INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiong Liu,Lizhi Chen,Ayixianguli Sufu,Fangfei Liu
Stretchable conductive hydrogels have attracted great attention in flexible electronics. Nevertheless, conductive hydrogels would suffer from an inevitable damage during use, significantly reducing the reliability and limiting the practicability. Herein, stretchable and self-healing conductive hydrogels are designed form carboxymethyl cellulose (CMC), polyacrylic acid (PAA), and Fe 3+ , which are applied for monitoring human motions and electrophysiological signals. The plentiful H-bonding and metal coordination endow the conductive hydrogels with good mechanical (fracture strain: 917 %; fracture stress: 202 kPa; toughness: 1.1 MJ m −3 ) and self-healing properties. After self-healing, the fracture stress is almost fully recovered, the fracture strain is restored to 72 %, and the conductivity is reestablished to 98 %. The conductive hydrogels show good fatigue resistance during cyclic tensile and compressive loading-unloading tests. Furthermore, the mechanical deformation would lead to the resistance change of the hydrogel to realize the electrical signal record. So, the hydrogel was assembled into a flexible wearable sensor that has good electrical conductivity (0.779 S m −1 ), fast responsiveness (response time: 300 ms; recovery time: 200 ms) and high sensitivity (gauge factor (GF) = 7.99, 400–650 %). This work demonstrates a simple and efficient strategy for developing stretchable and self-healing conductive hydrogels in healthcare monitoring and flexible electronics.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xingwen Wang,Tong Wen,Yunliang Zhao,Renbo Gao,Lingjie Zhang,Shaoxian Song,Tingting Zhang
As a new type of separation material, two-dimensional membrane has attracted wide attention due to its special transport mechanism. However, due to the hydration swelling of montmorillonite nanosheets , there are still challenges in preparing two-dimensional membrane with stable channel structure and fixed interlayer spacing. In order to overcome the problems caused by swelling, this study used polyvinyl alcohol and polyacrylic acid to stabilize the channel structure of two-dimensional membranes. Moreover, the crosslinking between Fe 3+ and montmorillonite nanosheets was proposed to fix the interlayer spacing of two-dimensional membrane. It is found that various polymers had different effects on the mechanical property of two-dimensional membrane. The addition of polyvinyl alcohol and polyacrylic acid can significantly improve the tensile strength of the membrane. And the introduction of them reduces the hydrophilicity of the membrane surface, thus improving the stability of the membrane in water. In addition, the interlayer cations affect the stability of interlayer spacing of the membrane in water. After crosslinking the membrane with Fe 3+ , the interlayer spacing is fixed and can be maintained at about 0.94 nm in water for a long time. When a certain dosage of polyvinyl alcohol and PAA are added into the membrane and the crosslinking conditions are suitable, two-dimensional membrane has good selectivity to Li + and Mg 2+ in high Mg/Li ratio brine. Inspired by the natural ion exchange properties of montmorillonite, this study found a new method for inhibiting the hydration swelling of two-dimensional membrane and realizing precise control of interlayer spacing.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
IET Nanobiotechnology
·
2016
·Vol. 11
·期 2
·200-204
·
IF 1.541
Dan Zhu,Wenfeng Zhu,Weiwei Wang,Xiaoheng Liu
Aiming to monitor hydrogen peroxide and oxidizing ions in aqueous circumstance, functionalized attapulgite [i.e. gold-modified attapulgite nanocomposites (Au/ATP NCs)] as peroxidase mimics were prepared by loading β-cysteamine-capped gold nanoparticles onto attapulgite with the use of electrostatic interactions. As-prepared Au/ATP NCs were used for the detection of H 2 O 2 . The linear range and detection limit for H 2 O 2 were determined by quantitative experiments emerging excellent stability and recyclability. The peroxidase-like activity of Au/ATP NCs could be expanded for the detection of some oxidative ions (Fe 3+ and Ag + ) was also been discovered. Based on the absorption spectrum and steady-state kinetics, the mechanism for peroxidase mimic reaction is investigated. This work represents the first example of multitarget detection for molecule and cations (H 2 O 2 , Fe 3+ and Ag + ) using Au/ATP NCs as peroxidase enzyme mimics and holds a promise for future biomedical and analytical applications.
研究领域:
生物化学
·
分析化学
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DOI
高影响因子
Materials Today Nano
·
2022
·
IF 13.364
Waheed Ullah Khan,Ping Zhou,Liying Qin,Abid Alam,Zhangjie Ge,Yuhua Wang
Carbon dots with dual emission have drown increasing attention in biology and medicine due to their fascinating optical and biological properties. Herein, dual emissive nitrogen-doped carbon dots (N-doped CDs) are synthesized by simple annealing of ammonium citrate in the air via solvent-free carbonization . Interestingly, N-doped CDs display dual emission peaking at 462 nm and 560 nm under excitation of 360 nm and 470 nm, respectively. The dual PL emission spectra of the N-doped CDs illustrate that each emission is associated with the single excitation band. The data reveals that two autonomous fluorescent centres are co-existed in N-doped CDs because doping with nitrogen (N) could change the surface chemistry of the CDs. In addition, dual emissive N-doped CDs have significantly low toxicity and could be applied as multicolor cell imaging using T-ca cancer cells. Moreover, obtained N-doped CDs are sensitive to temperature in the range of 15–90 °C and show potential to detect temperature in living cells. Furthermore, low toxicity and high biocompatibility proved that the obtained N-doped CDs could be applied in vivo imaging. Besides, the dual emissive N-doped CDs have the ability to probe Fe 3+ ions in water as well as in living T-ca cells.
