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STM Manipulation of Molecular Moulds on Metal Surfaces

Nano Research 2009年第3期2卷 254-259页

作者： Miao Yu Wei Xu Youness Benjalal Regis Barattin Erik Lægsgaard ivan stensgaard Mohamed Hliwa Xavier Bouju AndréGourdon Christian Joachim Trolle R.Linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Facultédes Sciences Ben MʼSik UniversitéHassan II-MohammédiaBP 7955Sidi OthmanCasablancaMorocco

Molecular Landers are a class of compounds containing an aromatic board as well as bulky side groups which upon adsorption of the molecule on a surface may lift the molecular board away from the *** molecular Landers have extensively been studied as model systems for nanomachines and the formation of molecular wires,as well as for their function as“molecular moulds”,i.e.,acting as templates by accommodating metal atoms underneath their aromatic ***,we investigate the adsorption of a novel Lander molecule 1,4-bis(4-(2,4-diaminotriazine)phenyl)-2,3,5,6-tetrakis(4-tert-butylphenyl)benzene(DAT,C_(64)H_(68)N_(10))on Cu(110)and Au(111)surfaces under ultrahigh vacuum(UHV)*** means of scanning tunneling microscopy(STM)imaging and manipulation,we characterize the morphology and binding geometries of DAT molecules at terraces and step *** the Cu(110)surface,various contact configurations of individual DAT Landers were formed at the step edges in a controlled manner,steered by STM manipulation,including lateral translation,rotation,and pushing molecules to an upper *** diffusion barrier of single DAT molecules on Au(111)is considerably smaller than on Cu(110).The DAT Lander is specially designed with diamino-triazine side groups making it suitable for future studies of molecular self-assembly by hydrogen-bonding *** results presented here are an important guide to the choice of substrate for future studies using this compound.

关键词： Scanning tunneling microscopy(STM) molecular Landers adsorption STM manipulation molecular moulding

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Exploring the Transferability of Large Supramolecular Assemblies to the Vacuum-Solid Interface

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Nano Research 2009年第7期2卷 535-542页

作者： Wei Xu Mingdong Dong Henkjan Gersen Socorro Vázquez-Campos Xavier Bouju Erik Lægsgaard ivan stensgaard Mercedes Crego-Calama David NReinhoudt Trolle R.Linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Laboratory of Supramolecular Chemistry and Technology Materials Science and Technology of PolymersMESA+Institute for NanotechnologyUniversity of TwenteP.O.Box 2177500 AE EnschedeThe Netherlands Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Current address:Departments of Chemistry and Physics The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA Current address:Nanophysics and Soft Matter Group Department of PhysicsUniversity of BristolTyndall AvenueBS81TL BristolUK

We present an interplay of high-resolution scanning tunneling microscopy imaging and the corresponding theoretical calculations based on elastic scattering quantum chemistry techniques of the adsorption of a gold-functionalized rosette assembly and its building blocks on a Au(111)surface with the goal of exploring how to fabricate functional 3-D molecular nanostructures on *** supramolecular rosette assembly stabilized by multiple hydrogen bonds has been sublimed onto the Au(111)surface under ultra-high vacuum conditions;the resulting surface nanostructures are distinctly different from those formed by the individual molecular building blocks of the rosette assembly,suggesting that the assembly itself can be transferred intact to the surface by in situ thermal *** unanticipated result will open up new perspectives for growth of complex 3-D supramolecular nanostructures at the vacuum-solid interface.

关键词： Self-assembly surface nanostructures scanning tunneling microscopy supramolecular assembly hydrogen bonding

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