A solvent that reversibly converts from a nonionic liquid mixture to an ionic liquid upon contact with a selected trigger, e. An insulating layer is formed so that at least a part of the insulating layer is disposed on the first conductive layer. Another implementation relates to use of a central tracking object that can be used to efficiently register and distribute peer messages among the various peers. , and subscripts \u03b1, \u03b2, \u03b3 and \u03b4 represent numerical values which satisfy 0.