研究领域:
材料科学
·
生物学
·
医学
·
化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yabin Zhang,Kai Fung Chan,Ben Wang,Philip Wai Yan Chiu,Li Zhang
Fluorescent carbon dots hold great promise in biomedical real-time tracking due to their outstanding optical properties and biocompatibility. Here, we report a one-pot synthetic strategy to produce multi-doped carbon dots (MCDs) with bright and color-tunable emission. The resultant MCDs are doped by abundant biogenic elements (O, N, P), so that they contain a variety of surface functional groups. Such hetero-doping and functionalization make MCDs display strong fluorescent emission and excitation-wavelength-dependent characteristic, good aqueous solubility as well as high photo-stability and ion-stability. Moreover, the as-prepared MCDs response to the change of pH values and exhibit high selective and sensitive detection of Fe 3+ ions under blue light illumination with the limit of detection (LOD) of 15.9 nM. Such a Fe 3+ sensing ability is further demonstrated in real water samples and extended to intracellular multi-color monitoring of Fe 3+ . More interestingly, the MCDs can also sense the gastrointestinal bacteria Escherichia coli , exhibiting linear sensing dependent behavior. With low cytotoxicity and tunable emission, such MCDs hold great potential as efficient multi-color probes and imaging agents for clinical diagnosis.
研究领域:
生物医学
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材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 21
·16368-16375
·
IF 3.84
Yupeng Sun,Chen Shen,Jing Wang,Yun Lu
A facile, simple, effective and green method has been developed to synthesize nitrogen and sulfur co-doped carbon dots (N, S-CDs) from heparin sodium. The as-prepared N, S-CDs possess naked-eye observable blue-green luminescence, good biocompatibility, low toxicity and strong fluorescence in live cell imaging, indicating their great potential to serve as high quality optical imaging probes. Besides, the N, S-CDs can also be used as a competitive fluorescent sensing platform for the detection of Fe3+.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Yongsheng Lu,Xingxing Yang,Lu Xu,Zhan Wang,Yunfeng Xu,Guangren Qian
The Fe3+/persulfate system for Rhodamine B (RhB) oxidative degradation has been investigated. The catalytic mechanism in the Fe3+/persulfate system was proposed as follows: Fe3+ was restored to Fe2+ by the generated intermediate products during the degradation process. The influence parameters were examined in batch experiments, including Fe3+ and persulfate concentration and initial pH. The results indicated that the Fe3+/persulfate system exhibited good performance for RhB degradation and followed first-order kinetics. 95.91% of the RhB was removed within 30 min under the following conditions: [Fe3+]0 = 1 mM, [persulfate]0 = 1 mM and pH 3.0. The RhB degradation efficiencies increased as the Fe3+ and persulfate concentrations increased. In addition, the RhB degradation was inhibited in the presence of inorganic anions, which was primarily due to a complex reaction between Fe3+ and various anions except for .
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
Wood Material Science & Engineering
·
2024
·
IF 2.2
Mengyao Chen,Haiqiao Zhang,Xingzhou Yao,Ke Tong,Yan Wu
Deep eutectic solvents (DES) offer advantages such as environmental friendliness, recyclability, and biocompatibility, demonstrating promising applications in functional materials, chemical reactions, and electrochemistry. This study investigated the softening effect of DES on beech with the assistance of FeCl3, considering different treatment durations (1, 2, 3, and 4 h) on varying thicknesses (1, 2.5, 3.5, and 5 mm). Results indicate that longer treatment time leads to better softening effects on beech wood at the same thickness. FeCl3 acts as an active site providing acidic protons, thereby enhancing the softening efficiency of DES. Wood treated with Fe3+-assisted DES removes 86% of the lignin and 48% of the hemicelluloses, resulting in enhanced flexibility. Scanning electron microscopy reveals that most of the vessel lumens, cell lumens, and intercellular spaces of beech wood treated with Fe3+-assisted DES are filled with DES, reducing the wood's porosity. Color difference analysis and energy-dispersive X-ray spectroscopy demonstrate that wood color darkens gradually with prolonged treatment time, correlating with the addition of FeCl3. Thermal analysis indicates an improvement in the flame retardancy of the treated wood. This research methodology significantly enhances wood utilization and diversifies the aesthetic possibilities of wood products, thereby may expanding their applications in architecture and furniture.
