Department of Chemistry and Bioactive Materials Science and Research Institute of Physics and Chemistry, Chonbuk National University, Jeonju 561-756, Korea.
J Chem Phys. 2013 Aug 21;139(7):074707. doi: 10.1063/1.4817947.
Here, we show that the pathways, products, and efficiencies of reactions occurring on a metal surface can be spatially modulated by varying the type and energy of hot carriers produced by injecting tunneling electrons or holes from a scanning tunneling microscope tip into the metal surface. Control over the metal surface reactions was demonstrated for the large-scale dissociation reaction of O2 molecules on a Ag(110) surface. Hot electrons (or holes) transported through the metal surface to chemisorbed O2 selectively dissociated the molecule into two oxygen atoms separated along the [110] (or [001]) lattice direction. The reaction selectivity was enhanced compared to the selectivity of a direct reaction involving tunneling carriers.
在这里，我们展示了通过从扫描隧道显微镜针尖注入隧道电子或空穴来改变金属表面产生的热载流子的类型和能量，可以在空间上调节发生在金属表面的反应途径、产物和效率。我们通过 Ag(110) 表面上 O2 分子的大规模离解反应证明了对金属表面反应的控制。穿过金属表面传输的热电子（或空穴）选择性地将分子离解成两个氧原子，沿[110]（或[001]）晶格方向分离。与涉及隧道载流子的直接反应的选择性相比，反应的选择性得到了增强。
