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 [MeNCH]Br, with alkyl chain lengths between C and C. The film quality, pore order, pore size, and pore accessibility are probed with a range of techniques.
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| http://dx.doi.org/10.1021/acs.langmuir.1c02854 | DOI Listing |
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