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New electronic and magnetic properties of monolayers of thiols on gold
Author(s) -
Carmeli Itai,
Naaman Ron,
Leitus Gregory,
Reich Shimon,
Vager Zeev
Publication year - 2004
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/nttg-64mp-vqwj-m34u
Subject(s) - chemistry , monolayer , magnetism , ferromagnetism , adsorption , magnetic circular dichroism , molecule , chemical physics , layer (electronics) , substrate (aquarium) , electron transfer , nanotechnology , photochemistry , condensed matter physics , organic chemistry , spectral line , biochemistry , physics , oceanography , materials science , astronomy , geology
New electronic and magnetic properties are induced by the adsorption of close‐packed monolayers of thiols on gold. In layers made from chiral molecules, unexpectedly large electronic dichroism is observed, which manifests itself as spin‐specific electron transmission. For many thiolated molecules self‐assembled on gold, a surprisingly large ferromagnetism is observed. All the observations can be rationalized by assuming orbital ferromagnetism of the organic thin layer. This is a new type of magnetism, induced by the formation of a closed packed layer of organic molecules on metal. The adsorption results in charge transfer between the substrate and the adsorbed layer, which is the origin of this magnetism.