JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2016
·Vol. 80
·期 2
·567-578
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IF 1.473
Sui Wenjie,Zhao Wenjie,Zhang Xing,Peng Shusen,Zeng Zhixiang,Xue Qunji
In this paper, we tried to fabricate a compact and thick mercapto functional silica sol–gel coating to achieve excellent corrosion resistance performance on copper. A detailed comparative study of alkylthiol self-assembled monolayers (SAMs) and mercapto functional silica sol–gel coating prepared by 1-octanethiol, n -dodecanethiol and (3-mercaptopropyl)trimethoxysilane (MPTMS) was carried out. The elements composition and chemical bonding of the protective coatings were characterized by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. In addition, the cross section morphologies of Cu–MPTMS sol–gel coating were investigated by field emission scanning electron microscopy. The wettability of various coatings was investigated by contact angle measurement instrument. Finally, the anti-corrosion ability of the coatings was characterized using an electrochemical workstation. Results demonstrated that compared to other alkylthiol SAMs, the Cu–MPTMS sol–gel coating showed the best anti-corrosion property in sodium chloride solution because it owned a multiple hierarchic Si–O–Si network structure, thus to achieve a higher range of thickness and lengthen the diffusion path way of corrosive medium. It was also found that compact and thick mercapto functional silica sol–gel coating shows better corrosion resistance performance than other SAMs of the same type.
研究领域:
材料科学
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电化学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2022
·Vol. 12
·期 9
·4771
·
IF 2.838
Zhuoqi Duan,Zaixin Xie,Bao Zhou,Xiaobo Yang,Heng-Yong Nie,Yongmao Hu
Heritage buildings and monuments are mostly made from natural stone, which undergoes irreversible decay under outdoor conditions. The main reason for the contamination, degradation, and cracking of natural stones is water and oil permeation. Hence, modifications on stones rendering their surface self-cleaning are effective for stone protection. Reported in this paper is the development of a bionic approach to enabling self-cleaning stone surface via growing self-assembled polydopamine (PDA) as the adhesive layer on the stone surface, followed by depositing Al2O3nanoparticles derivatized by self-assembled monolayers of a fluorophosphonic acid (FPA). This approach ensured a robust surface modification that realized superhydrophobicity, as demonstrated on natural marbles, Hedishi, and Qingshi. The surface modification was thermally stable up to 400 °C.Keywords:self-cleaning stones;surface modification;polydopamine coatings;fluorophosphonic acid (FPA);self-assembled monolayers (SAMs);SAM-derivatized alumina particles;micro- and nanostructures
研究领域:
材料科学
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表面化学
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纳米技术
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文化遗产保护
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Materials
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2021
·
IF 14.593
Lijing Hao,Tianjie Li,Lin Wang,Xuetao Shi,Yan Fan,Chang Du,Yingjun Wang
Fibronectin (Fn) is significant to the performance of biomaterials, and the chemistry of biomaterial surface play important roles in Fn adsorption and subsequent cell behavior. However, the “molecular scale” mechanism is still unclear. Herein, we combined experimental strategies with molecular simulations to solve this problem. We prepared self-assembled monolayers with varying chemistries, i.e., SAMs-CH 3 , SAMs-NH 2 , SAMs-COOH and SAMs-OH, and characterized Fn adsorption and cell behaviors on them. Next, Monte Carlo method and all-atom molecular dynamics simulations were employed to reveal the orientation/conformation of Fn on surfaces. We found that SAMs-CH 3 strongly adsorbed Fn via hydrophobic interactions, but show poor bioactivity as the low exposure of RGD/PHSRN motifs and the deformation of Fn. SAMs-NH 2 and SAMs-COOH could adsorb Fn efficiently via vdW interactions, electrostatic interactions, hydrogen bonds and salt bridges. Fn exhibited excellent bioactivity for cell adhesion, proliferation and osteogenic differentiation as high exposure of bioactive motifs on SAMs-NH 2 , or as the activation of other inferior cell-binding motifs on SAMs-COOH. SAMs-OH showed poor Fn adsorption as the water film. However, the adsorbed Fn displayed non-negligible bioactivity due to high exposure of PHSRN motif and large degree of protein flexibility. We believe that the revealed mechanism presents great potential to rationally design Fn-activating biomaterials.
研究领域:
生物材料
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分子生物学
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细胞生物学
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表面化学
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生物物理学
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jiazhen Wei,Qingshun Dong,Mingzhu Pei,Hongru Ma,Yaling Han,Shiqi Rong,Zhiyong Wang,Zheng Lv,Zicheng Liu,Siao Li,Yuzhong Chen,Wenzhe Shang,Wenqi Han,Jie Zhang,Yuan Qin,Hao Xian,Mingyan Wu,Wei Liu,Wenming Tian,Shengye Jin,Yantao Shi
Self-assembled molecules (SAMs) have served as a pivotal interfacial engineering enabler for advancing the performance of perovskite solar cells. However, the spontaneous aggregation of SAMs leads to uneven deposition, particularly in the fabrication of large-area perovskite solar modules (PSMs) by blade-coating. Here, a co-adsorption strategy utilizing 3-amino-1-propanesulfonic acid (3NS) is proposed as a blade-coating-compatible strategy to achieve a uniform SAMs anchoring across a 10 × 10 cm 2 substrate. Acting as a co-adsorbate with SAMs, 3NS leverages synergistic multiple intermolecular interactions—such as electrostatic forces, hydrogen bonding, and cation-π interactions—to effectively disrupt the aggregation of SAMs, enabling their high-density anchoring on NiO x substrate. Meanwhile, the 3NS-SAMs co-adsorption layer system optimizes interfacial energy level alignment and passivates defects. By virtue of this co-adsorption strategy, the PSM achieves a champion power conversion efficiency (PCE) of 20.16% (active area: 63.09 cm 2 ). Moreover, the modules retain 87.64% and 72.70% of their initial PCE after 1100 h of ambient aging and 264 h of continuous thermal aging at 80 °C, respectively. This work presents a scalable blade-coating-compatible strategy for controlling the deposition of SAMs, advancing the development of high-performance PSMs.
研究领域:
材料科学
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纳米技术
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可再生能源
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表面工程
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薄膜太阳能电池
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）