Analytical Methods
·
2025
·
IF 2.6
Xinxing Jiang,Jihong Fu,Shuxian Ren,WenXia Xue
Substrate materials with high sensitivity and good reproducibility are highly desirable for the practical applications of surface-enhanced Raman scattering (SERS) techniques. In this study, a novel Ni-based metal-organic frameworks loaded gold nanoparticles (Ni-BDC-NH2/Au NPs) SERS substrate was successfully synthesized via electrostatic self-assembly method. The enhancement of the SERS signal is achieved owing to the synergy between chemical enhancement (CM) effect of Ni-BDC-NH2 and the electromagnetic enhancement (EM) of Au NPs, and the enriching of the analyte near the SERS “hot spots” through the strong adsorption capacity of the Ni-BDC-NH2. The Ni-BDC-NH2/Au NPs exhibited a high enhancement factor (EF) of 1.10×107 and a low detection limit of 5×10-9 mol/L. Besides, the substrate material showed exceptional stability up to 45 days at room temperature. The Ni-BDC-NH2/Au NPs was used to detect methylene blue (MB) that displayed a wide linearity (5×10-7-5×10-5 mol/L) and high recoveries (86.82-104.46%). These indicate that the Ni-BDC-NH2/Au NPs hybrid substrate has great potential for the detection of environmental pollution in practical applications.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Li Yang,Qixin Chen,Yiheng Yuan,Xishun Peng,Xinghua Li,Cheng Zuo,Zhangyu Zhou,Zhongchen Bai
Detecting γ-aminobutyric acid (GABA) in the mammalian body is vital for diagnosing neurological disorders. Here, we introduced a novel SERS sensor based on metal-semiconductor heterojunction ZnO/Cu@Ag substrate for highly sensitive detecting GABA molecules. The ZnO/Cu@Ag substrate fully leverages the electromagnetic field enhancement effect and the chemical enhancement effect of metal-semiconductors heterojunction, exhibiting an excellent enhancement factor of 2.23 × 10 6 and a low limit-of-detection (LOD) of 3.84 nM for GABA molecules in water. Moreover, the ZnO/Cu@Ag substrate could recognize 10 nM GABA molecules in human serum. This GABA SERS sensor provides a reliable tool and technological support for research and applications in neuroscience and medicine.
研究领域:
神经科学
·
医学
·
材料科学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Xiangyu Jiang,Fenghua Geng,Yongxiang Wang,Jinhua Liu,Peng Qu,Maotian Xu
Quantitative fluorescence turn-on and colorimetric detection of glutathione (GSH) with rapid speed, low cost have attained much attention. Herein, we developed a sensitive fluorescence turn-on and colorimetric sensor for GSH based on the inner-filter effect (IFE), which is the first time to select oxTMB and TMPyP as the IFE absorber and fluorophore pair, respectively. The absorption band of oxTMB matches well with the emission band of TMPyP in the IFE-based fluorescent assay. In the absence of GSH, the absorption peak of oxTMB at 652 nm significantly overlaps with the emission of TMPyP, resulting in the efficient IFE and inhibition of the fluorescence of TMPyP. In the presence of GSH, the absorption intensity at 652 nm decreases, generating the recovery of the fluorescence of TMPyP. Therefore, this approach is demonstrated to be a novel candidate for detection of GSH, with high sensitivity and selectivity. The linear dynamic range for the concentrations of GSH is between 0.1 μM to 20 μM along with a limit of detection (LOD) of about 30 nM (calculated LOD as 3 σ /slope). Finally, this novel sensor was successfully applied for GSH detection in fetal calf serum , and satisfactory recovery was achieved.
