ENZYME AND MICROBIAL TECHNOLOGY
·
2018
·
IF 2.932
Fan Li,Yuanyuan Yu,Qiang Wang,Jiugang Yuan,Ping Wang,Xuerong Fan
Polydopamine (PDA) films are generally produced by spontaneous oxidation of dopamine in basic medium, which is a highly convenient method for surface modification. This method is, however, not suitable for alkaline sensitive materials, which have poor stability in alkali medium and need over-long reaction time. Herein, we compared two dopamine polymerization methods: conventional method (induced by O 2 at pH 8.5) and laccase-catalyzed method (at pH 5.5). The comparison showed that the polymerization of dopamine was greatly improved when catalyzed by laccase. The PDA film obtained from laccase-catalyzed method was more uniform and more stable compared with that obtained from the conventional method; the film was able to further react with amine-terminated molecules. As a result of laccase, ether bonds were found between dopamine units of PDA; while such bonds were not observed in film obtained from the conventional method. This work can be a basis for a better understanding of structure and property relationships of PDA coating.
研究领域:
生物化学
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材料科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
·
IF 3.131
Hao Yang,Hanlin Ding,Xiaonuo Zhang,Xuegang Luo,Yu Zhang
In this study, a new surface-modified biobased composite was obtained by modifying the surface of fungal mycelium microspheres (FHMs) with polydopamine (PDA). A. niger mycelium/PDA microspheres (AM/PDA microspheres) were used as a highly efficient adsorbent for the removal of U(VI) ions. This study examined the effects of the initial pH, ionic strength, and electrolyte ions on the U(VI) adsorption capacity of the AM/PDA microspheres. The results confirmed that U(VI) was successfully adsorbed on the AM/PDA microspheres. We compared their adsorption capacity with that of other adsorbents, and the adsorption rate and adsorption capacity of the AM/PDA microspheres were found to be higher than those of the other adsorbents. Equilibrium was achieved after 300 min, and the AM/PDA microspheres had a maximum adsorption capacity of 250.70 mg/g. We aimed not only to investigate the factors that affect the adsorption process but also to provide a new mycelial-based composite adsorbent for U(VI)-contaminated water.
研究领域:
环境科学
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生物材料学
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DOI
高影响因子
MATERIALS LETTERS
·
2022
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IF 3.574
Zhiye Qiu,Bin Wu,Huali Miao,Yang Yang,Zili Wang,Minghua Wu,Jiping Wang,Jindan Wu
Herein, a rapid and efficient deposition of polydopamine (PDA) was achieved by using a solvent-assisted method. Decamethyl cyclopentasiloxane (D5) was selected as the solvent, in which the hydrophilic dopamine suspended and approached the fabric rapidly due to its natural affinity with the hydration layer of the cotton fibers . The fast formation of PDA coatings was realized with high utilization of dopamine and improved uniformity. It was found that the type and amount of liquid presoaked by the fabric were critical for the PDA deposition process. This novel method is applicable for the deposition and reaction of various hydrophilic finishing agents on hydrophilic fabrics.
研究领域:
材料科学
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纺织工程
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DOI
高影响因子
PLoS One
·
2014
·Vol. 9
·期 11
·e113087
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IF 3.534
Ping Zhou,Yi Deng,Beier Lyu,Ranran Zhang,Hai Zhang,Hongwei Ma,Yalin Lyu,Shicheng Wei
Polydopamine (PDA) coating provides a promising approach for immobilization of biomolecules onto almost all kinds of solid substrates. However, the deposition kinetics of PDA coating as a function of temperature and reaction method is not well elucidated. Since dopamine self-polymerization usually takes a long time, therefore, rapid-formation of PDA film becomes imperative for surface modification of biomaterials and medical devices. In the present study, a practical method for preparation of rapidly-deposited PDA coating was developed using a uniquely designed device, and the kinetics of dopamine self-polymerization was investigated by QCM sensor system. It was found that high temperature and vigorous stirring could dramatically speed up the formation of PDA film on QCM chip surface. Surface characterization, BSA binding study, cell viability assay and antibacterial test demonstrates that the polydopamine coating after polymerization for 30 min by our approach exhibits similar properties to those of 24 h counterpart. The method has a great potential for rapid-deposition of polydopamine films to modify biomaterial surfaces.
研究领域:
生物材料学
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表面化学
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医学工程
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xin Liu,Wei Yu,Xiaowei Mu,Wei Zhang,Xinghua Wang,Qiang Gu
A rapid and sensitive strategy for sensing dopamine (DA) was proposed based on the fluorescence quenching effects of polydopamine (PDA) on carbon dots (CDs). The green-emission fluorescence CDs were synthesized via a facile one-pot hydrothermal approach by employing p-phenylenediamine and ethanol as reagents. In alkaline environments, DA would polymerize to form PDA on surface of CDs, resulting in the fluorescence quenching of the detection system owing to the effects of fluorescence resonance energy transfer (FERT) and inner filter effect (IFE). The proposed fluorescence probe exhibits good selectivity and sensitivity to DA in the concentration range of 0.1–15 μM, with a limit of detection (LOD) of 37 nM. Results of detecting DA in serum samples indicate the broad potential of the proposed strategy for future application in diagnosis of DA-related diseases.
