Foods
·
2023
·Vol. 12
·期 5
·1085
·
IF 5.2
Ziwen Zhang,Ran Han,Sixuan Chen,Feilin Zheng,Xinmiao Ma,Mingfei Pan,Shuo Wang
In this study, a rapid fluorescent and colorimetric dual-mode detection strategy for Hg2+in seafoods was developed based on the cyclic binding of the organic fluorescent dye rhodamine 6G hydrazide (R6GH) to Hg2+. The luminescence properties of the fluorescent R6GH probe in different systems were investigated in detail. Based on the UV and fluorescence spectra, it was determined that the R6GH has good fluorescence intensity in acetonitrile and good selective recognition of Hg2+. Under optimal conditions, the R6GH fluorescent probe showed a good linear response to Hg2+(R2= 0.9888) in the range of 0–5 μM with a low detection limit of 2.5 × 10−2μM (S/N = 3). A paper-based sensing strategy based on fluorescence and colorimetric analysis was developed for the visualization and semiquantitative analysis of Hg2+in seafoods. The LAB values of the paper-based sensor impregnated with the R6GH probe solution showed good linearity (R2= 0.9875) with Hg2+concentration in the range of 0–50 μM, which means that the sensing paper can be combined with smart devices to provide reliable and efficient Hg2+detection.Keywords:Hg2+;R6GH;dual mode;fluorescence;visualization
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2014
·
IF 4.287
ChengCai Zeng,XiaoNi Shi,Bo Wu,Dong Zhang,WeiLu Zhang
A type of novel macromolecular colloid was prepared from gadolinium-based poly( l -succinimide) and gold nanoparticles (GNPs) with Au S covalent bonds. The colloid displayed improved stability in aqueous media and regular arrays in partial region. Moreover, these materials enhanced the contrast 9 times more than that of the corresponding uncoated Au compound when the Au mass content was only 0.15%. Therefore, these materials might have potential as dual-modality contrast agents for magnetic resonance imaging (MRI) and computed tomography (CT).
研究领域:
医学影像学
·
纳米医学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 38
·5611-5617
·
IF 1.9
Guoliang Liu,Chenglei Xuan,Da-Qian Feng,Dongliang Hua,Tianhao Liu,Gang Qi,Wei Wang
A facile fluorometric and light-scattering dual-modal nanosensor for silver(I) ions detection was established based on target-responsive aggregation of carbon dots/cysteine system. The synthesized water-soluble fluorescent carbon dots (CDs) by the one-pot hydrothermal method exhibited emissions peak at 441 nm under excitation at 352 nm. CDs fluorescence was quenched by Ag+via electron transfer, while the light-scattering intensity of CDs was significantly enhanced, providing a dual-modal means of analyte Ag+ detection. The relative fluorescence intensity is directly proportional to the concentration of Ag+ between 0.1 μM and 265 μM, and the detection limit is 50 nM. Moreover, the relative light-scattering intensity is proportional to the concentration of Ag+ from 10 to 4000 nM with the detection limit 2 nM. Common compounds including different types of metal ions had no significant interference in the detection mode. The new nanosensor was simple, rapid and sensitive and was applied to the detection of Ag+ in real water samples with satisfactory results. Moreover, the present CDs-based dual-modal sensor provided a promising platform for environmental sensing applications.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Yibo Chen,Jin He,Xinguo Zhang,Mingcong Rong,Zhiguo Xia,Jing Wang,Zhao-Qing Liu
There is a challenge for noncontact temperature-sensing techniques and the related materials, in which a highly reliable contactless thermometer probe with low cost and high sensitivity is in demand. Here, the Lu3Al5O12:Ce3+/Mn4+ phosphor has been designed and prepared for the high-performance fluorescence temperature-sensing application in a novel one-pot, self-redox, solid-state process. Benefiting from the different electron–lattice/phonon interactions of Ce3+ and Mn4+, two distinguishable emission peaks with significantly different temperature responses originating from Ce3+ and Mn4+ are realized. Applying the fluorescence intensity ratio of Mn4+ versus Ce3+ and the decay lifetime of Mn4+ emission as the temperature readout, a dual-mode optical temperature-sensing mechanism was proposed and studied in the temperature range of 100–350 K. The maximum relative sensitivities (Sr) are derived as 4.37 and 3.22% K–1 respectively, as well as a large chromaticity shift visible to naked eyes (ΔE = 153 × 10–3 in 100–350 K) is observed. This is the first report of a Ce3+,Mn4+ co-doped dual-emitting phosphor, and its unique optical thermometric features demonstrate the high potential of Lu3Al5O12:Ce3+/Mn4+ as an accurate and reliable thermometer probe candidate.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jiantao Lü,Ting Fan,Jie Liang,Yayun Zhou,Tingting Deng,Ruming Jiang
