JOURNAL OF SOLID STATE CHEMISTRY
·
2019
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IF 2.291
Yiling Zhu,Rui Zhu,Jun Xie,Qiuliang Wang,Hu Chen,Yunfei Liu,Yinong Lyu
A novel PS@CdTe multilayers fluorescence microsphere was successfully synthesized by the electrostatic layer-by-layer (LBL) self-assembly technique. The structure, the process of self-assembly and the fluorescence performance were confirmed by high-resolution transmission electron microscope (HRTEM), Zeta potentiometric analyzer and fluorescence spectrophotometer, respectively. The results manifest that when the pH of buffer solution is 7.8, the negative charge on the surface of CdTe quantum dots (QDs) is the largest, which is beneficial to the synthesis of electrostatic self-assembled microspheres. The fluorescence properties of PS@CdTe microspheres increased gradually with the number of layers coated increased, and the optimum number of coating layers is three. Under this condition, the PS@CdTe microspheres exhibited a great increase of 25-fold in fluorescence performance compared to the equal quantity of pure CdTe QDs. Moreover, the emission spectra of PS@CdTe microspheres recorded under the excitation of 410 nm, and shows a strong emission peak located at 524 nm. This kind of core-shell microspheres has a great potential to be used in the field of optoelectronics .
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 12
·4570
·
IF 4.6
Hongyang Song,Lei Xing,Jinjian Wei,Xue Wang,Yaozhen Yang,Pengbo Zhe,Mingming Luan,Jing Xu
Titanium (Ti) and its alloys are widely used in medical treatment, engineering, and other fields because of their excellent properties including biological activity, an elastic modulus similar to that of human bones, and corrosion resistance. However, there are still many defects in the surface properties of Ti in practical applications. For example, the biocompatibility of Ti with bone tissue can be greatly reduced in implants due to a lack of osseointegration as well as antibacterial properties, which may lead to osseointegration failure. To address these problems and to take advantage of the amphoteric polyelectrolyte properties of gelatin, a thin layer of gelatin was prepared by electrostatic self-assembly technology. Diepoxide quaternary ammonium salt (DEQAS) and maleopimaric acid quaternary ammonium salt (MPA−N+) were then synthesized and grafted onto the thin layer. The cell adhesion and migration experiments demonstrated that the coating has excellent biocompatibility, and those grafted with MPA−N+promoted cell migration. The bacteriostatic experiment showed that the mixed grafting with two ammonium salts had excellent bacteriostatic performance againstEscherichia coliandStaphylococcus aureus, with bacteriostasis rates of 98.1 ± 1.0% and 99.2 ± 0.5%, respectively.Keywords:Ti;osseointegration;antibacterial;electrostatic self-assembly technology
研究领域:
生物材料学
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医学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Shijie Wang,Dongdong Jin,Ye Bian,Rutao Wang,Li Zhang
Conversion-type magnetite shrewdly shows abundance, nontoxicity, and high lithium storage capacity. However, either pristine magnetite or nanocomposites with two-dimensional materials cannot prevent restacking, pulverization, and poor structural homogeneity simultaneously because of a lack of universal interfacial interactions. Here, an electrostatic self-assembly strategy is uncovered between hollow Fe3O4/C microspheres (with H+-induced quasi-intrinsic positive charge) and few-layer MXenes (with intrinsic negative charge from terminating functionalities). This strategy realizes the uniform and interconnected architecture of Fe3O4/C@MXene that favors fast Li+ diffusion, easy electron/charge transfer, and suppressed pulverization. Specifically, after the long-term cycling, an undegraded specific capacity of 907 mA h g–1 remains at 0.5 A g–1. Further adoption of such superior anode in 4.0 V lithium-ion capacitors results in a high energy density of 130 W h kg–1, a maximum power density of 25,000 W kg–1, and excellent cycling stability. This work thus sheds light on a generic self-assembly process where intrinsic electrostatic interaction plays an essential role.
