JOURNAL OF APPLIED POLYMER SCIENCE
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2011
·Vol. 123
·期 5
·2906-2910
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IF 1.24
Fang Wang,Junjun Liu,Yanni Li,Yabin Wang
Electropolymerization nanofilm was prepared by cyclic voltammogram with 6 N , N -diallylamino-1,3,5-triazine-2,4-dithiol monosodium (DAN) on the AA5052 surface in 0.15 M NaNO 2 at 10°C, then octyl-triethoxysilane (OTES) film was fabricated on the poly(6 N , N -diallylamino-1,3,5-triazine-2,4-dithiol) nanofilm (PDA) covered AA5052 surface by self-assembling method to obtain the composite polymeric nanofilm (C-PDA/OTES). The composite polymeric nanofilm was characterized by means of FTIR spectra, scanning electron microscope (SEM), contact angle, and potentiodynamic polarization. The results showed that the C-PDA/OTES covered surface was more homogenous, compact, hydrophobic compared with PDA covered surface and had excellent protection efficiency. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Xiaoming Li,De Zhang,Yufeng Wang,Jie Huang,Qianmin Dong,Shangzhong Jin,Pei Liang
This work proposes the application of multi-residue Surface-enhanced Raman spectroscopy (SERS) detection based on an internal standard and aptamer-functionalized gold nanofilms. First, two types of complementary DNA (cDNA) are fixed on the self-assembled monolayer of a halide ion-regulated nano-membrane through gold-sulfur bonds. Then, two signal probe molecules are prepared and modified. The aptamer specifically binds to cDNA, generating SERS signals. Detection of the target analytes is achieved by measuring the Raman intensity and using the internal standard method. The results show that the concentrations of thiamethoxam and dichlorodiphenyltrichloroethane (DDT) at 10 -12 M can be effectively measured under optimal experimental conditions. The Raman intensity exhibits a linear relationship at the shifts of 1085 cm -1 for 4-mercaptopyridine (4-MPY) and 1583 cm -1 and 2223 cm -1 for 4-mercaptobenzoic acid (4-MBN). When applied to the detection of thiacloprid in actual lake water samples, the results show no significant difference compared to the standard.
研究领域:
分析化学
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6562-6573
·
IF 2.993
Jia Zhengfeng,Li Haoqi,Zhao Yao,Dikin Dmitriy A.,Ni Junjie,Zhao Limin,Zhen Jinming,Ge Bo,Shao Xin,Ren Fei
In this study, copper (Cu)/polydopamine (PDA) composite was fabricated by vacuum hot-press sintering of micrometer-sized Cu particles covered with PDA film tailored at the nanometer scale thickness. The resultant compacts exhibited much higher electrical conductivity than the uncoated counterparts. Analyses of sintered samples using scanning and transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy revealed the conversion of PDA into carbonized PDA (cPDA). The increased mass density and grain growth are likely responsible for improved electrical conductivity of the composite material.
研究领域:
材料科学
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Ying Wu,Chunxia Hua,Zhongshan Liu,Jinglun Yang,Rongrong Huang,Min Li,Kaiqiang Liu,Rong Miao,Yu Fang
Although it is widely used in industry and food products, formic acid can be dangerous owing to its corrosive properties. Accurate determination of formic acid would not only benefit its qualified uses but also be an effective way to avoid corrosion or injury from inhalation, swallowing, or touching. Herein, we present a nanofilm-based fluorescent sensor for formic acid vapor detection with a wide response range, fast response speed, and high sensitivity and selectivity. The nanofilm was synthesized at a humid air/dimethyl sulfoxide (DMSO) interface through dynamic covalent condensation between two typically designed building blocks, de-tert-butyl calix[4]arene-tetrahydrazide (CATH) and 4,4′,4″,4‴-(ethene-1,1,2,2-tetrayl)tetra-benzaldehyde (ETBA). The as-prepared nanofilm is uniform, flexible, fluorescent, and photochemically stable. The thickness and fluorescence intensity of the nanofilm can be facilely adjusted by varying the concentration of the building blocks and the sensing performance of the nanofilm can be optimized accordingly. Based on the nanofilm, a fluorescent sensor with a wide response range (4.4 ppt–4400 ppm) for real-time and online detection of formic acid vapor was built. With the sensor, a trace amount (0.01%) of formic acid in petroleum ether (60–90 °C) can be detected within 3 s. Besides, fluorescence quenching of the nanofilm by formic acid vapor can be visualized. It is believed that the sensor based on the nanofilm would find real-life applications in corrosion and injury prevention from formic acid.
