Química Ciencias Exactas Física gold Adsorption Gold metal nanoparticles 6 mercaptopurine 6-mercaptopurine Au 100 5x20 Au(111) Chemical structure Chemistry Density functional calculations Density functional theory Desorption Electrochemistry Electronic structure Gold‑sulfur complexes Lattices Metal nanoparticles Molecular dynamics Molecules Physical chemistry Scanning tunneling microscopy Self assembled monolayers Self-assembly Solution chemistry Stability (probability) Stm_leed