研究领域:
材料科学
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能源存储
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2024
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IF 6.4
Xin Hou,Penggang Ren,Wenhui Tian,Runzhuo Xue,Wu Tong,Zhengyan Chen,Fang Ren,Yanling Jin
Carbon materials have become a focal point in supercapacitors (SCs) due to their perfect charge–discharge behavior, relatively low cost, and excellent electrochemical stability, but the limited electrochemical activity restricts their further development. MXenes (Ti 3 C 2 T x ) combine high electrical conductivity, hydrophilicity, and abundance surface functional groups, which contribute to high energy density when compounded with carbon materials. In this work, carbon material derived from mineral water bottles is modified with cetyltrimethylammonium bromide (CTAB) that spontaneously forms into porous heterogeneous structures with Ti 3 C 2 T x under electrostatic interactions. The carbon material hinders the reaggregation of Ti 3 C 2 T x , while Ti 3 C 2 T x increases the electrochemical activity on the surface of the carbon material. A hierarchical porous carbon with a large specific surface area of 1754.3 m 2 g −1 , promoting the electrolyte migration kinetics and high specific capacitance in 6 m KOH electrolyte (404.1 F g −1 at 1 A g −1 ). The symmetric SC made as-prepared carbon electrode shows an extended voltage window (1.8 V), an optimal energy density (31.19 Wh kg −1 at a power density of 450 W kg −1 ) and a low capacitance decay (1% after 15 000 cycles) in 1.5 m Na 2 SO 4 . The preparation of electrode material with a unique structure provides a practical and innovative strategy for the value-added utilization of waste plastics.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Zhaobo Fan,Xiaojie Zhang,Youji Li,Xin Guo,Zhiliang Jin
Hydrogen evolution of inorganic photocatalysts is currently a hot research topic. In order to prepare highly efficient catalysts for hydrogen evolution, p-n type heterojunctions were successfully constructed by closely combining p-type Cu 2 O and n-type NiCo-LDH with opposite electrical properties by a simple electrostatic self-assembly. In addition, because the positions of the two single catalysts NiCo-LDH and Cu 2 O Fermi levels are dissimilar from those of traditional p-n heterojunctions, the extremely high movement of Fermi levels forms a strong built-in electric field, which powerfully prevents the gradient diffusion of charge and facilitates the migration of intrinsic photocarriers. Furthermore, the flower cluster NiCo-LDH is composed of two-dimensional thin sheet structure, which has a large specific surface area and can prevent Cu 2 O agglomeration. Under the condition of using triethanolamine solution and eosin Y (EY) respectively as sacrifice reagent reducing agent and photosensitizer, the composite catalyst has reached 18332 μmol·g −1 in 5 h, which was increased by 8.5 times compared to the pure Cu 2 O. This research provides an innovative strategy to construct a heterojunction between a metal double-layer hydroxide and a non-noble metal oxide to realize an effective photocatalytic hydrogen production .
