MACROMOLECULAR CHEMISTRY AND PHYSICS
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2011
·Vol. 212
·期 17
·1900-1909
·
IF 2.437
Wenguang Leng,Shuxue Zhou,Limin Wu
Nail/spindle-shaped polyaniline is synthesized by chemically oxidizing aniline with ammonium persulfate in a near-neutral aqueous medium using PVP as the stabilizing agent. The type of dispersing agent, APS content and aniline concentration have obvious impacts on the morphology of the resulting polyaniline. Typically, in the concentration ranges of 1.5–6 × 10 −4 M PVP and 0.02–0.05 M aniline and for molar ratios [APS]:[aniline] of 0.4:1 to 0.8:1, nail/spindle-shaped polyaniline can be obtained. A possible mechanism is proposed to elucidate the formation process.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 9
·1610-1618
·
IF 3.382
Jie Wang,Xiujuan Wu,Xiang Cao,Youxiang Jiang,Dongen Zhang,Tang Yang,Fan Zhang,Yuhui Luo
Three different morphologies of CePO4 nanocrystals (rods, columns, and spindle-like assembled nanosheets), spindle-like LaPO4, spindle-like PrPO4, and TbPO4 microspheres were successfully synthesized using a hydrothermal method. Interestingly, the morphology of the self-assembled spindle-like CePO4 underwent a change from big spindles to short spindles, to a cluster of spindles, and finally to spindle-like assembled nanocrystals with the increase of time. Using a single-step process, the nanocrystals were fixed on the surface of a glassy carbon electrode (GCE) using a Nafion membrane solution, which increased the specific surface area and electron transfer rate. The presence of CePO4, especially the spindle-like assembled nanosheet CePO4 (S-CePO4), greatly improved the effective surface area of the GCE, thereby increasing the conductivity of the GCE-based electrochemical sensor. The highly ordered superstructures of S-CePO4 were assembled from homogeneous spindles with an average length of 100 nm and a center diameter of approximately 50 nm. The use of the S-CePO4 sensor resulted in a 229% increase of the specific surface area (compared with that of the bare GCE-based sensor) and excellent electrocatalytic performance toward the electrochemical oxidation of hydroquinone (HQ), catechol (CC), and resorcinol. The linear range and detection limit for the determination of CC were 0.07 and 20–1200 μM, respectively. Our findings demonstrate the potential of the S-CePO4@GCE-based electrochemical sensor for the simultaneous determination of CC and HQ. The morphology and structure of S-CePO4 reduced the resistance significantly and increased the effective active surface area and the electrolyte contact area, making it more advantageous to the utilization of the active components.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2016
·
IF 1.753
Jie Li,Bo Xu,Guangning Liu,Guozhu Chen,Tao Zhang,Fengshou Zhang,Cuncheng Li
In this study, an effective wet-chemical route was developed in an aqueous solution for the synthesis of spindle-like palladium nanoparticles (Pd NPs). Spindle-like Pd NPs in high-yield were successfully synthesized by using cetyltrimethylammonium chloride (CTAC) as surfactant and ascorbic acid (AA) as reduction reagent. The influence factors including the concentration of CTAC, AA, and NaI, as well as the reaction temperature for synthesis of spindle-like Pd NPs were systematically investigated. The formation mechanism of spindle-like Pd NPs was proposed on the basis of these experimental results. Spindle-like Pd NPs with high density of twins and sharp edges exhibit enhanced catalytic activities for the reduction of 4-nitrophenol.
