Materials Science & Engineering C-Materials for Biological Applications
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2021
·
IF 7.328
Ying Wang,Hui Zhang,Haichuan Zhang,Junqing Chen,Bingyun Li,Shiyu Fu
A novel dual ionic network cellulose-based composite conductive self-healing hydrogel was fabricated with high elongation, rapid recoverability, high conductive sensitivity, self-healing ability and good biocompatibility. The hydrogel was constructed by the synergistic complexations of new-fashioned bidentate aldehyde groups on dialdehyde cellulose nanofibers (DACNFs) and carboxyl groups of acrylic acid (AA) with Fe 3+ . The elongation (~1300%) of the hydrogel containing 1 wt% DACNFs was approximate 13-fold of the pure PAA hydrogel and can recover to original state within 2 min after 80% compression. The self-healing efficiency increased with the addition of DACNFs in the dual ionic network cellulose-based composite conductive self-healing hydrogel. The hydrogel configured for a wearable test and showed high stretching sensitivity with a gauge factor of 13.82 at strain within 1.6%. The gauge factor (GF) decrease with the incremental strain within 20%. GF were 0.696 between 20% and 300% strain, 0.837 within 300% and 500%. Meanwhile, the current had a good linear relationship with the bending angles of hydrogels and pressure on hydrogels, which may provide a great potential in monitor both minor variations and large movements.
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PubMed
高影响因子
ACS Applied Polymer Materials
·
2021
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IF 4.089
Danyang Wang,Lu Qin,Weihu Yang,Ye He,Songyue Zhang,Yulu Yang,Kun Xu,Pengfei Gao,Jinxiu Yu,Kaiyong Cai
The conductive material used in traditional conductive hydrogels is inherently rigid, which makes the material’s mechanical properties poor. In addition, the use of chemical covalent bonds to form gels makes the hydrogel lack self-healing properties, which limits the conductivity and the application of gel. Based on the above reasons, we use the characteristics of the strong trivalent iron ion chelating ability to prepare a PVA/PAA/Fe3+ system three-dimensional network structure hydrogel and design a sandwich structure to encapsulate liquid metal gallium indium tin (GaIn) in the hydrogel. Inside, the strong conductivity of the liquid metal is used while protecting the liquid metal from being oxidized. In addition, we explore its mechanical properties, electrical conductivity, self-healing properties, adhesion properties, antibacterial properties, etc. and prove them by tensile stress–strain mechanic experiments, electrical impedance experiments, strain sensor signal detection, and biological signal detection experiments. The results show that the as-prepared hydrogel exhibited excellent self-healing performance and antibacterial ability and has mechanical properties that fit the elastic modulus of the skin. Compared with traditional Ag/AgCl electrodes, it can detect electrocardiogram and other biological signals very well as well as having long-lasting and repeated use.
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高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2021
·Vol. 38
·期 4
·2000332
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IF 3.31
Jiehao Lei,Zeming Huang,Pengxiang Gao,Jiahui Sun,Li Zhou
As a new class of metal-free fluorescent dots, sulfur quantum dots (SQDs) have attracted more and more attention because of their unique properties and promising applications in many fields. However, synthesizing SQDs with high optical stability and stimuli-responsive fluorescence is still in its infancy. Herein, a simple one-pot strategy is reported for preparing polyvinyl alcohol (PVA)-capped SQDs from cheap elemental sulfur by employing PVA as ligand. The as-prepared SQDs with size in range of 1.5–5 nm show fine water dispersibility and stability, bright fluorescence, good optical stability, and low cytotoxicity, which make them potential for cell imaging. In addition, the SQDs show sensitive and selective fluorescence quenching behavior toward Fe 3+ with a detection limit of 92 × 10 −9 m . Meanwhile, the SQDs also present temperature-dependent fluorescence and hold promise for working as a nanothermometer. For the first time, the utilization of SQDs for monitoring of Fe 3+ and temperature in the interior of cells is confirmed in this study. This work thus opens new opportunities for expanding the application fields of SQDs.
