The technological capabilities towards the generation of smaller minimum feature sizes, e.g., in microelectronics, are fundamentally limited in the top-down approach. An alternative route to generate nanometer sized functional structures is the self-assembly of atoms or molecules on well-defined surfaces [1, 2, 3, 4]. Within this bottom-up strategy, the investigation of large organic molecules on single crystalline surfaces, in particular with scanning tunneling microscopy (STM), has become a fast growing field in surface science. One main motivation lies in the exploration of nanodevice concepts with the perspective to engineer devices with outstanding properties. Additionally, it opens up the possibility to gain detailed insight into the fundamental properties of the utilized molecular building blocks in real space. In this respect, metallo-porphyrinoids appear as ideal candidates due to their versatile functionalities, which are mainly determined by the corresponding central metal. Prominent examples, where porphyrinoids act as main functional building blocks can be found in biological systems, e.g., magnesium porphyrins in chlorophyll , cobalt corrin in cobalamin (vitamin B12) , or iron porphyrin in heme, which is essential for oxygen transport in the blood stream of mammals .
KeywordsCentral Metal Scanning Tunneling Microscopy Technological Capability Scanning Tunneling Microscopy Image Surface Science
- 1.Waser R (ed) (2003) Nanoelectronics and information technology. Wiley-VCH, WeinheimGoogle Scholar
- 5.Kadish KM, Smith KM, Guilard R (eds) (2003) The porphyrin handbook, vol 13. Chlorophylls and bilins: biosynthesis, synthesis, and degradation. Academic Press, San DiegoGoogle Scholar
- 6.Kräutler B, Ostermann S (2003) Structure, reactions, and functions of B12 and B12-proteins. In: Kadish KM, Smith KM, Guilard R (eds) The porphyrin handbook, vol 11. Academic Press, San Diego, pp 229Google Scholar
- 7.Mansuy D, Battioni P (2000) Diversity of reactions catalyzed by heme-thiolate proteins. In: Kadish KM, Smith KM, Guilard R (eds) The porphyrin handbook, vol 4. Academic Press: San Diego, pp 1Google Scholar
- 8.Gottfried JM, Marbach H (2009) Z Phys Chem 223:53Google Scholar