研究领域:
分析化学
·
生物传感
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2015
·Vol. 28
·期 1
·63-68
·
IF 2.138
Jiao Wang,Xuerong Chen,Kangbing Wu,Miao Zhang,Wensheng Huang
Graphene nanosheets (GS) were prepared via ultrasonic exfoliation, and used to modify glass carbon electrode (GCE). Compared with GCE, the GS-modified GCE (GS/GCE) greatly increased the anodic stripping peak currents of Cd 2+ and Pb 2+ . Moreover, the response signals of Cd 2+ and Pb 2+ on GS/GCE further enhanced remarkably in the presence of Bi 3+ . Based on the synergistic enhancement effects of GS and Bi 3+ , a novel electrochemical sensor was developed for Cd 2+ and Pb 2+ . The detection limits were 0.35 and 0.045 μg L −1 for Cd 2+ and Pb 2+ . It was used in food sample analysis, and the accuracy was tested by ICP-MS.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 15
·9342-9350
·
IF 4.036
Yuyi Zhang,Wei Zhang,Yajie Bian,Yiting Liu,Xiaolei Zhang,Mengdi Chen,Bingwen Hu,Qingyuan Jin
Zeolitic imidazolate framework-8 (ZIF-8) is one of the most promising metal–organic frameworks because of its excellent high porosity, stability and geometrically well-defined structure. However, the application of ZIF-8 in the field of fluorescent molecular sensing has not been intensively explored. Our work demonstrates the versatility of ZIF-8 as a carrier material, which can be used for small molecule [2-(2-hydroxyphenyl)-1H-benzimidazole (HPBI)] capture and fluorescence enhancement. ZIF-8 displays luminescent behavior changes when combined with HPBI, as the emission peaks of ZIF-8 and HPBI are located in the same range for resonance enhancement of fluorescence. The results of the experiment indicate that the fluorescence enhancement effect will change in the presence of different concentrations of HPBI. We propose that the pore structure of ZIF-8 could provide an opportunity for the adsorption of HPBI molecules, and eventually the adsorption would saturate. The high porosity of ZIF-8 provides the path to HPBI aggregation or entrance into the ZIF-8 internal structure. Our results suggest that ZIF-8 may offer great promise for molecular fluorescence sensing.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Luyu Wang,Yunling Wu,Junkuo Gao,Jia Song
Solid AlPO-5 and La doped AlPO-5 (La/AlPO-5) were synthesized by a hydrothermal treatment followed by crystallization and calcination . The ammonia (NH 3 ) sensing properties of AlPO-5 and La/AlPO-5 were evaluated by using quartz crystal microbalance (QCM) platform to work out the enhanced effect of La doping treatment. La/AlPO-5 possessed a higher response to NH 3 than that of AlPO-5 with same concentration. In addition to the favorable sensitivity, La/AlPO-5 based sensor also showed prominent repeatability and selectivity. We also explored the thermodynamics and humidity-enhanced effect in the NH 3 sensing process.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2022
·Vol. 19
·期 6
·3358-3366
·
IF 2.328
Hongqiang Cui,Yongze Cao,Ying Li,Lei Li,Yuhang Zhang,Guojian Li,Yichao Wang,Xiangping Li,Baojiu Chen
A series of Sr 2.99-x (PO 4 ) 2 :.01Er 3+ /xYb 3+ ( x = .02, .04, .06, .08, .10) phosphors in the presence of impurity Tm 3+ were synthesized by high temperature solid-state method, and X-ray diffraction results show that these samples are pure R-3 m(166) space group phase. The upconversion luminescence (UCL) of Er 3+ and impurity Tm 3+ under 980-nm laser excitation were investigated, and the results show that the intense blue UCL of impurity Tm 3+ and thermal enhancement of 2 H 11/2 → 4 I 15/2 of Er 3+ simultaneously exist. When Er 3+ doping concentration is kept at .01, both the blue UCL intensity of impurity Tm 3+ and green and red UCL intensity of Er 3+ reach the maximum at Yb 3+ doping concentration of .08. The thermal enhancement effect of 2 H 11/2 → 4 I 15/2 of Er 3+ was observed as high as 3.27 times from 303 to 723 K, which is because of lattice distortion and phonon-assisted transition. In addition, the optical temperature performance of Sr 2.91 (PO 4 ) 2 :.01Er 3+ /.08Yb 3+ sample was studied, and the maximum absolute temperature sensitivity was calculated as .00623 K −1 at 538 K. This study suggests that Sr 3 (PO 4 ) 2 :Er 3+ /Yb 3+ phosphors in the presence of impurity Tm 3+ have a promising application prospect as optical temperature sensor at high temperature.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2022
·
IF 9.336
Kunpeng Su,Jianhua Wu,Dingkang Xia,Xinming Zhang
Although there has been extensive research on the factors that influence sonochemical reactions in solid particle suspensions, the role that solid particles play in the process remains unclear. Herein, the effect of monodisperse silica particles (10–100 μm, 0.05–10 vol%) on the sonochemical activity (20 kHz) was investigated using triiodide formation monitoring and luminol tests. The results demonstrate that, in the particle size range considered, the sonochemical yields were enhanced in dilute suspensions (0.05–1 vol%), while further particle addition in semi-dilute suspensions (1–10 vol%) decreased the yields. Two regimes, namely the site-increasing regime and sound-damping regime, are identified in respect of the enhancing and inhibiting effects of the particles, respectively, and their dependence on particle characteristics is analyzed. Both regimes are confirmed based on the cavitation erosion test results or cavitation noise analysis. The clarification of the two regimes provides a better understanding of the dominant factors controlling sonochemistry in the presence of solid particles, as well as a guide for sonochemical efficiency prediction.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 32
·12352-12361
·
IF 4.569
Hongqiang Cui,Yongze Cao,Yuhang Zhang,Lei Li,Guojian Li,Sai Xu,Yichao Wang,Jinsu Zhang,Baojiu Chen
