ACS Applied Materials & Interfaces
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2024
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IF 8.3
Rong Liu,Yan Gao
Titanium alloys are widely used in marine environments and medical fields due to their excellent corrosion resistance and high specific strength. However, their good biocompatibility can lead to severe biofouling, thereby limiting their effectiveness. To inhibit biofouling on the surface of titanium alloys, this study proposes an antifouling solution, which involves the in situ preparation of Cu-MOF film on titanium alloys by leveraging the antibacterial properties of Cu ions. Here, the dense and stable TiO2 film on the surface of Ti-6Al-4V titanium alloy was removed by alkali-heat treatment; meanwhile, a porous surface structure was simultaneously obtained where OH– ions were retained. In the subsequent step, the retained OH– ions in the pores attracted Cu2+ ions in solution to form Cu(OH)2 in the pores, providing active sites for the formation of Cu-MOFs. Subsequently, Cu(OH)2 reacted with organic ligand (1,3,5-benzenetricarboxylic acid, BTC) at room temperature to form Cu-MOFs in the pores, which then grew quickly to cover the alkali-heat-treated surface within 1 h. The formation mechanism of Cu-MOF film on Ti-6Al-4V was elucidated, which provides a reference for designing and preparing multifunctional MOF film in situ on titanium alloys. The stability of in situ-grown Cu-MOF samples and their inhibitory effects on bacteria and microalgae have also been verified. The results indicate that although the stability of Cu-MOFs is relatively poor, their bactericidal and algicidal effects are extremely significant, suggesting that this material has significant potential for short-term applications that require high antibacterial performance.
研究领域:
材料科学
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生物医学工程
·
海洋科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bing Chang,Fengtao Zhang,Zhaojun Min,Nan Wang,Qingchun Xia,Jing Fan,Maohong Fan,Jianji Wang
Cu-based catalysts, especially co-sites of Cu 0 and Cu Ⅰ , are the best competitors for electrochemical CO 2 fixation to produce multi-carbon (C2 + ) products. However, it is challenging to construct highly stable Cu Ⅰ sites due to the changeability of its valence state and electronic structure in the electroreduction process, and the mechanism is also elusive. Herein, a 2D conductive Cu Ⅱ -MOF film (Cu Ⅱ HHTP@Cu 0 ) is prepared on Cu (1 0 0) foil by in-situ electrochemical assembly. After pre-reduction, the in-situ produced Cu 2 O clusters are confined in the cavities of the film created by the local breaking of the MOF framework to construct a unique Cu Ⅰ -Cu Ⅱ HHTP@Cu 0 catalyst, so that a novel strategy is proposed to stablize highly dispersed Cu Ⅰ sites during electrochemical reduction, thus protecting the Cu 2 O clusters from further reduction and ensuring the coexistence of Cu Ⅰ (1 1 1)-Cu 0 (1 0 0) sites. As such, the current density of CO 2 electrochemical reduction catalyzed by this catalyst exceeds 300 mA cm −2 , the duration overs 50 h, and the C2 selectivity achieves 72.6 %. In-situ spectroscopy and theoretical calculations reveal that the optimized microenvironment of the Cu Ⅰ (1 1 1) sites reduces the energy barrier of *OCCOH coupling, and Cu 0 (1 0 0) sites increase the coverage of *CO, thus boosting the production of C2 products.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Yafeng Jin,Guangri Xu,Xiaobo Li,Jingjing Ma,Li Yang,Yuanchao Li,Huan Zhang,Zhen Zhang,Donghao Yao,Donghao Li
To circumvent the binder’s adverse effect on the performance of electrochemical sensor and improve the analysis efficiency, a binder-free cobalt-doped Ni-MOF (Co/Ni-MOF) film, with honeycomb-like structure, is fast electrodeposited on glassy carbon electrode (GCE) by cathodic reduction. No conductive agent added, the Co/Ni-MOF/GCE can be directly used as a sensor for levofloxacin (LEV) determination. Under the optimal condition, a wider linear range of 0.1 μM–500 μM LEV is obtained with the limit of detection (LOD, 3S/N) being 22 nM and the sensitivity of 2.85 μA μM −1 cm −2 . Further, when being used to analysis of LEV in eye drop and spiked milk, satisfactory recoveries of 94.0%–108.2% are achieved. Particularly, benefiting of the synergistic effect of Co 2+ and Ni 2+ , as well as and the binder-free film, the sensor exhibits an excellent sensitivity and a robust long-term stability. This work develops a facile and efficient strategy to synthesis of Co and Ni based MOF film, and provides them a new way in electrochemistry application.
研究领域:
分析化学
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电化学传感器
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
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2022
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IF 0.847
Rui Zhai,Yindi Zhu,Limei Chang,Zhigang Gu,Jian Zhang
Metal-organic frameworks with chiral feature (chirMOFs) are attracting great attention on circularly polarized luminescence (CPL). However, developing new efficient strategy to achieve or improve CPL properties is an urgent task. Herein, new chiral MOF thin films prepared by liquid-phase epitaxial layer by layer (lbl) growth method (SUR-chirMOF) are composed of D- or L-camphorate (D/Lcam) and aminopyrazine (Pr-NH 2 ) by using liquid phase epitaxial layer by layer (lbl) method. The resulted Zn 2 (D/Lcam) 2 Pr-NH 2 SURchirMOF shows strong chirality and luminescence but weak CPL emission at 390 nm. After lbl modifying a dye molecule FluoresceinIsothiocyanate (FITC), the chiroptical Zn 2 (D/Lcam) 2 Pr-NH-FITC SURchirMOFs with ~7 times CPL signal improvement and ~3 times g lum value amplification are obtained. This work provides a new strategy to develop chiral MOF thin films for CPL improvement using lbl grafting approach.
