Chemical modification such as intercalation or doping of novel materials is of great importance for exploratory material science and applications in various fields of physics and chemistry. Herein, the systematic intercalation of chemically exfoliated few‐layer graphene with potassium is reported while monitoring the sample resistance using microwave conductivity. It is found that the conductivity of the samples increases by about an order of magnitude upon potassium exposure. The increased number of charge carriers deduced from the electron spin resonance (ESR) intensity also reflects this increment. The doped phases exhibit two asymmetric Dysonian lines in ESR, a usual sign of the presence of mobile charge carriers. The width of the broader component increases with the doping steps; however, the narrow components seem to have a constant line width.

中文翻译：

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通过原位钾暴露调节几层石墨烯的电导率和自旋动力学

化学修饰（例如插入或掺杂新材料）对于探索性材料科学及其在物理和化学各个领域中的应用非常重要。本文报道了化学剥落的多层石墨烯与钾的系统嵌入，同时使用微波电导率监测样品电阻。发现在钾暴露下，样品的电导率增加了大约一个数量级。由电子自旋共振（ESR）强度推断出的电荷载流子数量的增加也反映了这种增加。掺杂相在ESR中显示两条不对称的Dysonian线，这是存在移动电荷载流子的一个常见标志。较宽分量的宽度随掺杂步骤而增加；即，随着掺杂步骤的增加而增加。然而，