研究领域:
材料科学
·
林业科学
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DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 11
·2331
·
IF 4.6
Ajeesh Kumar Somakumar,Ivo Romet,Agnieszka Grabias,Marcin Kruk,Shusaku Hayama,Damian Wlodarczyk,Justyna Barzowska,Yadhu Krishnan Edathumkandy,Eduard Feldbach,Puxian Xiong,Yaroslav Zhydachevskyy,Monika Trzaskowska,Hanka Przybylinska,Andrzej Suchocki
An extensive experimental study of trivalent iron (Fe3+) ions in orthorhombic lithium gallate nanocrystals was undertaken. Various spectroscopic methods, such as Raman spectroscopy, extended X-ray absorption fine structure, the Mössbauer effect, electron paramagnetic resonance, photoluminescence, thermoluminescence, and cathodoluminescence were used to investigate the synthesized phosphor. This study revealed the existence of multiple Fe3+sites, out of which the tetrahedral sites are preferentially occupied. Extensive optical studies showed that the Fe3+doped lithium gallate phosphor is a promising candidate for various luminescence and thermoluminescence-related applications in the near-infrared regime.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Linli Hou,Yonghai Song,Yingjie Xiao,Rong Wu,Li Wang
Fluorescent metal-organic frameworks (MOFs) have attracted wide attention in fluorescence detection. Herein, a novel sensing platform for highly selective and sensitive detection of Fe 3+ in aqueous solution was proposed based on 2,5-dihydroxyterephthalic acid (DOBDC)-Zn 2+ MOFs (ZnMOF-74). The as-prepared ZnMOF-74 exhibited uniform clavicorn nanostructures and high day-to-day stability in acidic aqueous solution (pH 4.0). Because of the special response of phenolic hydroxyl groups of DOBDC with Fe 3+ , the cation exchange between Fe 3+ and Zn 2+ occurred, which caused collapse of the skeleton and formed a blue weak-fluorescent iron(III)-phenol salt complex (Fe-DOBDC), which led to the effective fluorescence quenching of ZnMOF-74. ZnMOF-74 was used as a probe for detection of Fe 3+ under relatively acidic condition with a good linear range of 0.1–100 μM and a low detection limit of 40 nM. The fluorescence probe was also applied to determine Fe 3+ in real river water and human serum with good recovery and accuracy. This work provided a good Fe 3+ sensor based on ZnMOF-74 due to high affinity between phenolic hydroxyl group and Fe 3+ .
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
Water Supply
·
2022
·Vol. 22
·期 5
·4852-4863
·
IF 1.768
Zhang Lei,Qian Zheng,Wang Lingzhen,Jin Pengkang,Yang Shengjiong
Fe 2+ is widely used for effective peroxymonosulfate (PMS) activation to eliminate refractory organics. However, Fe 2+ /PMS process suffers from difficulty on Fe 2+ regeneration. Herein, we report an Fe 3+ /PMS process by using gallic acid (GA) as an effective promotor for efficient degradation of bisphenol A (BPA). The process exhibited considerable oxidation performance in the pH range of 3.0–10.0. Higher concentration of Fe 3+ /GA complex exhibited better BPA degradation performance whereby BPA could be completely degraded within 4 mins. Reactive oxidation species (ROS) quenching experiments, electron paramagnetic resonance (EPR) analysis, and methyl phenyl sulfoxide (PMSO) probing experiments revealed that sulfate radical (SO 4 •− ), hydroxyl radical (HO • ), and ferryl species are involved and responsible for the BPA degradation. Electrochemical analysis and density function theory (DFT) calculation explored that the self-oxidation of GA boosted the reduction of Fe 3+ into Fe 2+ for continuous activation of PMS. The GA boosted Fe 3+ /PMS system reached an intriguing mineralization efficiency of 86.4%. Findings from this work proposed references to improve the oxidation performance of Fenton-like reaction and provided new sight into the Fe 3+ /Fe 2+ cycling. Gallic acid significantly promoted the Fe 3+ /Fe 2+ cycling. The oxidation performance of Fe 3+ /peroxymonosulfate could be largely elevated by gallic acid. More than 86.4% of BPA could be mineralized by the Fe 3+ /peroxymonosulfate/gallic acid process.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Mi Feng,Yumeng Wang,Bin He,Xinyan Chen,Jian Sun
Carbon dots (CDs) derived from biomass have attracted increasing interest not only due to their sustainability, biocompatibility, and application in metal ion detection but also due to the valorization of waste renewable materials. Herein, tunable photoluminescent (PL) chitin-based CDs were prepared using a deep eutectic solvent (DES) made from a quaternary ammonium salt and sulfonic acid in one step. The DES played two roles during the synthesis procedure: CD formation and surface modification. The PL emission wavelength of the CDs was red-shifted via a strategy of heteroatom doping and size adjustment by changing the structure of the DES and experimental temperature. The structure of sulfonic acid in the DES was the major factor affecting the PL emission peaks of the obtained CDs. The nitrogen-, oxygen-, and sulfur-doped CDs with the highest PL emission peaks at 515 nm were prepared with ChCl/sulfamic acid (1:2 molar ratio) treatment at 150 °C for 5 h. The results demonstrated that the different sizes and surface amino and hydroxyl groups were the main reasons for the red shift of PL emission properties. Additionally, the prepared CDs exhibited high sensitivity for Fe3+ with a limit of detection of 0.43 μM, and the concentration range was 40–600 μM.
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产品关联
DOI
高影响因子
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