With the combination of carbon quantum dots (CDs) and rare earth-doped fluorescent materials, multi-mode luminescence can be achieved in fluorescent ink, thereby enhancing its anti-counterfeiting security coefficient. However, the self-quenching process in CDs currently hinders their application in the field of anti-counterfeiting. In this study, we employed simple chemical method to prepare the SiO 2 -encapsulated YVO 4 :Eu 3+ /CDs nanocomposites, which greatly improved the stability of the composite and achieved dual-mode solid-state luminescence. Quick response code anti-counterfeiting patterns were fabricated using screen printing technology, and dual-mode luminescence performance with red and blue emission was achieved under excitation at 254 nm and 365 nm respectively. The YVO 4 :Eu 3+ @SiO 2 @CDs nanocomposites showed stable dual-mode luminescent performance in both solid-state and solvent environment, demonstrating great potential in anticounterfeiting and information protection application.
研究领域:
材料科学
·
光学
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 8
·期 2
·1901209
·
IF 7.125
Xiao Chen,Weijing Yao,Qi Wang,Wei Wu
Owing to the large coding capacity and high confidentiality, dual-mode or multimode anticounterfeiting fluorescent materials are gradually substituting traditional single-mode fluorescent materials. Herein, a facile hydrothermal method is designed and used to integrate lanthanide ion (Ln 3+ )-doped NaLuF 4 nanoparticles with Y 2 O 3 -based downconversion nanorods, achieving the construction of dual-mode luminescent composite materials. The excellent optical properties of NaLuF 4 /Y 2 O 3 composites are confirmed by photoluminescence spectroscopy. The composites can be excited by a 980 nm laser to generate bright red, green, and blue colors (corresponding to Er 3+ /Tm 3+ -, Yb 3+ /Ho 3+ -, and Yb 3+ /Tm 3+ -doped NaLuF 4 , respectively), and turn into dim-red and green colors under an excitation source of 254 nm. Furthermore, the polyvinyl alcohol (PVA)-mediated stable fluorescent inks are successfully formulated and then printed onto the paper, aluminum foil, and fabric by low-cost and simple screen printing techniques to fabricate various anticounterfeiting patterns. Interestingly, the printed patterns are hard to observe under ambient light, enabling the generation of multiple emission color under excitations of 980 and 254 nm. The prepared dual-mode NaLuF 4 /Y 2 O 3 composite materials with outstanding stability and distinctive multicolor luminescent properties provide low-cost, highly effective, multilevel protection for genuine products against counterfeit.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Weidong Qin,Hongyuan Tian,Zhao Meng,Zhanqiu Tang,Junhua Wang,Zhenglong Wu
We synthesized excitation-dependent fluorescent carbon dots (CDs) through a one-pot hydrothermal process using mango pulps as precursors and discovered that the ozone-treated CDs (O 3 -CDs) could stabilize the diimine form of oxidized 3,3′,5,5′-tetramethylbenzidine (diimine oxTMB). A dual-mode colorimetry and ratiometric fluorescence method using O 3 -CDs and TMB as probes was developed for detecting sarcosine. During measurement, sarcosine was selectively oxidized by sarcosine oxidase, and the resulting hydrogen peroxide was catalyzed by horseradish peroxidase to convert TMB into a blue-colored oxidized product. Under acidic conditions, this product was further oxidized to diimine oxTMB, which exhibited an absorbance band at 450 nm. Due to the inner filter effect, the fluorescence emission of O 3 -CDs at 450 nm was significantly quenched by the diimine oxTMB, while the emission at 550 nm was utilized as a reference signal. The dual-mode method selectively detected sarcosine, with detection limits of 0.034 µM and 0.096 µM for colorimetry and ratiometric fluorescence detection, respectively. The ratiometric fluorescence sensing strategy provided a built-in correction to prevent errors originating from environmental variabilities. Moreover, the stabilization of diimine oxTMB mediated by O 3 -CDs improved the detection performance of the method. This study enriches the library of luminescent CDs through the rational utilization of natural biomass and introduces a novel approach to improve the analytical performance of dual-mode detection.