研究领域:
化学传感
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 22
·期 3
·944-950
·
IF 5.101
Yuan Ren,Min Chen,Linfeng Hu,Xiaosheng Fang,Limin Wu
This paper presents an oil/water interface self-assembly strategy for the fabrication of hydrophobic nanoparticles into mono- and multi-layered nanofilms with NaYF4:Yb,Er nanoplatelets as a prototype. In this approach, hydrophobic β-NaYF4:Yb,Er nanoplatelets dispersed in chloroform solvent are used as the sub-phase, then a certain amount of water is added to produce a chloroform/water interface. When ethanol is added, the up-conversion NaYF4:Yb,Er nanoplatelets are found to readily self-assemble at the oil/water interface into a closely-packed mono- or multi-layer nanofilm with a preferred [001] orientation. Compared with the previous water/oil interface self-assembly strategy, the present method is not only used for fabrication of hydrophobic nanoparticles into high quality nanofilms, but also is environmentally friendly and is safe to the operator.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Jiahang Zhou,Minqiang Xia,Lingui Hu,Yunbo Li
Herein, a novel method is presented for the in situ growth of gold nanofilms with branched structures in the presence of organosulfur. The key feature in this approach is the Rayleigh instability of ultrathin gold nanowires (AuNWs) without oleylamine (OAm), which allows the ultrathin AuNWs to decompose into gold nanoparticles (AuNPs) and the AuNPs to in situ grow into branched structures for high-performance stability and electrical conductivity. The sheet resistance of the gold nanofilms initially sharply decreased, whereas it subsequently slightly increased with the concentration of CS(NH2)2 until it exceeded the optimal range. After undergoing a 10 min heat treatment at 150 °C, the sheet resistance of the nanofilms was further reduced to 18 Ω/sq, which could be maintained for more than five months. The internal structure becomes fully grown and denser, forming a branched structure after heat treatment. Only certain organosulfurs can improve the electrical properties of the gold nanofilms, and the mechanism of organosulfur in the in situ growth of gold nanofilms with branched structures has also been presented. Overall, this novel method provides a straightforward and convenient approach to obtaining gold nanomaterials with branched structures, holding great potential promise for applications in flexible electronics, catalysis, and energy fields.
研究领域:
材料科学
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纳米技术
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
·
IF 8.328
Jianxin Liu,Rui Li,Yingyuan Hu,Tan Li,Zehui Jia,Yunfang Wang,Yawen Wang,Xiaochao Zhang,Caimei Fan
An Ag@AgCl/Ag nanofilm/ZIF-8 composite photocatalyst was successfully constructed for the first time by loading Ag@AgCl and Ag nanofilm on the surface of ZIF-8 simultaneously via a simple deposition-photoreduction method. The formed Ag nanofilm was harnessed as a mediator to transfer photo-induced electrons from the plasmonic Ag@AgCl nanostructure to ZIF-8 for enhancing the photocatalytic reaction rate with visible light. The photocatalytic activity was evaluated by photocatalytic degradation of methylene blue (MB) under visible light irradiation. The first-order kinetic constant of MB degradation over Ag@AgCl/Ag nanofilm/ZIF-8 (14.762 h −1 ) was nearly 2 times of Ag@AgCl/ZIF-8 (7.932 h −1 ). The electrochemical impedance spectra, photoelectric conversion spectra and ESR DMPO-O 2 − species spectra revealed that AFZ had a lower resistance, higher photocurrent density and more generation of superoxide radical than those of AZ, meaning that the extended interface between Ag nanofilm and ZIF-8 could promote the quick electrons transfer and electron-hole pairs separation. This work provides a new type electrons transfer mediator in fabrication of efficient plasmonic photocatalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Kun Wang,Hui Wang,Yanqun Liu,Zhiqin Li