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高影响因子
EUROPEAN POLYMER JOURNAL
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2021
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IF 4.598
Suyan He,Li Xiao,Luminita Marin,Yike Bai,Xinjian Cheng
The development of water-soluble polymer dyes is of great practical and scientific significance. In this article, small fluorescent molecule boron-dipyrromethene (BODIPY) bearing C=C bond was synthesized first. And then, via Suzuki reaction, recognition groups were introduced into the 2, 6 positions of BODIPY. Thus polymerizable fluorescent monomers were prepared. Finally, methacrylic acid (MAA) was copolymerized with the as-prepared small molecular fluorescent monomers via reversible addition-fragmentation chain transfer (RAFT) polymerization methodology. Four fully-water-soluble polymer sensors with BODIPY moieties in the end of the polymer chain were obtained eventually. In the presence of long PMAA chain, and by the assistance of it, BODIPY could be dissolved totally in water. These polymer sensors exhibited sensitive and selective recognition ability to Fe 3+ . Even the content rate of BODIPY was as low as 0.5% of the polymer (calculated from element analysis), the detection limit could reach 1.2 μM. The sensors with two recognition groups in one BODIPY unit were more sensitive than that with one recognition groups in each BODIPY unit. The sensing mechanism was investigated as well. By endowing the water solubility to organic sensors, the application scope could be greatly enlarged in sensing metal ions in aqueous environments. This work provides a method to develop water soluble high performance polymer sensors.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Fengjiao Duan,Chenchen Liu,Xiaocan Liu,Lingling Wang,Shuai Zhang,Xiaobo Liu
In recent years, metal ions have been cross-linked with composite to improve their adsorption capacity, which has a wide range of applications in environmental treatment, biomedicine and other fields. In this work, Fe 3+ was complexed with block polyarylene ether nitrile (PEN) to form regular cubic blocks, which provided sufficient sites for the attachment of TiO 2 . Four types of PEN-Fe 3+ @TiO 2 hybrid cubes were successfully prepared by changing the content of TiO 2 . The adsorption and photocatalytic degradation properties of PEN-Fe 3+ @TiO 2 were evaluated by UV-Vis spectrophotometer. The results showed that the adsorption capacity of PEN-Fe 3+ @TiO 2 increased with the increase of TiO 2 , and the maximum adsorption capacity and the photocatalytic degradation ratio reached 914.42 mg/g and 99%, respectively. The effect of pH on the adsorption capacity was further studied and it was found that the PEN-Fe 3+ @TiO 2 composites showed better adsorption property under alkaline conditions. Moreover, the adsorption kinetic fitting showed that the whole adsorption process obeyed the pseudo-second-order kinetic model, which indicated that the adsorption process was dominated by chemical adsorption .
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Xiaohui Cheng,Panpan Sun,Na Zhang,Shujin Zhou,Xia Xin
Supramolecular self-assembly is a noncovalent bond-based method to build complex ordered aggregates with specific functions. However, self-assembly based on metal nanoclusters (NCs) has been rarely studied because of the poor water solubility and silent fluorescence in a single-molecular state of metal NCs. Here, water-soluble silver NCs (NH 4 ) 9 [Ag 9 (mba) 9 ] (Ag 9 -NCs, H 2 mna = 2-mercaptonicotinic acid) were synthesized with phthalic acid (PA) to form hydrogels using the self-assembly strategy. Due to the formation of hydrogen bonds , hollow tubes appear in the hydrogel. For comparison, isophthalic acid (IPA) and terephthalic acid (TPA) are selected to self-assemble with Ag 9 -NCs in aqueous solutions. The result shows that only PA can form a strong phosphorescent hydrogel due to the ligand-to-metal charge transfer (LMCT) and ligand-metal-metal charge transfer (LMMCT). In addition, the hydrogel is used as an excellent sensor for Fe 3+ , and the detection limit, which is defined as the change of 10% of fluorescence intensity , is 0.611 μM. This work shows that a hydrogel was successfully prepared using a supramolecular self-assembly strategy and will become a candidate in the fields of biological sciences and sensors.
