Exploratory Experiments on Surface Coating with ElectrosprayIons

本研究的目的是通过电喷雾源在各种衬底上沉积离子来制备和表征表面层。这些物质是通过静电将母体分子的溶液作为带电液滴的细喷雾或雾分散到浴气中而产生的。液滴的蒸发增加了它们的表面电荷密度，因此产生的电场最终变小到足以将离子解吸到周围的气体中。这些离子可以由几乎任何溶质物质组成，与阳离子或阴离子聚集，其分子量至少可达40,000，每个离子可携带多达45个或更多的电荷。它们将沉积在电介质衬底上（带有导电电极），以产生带电或中和的表面（通过同时或随后的相反符号离子通量）。它们也将被沉积在导电基底上，以产生电中性的涂层。所产生的新表面的物理和化学性质将被表征。

The purpose of this research is to prepare and characterize surface layers by depositing ionic species from an electrospray source on various kinds of substrates. These species are produced by electrostatically dispersing solutions of parent molecules as a fine spray or fog of charged droplets into a bath gas. Evaporation of the droplets increases their surface charge density so that the resulting electric field ultimately becomes small enough to desorb ions into the ambient gas. These ions can comprise almost any solute species in aggregation with cations or anions and can have molecular weights up to at least 40,000 with as many as 45 or more charges per ion. They will be deposited on dielectric substrates (with an underlying conducting electrode) to produce surfaces that are either charged or neutralized (by a simultaneous or subsequent flux of ions of opposite sign. They will also be deposited on conducting substrates to produce coatings of electrically neutral species. The physical and chemical properties of the resulting novel surfaces will be characterized.