Nitrate ions as cathodic alkalization promoters for the electro-assisted deposition of sol-gel thin films

作者：Ding Shang Zhi; Liu Liang; Hu Ji Ming^*; Zhang Jian Qing; Cao Chu Nan

来源：Scripta Materialia, 2008, 59(3): 297-300.

DOI：10.1016/j.scriptamat.2008.03.028

• thin films
• sol-gel
• electro-assisted deposition
• nitrate
• aluminum

Nitrate was used as a promoter to prepare dodecyltrimethoxysilane thin films on aluminum substrates. With the addition of nitrate into silane sol-gel precursors, the electro-assisted formation of silane films was facilitated, as indicated by electrochemical impedance spectroscopy, scanning electron microscopy and secondary-ion mass spectroscopy, due to the promotion in cathodic alkalization. However, an extra-high concentration of nitrate would be harmful because of the salting-out effect in precursors and the soluble nitrate remaining in silane films.

• 出版日期2008-8
• 单位浙江大学