论文标题
从金纳米颗粒到碳电线束的光诱导的热载体注入热载体
Light-induced injection of hot carriers from gold nanoparticles to carbon wire bundles
论文作者
论文摘要
我们观察到通过锚定金纳米颗粒（NP）锚定的一系列平行碳链传播的隧穿电流的光引起的增强。在具有接近NP的等离子共振的波长为特征的激光辐射的存在下，碳束隧穿连接的电流 - 电压特性表明正和负偏置值之间存在明显的不对称性。通常，这种不对称是肖特基交界处的典型特征。隧道交界处的电阻随着光泵强度的增加而降低。我们将观察到的效果与在Au NPS中产生的“热”载体的注入相关联，这是由于表面等离子体的衰减以及电荷转移到碳束的衰变。观察到的现象可用于低维碳结构中的激发激发，用于单光子发射以及光伏应用。
We observed a light-induced enhancement of the tunneling current propagating through an array of parallel carbon chains anchored between gold nanoparticles (NPs). In the presence of laser radiation characterized by a wavelength close to the plasmon resonance of the NPs, the current-voltage characteristics of carbon bundle tunnelling junctions demonstrate a pronounced asymmetry between positive and negative bias values. Such an asymmetry is typical for a Schottky junction, in general. The resistance of the tunnel junction decreases with the increase of the optical pumping intensity. We associate the observed effect with an injection of `hot' carriers created in Au NPs due to the decay of the surface plasmons accompanied by the charge transfer to the carbon bundles. The observed phenomenon can be used for non-resonant excitation of excitonic states in low-dimensional carbon-based structures for single-photon emission, as well as for photovoltaic applications.
