Layering of [BMIM]+-based ionic liquids at a charged sapphire interface.

  title={Layering of [BMIM]+-based ionic liquids at a charged sapphire interface.},
  author={Markus Mezger and Sebastian Schramm and Heiko Schr{\"o}der and Harald Reichert and Moshe Deutsch and Emerson J de Souza and John S. Okasinski and Benjamin M. Ocko and Veijo Honkim{\"a}ki and Helmut Dosch},
  journal={The Journal of chemical physics},
  volume={131 9},
The structure of two model room temperature ionic liquids, [BMIM](+)[PF(6)](-) and [BMIM](+)[BF(4)](-), near the solid/liquid interface with charged Al(2)O(3)(0001) (sapphire) was determined with subnanometer resolution by high energy (72.5 keV) x-ray reflectivity. [BMIM](+)[PF(6)](-) exhibits alternately charged, exponentially decaying, near-surface layering. By contrast, the smaller-anion compound, [BMIM](+)[BF(4)](-), shows only a single layer of enhanced electron density at the interface… CONTINUE READING


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