Temperature-Dependent Nanostructure of an End-Tethered Octadecane Brush in Tetradecane and Nanoparticle Phase Behavior

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• 作者：Aaron P. R. Eberle ; Norman J. Wagner ; Bulent Akgun ; Sushil K. Satija
• 刊名：Langmuir
• 出版年：2010
• 出版时间：March 2, 2010
• 年：2010
• 卷：26
• 期：5
• 页码：3003-3007
• 全文大小：789K
• 年卷期：v.26,no.5(March 2, 2010)
• ISSN：1520-5827

文摘

The phase behavior of a molecular brush-C₁₈ grafted to the surface of both a silicon wafer and SiO₂ nanoparticles was investigated as a function of temperature using neutron reflectometry (NR) and small-angle neutron scattering (SANS), respectively. The experiments demonstrate a phase change in the brush layer characterized by a straightening of the molecular configuration, increase in shell thickness, and increase in solvent concentration with decreasing temperature that corresponds to gelation in the nanoparticle dispersion.