| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Weidner, Tobias
Aarhus University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2022Peptide Orientation at Emulsion Nanointerfaces Dramatically Different from Flat Surfacescitations
- 2021Windowless detection geometry for sum frequency scattering spectroscopy in the C-D and amide i regionscitations
- 2021Insects use lubricants to minimize friction and wear in leg jointscitations
- 2020Role of Surface Chemistry in the Superhydrophobicity of the Springtail Orchesella cincta (Insecta:Collembola)citations
- 2020Lasalocid Acid Antibiotic at a Membrane Surface Probed by Sum Frequency Generation Spectroscopycitations
- 2018Structure of von Willebrand factor A1 on polystyrene determined from experimental and calculated sum frequency generation spectracitations
- 2018The surface chemistry of iron oxide nanocrystalscitations
- 2018Effect of Internal Heteroatoms on Level Alignment at Metal/Molecular Monolayer/Si Interfacescitations
- 2016Kinetically Controlled Sequential Growth of Surface-Grafted Chiral Supramolecular Copolymerscitations
- 2016Differential surface activation of the A1 domain of von Willebrand factorcitations
- 2016Functionalization of nanocrystalline diamond films with phthalocyaninescitations
- 2015Multiscale Effects of Interfacial Polymer Confinement in Silica Nanocompositescitations
- 2013Effects of self-assembled monolayer structural order, surface homogeneity and surface energy on pentacene morphology and thin film transistor device performancecitations
- 2013SFG analysis of surface bound proteinscitations
- 2013Covalently attached organic monolayers onto silicon carbide from 1-alkynescitations
- 2013Molecular suction padscitations
- 2012Probing the orientation of electrostatically immobilized protein G B1 by time-of-flight secondary ion spectrometry, sum frequency generation, and near-edge X-ray adsorption fine structure spectroscopycitations
- 2012Zwitterionic dithiocarboxylates derived from N-heterocyclic carbenescitations
- 2012Bottom-contact small-molecule n-type organic field effect transistors achieved via simultaneous modification of electrode and dielectric surfacescitations
- 2012Solid-state densification of spun-cast self-assembled monolayers for use in ultra-thin hybrid dielectricscitations
- 2011Simultaneous modification of bottom-contact electrode and dielectric surfaces for organic thin-film transistors through single-component spin-cast monolayerscitations
- 2011Probing albumin adsorption onto calcium phosphates by x-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometrycitations
- 2011Characterization of poly(sodium styrene sulfonate) thin films grafted from functionalized titanium surfacescitations
- 2010Probing the orientation of surface-immobilized protein G B1 using ToF-SIMS, sum frequency generation, and NEXAFS spectroscopycitations
- 2010Multi-technique Characterization of Adsorbed Peptide and Protein Orientationcitations
- 2010Structure and Order of Phosphonic Acid-Based Self-Assembled Monolayers on Si(100)citations
- 2010Effect of the phenyl ring orientation in the polystyrene buffer layer on the performance of pentacene thin-film transistorscitations
- 2009Self-Assembly of a Pyridine-Terminated Thiol Monolayer on Au(111)citations
- 2009Amide or Aminecitations
Places of action
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article
Effect of Internal Heteroatoms on Level Alignment at Metal/Molecular Monolayer/Si Interfaces
Abstract
Molecular monolayers at metal/semiconductor heterointerfaces affect electronic energy level alignment at the interface by modifying the interface's electrical dipole. On a free surface, the molecular dipole is usually manipulated by means of substitution at its external end. However, at an interface such outer substituents are in close proximity to the top contact, making the distinction between molecular and interfacial effects difficult. To examine how the interface dipole would be influenced by a single atom, internal to the molecule, we used a series of three molecules of identical binding and tail groups, differing only in the inner atom: aryl vinyl ether (PhO), aryl vinyl sulfide (PhS), and the corresponding molecule with a CH2 group - allyl benzene (PhC). Molecular monolayers based on all three molecules have been adsorbed on a flat, oxide-free Si surface. Extensive surface characterization, supported by density functional theory calculations, revealed high-quality, well-aligned monolayers exhibiting excellent chemical and electrical passivation of the silicon substrate, in all three cases. Current-voltage and capacitance-voltage analysis of Hg/PhX (X = C, O, S)/Si interfaces established that the type of internal atom has a significant effect on the Schottky barrier height at the interface, i.e., on the energy level alignment. Surprisingly, despite the formal chemical separation of the internal atom and the metallic electrode, Schottky barrier heights were not correlated to changes in the semiconductor's effective work function, deduced from Kelvin probe and ultraviolet photoemission spectroscopy on the monolayer-adsorbed Si surface. Rather, these changes correlated well with the ionization potential of the surface-adsorbed molecules. This is interpreted in terms of additional polarization at the molecule/metal interface, driven by potential equilibration considerations even in the absence of a formal chemical bond to the top Hg contact.