A series of Er3+/Yb3+ co-doped Cs3BiSr(P2O7)2 (CBSPO) phosphors with significant thermal enhancement were successfully prepared using the solid-state method and the thermal-enhancing effect was studied in detail. When the temperature increased from 303 to 723 K, the upconversion luminescence (UCL) emission intensities of 2H11/2 → 4I15/2 and 2H11/2 + 4S3/2 → 4I15/2 of Er3+ in CBSPO:0.1Er3+/0.2Yb3+ were enhanced 22.81 and 10.06 times under 980 nm laser excitation, respectively. Meanwhile, the UCL color of the sample obviously changed from orange to green with the increase in temperature. Furthermore, the UCL thermal enhancement mechanism was demonstrated, which originates from phonon-assisted transitions. In addition, the maximum absolute temperature sensitivity for CBSPO:0.1Er3+/0.2Yb3+ was calculated to be 0.01026 K−1 at 563 K via luminescence intensity ratio (LIR) technology. All the results show that the CBSPO:Er3+/Yb3+ phosphors can be used for safety warning and temperature measurement at high temperatures.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xiao-Feng Li,Jingyu Wang,Yu-Ting Wu,Yadong Zhou,Qiang-Qiang Zhu,Peiqing Cai,An Wang,Yan Shi,Le Wang,Shangzhong Jin,Fan-Li Zhang,Jian-Feng Li
Rare earth ion luminescent materials have attracted extensive attention due to their wide applications in biochemical sensing and bioimaging. However, the low quantum yield and weak luminescence intensity have restricted their further development. Realizing the modulation of rare-earth ions’ emission behavior has become a hot topic in the interdisciplinary fields of materials and chemometrics. Herein, the regulation of the electron decay process and emission of photon signals of rare earth ion (Eu3+) has been achieved in a well-defined plasmonic nanocavity. This nanocavity consists of Ag shell-isolated nanoparticles (SHINs) and an ultraflat Au film, which are separated by a polymer dielectric spacer and CaF2:Eu3+ nanoparticles. Contrary to the intrinsic photoluminescence of CaF2:Eu3+, a factor of 408 increase in the spontaneous emission rate and simultaneously an 800-fold enhancement in the emission intensity have been realized in nanocavities via comprehensive spectroscopic analysis. Additionally, the evolution law between the plasmon resonances and the luminescent enhancement as well as the emission spectrum of Eu3+ indicates a highly effective modulation of emission behavior by plasmons. This presents a novel strategy for enhancing the performance of optical micro- and nanodevices based on rare-earth ion materials, demonstrating significant potential in applications such as bioimaging and surface detection analysis.
研究领域:
材料科学
·
光谱学
·
化学计量学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 32
·1902533
·
IF 15.621
Lingling Li,Ziyi Zhang,Ying Chen,Qin Xu,Jian-Rong Zhang,Zixuan Chen,Yun Chen,Jun-Jie Zhu
Lead halide perovskite quantum dots (QDs) are promising electrochemiluminescence (ECL) nanoemitters due to their fascinating photophysical properties. However, due to their poor structural stability against the external environment, the trade-off between their colloidal stability and carrier injection/transport efficiency is a major challenge in the advancement of perovskite-based ECL technology. In this work, intense and stable ECL from CsPbBr 3 (CPB) QDs is achieved by simultaneously encapsulating CPB QDs and coreactant (CoR) into in situ generated SiO 2 matrix via hydrolysis of tetramethyl orthosilicate. The well-designed architecture of the as-obtained CPB-CoR@SiO 2 nanocomposites (NCs) guarantees not only greatly improved stability thanks to the peripheral SiO 2 protecting matrix, but also efficient self-enhanced ECL between CPB and the intra-coreactants. Consequently, by elaborately selecting the CoR molecules with different tertiary/secondary amines and functional groups, multifold higher (up to 10.2 times) ECL efficiencies are obtained for the CPB-CoR@SiO 2 NCs alone in reference to the standard Ru(bpy) 3 2+ /tri- n -propylamine system. This work provides an efficient design strategy for obtaining stable and highly efficient ECL from perovskite QDs, and offers a new perspective for the development and application of perovskite-based ECL system.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 3
·2307503
·
IF 19
Zhe Yu,Yanghuan Mao,Zhixin Wu,Fenglong Li,Jinwei Cao,Ya-Nan Zheng,Xiaolong Zhong,Lebin Wang,Jin Zhu,Pingqi Gao,Wu Bin Ying,Gang Liu
In the pursuit of tactile sensation resembling human skin, the electronic skin (E-skin) has long been a subject of interest and inspires the exploration of various biomimetic structures. Nevertheless, the exceptional functionality of living organisms arises from the synergistic interplay of multiple internal factors, i.e. the coupling enhancement effect, which has received limited attention in existing studies. Here, a tactile E-skin featuring a multicoupled biomimetic structure that mimics three coupling elements found in the skin: Stratum spinosum, Meissner corpuscle, and Piezo2 protein, is proposed. By amalgamating their distinguishing characteristics, this bionic E-skin surpasses the performance of conventional counterparts such as sensitivity as high as 388.5 kPa −1 , hysteresis as low as 0.76%, and response times as short as 10 ms. Furthermore, its fabrication methodology of efficient 3D printing shows great advantages in terms of production cost and customization. Finally, the sensor is expanded to a 9 × 9 pixels array for a machine learning-assisted intellisense system to recognize the fruits as a human does, achieving an accuracy of 91.4%. All of these prove the promising potential of this multicoupled biomimetic structure in wearable electronics, human–machine interface, soft robotics, and artificial sensing.
研究领域:
生物医学工程
·
材料科学
·
人工智能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）