The ability of nanofilms to mimic the natural fiber architecture and form a physical structure that is best suited for skin tissue regeneration makes it an appealing vehicle for skin tissue engineering. However, developing a facile nanofilm with both anti-bacterial and pro-angiogenic activities is yet to be addressed. Herein, two metal ions, including copper (Cu) and silicon (Si), were loaded into Wharton's jelly/polycaprolactone (WJ/PCL) system to prepare a Cu/Si@WJ/PCL nanofilm. These metal ions could impart both anti-bacterial and pro-angiogenic properties to the nanofilms, which could improve their ability in promoting wound healing. The Cu and Si ions were released continuously from the Cu/Si@WJ/PCL nanofilm, which had a nanofibrous structure and random organization. Results derived from the in vitro experiment revealed that the incubated fibroblasts could successfully survive and proliferate under lab conditions, suggesting that the Cu/Si@WJ/PCL nanofilm was cytocompatible. Additionally, the Cu ions released from the nanofilm exhibited effective antibacterial activities against both the gram-positive and gram-negative bacteria, and they acted in conjunction with the released Si ions for improving the tube formation in the human umbilical vein endothelial cells. Additionally, compared to pure WJ/PCL nanofilm and Cu or Si ion-loaded nanofilm, the Cu/Si@WJ/PCL nanofilm significantly accelerated the infected wound healing process in the rat model. The Cu/Si@WJ/PCL nanofilm showed improved epidermal development, vascularization, and collagen deposition compared to the other nanofilms. In this study, a Cu/Si@WJ/PCL nanofilm with pro-angiogenic and anti-bacterial activities was successfully developed, and it could be used as a metal-ion-based therapeutic medium for the treatment of infected wound healing.
研究领域:
生物材料学
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医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Shaojie Mo,Ang Xu,Mo Li,Zhongyang Zheng,Youwei Yan,Xinyun Wang,Heping Li
Hydrogen embrittlement in metals seriously threatens the safe and durable operation of hydrogen energy. Developing efficient and robust hydrogen barriers is a viable solution to solve this issue but remains a significant challenge. An amorphous (ErAlCrZrTi)O high-entropy nanofilm is successfully fabricated via sol-gel on steel and identified as highly efficient and robust hydrogen barrier. At 270 nm thickness, the nanofilm achieves ultra-low hydrogen permeability of 1.35 × 10 −15 mol m −1 s −1 Pa −0.5 , enhancing hydrogen resistance by 2738 times at 500 °C compared with that of bare steel. Compared to Er 2 O 3 , Al 2 O 3 , Cr 2 O 3 , and ZrO 2 , it improves hydrogen resistance by 5, 11, 26, and 90 times, respectively. Moreover, such a high hydrogen resistance can be satisfyingly retained even after the (ErAlCrZrTi)O nanofilm suffering 10 dpa irradiation. The nanofilm exhibits 37 MPa bonding strength and exceptional thermal shock resistance, attributed to the formation of Cr₂O₃ transition layer via precipitation and oxidation of Cr from the substrate during annealing. It strengthens adhesion and alleviates thermal expansion mismatch with the substrate. The mechanism for the high barrier efficiency is further revealed by this theoretical calculations. These results provide tremendous insights on the understanding and future design of high-performance hydrogen barriers for hydrogen embrittlement prevention.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Select
·
2024
·
IF 0
Zhiyu Zhang,Fei Long,Yanhong Guo,Yunxiao Liang,Jing Wang,Yong Ren
The large-sized nanofilm-constructed hierarchical porous SiO 2 (LNCHPS) is successfully prepared by the dual templating approach and subsequently used as the support for g-C 3 N 4 . A series of characterization techniques are conducted to evaluate the structure and property of the as-prepared materials. The LNCHPS possesses two sets of explicated successive pass-through macropores (0.5–1.0 µm) with large specific surface area. In addition, the macropore wall is constructed by uniform mesoporous nanofilms with the thickness ranging from 35 to 50 nm. Then, the photocatalytic property is investigated by degradations towards Rhodamine B (RhB) under simulated sunlight, in which experiments have been performed through controlling the g-C 3 N 4 loading contents, solution pH values, and photocatalyst dosages. The apparent rate constant of g-C 3 N 4 /LNCHPS could reach 0.03 min −1 under optimum conditions, showing 6.0 times that of the bulk g-C 3 N 4 . In addition, g-C 3 N 4 /LNCHPS also exhibits significantly enhanced performance in H 2 evolution (39.9 µmol h −1 ) compared to that of the bulk g-C 3 N 4 . High light absorption and utilization, enhanced adsorption capability and quick electron hole separation can render this fine structure excellent photocatalytic performance. Our work enables a facile route for large-scale preparation of g-C 3 N 4 /LNCHPS for addressing the wastewater treatment and hydrogen energy production simultaneously.