研究领域:
分析化学
·
生物传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Jiyuan Yu,Jian Zheng,Wei Wang,Zhijia Zhu,Chunyan Hu,Baojiang Liu
Nowadays, the global climate is constantly being destroyed and the fluctuations in ambient temperature are becoming more frequent. However, conventional single-mode thermal management strategies (heating or cooling) failed to resolve such dynamic temperature changes. Moreover, developing thermal management devices capable of accommodating these temperature variations while remaining simple to fabricate and durable has remained a formidable obstacle. To address these bottlenecks, we design and successfully fabricate a novel dual-mode hierarchical (DMH) composite film featuring a micro-nanofiber network structure, achieved through a straightforward two-step continuous electrospinning process. In cooling mode, it presents a high solar reflectivity of up to 97.7% and an excellent atmospheric transparent window (ATW) infrared emissivity of up to 98.9%. Noted that this DMH film could realize a cooling of 8.1 °C compared to the ambient temperature outdoors. In heating mode, it also exhibits a high solar absorptivity of 94.7% and heats up to 11.9 °C higher than black cotton fabric when utilized by individuals. In practical application scenarios, a seamless transition between efficient cooling and heating is achieved by simply flipping the film. More importantly, the DMH film combining the benefits of composites demonstrates portability, durability, and easy-cleaning, promising to achieve large-scale production and use of thermally managed textiles in the future. The energy savings offered by film applications provide a viable solution for the early realization of carbon neutrality.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-12
·
IF 5.3
Shen Hao,Tang Yan,Ma Hongmei
The high-residual and bioaccumulation property of organophosphorus pesticides (OPs) creates enormous risks towards the ecological environment and human health, promoting the research for smart adsorbents and detection methods. Herein, 2D hemin-bridged MOF nanozyme (2D-ZHM) was fabricated and applied to the efficient removal and ultrasensitive dual-mode aptasensing of OPs. On the one hand, the prepared 2D-ZHM contained Zr-OH groups with high affinity for phosphate groups, endowing it with selective recognition and high adsorption capacity for OPs (285.7 mg g −1 for glyphosate). On the other hand, the enhanced peroxidase-mimicking biocatalytic property of 2D-ZHM allowed rapid H 2 O 2 -directed transformation of 3,3′,5,5′-tetramethylbenzidine to oxidic product, producing detectable colorimetric or photothermal signals. Using aptamers of specific recognition capacity, the rapid quantification of two typical OPs, glyphosate and omethoate, was realized with remarkable sensitivity and selectivity. The limit of detections (LODs) of glyphosate were 0.004 nM and 0.02 nM for colorimetric and photothermal methods, respectively, and the LODs of omethoate were 0.005 nM and 0.04 nM for colorimetric and photothermal methods, respectively. The constructed dual-mode aptasensing platform exhibited outstanding performance for monitoring OPs in water and fruit samples. This work provides a novel pathway to develop MOF-based artificial peroxidase and integrated platform for pollutant removal and multi-mode aptasensing. Graphical Abstract
研究领域:
环境科学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shenghong Yang,Ke Wang,Xin Wang,Xiaohan Sun
