Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
Langmuir. 2010 Jun 15;26(12):9176-8. doi: 10.1021/la1011378.
Local ionic environments within nanometer proximity of a surface play a major role in the interactions which occur there and can be of critical importance in, for example, colloid suspensions, as well as biological function. Such environments often vary significantly from bulk properties, as we show here by the direct imaging of a range of monovalent (Li(+), Na(+)) and divalent (Ca(2+), Mg(2+)) cations distributed at the liquid-solid interface of mica. We image local charge distributions relative to the atomic lattice of mica and adjacent structured water and explain how their location is influenced by the electrostatic characteristics of the underlying lattice.
表面附近纳米级的局部离子环境在发生在那里的相互作用中起着重要作用，例如在胶态悬浮液以及生物功能中都具有至关重要的意义。我们通过直接成像一系列单价（Li(+)、Na(+)）和二价（Ca(2+)、Mg(2+)）阳离子在云母的固-液界面上的分布，展示了这种环境与体相性质显著不同。我们相对于云母的原子晶格和相邻结构水来成像局部电荷分布，并解释了它们的位置如何受到基础晶格的静电特性的影响。
