Interfaces of organic molecules with inorganic substrates exist widely in nanoscience and technology. For example, in molecular electronic devices, 1, 2 in chemical or biological sensors, 3, 4 and in organic-mediated nanocrystals and supercrystals, 5 the organic molecular layers are bound to the inorganic electrodes or substrates. It has been shown recently that soft materials such as DNA may be used as templates in nanofabrication of devices6, 7 and that in heterogeneous enantioselective catalysis the enantioselectivity of catalytically active surfaces is usually induced by adsorption of some chiral molecules, 8 such as amino acids. 9, 10 Organic/inorganic interfaces also play crucial roles in biomaterials and biocompatible materials. 11 Moreover, it has even been pointed out that organic molecules, such as proteins, can alter inorganic microstructures of ceramics and semiconductors, etc., thus offering a very powerful tool for the design of novel hybrid materials. 12

In these applications, the organic molecules must be, obviously, either chemisorbed on the surface or immobilized via other molecules that are chemisorbed on the surface. However, this is not always the case. For instance, Au, on one hand, has been used widely in molecule-mediated self-assembly of nanostructures13 and amino acids, on the other hand, have big potential in this respect, as just mentioned, adsorption of many amino acids, such as glycine, on Au surfaces is physisorption in character. 14 Could the adsorption behavior of a given