SENSORS
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2025
·Vol. 25
·期 11
·3470
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IF 3.5
Xiaonan Geng,Lixin Zhang,Duan Xiong,Zhen Su,Qingqing Guan
The detection of zinc ions plays an essential role in protecting public health and maintaining ecological balance. However, traditional fluorescent probes for Zn2+are limited in their specificity, especially under complex environments, due to their single-mode optical signal and inadequate recognization capacities. Herein we report a dual-mode supramolecular sensing system constructed from a unique three-component assembly involving a terpyridine platinum (II) complex, oxalate, and Zn2+, enabling highly specific detection performance for Zn2+. The supramolecular sensing system exhibits excellent selectivity among various interfering substances, accompanied by ultra-low detection limit (0.199 μM) and fast response (<3 s). The high recognization capacity comes from tri-component-based supramolecular assembly, while the dual-mode response arises from the generation of intermelcular Pt-Pt and π-π interactions, which yields absorption and emission originating from low-energy metal–metal-to-ligand charge transfer (MMLCT) transitions. This work marks a pioneering demonstration for highly specific detection of Zn2+and inspires an alternative strategy for designing cation probes.
研究领域:
分析化学
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超分子化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Huimin Yang,Xiaoming Mo,Wangbing Xiong,Kailian Dong,Yulu Zhou,Xiaoma Tao,Yifang Ouyang,Jialong Zhao,Guojia Fang
Ultraviolet photodetectors (UV PDs) based on microcrystals (MCs) have attracted extensive attention due to their outstanding detection performance. Nevertheless, precise manipulation of the MCs still remains challenging, which may hinder the mass processing and performance improvement of the UV PDs. In this work, a single high-quality Cs3Cu2I5 MC that had a special X-shaped morphology was demonstrated to be successfully manipulated to prepare high-performance UV PDs by virtue of optical focusing, probe micromanipulation, and direct-write photolithography techniques. The UV PDs, prepared on the counter limbs and adjacent limbs of the single X-shaped Cs3Cu2I5 MC, exhibited distinctly different dual-mode photoresponse under 254 nm UVC and 310 nm UVB irradiations. At light intensity as low as 2.59 μW/cm2, the counter electrode and adjacent electrode UV PDs showed quite a high responsivity of up to 3376 A/W, a specific detectivity of up to 2.37 × 1014 Jones, and an on/off ratio of up to 1.79 × 102 at a bias voltage of 5 V. Besides, even after 28,800 s (8 h) of continuous operation under dual-mode UV irradiations at 254 and 310 nm, the unpackaged device showed extraordinary stability in the photocurrents in ambient air. Our findings provide inspiration for preparing high-performance dual-mode UV PDs based on the microscale perovskite-inspired copper halides or other semiconductor MCs.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hong Zhu,Jian Li,Jun-Hu Cheng
This study utilized 1,2,4-triaminobenzene dihydrochloride and NaOH as precursors to prepare the pH optical sensor based on carbon dots (CDs). By incorporating CDs into pineapple peel cellulose nanofibrils (CNF) matrix, an intelligent label (CNF/CDs label) with colorimetric and fluorescent dual responsiveness was created for real-time monitoring of food freshness. The CNF/CDs labels exhibited remarkable sensitivity and recognizability towards pH changes from 1 to 12. They also demonstrated excellent reversibility during acid-alkali cycling. Moreover, these labels exhibited exceptional responsiveness to the alkaline and acidic gas environments formed by ammonium hydroxide and acetic acid solutions, respectively. These responses were visually distinguishable through visible color changes and ultraviolet (UV) fluorescence alterations. Encouragingly, the developed labels were successfully applied to monitor the freshness of prawns and fruits, enabling timely assessment of food freshness levels. The dual-mode response of color and fluorescence provided double assurance for the accuracy of the results.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Xiaoyu Du,Gan Wu,Xilin Dou,Zhaoyang Ding,Jing Xie
Food prone to spoilage has a huge food safety hazard, threatening people’s health, so early detection of food spoilage is a continuous and urgent need. Herein, we developed a dual-mode response sensor, alizarin complexone@UiO-66-NH 2 , which can accurately detect pH. The sensor demonstrated significant changes in color from pale yellow to deep pink, while the fluorescence shifted from light blue to blue violet. Moreover, both UV absorption and fluorescence intensity showed a linear correlation with pH raging from 4.5 to 7.5. These results indicate that the sensor effectively responds to pH, making it suitable for detecting the freshness of perishable food. To put this into practice, we integrated the sensor with cellulose-based filter paper to determine the freshness of shrimp and beef, which was proved to be effective in assessing freshness. In the future, it can be combined with intelligent colorimetric and fluorescence instruments to achieve visual detection.
研究领域:
食品科学
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化学传感
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xueting Fu,Yongquan Cao,Xinyue Song,Renbing Sun,Hai Jiang,Peng Du,Dengfeng Peng,Laihui Luo
Flexible piezoelectric energy harvesters (FPEHs) have wide applications in mechanical energy harvesting, portable device driving, and piezoelectric sensors. However, the poor output performance of piezoelectric energy harvesters and the intrinsic shortcoming of piezoelectric sensors that can only detect dynamic pressure limit their further applications. BaTiO 3 (BT) and PVDF are deposited on the glass fiber electronic cloth (GFEC) by impregnation and spin-coating methods, respectively, to form BT-GFEC/PVDF piezoelectric composite films. A mixed solution of mechanoluminescence (ML) particles ZnS:Cu and PDMS are used as the encapsulation layer to construct a high-performance ML-FPEH with self-powered electrical and optical dual-mode response characteristics. Due to the interconnection structure of the piezoelectric films, the prepared ML-FPEH illustrates a high effective energy harvesting performance (≈58 V, ≈43.56 µW cm −2 ). It can also effectively harvest mechanical energy from human activities. More importantly, ML-FPEH can sense stress distribution of hand-writing via ML to achieve stress visualization, making up for the shortcomings of piezoelectric sensors. This work provides a new strategy for endowing FPEH with dual-mode sensing and energy harvesting.
研究领域:
材料科学
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能源技术
·
传感器技术
✓ 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）