Zechao Yang
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View article: Low‐ Temperature Transformations in Amorphous Silica Bilayers on Ru(0001) After Crystal‐Glass Transition: Closer Look
Low‐ Temperature Transformations in Amorphous Silica Bilayers on Ru(0001) After Crystal‐Glass Transition: Closer Look Open
The crystal‐glass transition concerning silicon dioxide has been a topic of intense research. It has been possible to prepare a bilayer silica film on a metal substrate and study the corresponding transition in real space using scanning tu…
View article: Highly Selective Decarboxylative Dimerization via Molecular Self-Assembly-Induced Confinement Effects
Highly Selective Decarboxylative Dimerization via Molecular Self-Assembly-Induced Confinement Effects Open
On-surface synthesis of specified products with high selectivity represents a powerful approach to fabricate functional materials. The regulation of selectivity has always been a focal point of interest, and a diverse of methods are utiliz…
View article: On-Surface Synthesis of Porphyrin Nanoribbons via Cycloaromatization of Isopropyl Substituents on Au(111)
On-Surface Synthesis of Porphyrin Nanoribbons via Cycloaromatization of Isopropyl Substituents on Au(111) Open
We report the surface-mediated synthesis of quasi-one-dimensional (quasi-1D) porphyrin nanoribbons (PNRs) via a hierarchical process involving: (i) [3+3] cycloaromatization of isopropyl substituents, (ii) intramolecular cyclodehydrogenatio…
View article: Explore the Structural and Electronic Properties at the Organic/Organic Interfaces of Thiophene-Based Supramolecular Architectures
Explore the Structural and Electronic Properties at the Organic/Organic Interfaces of Thiophene-Based Supramolecular Architectures Open
The structural and electronic properties at organic/organic interfaces determine the functionality of organic electronics. Here, we investigated the structural and electronic properties at interfaces between methyl-substituted dicyanovinyl…
View article: Structural and Electronic Properties of Thiophene-Based Supramolecular Architectures: Influence of the Underlying Metal Surfaces
Structural and Electronic Properties of Thiophene-Based Supramolecular Architectures: Influence of the Underlying Metal Surfaces Open
Dicyanovinyl (DCV)-substituted oligothiophenes consist of both electron donor and acceptor ligands, which makes them promising materials for organic electronics. Here, we studied the structural and electronic properties of methyl-substitut…
View article: Intact water adsorption on Co(0001) at 100 K: transition from ordered bilayer to amorphous ice structures
Intact water adsorption on Co(0001) at 100 K: transition from ordered bilayer to amorphous ice structures Open
The adsorption behavior of water on the Co(0001) surface at 100 K was studied. Ordered (√3 × √3) R 30° D 2 O bilayer D-up and D-down configurations were identified, along with their transitions to amorphous ice structures.
View article: A high-speed variable-temperature ultrahigh vacuum scanning tunneling microscope with spiral scan capabilities
A high-speed variable-temperature ultrahigh vacuum scanning tunneling microscope with spiral scan capabilities Open
We present the design and development of a variable-temperature high-speed scanning tunneling microscope (STM). The setup consists of a two-chamber ultra-high vacuum system, including a preparation and a main chamber. The preparation chamb…
View article: Mesoscopic Structures and Coexisting Phases in Silica Films
Mesoscopic Structures and Coexisting Phases in Silica Films Open
Silica films represent a unique two-dimensional film system, exhibiting both crystalline and vitreous forms. While much scientific work has focused on the atomic-scale features of this film system, mesoscale structures can play an importan…
View article: Dynamics in the O(2 × 1) adlayer on Ru(0001): bridging timescales from milliseconds to minutes by scanning tunneling microscopy
Dynamics in the O(2 × 1) adlayer on Ru(0001): bridging timescales from milliseconds to minutes by scanning tunneling microscopy Open
The dynamics within an O(2 × 1) adlayer on Ru(0001) is studied by density functional theory and high-speed scanning tunneling microscopy.
View article: Structure and registry of the silica bilayer film on Ru(0001) as viewed by LEED and DFT
Structure and registry of the silica bilayer film on Ru(0001) as viewed by LEED and DFT Open
Structure and registry of the silica bilayer film with respect to its supporting metal substrate revealed by low energy electron diffraction.
