Mercaptoacetic acid SAMs ( MA/ Au SAMs) were prepared and charactered by electrochemical methods, ATR-FTIR and scanning electronic microscopy ( SEM). The electrochemical behaviors of dopamine and metol have been investigated at the MA/ Au SAMs. 本文利用巯基乙酸自组装成稳定的单分子膜,利用电化学法、ATR&FTlR和SEM等方法对自组装膜进行了表征,研究了多巴胺、米吐尔等分子在电极上的电化学行为。