The field-effect technique, popular thanks to its application in commonfield-effect transistors, is here applied to metallic thin films by using as adielectric a novel polymer electrolyte solution. The maximum injected surfacecharge, determined by a suitable modification of a classic method ofelectrochemistry called double-step chronocoulometry, reached some units in10^15 charges/cm^2. At room temperature, relative variations of resistance upto 8%, 1.9% and 1.6% were observed in the case of gold, silver and copper,respectively and, if the films are thick enough (> 25 nm), results can benicely explained within a free-electron model with parallel resistive channels.The huge charge injections achieved make this particular field-effect techniquevery promising for a vast variety of materials such as unconventionalsuperconductors, graphene and 2D-like materials.
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机译：场效应技术因其在共场效应晶体管中的应用而广受欢迎，此处通过使用新型高分子电解质溶液作为电介质，将其应用于金属薄膜。通过对经典的电化学方法（称为双步计时库仑法）进行适当修改，可以确定最大注入的表面电荷达到10 ^ 15电荷/ cm ^ 2的某些单位。在室温下，对于金，银和铜，分别观察到电阻的相对变化分别达到8％，1.9％和1.6％，并且如果膜足够厚（> 25 nm），则结果可以很好地解释。具有平行电阻通道的自由电子模型。获得的巨大电荷注入使这种特殊的场效应技术非常有希望用于多种材料，例如非常规超导体，石墨烯和2D类材料。
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