Institute of Chemistry and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem, 9190401, Israel.
Chem Commun (Camb). 2018 Jun 26;54(52):7203-7206. doi: 10.1039/c8cc01637b.
A new approach for fine tuning of the metal work function (WF) in the range of 1 eV is described. WF control is achieved by 3D molecular doping of the metal rather than the classical 2D adsorption. Both small molecules (Congo red, thionine) and polymers (Nafion, poly(vinylbenzyltrimethylammonium)chloride) were shown to affect the work function of gold and silver. The in situ reaction of the dopants within the metallic matrix is a further tool for altering the WF, confirming that this effect is dopant-dependent. We attribute this effect to the charge transfer interactions between the dopant molecule and the surrounding 3D metallic cage.
描述了一种微调金属功函数（WF）在 1eV 范围内的新方法。通过对金属进行 3D 分子掺杂而不是经典的 2D 吸附来实现 WF 控制。小分子（刚果红、硫堇）和聚合物（Nafion、聚（苯乙烯基三甲基氯化铵）盐酸盐）都被证明可以影响金和银的功函数。掺杂剂在金属基质内的原位反应是改变 WF 的另一种工具，这进一步证实了这种效应是依赖于掺杂剂的。我们将这种效应归因于掺杂分子与周围 3D 金属笼之间的电荷转移相互作用。
