Effect of Surfactant Addition on the Structure of Silver Aggregates Produced by Galvanic Cell Reaction and Fabrication of Superhydrophobic Surfaces |
| |
Authors: | Meiwen Cao Xiao-Ling Wang |
| |
Institution: | 1. Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao Economic and Technological Development Zone , Qingdao, P. R. China cmw7923@yahoo.com.cn;3. Qingdao Vocational and Technical College, Qingdao Economic and Technological Development Zone , Qingdao, P. R. China |
| |
Abstract: | The effect of cationic or anionic surfactant on the structure of the silver particles produced by galvanic cell reaction is studied. In the absence of any surfactant, both spherical and spindle-like Ag particles are produced, which exhibit binary structures with both micro- and nanoscale characteristics. Addition of cationic surfactant cetyltrimethylammonium bromide (CTAB) in the reaction solution results in the formation of spherical Ag particles with much smaller sizes. While anionic surfactant sodium dodecyl sulfate (SDS) results in the spindle-like Ag particles. Moreover, the rough Ag surfaces can be easily fabricated by direct deposition of the Ag aggregates onto the silicon surface from solution. After further chemisorption of a self-assembled monolayer of n-dodecanethiol, the Ag aggregates exhibit superhydrophobic properties. |
| |
Keywords: | CTAB galvanic cell reaction SDS silver particles superhydrophobic |
|
|