论文标题
实时卷积伏安法通过高能（热）电子和表面等离子体波导电极上的孔增强
Real-time convolutional voltammetry enhanced by energetic (hot) electrons and holes on a surface plasmon waveguide electrode
论文作者
论文摘要
沿波导工作电极传播的表面等离子体极化子（spps）对局部折射率的变化敏感，这遵循工作电极附近还原和氧化物种的浓度的变化。来自波导工作电极的输出光功率的实时响应与电化学电流密度的时间卷积成正比，从而排除了通过数值积分计算后者A后验的需求。在低功率SPP激发下，通过计时仪测量法和环状伏安法测量得出了波导工作电极的理论光学响应，并在各种扫描速率下以各种浓度的硝酸钾电解质钾中的钾含钾的铁酰亚胺进行验证。增加SPP功率会引起SPS不再仅充当电化学活性的探针，而是作为泵通过在工作电极中的吸收而产生能量电子和孔的状态。在这种制度中，能量载体（电子和孔）向氧化还原物种的转移占主导地位的电化学电流密度，相对于平衡（低spp功率）条件，这一密度显着增强。在此方向上，即使通过能量载体的转移，输出光功率仍与电流密度的时间卷积成正比，即使后者也显着增强。
Surface plasmon polaritons (SPPs) propagating along a waveguide working electrode are sensitive to changes in local refractive index, which follow changes in the concentration of reduced and oxidised species near the working electrode. The real-time response of the output optical power from a waveguide working electrode is proportional to the time convolution of the electrochemical current density, precluding the need to compute the latter a posteriori via numerical integration. The theoretical optical response of a waveguide working electrode is derived, and validated experimentally via chronoamperometry and cyclic voltammetry measurements under low power SPP excitation, for various concentrations of potassium ferricyanide in potassium nitrate electrolyte at various scan rates. Increasing the SPP power induces a regime where the SPPs no longer act solely as a probe of electrochemical activity, but also as a pump creating energetic electrons and holes via absorption in the working electrode. In this regime the transfer of energetic carriers (electrons and holes) to the redox species dominates the electrochemical current density, which becomes significantly enhanced relative to equilibrium (low SPP power) conditions. In this regime the output optical power remains proportional to the time convolution of the current density, even with the latter significantly enhanced by the transfer of energetic carriers.
