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Local modification of intermolecular interactions at a sub-molecule level

Title
Local modification of intermolecular interactions at a sub-molecule level
Authors
Song, Sang YongJeong, Yong ChanKim, Young JaeKang, Joon GooSeo, Jung Pil
DGIST Authors
Song, Sang Yong; Jeong, Yong Chan; Kim, Young Jae; Kang, Joon Goo; Seo, Jung Pil
Issue Date
2016
Citation
Nanotechnology, 27(41)
Type
Article
Article Type
Article
Keywords
Au (111) SubstratesBack DonationChemisorptionDensity Functional TheoryElectron Back-DonationInduced ChargesIntermolecular InteractionsLigandsLocal ChargeMolecule LevelsMoleculesNickel PhthalocyaninesNitrogen CompoundsPhthalocyanineScanning Tunneling MicroscopySTM
ISSN
0957-4484
Abstract
The local modification of intermolecular interactions in nickel-phthalocyanine molecules (NiPCs) is investigated on an Au(111) substrate using scanning tunneling microscopy. When the molecules are physisorbed on the substrate, they repel each other due to induced charge dipole moments. However, when the NiPC is chemisorbed on the substrate through the dehydrogenation of one of its ligands by a bias pulse, we find that a nearby physisorbed NiPC is attracted to the dehydrogenated ligand and trapped. Using our experimental results in combination with density functional theory calculations, we show that the observed attraction can be ascribed to the local charge redistribution around the dehydrogenated ligand of the chemisorbed NiPC. Furthermore, we demonstrate that desorption of the attracted NiPC from the trapped site can be readily controlled by changing the density of NiPCs around the dehydrogenated ligand. © 2016 IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/2759
DOI
10.1088/0957-4484/27/41/415711
Publisher
Institute of Physics Publishing
Files:
There are no files associated with this item.
Collection:
School of Undergraduate Studies1. Journal Articles
Emerging Materials ScienceComputational Materials Theory Group1. Journal Articles
Emerging Materials ScienceNanospm Lab(Quantum Physics Research Group)1. Journal Articles
Emerging Materials ScienceLight and Matter Theory Laboratory1. Journal Articles
ETC1. Journal Articles


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