研究领域:
分析化学
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医学诊断
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生物传感
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 12
·1-12
·
IF 5.3
Huang Yang,Wu Shangming,Yang Siyi,He Miao,Ma Wenhao,Fa Huanbao,Wang Yongzhong,Hou Changjun,Yang Mei
Dopamine (DA) is a key neurotransmitter whose concentration affects various neurological disorders. Unlike previous methods that synthesize non-fluorescent polydopamine (NFL-PDA) under alkaline conditions, this study introduces a novel “turn-off” sensing method for DA using NFL-PDA synthesized through a unique reaction pathway. In our approach, CuO 2 nanodots, created via a simple reduction method, catalyze the formation of hydroxyl radicals (•OH) in acidic conditions, triggering the oxidative polymerization of DA into NFL-PDA. The reaction between DA and CuO 2 nanodots in acidic solution was examined to understand the process. UiO-66-NH 2 was then used to test NFL-PDA’s fluorescence quenching ability and to further investigate the DA determination mechanism. Results showed that fluorescence quenching was due to enhanced non-radiative energy transfer and Förster resonance energy transfer (FRET) between NFL-PDA and UiO-66-NH 2 . This led to the development of a simple “turn-off” fluorometric DA determination method with a linear range of 0.1–200 μmol/L and a limit of detection (LOD) of 0.0575 μmol/L. Although this method does not outperform existing NFL-PDA synthesis methods under alkaline conditions, it provides a new synthesis approach and application for sensing DA, contributing to the basic theory of chemical sensing. Additionally, DA determination in human serum samples was successfully achieved, with results consistent with high-performance liquid chromatography (HPLC). Graphical abstract
研究领域:
化学传感
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神经科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Li Cheng,Chengbao Liu,Hao Wu,Haichao Zhao,Feixiong Mao,Liping Wang
Dopamine (DA), one type of mussel-inspired biological molecules with adhesive nature and corrosion inhibitor property, are often used to functionalize the surfaces of various materials. Herein, we report the application of polydopamine (PDA) microcapsules as novel nanocontainers for the purpose, loading corrosion inhibitor (benzotriazole) in its shell structure, and then were embedded into epoxy coatings to provide self-healing and anti-corrosion protection for carbon steel. Fast release of benzotriazole in acidic environment caused by local corrosion and the chelating effect of PDA-Fe 3+ can synergistically promote the formation of protective film on bare steel surface, which endows coatings with self-healing functionality. Electrochemical impedance spectroscopy (EIS), local electrochemical impedance spectroscopy (LEIS), and spray tests were conducted to evaluate the active inhibition and corrosion resistance of the loaded coatings. The scratched coating with incorporation of nanocontainers presented better protection performance, exhibiting increased R o (oxide layer resistance) and R ct (charge transfer resistance) during initial immersion periods. The EIS tests in long-term immersion were also performed to confirm the anti-corrosion effect of composited coatings. These results demonstrated that benzotriazole-decorated PDA capsules dramatically enhanced the self-healing properties and anti-corrosion performance of epoxy coatings with the synergistic help of PDA and benzotriazole.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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DOI
高影响因子
CHEMICAL & PHARMACEUTICAL BULLETIN
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2020
·Vol. 68
·期 7
·628-634
·
IF 1.416
Jianfeng Pan,Chenfang Miao,Yuanting Chen,Jiahui Ye,Zhenzhen Wang,Wendi Han,Zhengjun Huang,Yanjie Zheng,Shaohuang Weng
Facile and effective detection of dopamine (DA) plays a significant role in current clinical applications. Substantially, special optical nanomaterials are important for fabricating easy-to-control, cheap, selective, and portable fluorescence DA sensors with superior performance. Herein, carbon dots (CDs) prepared from melting method were applied as signal to establish a simple but effective fluorescence strategy for DA determination based on the enzymatic activity of acid phosphatase (ACP), which induces DA to form polydopamine (pDA). The formed pDA caused by the enzymatic oxidization of ACP toward DA can interact with CDs through the inner filter effect. Such behavior effectively quenched the CDs’ fluorescence. The degree of fluorescence quenching of CDs was positively correlated with the DA content. Under the optimized reaction conditions, the proposed fluorescence method exhibited a comparable analytical performance with other DA sensors with good selectivity. Furthermore, this method has been successfully applied to detect DA in DA hydrochloride injection and human serum samples. It shows that this method features potential practical application value and is expected to be used in clinical research.
