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Mohamed, Nabil A. N.; Han, Yisong; Hector, Andrew L.; Houghton, Anthony R.; Hunter-Sellars, Elwin; Reid, Gillian; Williams, Daryl R.; Zhang, Wenjian
Langmuir, 02/2022, Volume: 38, Issue: 7Journal Article
The variation in pore size in mesoporous films produced by electrochemically assisted self-assembly (EASA) with the surfactant chain length is described. EASA produces a hexagonal array of pores perpendicular to the substrate surface by using an applied potential to organize cationic surfactants and the resultant current to drive condensation in a silica sol. Here, we show that a range of pore sizes between 2 and 5 nm in diameter is available with surfactants of the form Me3NC n H2n+1Br, with alkyl chain lengths between C14 and C24. The film quality, pore order, pore size, and pore accessibility are probed with a range of techniques.
