提出了一种基于金纳米棒自组装的促进和抑制检测汞离子的方法.在合适的实验条件下，当金纳米棒胶体溶液中加入还原性谷胱甘肽（GSH）时，金纳米棒因Au-S键的形成，通过氢键和静电相互作用发生头对头（End to End）的自组装.当以上体系中加入汞离子时，这种头对头的自组装会被打破，金纳米棒重新呈分散状态.这种方法的最低检测限为1 nmol/L，检测范围为1 nmol/L-100μmol/L.该汞离子检测方法特异性强、灵敏度高且检测的浓度范围比较大，有望广泛用于水环境中汞离子的检测.

A simple and ultrasensitive detect method for mercury based on the assembly and disassembly of gold nanorods was proposed. When reduced glutathione(GSH) was added into gold nanorods colloidal solution, Au - S bond will formed on the surface of the gold nanorods. Meanwhile hydrogen bonding and electrostatic interaction prompt self-assembly of gold nanorods (End to End). After mixed with mercury ion, self-assembly of gold nanorods will be inhibition and re-dispersion. Based on above phenomenon, super lower concentration of mercury ion canbedetected used surface plasmon resonance (SPR) of gold nanorods. The lowest detection limit of this method is 1nmol/L when measured by UV - Vis spectroscopy, and the range is from 10 μmol/L to 100 μmol/L when observed by the naked eye. This method for mercury detection based on the assembly and disassembly of gold nanorods can be applied to detecting and monitoring of mercury in environmental.