研究领域:
生物化学
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医学检测
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纳米材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Renjie Li,Jinyan Li,Linhua Rao,Hongjun Lin,Liguo Shen,Yanchao Xu,Jianrong Chen,Bao-Qiang Liao
Mussel-inspired polydopamine (PDA) modification of membrane is an effective alternative for improving permeation flux and anti-fouling performance. Meanwhile, efficient method for oil-water emulsions separation is still highly desired. However, problems, such as time-consuming process and low utilization ratio of expensive raw material, have always been stumbling block to application of this strategy. In this study, inkjet printing of dopamine (DA) followed by UV light irradiation to modify mussel-inspired polyvinylidene fluoride (PVDF) membrane was proposed. Accordingly, PVDF membrane was inkjet printed by alternately using DA inks and alkaline tris (hydroxymethyl) aminomethane (Tris) ink. The resultant membrane was then subjected to photopolymerization under UV irradiation to form a PDA layer. Successful formation of PDA layer on membrane surface was verified by series of physical and chemical methods . The optimized membrane (DA 80-60 /PVDF) exhibited superior oil/water separation performance with 1.5 times permeate flux higher than that of the pristine PVDF membrane and above 99% oil rejection rate. Meanwhile, the modified membranes showed satisfactory stability in aqueous solution with wide pH range (pH 2.0–7.0). The novel membrane modification method proposed in this study is facile, cost-saving and environment-friendly, serving as a competitive candidate for fabrication of efficient membranes for oil-water emulsion separation.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Yuyuan Chen,Zhenzhen Wang,Xiaoli Hao,Fenglan Li,Yanjie Zheng,Jianzhong Zhang,Xinhua Lin,Shaohuang Weng
Detection of acid phosphatase (ACP), a universal and important enzyme, is crucial in monitoring several diseases. However, the selectivity of ACP detection under neutral conditions is poor. Herein, ACP was found to catalyze dopamine as a new substrate to polydopamine in acidic or neutral conditions, whereas alkaline phosphatase (ALP) failed to serve such function. The catalytic mechanism underlying the formation of polydopamine was investigated. A simple assay for ACP was developed using fluorescent carbon dots as a signal indicator. In the presence of ACP, dopamine polymerization was conducted in situ and carbon dots were quenched through the inner filter effect. This fluorescent bioassay illustrated a good analytical performance with a wide linear range and a detection limit of 0.45 U/L. In particular, ACP showed high selectivity from the interference of ALP under neutral conditions. Furthermore, excellent test recovery in human serum samples demonstrated the predictable applications of this method in clinical and biomedical areas.
研究领域:
生物化学
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医学检测
·
分析化学
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DOI
高影响因子
Journal of Experimental Nanoscience
·
2020
·
IF 2.169
Xinghui Gong,Tong Wang,Zhendong Zhang,Xiao Wei
In this article, we report a simple, effective, sensitive, non-toxic and environmentally friendly method for the detection of dopamine (DA). This method utilises the property of the self-polymerization of dopamine under alkaline conditions, and gets the concentration of dopamine by measuring the fluorescence intensity of polydopamine (PDA) nanoparticles. And this method only uses NaHCO3 to start the polymerization process, so that the detection experiment becomes simple and inexpensive. The fluorescence intensities of the mixed solution produced at different reaction times and different concentrations were studied. Finally, a good linear relationship was obtained in the range of 1.0-400 μM with a correlation coefficient of 0.9946 and a detection limit of 0.3 μM. The method has high selectivity and important application value for detecting dopamine-related diseases.
研究领域:
生物化学
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医学诊断
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 47
·40698-40705
·
IF 3.289
Yunzhou Ni,Gangsheng Tong,Jie Wang,Huimei Li,Feng Chen,Chunyang Yu,Yongfeng Zhou
A pre-mixing and post-polymerization strategy has been developed for one-pot preparation of pomegranate-like polydopamine (PDA) stabilized small gold nanoparticles (AuNPs) with sizes smaller than 5 nm in aqueous media. Firstly, the pre-mixing of dopamine (DA) and HAuCl4 was used to generate the Au clusters as nucleating seeds. Secondly, the rapid self-polymerization of DA into polydopamine (PDA) and simultaneous Au redox reaction were initiated when the pH of the reaction system was tuned to 8 by the injection of a NaOH solution into the mixture, leading to the formation of the pomegranate-like PDA–AuNPs nanocomposites with small AuNPs well dispersed inside. The as-prepared nanocomposites exhibited superior stability in high saline conditions (500 mM NaCl) and were able to be coated onto a filter paper to form paper catalysts, which were used as recyclable catalysts for the reduction of high concentrated (50 mM) 4-nitrophenol (4-NP) with a TOF of 1006 h−1.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
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