Materials
·
2024
·Vol. 17
·期 11
·2717
·
IF 3.1
Yuxing Ye,Hui Jin,Meng Zhao,Fengying Xu,Zhuo Jiang
The present research investigated the voltage polarity asymmetry phenomenon based on dielectric wetting. In an ITO–hydrophobic layer–droplet setup, three reagents with different pH values (3.96, 7.0, and 10.18), two types of hydrophobic materials (AF1601 and 6%T6), and two different thicknesses (340 nm and 2.5 μm) of each material were systematically investigated. The results show that the thickness of the hydrophobic dielectric layer and the pH of the droplets had a significant impact on the droplet contact angle variation with the voltage. The contact angle on the thick hydrophobic dielectric layer followed the Lippmann–Young equation as the voltage changed. The angle of the thin hydrophobic dielectric layer was affected by its own properties and the type of droplet, which led to the occurrence of voltage polarity asymmetry of the electrowetting phenomenon. After further investigation of this phenomenon, it was found that it mainly accounted for the decrease in electric field strength at both ends of the droplet, which was caused by electrochemical reactions and changes in circuit resistance. The leakage current is an important indicator, and this phenomenon can be prevented by increasing the thickness of the hydrophobic dielectric layer.
研究领域:
物理学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Lichen Gou,Ling Li,Siqi Wei,Yunfei Tian,Xiandeng Hou,Li Wu
Herein, the surface-enhanced Raman scattering (SERS) platform was combined with an azo coupling reaction and an aluminum alloy covered with a hydrophobic layer of praseodymium oxide and stearic acid complexes for the detection of histamine. The praseodymium oxide on aluminum alloy was successfully synthesized by the rare-earth-salt-solution boiling bath method and modified by stearic acid. Its surface exhibits a water contact angle (WCA) of 125.0°. Through the azo derivatization reaction with 3-amino-5-mercapto-1,2,4-triazole (AMTA) diazonium salts, histamine can be converted into the derivatization product with higher Raman activity. The mixture of the derivatization product and β-cyclodextrin-modified Ag nanoparticles (β-CD-AgNPs) were dropped onto the surface of an aluminum alloy covered with a hydrophobic layer of praseodymium oxide and stearic acid complexes, and dried for SERS measurement. The intensity ratio between the SERS peaks at 1246 cm −1 and 1104 cm −1 (I 1246 /I 1104 ) of the derivatization product was used for the quantification of histamine. Under the selected conditions, the limit of detection (LOD) and the limit of quantification (LOQ) for this method were 7.2 nM (S/N = 3) and 24 nM (S/N = 10), respectively. The relative standard deviation (RSD) of this method for the determination of 1 μM histamine was 6.1 % (n = 20). The method was also successfully used for the determination of histamine in fish samples with recoveries ranging from 92 % to 111 %. The present method is simple, sensitive, reliable, and may provide a new approach for preparing the composite hydrophobic layer that can enhance SERS signals through hydrophobic condensation effect. Meanwhile, it may have a promising future in the determination of small molecular compounds containing an imidazole ring.
研究领域:
分析化学
·
食品科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Zhi-Xian Yang,Li-Chao Jing,Xianbing Ming,Wen-Hao Geng,Weiwei Cao,Yunhua Tian,Peng-Shuai Bin,Ze-Long Bao,Ru-Yu Chang,Hong-Zhang Geng
The preparation of superhydrophobic layers and their research in various fields has always been a hot topic. In this work, we designed a fluffy micro-nano structure model of Zinc oxide (ZnO) to investigate their superhydrophobic properties furtherly. A simple and easily achievable preparation method of superhydrophobic coatings was proposed: The ZnO/polydimethylsiloxane (PDMS) layer was prepared by strictly controlling the ratio of ZnO to PDMS. Based on this, the staggered-growth ZnO rods were prepared on the substrate surface by hydrothermal method . These ZnO rods are structured with micrometer lengths and nanometer diameters, and they form a fluffy ZnO layer on the original coating surface . After being modified by 1H,1H,2H,2H-perfluorooctyltriethoxysilane, the coating possessed excellent superhydrophobic properties with a contact angle of 161° After growing ZnO rods on the surface, the surface roughness was reduced from 326 nm to 181 nm. The superhydrophobic coating has excellent self-cleaning properties, high resistance to acid and alkali corrosion, and superhydrophobic properties against various common liquids. Even after exposure to air for up to 6 months, the contact angle of the superhydrophobic coating can remain above 153° This study provides an excellent idea for future research on superhydrophobic coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Jianfei Yao,Fang Dong,Hua Feng,Zhicheng Tang
