) was reported. The fluorescence CDs probe was simply and rapidly synthesized within 4 min by microwave-assisted pyrolysis of citric acid and 3,3′-diaminobenzidine (DAB), with a relatively uniform size of approximately 2.6 nm. The fluorescence emission of as-prepared CDs was 450 nm upon the excitation of 400 nm with a quantum yield of about 8% against quinine sulfate as reference standard, which can be quenched by the addition of selenite. Benefit from the strong surface chelating reaction between DAB and Se(IV), the proposed sensor owned the advantage of high sensitivity (limit of detection = 0.5 ng/mL), wide linear range (1–100 ng/mL range, relative standard deviation: 3.8%), and excellent selectivity in the presence of various ions, even other forms of selenium, including selenate (Se(VI)), Selenomethionine (SeMet), and L-Selenocystine (SeCys) etc. Preliminary study on fluorescence quenching mechanism studied. The sensor was successfully exemplified for real water samples and exhibits comparative performance.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）