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高影响因子
JOURNAL OF LUMINESCENCE
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2020
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IF 3.28
Bingxin Xie,Lei Lei,Enyang Liu,Gongxun Bai,Renguang Ye,Shiqing Xu
Novel blue LED excitable Ce 3+ -doped alkaline-earth sulfide nanocrystals are exploited for selective and sensitive Fe 3+ ions sensing in this work. The detection limit is calculated to be as low as 92.5 nM, which is better than most previous ultra-violet light excited fluorescence probes. The decreased radiative probability of the Ce 3+ : 5d by the NC surface environmental variation activates the sensing capability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Hainan Kuang,Zuyun He,Mu Li,Renfeng Huang,Yongqing Zhang,Xiaomin Xu,Lu Wang,Yan Chen,Shuaifei Zhao
Advanced oxidation processes (AOPs) based on persulfate (PS) has attracted great attention because of its outstanding performance for decomposing chlorinated aromatic hydrocarbons in wastewater. While Fe-based materials can effectively activate PS and are environment-friendly, the low stability of Fe 2+ and little activation capability of Fe 3+ limit the broad applications of Fe 2+ (or Fe 3+ ) activated PS system in practical applications. In this work, taking molybdenum disulfide (MoS 2 ) as the co-catalyst in Fe 3+ /PS system, we report a strongly enhanced persulfate activation efficiency of Fe 3+ /PS system by engineering S defects in MoS 2 . The combination of experiments and density functional theory (DFT) calculation demonstrate that S defects in MoS 2 modify the surface charge distribution, leading to the formation of an electron deficient center near S defect and increasing the electron density near Mo site. As a result, more Fe 3+ in Fe 3+ /PS system is reduced into Fe 2+ by MoS 2 with S defects, resulting in more reactive oxygen species generated. Furthermore, S defects promote the adsorption of Fe 3+ on the MoS 2 surface, which further enhance the activating performance for PS through promoting to form cycle of Fe 3+ /Fe 2+ . This work provides a new strategy for improving co-catalytic properties of MoS 2 and expands the application of Fe 3+ /PS system for contaminants remediation.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 2
·1-12
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IF 2.253
Yang Yongsheng,Gu Bingli,Liu Zhiduo,Chen Da,Zhao Yun,Guo Qinglei,Wang Gang
Doped carbon-based materials have attracted considerable attentions due to their extraordinary optical, thermal, and electronic properties. Herein, we demonstrate a facile and universal approach, which involves the hydrothermal treatment of citric acid and phosphonitrilic chloride trimer (Cl 6 N 3 P 3 ), for the production of nitrogen and phosphorus co-doped graphene quantum dots (N, P-GQDs). The obtained N, P-GQDs with a mean size of about 3.4 nm exhibit bright yellow fluorescence, good-solubility, and attractive optical stability. Although the quantum yield as high as 34.8% has been proved in our synthesized N, P-GQDs, the fluorescence can be also fleetly and selectively quenched by Fe 3+ ions. Therefore, high-performance Fe 3+ sensors are fabricated with N, P-GQDs, with an ultra-sensitive detection limit of 146 nM. Furthermore, high ionic strength, mild acids, and alkaline are demonstrated to have a small impact on the fluorescence intensity of the N, P-GQDs. Finally, the as-synthesized N, P-GQDs, with bright luminescence and excellent biocompatibility, are applied for bioimaging, e.g., fibroblast cells.
