Stability of monomolecular films of archaebacterial tetraether lipids on silicon wafers: a comparison of physisorbed and chemisorbed monolayers.

Stability of monomolecular films of archaebacterial tetraether lipids on silicon wafers: a comparison of physisorbed and chemisorbed monolayers.
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硅片上古细菌四醚脂质单分子膜的稳定性:物理吸附和化学吸附单分子层的比较

DOI:
10.1016/j.colsurfb.2011.05.005
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发表时间:
2011
期刊:
Colloids and surfaces. B, Biointerfaces
影响因子:
--
通讯作者:
Bakowsky U
Bakowsky U
中科院分区:
--
文献类型:
--
作者:
Vidawati S;Sitterberg J;Rothe U;Bakowsky U

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单分子组织的对称,化学修饰的四醚脂质caldarchaeol-PO 4的研究,使用朗缪尔膜平衡,椭圆偏振,和原子力显微镜(AFM)。将固体硅晶片基底改性为疏水、亲水和氨基硅烷化表面;并将Langmuir-Blodgett(LB)膜转移到每个表面上。LB-caldarchaeol-PO 4薄膜进行进一步的冲洗与有机溶剂和额外的物理处理,比较其电阻和化学吸附(氨基硅烷化)和物理吸附(疏水和亲水)表面上的稳定性。这些单层膜的电阻和稳定性,其特征在于椭圆偏振和原子力显微镜,并使用椭圆偏振膜的厚度确定。原子力显微镜也被用来观察表面形貌。疏水表面上的单层膜被发现是更耐冲洗与有机溶剂和额外的物理处理比单层膜上的氨基硅烷化或亲水表面。疏水表面的疏水效应似乎支持在硅晶片衬底上形成更强的caldarchaeol-PO 4膜,具有增加的电阻和稳定性。
The monomolecular organisation of symmetric, chemically modified tetraether lipids caldarchaeol-PO4was studied using Langmuir film balance, ellipsometry, and atomic force microscopy (AFM). Solid silicon wafer substrates were modified to hydrophobic, hydrophilic, and amino-silanised surfaces; and Langmuir–Blodgett (LB)-films were transferred onto each. LB-caldarchaeol-PO4films were subjected to further rinsing with organic solvent and additional physical treatments, to compare their resistance and stability on chemisorbed (amino-silanised) and physisorbed (hydrophobic and hydrophilic) surfaces. The resistance and stability of these monolayer films was characterized by ellipsometry and AFM, and film thickness was determined using ellipsometry. AFM was also employed to observe surface morphology. Monolayer films on hydrophobic surfaces were found to be more resistant to rinsing with organic solvent and additional physical treatments than monolayer films on either amino-silanised or hydrophilic surfaces. The hydrophobic effect with hydrophobic surfaces appears to support the formation of stronger caldarchaeol-PO4films on silicon wafer substrates, with increased resistance and stability.
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