| 报告题目 | The nontrivial relationship between surface forces, surface charging and nonelectrostatic physisorption of ions at conducting and nonconducting surfaces |
| 报告人 | Prof. Drew F. Parsons |
| 报告人单位 | School of Engineering & IT Murdoch University, West Australia |
| 报告时间 | 2016-10-24 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | Abstract：
Surface forces are conventionally interpreted under constant charge or constant potential conditions. But constant potential is a special case involving charge transfer between solution and surface. Other charging mechanisms include charge regulation, competitive site binding, and redox charging of electrodes. In each case the forces are influenced by the nonelectrostatic physisorption energy of potential determining ions. This results in distinct surface forces where some charging mechanisms lead to purely attractive forces while others show repulsion. A true constant potential condition may be set up without charge transfer at all, corresponding to an electrode (supercapacitor) charged by an external power source.
We also review how forces may be described with charge exchange throughout the volume of a layer rather than at the surface. This modification to theory is required in order to properly model surface forces with polymeric layers. |
