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本文针对BMIPF6和OMIPF6两种离子液体,在电极表面远离零电荷电位且以负电荷表面电位下,运用AFM力曲线详细地研究了其与Au(111)单晶电极界面所形成的层状结构与温度的关联.在15~40oC的温度范围内,温度越低其离子液体层状结构越稳定.温度对OMIPF6离子液体层状结构的稳定性和数目的影响较BMIPF6缓和:温度变化5oC,OMIPF6靠近表面第一层层状结构的力值变化仅为1~2 nN,而BMIPF6第一层层状结构的力值变化为3~5 nN;较低温下,BMIPF6中层状结构的数目有所增加,而OMIPF6的层状数目始终保持两层,且随温度的变化并不敏感.这可归因于两种离子液体的阳离子尺寸以及与电极表面的作用方式和强度不同;同时,OMIPF6较粘稠,其热运动受温度的影响不甚敏感.
In this paper, two kinds of ionic liquids, BMIPF6 and OMIPF6, were studied in detail on the surface of electrode with Au (111) single crystal electrode under the condition of negative charge surface potential and AFM force curve. Temperature in the temperature range of 15 ~ 40oC, the lower the temperature of the ionic liquid layered structure is more stable temperature and OMIPF6 ionic liquid layered structure stability and the number of the impact than the BMIPF6 ease: temperature changes 5oC, OMIPF6 near The change of the force of the first layered structure on the surface is only 1 ~ 2 nN, while that of the first layer of BMIPF6 varies from 3 to 5 nN. At lower temperature, the number of lamellar structures in BMIPF6 increases , While the number of layers of OMIPF6 remained two layers at all times and was not sensitive to changes in temperature, which could be attributed to the cation size of the two ionic liquids and the mode of action and strength of the surface of the electrode; OMIPF6 was viscous , The thermal motion is less sensitive to temperature.