To improve the water-resistance under rich moisture condition of the monolithic Co 3 O 4 /NF (Ni-Foam) catalyst for VOCs catalytic combustion, a hydrophobic coating was carefully designed on the monolithic Co 3 O 4 /NF catalyst surface. Through the modulation of the thickness of hydrophobic layer with PhTES (phenyltriethoxysilane), we observed that the thickness of hydrophobic layer on these Co 3 O 4 /NF-x%Ph catalysts could greatly affect its activity in the wet conditions. More importantly, it is confirmed that the construction of the superhydrophobic surface derived from PhTES hugely inhibited the conformation of hydroxyl groups (OH) on the monolithic Co 3 O 4 /NF catalyst, which effectively restrained the adsorption of moisture on monolithic Co 3 O 4 /NF catalyst. Thus, the catalytic activity of toluene under wet condition was improved. In addition, this work also provided new ideas and experimental accumulation for future industrial applications of Co-based catalysts. In addition, in-situ DRIFTS results verified that the construction of hydrophobic layer greatly inhibited the adsorption of water molecules on the surface of the Co 3 O 4 /NF-25%Ph catalyst.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
·
2016
·
IF 3.433
Dong Wang,Kaiwen Guan,Zhiping Bai,Fuqiang Liu
A new facile coating strategy based on the hydrophobicity of methyl groups was developed to prevent nano-sized magnetite particles from strong acid corrosion. In this method, three steps of hydrolysis led to three layers of protection shell coating Fe3O4 nanoparticles. Filled with hydrophobic methyl groups, the middle layer mainly prevented the magnetic core from strong acid corrosion. These magnetite particles managed to resist 1 M HCl solution and 2.5 M H2SO4 solution. The acid resistant ability was higher than those reported previously. After further modification with amino-methylene-phosphonic groups, these magnetite particles successfully adsorbed Sb(III) in strong acid solution. This new strategy can also be applied to protect other materials from strong acid corrosion.
研究领域:
环境化学
·
材料科学
·
纳米技术
·
污染控制
·
吸附材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Xiuping Sun,Guifang Pan,Haiqiang Qi,Zhirong Sun
The nickel ions (Ni 2+ ) leaching is a crucial issue that must be considered when using nickel-foam (NF) as the electrode material . Here, the NF composite cathode (CNTs-nafion/NF/PTFE) was fabricated by the facile dip-coating process for the atenolol (ATL) elimination in electro-Fenton (EF) system. The preparation conditions and experimental variables were investigated and optimized. The introduction of PTFE hydrophobic layer not only greatly enhanced H 2 O 2 electro-generation, but also effectively controlled the Ni 2+ leaching under the acidic condition (pH = 3). Remarkably, CNTs-nafion/NF/PTFE exhibited a comparatively excellent stability and low Ni 2+ leaching amount (0.035 ppm) after six consecutive cycles. And the composite cathode showed favorable performance in 20 mg L − 1 ATL degradation using 0.4 mM Fe 2+ under current density 9 mA cm − 2 and initial pH 3.0, achieving 100% degradation efficiency within 30 min and 41.7% TOC removal rate within 120 min. Further, it was confirmed that hydroxyl radicals ( OH) and superoxide anions ( O 2 ) were considered to be active substances in the EF system, and OH played the predominant role. Also, the reasonable degradation mechanism and reaction pathways of ATL in the EF process were proposed. Overall, the facile preparation procedure and the lower Ni 2+ leaching amount make the NF composite cathode a practicable alternative to carbonaceous materials in the EF system.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2022