研究领域:
材料科学
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能源化学
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DOI
高影响因子
CATALYSIS LETTERS
·
2023
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IF 2.8
Liu Xinyu,Xu Jing,Li Faqin,Liu Zhenlu,Xu Shengming
With the increasing scarcity of resources, the search for green and available energy has become an urgent need. Among them, photocatalytic decomposition of water to hydrogen production has been widely studied. According to zeta potential and XRD characterization, NiCo2O4 and CuS were successfully reassembled by electrostatic self-assembly to construct S-scheme heterojunction induced by built-in electric site, which can accelerate the reaction. At the same time, under simulated visible light irradiation, the composite catalyst can rapidly decompose aqueous triethanolamine solution to produce hydrogen. The composite catalyst has high photocatalytic activity and shows a durable and efficient hydrogen generation effect. By studying the photogenerated carrier separation and transfer of the catalyst, the results show that the composite catalyst can accelerate the photogenerated carrier separation and transfer, so that it can participate in the photocatalytic reaction faster. It provides various insights into the construction of different heterojunctions in binary composite catalysts. Graphical Abstract
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2022
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IF 4.855
Zhen Li,Xuan Chen,Xin Chen,Jianqiang Guo,Lin Liu,Guocheng Zhu,Jiri Militky,Juming Yao
Flexible, wearable pressure sensors have been widely studied in the fields of motion detection, health management, and human–computer interaction. However, the unsatisfactory stability and durability limit its application, due to the weak interface interaction between the flexible substrate and conductive layer. Herein, we design a wearable pressure sensor with good sensitivity and stability by integrating a conductive cellulose/exfoliated graphene (CEG) ink with polyethylenimine-modified cotton fabrics (PEI-CFs). The negatively charged graphene was obtained via liquid-phase exfoliation of graphite in a sustainable cellulose solution. The pressure sensor was prepared by an electrostatic self-assembly process in which negatively charged CEG is adsorbed to the positively charged PEI-CFs. In this strategy, CEG ink combines firmly with the PEI-CF substrate, endowing the as-prepared pressure sensor with stable sensing performance and long-term stability. Due to these advantages, it can be used for human health monitoring, such as human motion, breathing, and microexpression. This work provides a simple and feasible route for the development of stable, durable, and high-performance wearable electronics.
研究领域:
材料科学
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电子工程
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生物医学工程
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DOI
高影响因子
Biosensors-Basel
·
2025
·Vol. 15
·期 7
·426
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IF 5.6
Kai Hua,Liang Li,Pei Liang
MXenes are a class of two-dimensional materials exhibiting excellent surface-enhanced Raman scattering (SERS) performance. Currently, the SERS studies of MXenes have been primarily focused on those with M2X and M3X2structural motifs. In order to expand the SERS sensing application based on MXenes, in this paper, a SERS sensor made of Ta4C3@AgNP nanocomposite material was fabricated by electrostatic self-assembly. Tests such as different concentrations of R6G probe molecules showed that the minimum detection limit of this SERS sensor was 10−8M, demonstrating excellent sensitivity. When different test areas are selected, the relative error of intensity under the same wave number is less than 10.7%, showing good repeatability and consistency. Furthermore, the Ta4C3@AgNP nanocomposite SERS sensor was used to detect the pesticide Ziram, and a quantitative model was established. Application detection indicates that this sensor has good sensitivity for the pesticide Ziram, and the minimum detection limit was 10−6M, which exceeded national standard requirements. The findings of this study have potential application value in the fields of food safety and environmental protection.
研究领域:
分析化学
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材料科学
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食品安全
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环境监测
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Xie Li,Yuzhao Yang,Dongdong Tang,Yuan Liu,Qi Wang
Flameproof modification of paper can improve safety and application performance. However, traditional paper is prone to moisture absorption, resulting in significant reduction in flame retardant performance, even complete failure, greatly limiting the application environment. In order to achieve long-term flame retardant properties of paper, while avoiding the loss of physical properties caused by the introduction of flame retardants, in this work, a plant acid/phosphate and melamine formaldehyde coating (PyA/PA-MF) is prepared through electrostatic self-assembly for durable flame retardant performance of cellulose paper. Due to the electrostatic interaction, the paper surface become greatly rough with introduction of PyA/PA-MF, a uniform microsphere structure is formed on the surface of the paper cellulose, which effectively fix the phosphorus-containing groups. The oxygen index reaches 33 % and the carbon length was only 6.3 ± 0.2 cm, the pHRR and THR are decreased by 80 % and 73 %, respectively. After being immersed for 72 h, the oxygen index is still 31.4 % and carbon length is no more than 12 cm. mechanical property of modified paper is significant increased in the tensile strength (2.4 MPa) compared to the blank paper (1 MPa), as well as that the whiteness of the surface of the modified paper will not change. In summary, PyA/PA-MF endows paper long-term flame retardant performance while maintaining its basic performance.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Coatings
