一个稳定的脂质/TiO2接口与头组倒置的胆和与SiO2的比较
1Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.
Journal of the American Chemical Society
|August 25, 2015
概括
反向胆脂在二氧化表面形成高度稳定的支持双层,与传统的脂质不同. 这种新的互动为创建强大的生物材料接口提供了一种新方法.
科学领域:
- 材料科学
- 生物材料工程
- 表面化学
背景情况:
- 在细胞膜生物相容性方面,基基胆脂 (PC) 是至关重要的.
- 像二氧化 (SiO2) 和二氧化 (TiO2) 这样的表面上的支持性脂质二层对生物材料很重要.
- 由于吸附力较弱,目前在TiO2上形成支持脂质双层的方法缺乏稳定性.
研究的目的:
- 研究逆胆 (CP) 脂质在TiO2上形成稳定的支持脂质双层的使用.
- 将CP脂质与TiO2表面的稳定性和相互作用进行比较.
- 通过修改脂质结构来探索脂质表面相互作用的可调性.
主要方法:
- 使用暴露酸盐组的反胆 (CP) 脂质.
- 使用素泄漏试验来评估双层融合和稳定性.
- 使用冷传输电子显微镜 (冷TEM) 进行结构分析.
- 研究了pH对CP脂质体对TiO2的吸附的影响.
主要成果:
- CP脂质体成功与TiO2表面融合,形成稳定的支持双层.
- 在恶劣的洗条件下,CP/TiO2双层的稳定性明显高于PC/SiO2系统.
- 在高pH下抑制了CP脂质体对TiO2的吸附.
- CP脂质体表现出强烈的电荷排斥,并没有与表面融合.
结论:
- 反向胆脂可以通过化学结合在TiO2上形成高度稳定的支持双层.
- 调整脂质结构,就像使用逆脂质一样,可以合理控制脂质与表面的相互作用力.
- 这项研究介绍了在金属氧化物上创建稳定支的双层的新系统,以及与无机表面交接的第一个反向脂质.
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