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Abstract：
Visualizing the optical response of individual molecules is a long-standing goal in catalysis, molecular nanotechnology, and biotechnology. The molecular response is dominated not only by the electronic states in their isolated environment but also by neighboring molecules and the substrate. Information about the transfer of energy and charge in real environments is essential for the design of the desired molecular functions. However, visualizing these factors with spatial resolution beyond the molecular scale has been challenging. Here, by combining photoinduced force microscopy and Kelvin probe force microscopy, we have mapped the photoinduced force in a pentacene bilayer with a spatial resolution of 0.6 nm and observed its \"multipole excitation\". We identified the excitation as the result of energy and charge transfer between the molecules and to the Ag substrate. These findings can be achieved only by combining microscopy techniques to simultaneously visualize the optical response of the molecules and the charge transfer between the neighboring environments. Our approach and findings provide insights into designing molecular functions by considering the optical response at each step of layering molecules.
摘要：
可视化单个分子的光学响应是催化的长期目标，分子纳米技术,和生物技术。分子响应不仅由其隔离环境中的电子态主导，而且由相邻分子和底物主导。有关实际环境中能量和电荷转移的信息对于设计所需的分子功能至关重要。然而,以超出分子尺度的空间分辨率可视化这些因素一直具有挑战性。这里,通过结合光致力显微镜和开尔文探针力显微镜，我们在空间分辨率为0.6nm的并五苯双层中绘制了光诱导力，并观察了其“多极激发”。我们确定激发是分子之间的能量和电荷转移到Ag基底的结果。这些发现只能通过结合显微镜技术来同时可视化分子的光学响应和相邻环境之间的电荷转移来实现。我们的方法和发现通过考虑分层分子的每个步骤的光学响应，为设计分子功能提供了见解。