In-depth research on surface functionalization of carbon dots (CDs) has opened new horizons for their application in chemosensing and biosensing. However, the practicability of CDs is still limited due to their unmanageable fluorescence properties. In this study, organic acid was employed to regulate and control the fluorescence performance of CDs. A remarkable enhancement of fluorescence and redshift of the fluorescent band of CDs was observed via organic acids’ participation in the water phase preparation process. Furthermore, a colorimetric and fluorescent dual-readout strategy was constructed for the analysis of copper ions (Cu 2+ ) based on ethylenediaminetetraacetic acid (EDTA)-regulated carbon dots. The proposed sensing system can be used in the fast detection of Cu 2+ via an obvious solution color change from yellow to brown under natural light, and the trace analysis of Cu 2+ can be realized by quenching the green fluorescence band with detection limit of 21 nM. The designed sensor has been employed to the analysis of Cu 2+ in water and urine samples successfully, and cell imaging experiment was performed to evaluate the feasibility of biomedical applications.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Aihua Zhou,Feng Song,Weijing Yao,Yingdong Han,Feifei Song,Wei Wu,Chengguo Ming,Dandan Ju,Adnan Khan
The carbon-dots/NaLuF 4 microcrystals have been synthesized by the hydrothermal method and bright blue emission from carbon dots is observed in aqueous and solid state under 365 nm excitation. Self-quenching property of the carbon-dots/NaLuF 4 microcrystals under solid state was deeply investigated, by changing the ratio of citric acid (CA) and ethylenediamine (DHE). The results indicate that the carbon dots can be effectively adsorbed and dispersed on the surface of NaLuF 4 microcrystals, suppressing the aggregation of carbon dots. Furthermore, the upconversion luminescence can also be realized under 980 nm laser excitation. From the above observations, the carbon-dots/NaLuF 4 microcrystals not only reveal emission property of carbon dots and NaLuF 4 , respectively, but also optimize the property of carbon dots. It provides a promising new strategy to prevent the carbon dots quenching in solid state and the carbon-dots/NaLuF 4 microcrystals may have potential multi-applications in different fields including temperature sensing, solid-state display lighting as well as security inks.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Meng-Xian Liu,Xiao Zhang,Wen-Ye Liu,Hui-Yong Wang,Yong-Liang Yu
Integrating long-lived room-temperature phosphorescence (RTP) into nanozymes to build multifunctional nanozymes can benefit biomedical analysis by expanding sensing modes and developing advanced sensing strategies but it is challenging. Herein, a general strategy for fabricating phosphorescent nanozymes by anchoring Co-N x active centers on SiO 2 nanospheres with carbon dots (CDs) encapsulated inside (CDs@SiO 2 @Co) is developed for dual-mode colorimetric-phosphorescent detection of glutathione (GSH). Specifically, surface Co-N x active centers enhanced O 2 adsorption and activation (O 2 to 1 O 2 ), providing oxidase-like activity to induce the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating a distinct colorimetric signal. The SiO 2 layer inhibited non-radiative transitions of the CDs to promote RTP, and spatially separated Co ions from CDs to prevent RTP quenching caused by Co-CD interactions, resulting in CDs@SiO 2 @Co with long-lived RTP (lifetime: 1.14 s), providing a phosphorescent channel free from autofluorescence interference. Upon introduction of GSH, the color product-oxidized TMB (oxTMB) was reduced, and the quenched RTP caused by the oxTMB internal filter effect was restored. Based on this principle, a sensitive and reliable dual-mode colorimetric-phosphorescent method was developed for detecting GSH in plasma and cells. Furthermore, owing to the tunable optical properties of CDs and the flexibility of substituting metal active centers, this strategy can be extended to construct various phosphorescent nanozymes with adjustable RTP emission wavelengths and diverse enzyme-like activities, advancing the development of nanozymes and bioanalytical platforms.
研究领域:
生物医学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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