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高影响因子
DYES AND PIGMENTS
·
2020
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IF 4.613
Xueyan Liu,An Chen,Yuxin Wu,Chengyou Kan,Jianhong Xu
The stimulus-responsive P(MMA- co -BA- co -RhBUEA) latexes were prepared by miniemulsion polymerization of butyl acrylate (BA), methyl methacrylate (MMA), and a rhodamine-based probe RhBUEA. Their chemical composition and structures were characterized by FTIR and UV–Vis spectral analysis. Meanwhile, the effects of AIBN, SDS , and RhBUEA content on the miniemulsion polymerization and the morphology of latex particles were investigated. Based on the recipe of 30 mM SDS to the volume of water, 2 wt% AIBN and 5 wt% RhBUEA to the total monomers , the sensing properties of the resultant latex and its film were studied. Both the latex and the latex film displayed the noticeable color change, high sensitivity, superior selectivity, and anti-interference properties towards Fe 3+ over other metal ions in aqueous solution. The detection limits of the latex and the latex film were 0.122 and 0.208 μM, respectively. Furthermore, the film sensor exhibited good recyclability thanks to the off-on switch, possessing the potential as a portable and reversible chemosensor for the naked-eye detection of Fe 3+ .
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高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Yan Liang,Lingxia Xu,Ke Tang,Yutong Guan,Ting Wang,Hua Wang,William W. Yu
A novel kind of nitrogen-doped carbon dots (N-CDs) with strong blue fluorescence emission was synthesized via microwave pyrolysis method using humic acid, urea, and citric acid as the precursor. We found that the fluorescence emission of N-CDs can be firstly quenched by Fe 3+ (turn-off) and then recovered by glutathione (turn-on). Moreover, N-CDs applied as an “on-off-on” fluorescent sensor for the detection of Fe 3+ and glutathione (GSH) was further studied in this work. N-CDs showed good selectivity and sensitivity towards Fe 3+ than other metal ions, and the limit of detection (LoD) is lower to 0.102 μM. Furthermore, the stable N-CDs/Fe 3+ exhibited a high sensitivity detection for GSH with a LoD of 0.226 μM. In addition, density functional theory calculations were further performed to reveal the mechanism of the “turn-off” and “turn-on” process. According to geometries and frontier molecular orbital (FMO) results, N-CDs exhibited strong interaction with Fe 3+ rather than other metal ions, and the N-CDs/Fe 3+ complex exhibited the highest stability among other complexes. Furthermore, this “on–off–on” fluorescent sensor was successfully applied as a stain-screening detector for Streptococcus thermophilus with high production of GSH.
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高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zeming Huang,Yin Gao,Zhengyu Huang,Donglin Chen,Jiahui Sun,Li Zhou
Exploring an effective sensor to detect Fe 3+ and phytic acid (PA) is of great importance because the levels of Fe 3+ and PA have a vital impact on human health. Herein, we report a metal-free fluorescent nanoprobe for sensitive and selective sensing of Fe 3+ and PA based on the sulfur quantum dots (SQDs). The SQDs with high fluorescence quantum yield (17.6%) and low cytotoxicity can be directly synthesized from cheap elemental sulfur by one-pot reaction. The SQDs display responsive and selective fluorescence “on–off-on” behavior towards Fe 3+ and PA based on the introduction and elimination of electron transfer effect. The addition of Fe 3+ can cause non-radiative electron transfer associated with fluorescence quenching of SQDs, while the addition of PA enables SQDs/Fe 3+ complex release Fe 3+ to recover the fluorescence of SQD S . By utilizing these SQDs as a fluorescent nanoprobe, it shows good linear relationship for Fe 3+ and PA in the range of 0.05–120 µM and 0–12 µM, respectively. Moreover, its limit of detection (LOD) for Fe 3+ and PA can reach as low as 102 and 73.5 nM, respectively, which compares favorably to many reported fluorescent probes. Additionally, the use of this SQDs-based sensor to detect PA in fresh carrot and lettuce samples was examined with satisfactory performance.
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高影响因子
危险品化学品经营许可证（带存储）