View article: Spiral high-speed scanning tunneling microscopy: Tracking atomic diffusion on the millisecond timescale
Spiral high-speed scanning tunneling microscopy: Tracking atomic diffusion on the millisecond timescale Open
Scanning tunneling microscopy (STM) is one of the most prominent techniques to resolve atomic structures of flat surfaces and thin films. With the scope to answer fundamental questions in physics and chemistry, it was used to elucidate num…
View article: Metal–Organic Superlattices Induced by Long-Range Repulsive Interactions on a Metal Surface
Metal–Organic Superlattices Induced by Long-Range Repulsive Interactions on a Metal Surface Open
Chains of Na atoms and dicyanovinyl-quinquethiophene (DCV5T-Me2) molecules\nwith ionic bonds form a superlattice on Au(111). Through a detailed analysis of\nthe interchain distances obtained from scanning tunneling microscopy images at\nva…
View article: Continuous network structure of two-dimensional silica across a supporting metal step edge: An atomic scale study
Continuous network structure of two-dimensional silica across a supporting metal step edge: An atomic scale study Open
The network structure of a silica bilayer film at a monolayer-bilayer transition and across a supporting metal step edge was studied at the atomic scale by scanning tunneling microscopy. The ring size distribution, ring-ring distances, and…
View article: Frontispiece: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support
Frontispiece: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support Open
The thinnest possible films of the glass-forming materials silica and germania were so far investigatd by employing scanning probe microscopy and density functional theory calculations. A more general comprehension of the network structure…
View article: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support
Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support Open
The present review reports on the preparation and atomic‐scale characterization of the thinnest possible films of the glass‐forming materials silica and germania. To this end state‐of‐the‐art surface science techniques, in particular scann…
View article: On‐Surface Assembly of Hydrogen‐ and Halogen‐Bonded Supramolecular Graphyne‐Like Networks
On‐Surface Assembly of Hydrogen‐ and Halogen‐Bonded Supramolecular Graphyne‐Like Networks Open
Demonstrated here is a supramolecular approach to fabricate highly ordered monolayered hydrogen‐ and halogen‐bonded graphyne‐like two‐dimensional (2D) materials from triethynyltriazine derivatives on Au(111) and Ag(111). The 2D networks ar…
View article: On‐Surface Assembly of Hydrogen‐ and Halogen‐Bonded Supramolecular Graphyne‐Like Networks
On‐Surface Assembly of Hydrogen‐ and Halogen‐Bonded Supramolecular Graphyne‐Like Networks Open
Demonstrated here is a supramolecular approach to fabricate highly ordered monolayered hydrogen‐ and halogen‐bonded graphyne‐like two‐dimensional (2D) materials from triethynyltriazine derivatives on Au(111) and Ag(111). The 2D networks ar…
View article: Direct Imaging of the Induced‐Fit Effect in Molecular Self‐Assembly
Direct Imaging of the Induced‐Fit Effect in Molecular Self‐Assembly Open
Molecular recognition is a crucial driving force for molecular self‐assembly. In many cases molecules arrange in the lowest energy configuration following a lock‐and‐key principle. When molecular flexibility comes into play, the induced‐fi…
View article: Structural and Electronic Properties of Thiophene-based Supramolecular\nArchitectures on Metal Surfaces
Structural and Electronic Properties of Thiophene-based Supramolecular\nArchitectures on Metal Surfaces Open
The functionality of organic layers on metal substrates is determined by\nintermolecular and molecule-surface interactions. In a metal-organic complex,\nthe metal-ligand hybridization induces drastic modification to the free\nmolecular fea…
View article: Experiment Control with EPICS7 and Symmetric Multiprocessing on RTEMS
Experiment Control with EPICS7 and Symmetric Multiprocessing on RTEMS Open
At the Fritz Haber Institute of the Max Planck Society a new very high speed scanning tunneling microscope (VHS-STM) is being set up to resolve glass dynamics (Cryvisil). We have been successfully using EPICS (v3) for many of our most impo…
View article: Two-dimensional delocalized states in organometallic bis-acetylide networks on Ag(111)
Two-dimensional delocalized states in organometallic bis-acetylide networks on Ag(111) Open
Scanning tunneling spectroscopy and density-functional theory reveal an unoccupied electronic state that is delocalized along the entire organometallic Ag-bis-acetylide network.
View article: Binary supramolecular networks of bridged triphenylamines with different substituents and identical scaffolds
Binary supramolecular networks of bridged triphenylamines with different substituents and identical scaffolds Open
Based on scanning tunneling microscopy experiments combined with density functional theory, we report the formation and the electronic structure of porous binary supramolecular networks on Au(111).
View article: Hierarchical on-surface synthesis and electronic structure of carbonyl-functionalized one- and two-dimensional covalent nanoarchitectures
Hierarchical on-surface synthesis and electronic structure of carbonyl-functionalized one- and two-dimensional covalent nanoarchitectures Open
The fabrication of nanostructures in a bottom-up approach from specific molecular precursors offers the opportunity to create tailored materials for applications in nanoelectronics. However, the formation of defect-free two-dimensional (2D…
View article: Electronic structure and excited state dynamics in a dicyanovinyl-substituted oligothiophene on Au(111)
Electronic structure and excited state dynamics in a dicyanovinyl-substituted oligothiophene on Au(111) Open
Using complementary experimental methods we determined the ionization potentials, affinity levels and exciton binding energies of dicyanovinyl-oligothiophene on Au(111).