·
2024
·Vol. 14
·期 9
·1210
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IF 2.9
Songjia Kong,Chenguang Liu,Jiawei Ren,Tianchang Wang,Xianwei Geng,Yudan Yuan,Chun Zhao,Cezhou Zhao,Li Yang
Silicon is a promising anode material for high-performance lithium-ion batteries (LIBs), but its rapid capacity degradation has significantly hindered its large-scale application. In this study, we propose an in situ self-assembly polymerization method to fabricate a stable silicon-based anode by leveraging electrostatic self-assembly technology, in situ esterification, and amidation reactions. The incorporation of a cross-linked polymer, combined with the synergistic effects of electrostatic interactions between negatively charged MXene and positively charged silane-coupling-agent-modified silicon, offers a novel strategy for enhancing the electrochemical performance of LIBs. Notably, annealed electrodes with a 65 wt% nmSi-NH2/MXene ratio demonstrate outstanding electrochemical performance, achieving a capacity of 929.5 mAh g⁻¹ at a current density of 1 A g⁻¹ after 100 charge/discharge cycles. These findings suggest that the integration of cross-linked polymers and electrostatic self-assembly can significantly improve the intercalation and overall electrochemical performance of silicon anodes in lithium-ion batteries.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rui Wang,Song Liu,Feng-shou Sun,Xin Yu,Xiao Liu,Bei-xing Li,Wei Mu,Da-xia Zhang,Feng Liu
The development of microencapsulation is currently blocked by the mismatch between the release rate and pest-control demand in terms of improving the photostability of pesticides. Achieving both long-term stability and quick release of pesticides through the use of microcapsules (MCs) is an effective way to increase pesticide efficiency. Sodium lignosulfonate and four types of polyalkyl quaternary ammonium salts (PQAS) were used as shell materials in the fabrication of four types of microcapsules by electrostatic self-assembly. The effects of the PQAS alkyl chain length on the morphology, zeta potential, molecular electrostatic potential, particle size distribution , encapsulation efficiency, release behaviour, anti-photolysis performance, and field application effects of the MCs were investigated. The four types of MCs were spherical and 0.5–3 μm in size, and they had an encapsulation efficiency of more than 75 %. The X-ray diffraction results showed that the longer the alkyl chain of PQAS was, the looser the material formed by electrostatic attraction was. With the increase of the alkyl chain length of PQAS, the MCs shell was looser and easier to deform, leading to rapid nuclear release. Therefore, the MCs shells were looser and more prone to deformation with increasing PQAS alkyl chain length, resulting in the quick release of the core. This quick release of the core to the bottom of the microcapsules and the loose shell formed a double-layer structure, which effectively prevented ultraviolet degradation. Therefore, abamectin MCs with quick-release and favourable anti-photolysis performances showed advantages in controlling Plutella. xylostella and Pieris. rapae insect pests . Octadecyl dimethyl benzyl ammonium chloride can be used to fabricate loose MCs by electrostatic self-assembly, which achieves both rapid and long-term pest control.
研究领域:
农业科学
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材料科学
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产品关联
DOI
高影响因子
Biofabrication
·
2013
·Vol. 5
·期 3
·035004
·
IF 3.705
Yu Long Han,Yanshen Yang,Shaobao Liu,Jinhui Wu,Yongmei Chen,Tian Jian Lu,Feng Xu
The unique benefit of electrostatic self-assembly of microscale components in solution is demonstrated for the first time. In particular, positive and negative treatment of poly(ethylene glycol) (PEG) facilitates a novel bottom-up assembly approach using electrostatic interaction from microgels with opposite charges. Fundamental investigations of electrostatic interaction of microgels reveal that the contact area of microgels determines the total energy of construct and thus the final patterns. The electrostatic self-assembly approach enables the fabrication of large and complex biological related structures (e.g., multi-layer spheroid) with accurate control. By the design of the microgels, the thickness and number of microgels in each layer can be controlled. Biological investigations of positive and negative treatments of PEG further prove the possibility of using this approach in tissue engineering, regenerative medicine and drug delivery.
研究领域:
生物材料学
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再生医学
·
药物递送
✓ 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）