·Vol. 10
·期 9
·1738
·
IF 3.352
Jingjing Liu,Juanli Shi,Bo Zhang,Zhenmin Cheng
Three novel magnetically-recoverable solid acid catalysts (hydrophobic catalysts Fe3O4@SiO2-Me&PrSO3H, Fe3O4@SiO2-Oc&PrSO3H and hydrophilic catalyst Fe3O4@SiO2-PrSO3H) were synthesized by introducing organic propylsulfonic acid and alkyl groups to Fe3O4@SiO2nanocomposites. We characterized these catalysts by FT-IR, EDS, XRD, VSM and SEM, and found that they had excellent core-shell structure and magnetic responsiveness. We also explored the impact of surface hydrophobicity on activity and stability of catalysts in ethyl acetate (EAC) synthesis reaction. The results indicated that: for reactivity and reusability, Fe3O4@SiO2-Oc&PrSO3H > Fe3O4@SiO2-Me&PrSO3H > Fe3O4@SiO2-PrSO3H. This was because octyl and methyl groups could build a hydrophobic layer on the surfaces of Fe3O4@SiO2-Oc&PrSO3H and Fe3O4@SiO2-Me&PrSO3H, and this could effectively prevent water molecules from poisoning active sites; the hydrophobicity of octyl was stronger than methyl. Fe3O4@SiO2-Oc&PrSO3H also showed higher catalytic activity in the external aqueous reaction system, which indicated that it had good water toleration. Moreover, we could easily separate Fe3O4@SiO2-Oc&PrSO3H from the reaction mixture with an external magnetic field, in the meanwhile, its reactivity could still remain above 80% after reusing 6 times.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
Acta Biomaterialia
·
2024
·
IF 9.4
Hang Xu,Yufeng Zhang,Jinzhu Ma,Hui Miao,Shangliang Chen,Shangdong Gao,Hui Rong,Liandong Deng,Jianhua Zhang,Anjie Dong,Shuangyang Li
Bacterial infection poses a significant impediment in wound healing, necessitating the development of dressings with intrinsic antimicrobial properties. In this study, a multilayered wound dressing (STPU@MTAI 2 /AM 1 ) was reported, comprising a surface-superhydrophobic treated polyurethane (STPU) sponge scaffold coupled with an antimicrobial hydrogel. A superhydrophobic protective outer layer was established on the hydrophilic PU sponge through the application of fluorinated zinc oxide nanoparticles (F-ZnO NPs), thereby resistance to environmental contamination and bacterial invasion. The adhesive and antimicrobial inner layer was an attached hydrogel (MTAI 2 /AM 1 ) synthesized through the copolymerization of N -[2-(methacryloyloxy)ethyl]- N, N, N -trimethylammonium iodide and acrylamide, exhibits potent adherence to dermal surfaces and broad-spectrum antimicrobial actions against resilient bacterial strains and biofilm formation. STPU@MTAI 2 /AM 1 maintained breathability and flexibility, ensuring comfort and conformity to the wound site. Biocompatibility of the multilayered dressing was demonstrated through hemocompatibility and cytocompatibility studies. The multilayered wound dressing has demonstrated the ability to promote wound healing when addressing MRSA-infected wounds. The hydrogel layer demonstrates no secondary damage when peeled off compared to commercial polyurethane sponge dressing. The STPU@MTAI 2 /AM 1 -treated wounds were nearly completely healed by day 14, with an average wound area of 12.2% ± 4.3%, significantly lower than other groups. Furthermore, the expression of CD31 was significantly higher in the STPU@MTAI 2 /AM 1 group compared to other groups, promoting angiogenesis in the wound and thereby contributing to wound healing. Therefore, the prepared multilayered wound dressing presents a promising therapeutic candidate for the management of infected wounds. Statement of significance Healing of chronic wounds requires avoidance of biofouling and bacterial infection. However developing a wound dressing which is both anti-biofouling and antimicrobial is a challenge. A multilayered wound dressing with multifunction was developed. Its outer layer was designed to be superhydrophobic and thus anti-biofouling, and its inner layer was broad-spectrum antimicrobial and could inhibit biofilm formation. The multilayered wound dressing with adhesive property could easily be removed from the wound surface preventing the cause of secondary damage. The multilayered wound dressing has demonstrated good abilities to promote MRSA-infected wound healing and presents a viable treatment for MRSA-infected wound.