研究领域:
材料科学
·
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yao Ji,Zhiyuan Pan,Tiangang Ma,Ke Wang,Xiaoxian Zhao,Quan Jin
Hierarchical porous spindle-shaped MIL-88B (HPS-MIL-88B) with core-shelled structure was prepared by citric acid-assisted. The material exhibits open channels on its outer surface and a hierarchical internal cavity structure with meso-/macro-pores. The samples were then pretreated at 200 °C to form an oxide film , aiming to improve the conductivity of material. The as-prepared HPS-MIL-88B-6 h@Fe 2 O 3 material with core-shelled structure exhibits superior selectivity and high sensitivity to trimethylamine (TMA) at 200 °C (detection limit as low as 1 ppm) with fast response and excellent repeatability. The outstanding sensing performance was owing to the open and hierarchical porous that enhances the reaction between the target gas and the active sites of the material. In addition, the metal unsaturated active sites of MIL-88B (Lewis’s acid) can selectively undergo acid-base reactions with TMA (Lewis’s base), enhancing the generation of oxygen species and improving the selective adsorption capacity towards the target gas. This work provides a new path route for the application of MOF materials in sensors.
研究领域:
材料科学
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化学传感器
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纳米材料
·
气体传感
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Xiaokai Sun,Canguo Li,Qiying Zhu,Haowei Huang,Wei Jing,Zhiwei Chen,Ling Kong,Lei Han,Jun Wang,Yueyun Li
Food allergies have become a nonnegligible food safety issue, and milk allergies are one of the most common food allergies, that has attracted large consumer attention. In this work, a novel label-free photoelectrochemical (PEC) immunosensor for the detection of the allergen β-lactoglobulin (β-LG) in dairy products was designed that used the specific recognition of allergen β-LG and antibodies in dairy products in combination with biosensing technology . Here, Ag 2 S-sensitized spindle-shaped BiVO 4 /BiOBr heterojunction was fixed on the surface of the ITO electrode as an excellent photoactive substrate and effectively improved the photocurrent responses and sensitivity. Thioglycolic acid (TGA) was used as a linker to immobilize the β-LG antibody on the surface of the electrode. The photocurrent was detected at different antigen concentrations, which realized the quantitative testing of β-LG. Under the optimal experimental conditions, the PEC immunosensor proved an ideal linear relationship ranging from 10 pg/mL to 100 ng/mL, with a low detection limit of 3.7 pg/mL. The designed immunosensor showed good stability, a wide linear range, high sensitivity and good reproducibility and could be used for the detection of actual samples. The PEC immunosensor had a strong ability to specifically recognize β-LG, which was not affected by other proteins in the milk without pretreatment . Meanwhile, the developed immunosensor provided a promising PEC detection platform and reference idea for the detection of other proteins in milk.
研究领域:
食品科学
·
分析化学
·
生物传感器
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免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 11
·期 10
·2102359
·
IF 11.092
Hongjian Zhang,Wenping Ma,Hongshi Ma,Chen Qin,Jiajie Chen,Chengtie Wu
The treatment of severe burn injuries is a crucial challenge in skin tissue engineering. Severe burns are always accompanied with large-area neurovascular networks damage, leading to the lack of excitation functions and difficulty in self-healing. Therefore, it is of great importance to develop biomaterials which can not only promote wound healing but also simultaneously reconstruct cutaneous neurovascular networks. In this study, Zn 2 SiO 4 (ZS) nanoparticles-incorporated bioactive nanofibrous scaffolds are designed for innervated and vascularized skin burn wound healing. ZS nanoparticles with spindle-like morphology are synthesized via a facile hydrothermal method. The incorporation of ZS nanoparticles endows the scaffolds with excellent angiogenic and neurogenic activities in vitro. Additionally, in vivo results show that the ZS nanoparticles-incorporated scaffolds have favorable re-epithelialization, innervation, and vascularization abilities through local release of bioactive Zn and Si ions from ZS nanoparticles, leading to rapid wound healing featuring with newly formed blood vessels and nerve fibers. Taken together, this study suggests that the spindle-like ZS nanoparticles are useful bioactive agents for stimulating vascularization and innervation of functional skin repair. The bioactive inorganic nanoparticles may be used for multifunctional tissue regeneration.
研究领域:
组织工程
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生物医用材料
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伤口愈合
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纳米技术
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再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）