研究领域:
材料科学
·
环境科学
·
能源技术
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Ankang Xiao,Xiansong Shi,Zhe Zhang,Congcong Yin,Sen Xiong,Yong Wang
Processing two-dimensional (2D) covalent organic frameworks (COFs) into nanofilms has gained widespread attention in water treatment. However, the designed synthesis of COF-based membranes for ion separations still remains a huge challenge though the strategies to produce COF molecular separation membranes have been greatly developed. Herein, we report the construction of bi-layered COF nanofilms for efficient desalination through a simple yet effective secondary growth. The suggested strategy is capable of easily regulating the growth of another COF layer on the pre-synthesized first layer, thus producing crystalline and defect-free bi-layered COF nanofilms with distinct laminated structures. Most importantly, the offset channels are involved at the interface of two nanofilms obtained from the first and secondary growth, which leads to a constricted effective aperture that significantly enhances the ion separation performance. Specifically, the bi-layered COF nanofilms composited with macroporous supports exhibit high rejection rates (~95.8%) to Na 2 SO 4 , observably surpassing the desalination performance of single-layered COF nanofilms (rejection<10%). This work not only develops an ingenious way to fabricate COF-on-COF nanofilms with narrowed channels by tailoring the laminated structure of 2D COFs at the film interface, but also starts an avenue for the adoption of COF platforms for membrane separations with an improved precision.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2018
·
IF 0
Songmiao Liang,Zhuyuan Wang,Yan Jin,Ning Zhao,Lijie Hu,Yi Hou,Jian Xu
Designing advanced adsorption materials from molecular structure is significant to separation science and technology. We develop an intriguing strategy to prepare free-standing polyester nanofilms with enhanced polyhydroxyl architectures. The key to this strategy is to manipulate polyphenols on the surface of a thermoreversible hydrogel substrate by a synergetic application of metal–organic coordination, interfacial polymerization, and disassembly. The nanofilms with thicknesses ranging from several nanometers to hundreds of nanometers were successfully prepared and systematically analyzed. Attenuated total reflection infrared spectroscopy and ζ-potential analysis show that the polyester nanofilms have asymmetrically enhanced polyhydroxyl architectures owing to the preprotection of hydroxyl groups by the metal–organic coordination. The adsorption properties of the polyester nanofilms to a variety of metal ions were further investigated with an emphasis on clarifying its potential in water purification. Strikingly, the polyester nanofilms show exceptional properties as sorbents with high adsorption capacity and ultrafast adsorption rates to those tested metal ions. The initial adsorption rates of the polyester nanofilms to boron and lead(II) even reach 6.65 and 149.4 mg·g–1·s–1, respectively, which are 10 to 120 times higher than those of reported membranes and commercial resins. The preparation strategy reported here is universal, which could be used to develop a series of promising adsorption materials through the adoption of different polyphenols and polyamines.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）