研究领域:
材料科学
·
生物医学工程
·
伤口护理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SusMat
·
2025
·
IF 21.3
Kun Wang,Sihong Yue,Tianxiang Li,Yu Tong,Jingyuan Tian,Yali Chen,Ziyong Kang,Feng Yang,Hongqiang Wang
Inorganic lead halide perovskites, especially CsPbI 3 , have witnessed significant progress in photovoltaic field due to their outstanding optoelectronic properties and high thermal stability. However, high-performance inorganic perovskite solar cells (IPSCs) are generally realized by strictly controlling the environmental humidity (mostly lower than 40%) during fabrication, which is undesirable for reducing fabrication cost and promoting further industrial production. Herein, a synergistic in situ hydrolysis polymerization strategy through 3,3,3-(trifluoropropyl)trichlorosilane (TFCS) and (3-2-aminoethylamino)propyltrimethoxysilane (AEMS) treatment is reported to prevent water invasion and realize efficient CsPbI 3 IPSCs in highly humid air. TFCS not only regulates the crystallization process via hydrolysis reaction, but also stabilizes the phase structure by passivating the defects and producing a hydrophobic protection layer. Additionally, TFCS facilitates in situ polymerization of upper layer AEMS, thus promoting further enhanced protection of perovskites against ambient moisture. As a result, the CsPbI 3 IPSCs fabricated at 45% humidity exhibit a dramatically improved efficiency of 20.09%, representing a record value for the inverted IPSCs fabricated in air with humidity over 40%. Moreover, the environmental humidity window for device fabrication can be broadened to 60%. This work provides an effective approach to stabilizing air-processed CsPbI 3 and favoring the practical industrial manufacture to further boost their cost-effective applications.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
化学工程
·
固态电子学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2025
·
IF 9.7
Yang Yaqiong,Lv Tian-Run,Xue Yi-Han,Yin Zhigang,Yin Ming-Jie,An Quan-Fu
Real-time monitoring of ion content variations in humans offers a noninvasive approach to ensuring health, made possible through wearable sensors. However, challenges such as the low capacitance of the solid-contact (SC) layer and the formation of a water layer hinder the low-concentration ion detection and stable performance of these sensors. To address these limitations, a novel design is proposed using graphene quantum dots (GQD)-doped polypyrrole (PPy) nano-dendritic membranes, combined with a hydrophobic Nafion membrane, for sweat ion sensors. The GQD-doped PPy membrane serves as the SC layer, where GQD enhance capacitance and the nano-dendritic structure improves ion-to-electron transduction efficiency. Meanwhile, the hydrophobic Nafion membrane prevents water layer formation, stabilizing the sensor’s performance. This design significantly improves both the sensitivity (from 49 mV/decade to 70 mV/decade) and stability (potential drift decreasing from 1.3 mV/h to 18.7 μV/h) of the sensor. Leveraging this configuration, Na + and K + sensors are integrated onto a flexible electrode using a dispense-coupled inkjet printing technique. This enables real-time, continuous monitoring of Na + and K + concentrations in human sweat simultaneously. The proposed sensing device demonstrates strong potential for noninvasive sweat monitoring, contributing to enhanced health management in daily life.
研究领域:
生物传感器
·
可穿戴电子设备
·
纳米技术
·
生物医学工程
·
健康监测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
J. Li,L.X. Chen,X. Li,C.C. Zhang,F.L. Zeng
In this study, a facile and effective surface hydrophobic layer protected selective etching strategy has been adopted to fabricate organic functionalized hollow silica nanospheres (OHSNSs). Our experiments demonstrated that the morphology and structure of OHSNSs were greatly affected by the types of organosilanes and concentrations of cetyltrimethylammonium bromide (CTAB) as pore-making agent. At low concentration of CTAB (1.9 mg/mL −1 ), it was found that the protective effect of the hydrophobic layer of 3-thiocyanatopropyltriethoxysilane (TCPTES) was so strong that can be endured long time etching (8 h), leading to the formation of hollow core and organic porous shell structure. And yet, the protective effect of the hydrophobic layer of vinyltriethoxysilane (VTES) was too weak to withstand alkali etching, resulting in preferentially etched of the outer vinyl protection shell. Whereas, at a higher concentration of CTAB (2.5 mg/mL −1 ), for TCPTES, the irregular and capsules-like spheres were obtained. In contrast, for VTES, porous core/solid shell structures with shell thickness of 16 nm were generated. In addition, no particles were observed when the CTAB concentration was above 2.5 mg/mL −1 .
研究领域:
纳米技术
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhongke Su,Jie Ren,Su Chen,Chang Liu,Guo-Xing Li
The application of solar interfacial evaporation technology in clean water production has garnered increasing attention in recent years, with thin-film evaporation being considered one of the most efficacious strategies to address the growing demand for high evaporation rates at moderate temperatures. This investigation presents the design of a Janus nanofiber film based on a self-pumping effect, comprising a hydrophobic layer (TPU) and a hydrophilic layer (PVA-(ε-PL)@MXene). This structure creates a self-pumping effect that promotes unidirectional transfer of liquids, effectively increasing water transfer efficiency and evaporation, achieving a maximum evaporation rate of 1.56 kg m–2 h–1 while maintaining 1.52 kg m–2 h–1 after multiple cycles. This Janus nanofiber film exhibits high performance in the 200–2500 nm range, demonstrating strong light absorption with an absorption efficiency of 87.69%, and rapidly increasing from room temperature to 57.8 °C in 3 min under 1 kW m–2. Furthermore, TPU/PVA-(ε-PL)@MXene exhibited substantial antimicrobial activity against E. coli (89.77%) and S. aureus (53.96%), attributed to the inhibitory effect of ε-PL on the biosynthesis of proteins and enzymatic biomolecules.
研究领域:
可再生能源
·
材料科学
·
纳米技术
·
水处理
·
太阳能技术
·
高分子科学
✓ 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）