AI Article Synopsis
- Threadlike molecular assemblies typically can't enter narrow pores unless there's a strong attraction to the pore walls that makes up for the loss of flexibility.
- Researchers found that by tweaking surfactant-pore wall interactions, they could successfully create wormlike surfactant micelles in 8 nm tubular nanopores of SBA-15 silica.
- By coadsorbing a surface modifier, they could control how these micelles behave between the surrounding solution and the pore space, suggesting this approach could be used with various self-assembling molecules and pore types.
Article Abstract
Threadlike molecular assemblies are excluded from narrow pores unless attractive interactions with the confining pore walls compensate for the loss of configurational entropy. Here we show that wormlike surfactant micelles can be assembled in the 8 nm tubular nanopores of SBA-15 silica by adjusting the surfactant-pore-wall interactions. The modulation of the interactions was achieved by coadsorption of a surface modifier that also provides control over the partitioning of wormlike aggregates between the bulk solution and the pore space. We anticipate that the concept of tuning the interactions with the pore wall will be applicable to a wide variety of self-assembling molecules and pores.
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| http://dx.doi.org/10.1021/ja307534y | DOI Listing |
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