研究领域:
材料科学
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光学
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化学
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DOI
高影响因子
Small
·
2025
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IF 12.1
Pengwei Tan,Shuyang Shen,Ying Zheng,Yushu Tang,Yuanyuan Luo,Zheng Zhang,Dong Men,Guotao Duan
Electrochemical transistor (ECT) biosensors can achieve ultrahigh sensitivity, while keeping challenges for large biomolecules due to their sizes over the thickness of the electric double layer (EDL) causing a failure of sensing reaction. Here, wafer-level Ni/Fe-metal-organic framework (MOF) films and corresponding ECT biosensors are fabricated for the detection of coronavirus nucleocapsid protein, which realize an ultralow detection limit of 1 fg mL −1 and a wide detection range of 1 fg mL −1 to 100 pg mL −1 . A 3D Debye space, originating from the unique stacking structure of nanosheets and nanoparticles in Ni/Fe-MOF film, is proposed to explain such ultrahigh sensitivity, which ensures the immune-binding and sensing process of the nucleocapsid protein large molecules located in the effective EDL space. Moreover, an appropriate Ni/Fe molar ratio is optimized to enhance the transmission of carriers, thus improving the signal-to-noise ratio and the sensing response. The Ni/Fe-MOF-ECT biosensors will find applications in highly sensitive detection for large biomolecules, and the 3D Debye space may be a design model for constructing other biosensors.
研究领域:
材料科学
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生物传感
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医学检测
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-15
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IF 14.7
Tian Xiaoli,Li Fu,Tang Zhenyuan,Wang Song,Weng Kangkang,Liu Dan,Lu Shaoyong,Liu Wangyu,Fu Zhong,Li Wenjun,Qiu Hengwei,Tu Min,Zhang Hao,Li Jinghong
Metal-organic frameworks (MOFs) with diverse chemistry, structures, and properties have emerged as appealing materials for miniaturized solid-state devices. The incorporation of MOF films in these devices, such as the integrated microelectronics and nanophotonics, requires robust patterning methods. However, existing MOF patterning methods suffer from some combinations of limited material adaptability, compromised patterning resolution and scalability, and degraded properties. Here we report a universal, crosslinking-induced patterning approach for various MOFs, termed as CLIP-MOF. Via resist-free, direct photo- and electron-beam (e-beam) lithography, the ligand crosslinking chemistry leads to drastically reduced solubility of colloidal MOFs, permitting selective removal of unexposed MOF films with developer solvents. This enables scalable, micro-/nanoscale (≈70 nm resolution), and multimaterial patterning of MOFs on large-area, rigid or flexible substrates. Patterned MOF films preserve their crystallinity, porosity, and other properties tailored for targeted applications, such as diffractive gas sensors and electrochromic pixels. The combined features of CLIP-MOF create more possibilities in the system-level integration of MOFs in various electronic, photonic, and biomedical devices.
研究领域:
材料科学
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纳米技术
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微电子
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光子学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
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IF 6.1
Jian Shi,Hongren Wang,Runcheng Liu,Jie Yan,Mingshun Jiang,Yuanze Xu,Zezheng Zhang,Haipeng Si,Sen Wang,Shouzhen Jiang
Metal-organic frameworks (MOFs), known for their high porosity and tunable properties, have attracted significant interest in enhancing the sensitivity and functionality of plasmonic optoelectronic devices. However, their application in surface plasmon resonance (SPR) fiber-optic sensors remains challenging due to difficulties in preparing and transfer of large-area two-dimensional (2D) MOFs. Here, a large-area continuous ultrathin MOF film was successfully fabricated using an interfacial synthesis strategy and seamlessly adhered to tilted fiber Bragg gratings (TFBG). The resulting 2D MOF film not only exhibited excellent optoelectronic properties, thereby enhancing the plasmonic response in the sensing region, but also, due to its exceptionally high specific surface area, facilitated molecular enrichment within the effective sensing region. Subsequently, gold nanoparticles (AuNPs) were uniformly grown in situ on the 2D MOF films, leveraging the localized surface plasmon resonance (LSPR) effect of AuNPs to amplify the sensing signal, which significantly improved the sensor's performance for trace analysis. Concurrently, the AuNPs and the MOF-constructed nanozymes facilitated ultrasensitive glucose detection through a cascade catalytic reaction, obviating the need for additional receptors. The prepared sensor demonstrates excellent detection capabilities for glucose and DNA molecules in complex biological samples, such as serum. It exhibits strong performance in stability, reproducibility, and scalability, and holds potential for transformation in industrial testing applications. This design fully leverages the synergistic effects among diverse materials, enhancing the sensor's detection capabilities and providing valuable insights for the development of next-generation sensors.
研究领域:
材料科学
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纳米技术
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光电子学
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分析化学
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生物传感器
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等离子体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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