Themed collection Scanning Probe Studies of Molecular Systems
Growth of boronic acid based two-dimensional covalent networks on a metal surface under ultrahigh vacuum
An extensive analysis of the complex mechanisms governing the on-surface polymerisation of boronic acid on a metal surface under vacuum.
Studying the dynamic behaviour of porphyrins as prototype functional molecules by scanning tunnelling microscopy close to room temperature
Scanning tunnelling microscopy of the dynamics of functional molecules (porphyrins) close to room temperature enables a detailed determination of the thermodynamic potentials including entropic contributions of the underlying processes.
Bestowing structure upon the pores of a supramolecular network
Trigonal molecules compartmentalise the pores of a supramolecular honeycomb network.
Self-assembly of pyrene derivatives on Au(111): substituent effects on intermolecular interactions
Halogen bonding-based self-assembly of pyrene derivatives on Au(111).
Biaxial aromatics with face-on/edge-on stacking adaptability: an STM/STS study of 1D nanowires assembled via rotatable ethynyls
Biaxial aromatics with face-on/edge-on stacking adaptability.
Van der Waals interactions in the self-assembly of 5-aminohelicene on Cu(100) and Au(111)
No H bonding for the amino group: van der Waals interactions guide the self-assembly of an aminohelicene on Cu(100) and Au(111).
Hierarchical growth of curved organic nanowires upon evaporation induced self-assembly
Hierarchical growth of multilayers and complex curved nanostructures including nanospirals and concentric nanorings upon evaporation of a solution.
Playing peekaboo with graphene oxide: a scanning electrochemical microscopy investigation
Electrostatic interactions with the molecular mediator control imaging of graphene oxide by scanning electrochemical microscopy.
Probing the spatial and momentum distribution of confined surface states in a metal coordination network
We show how the surface state is confined and modulated by the porous structure of a metal-coordinated dicyano-anthracene on-surface network on Cu(111), as evidenced by scanning tunnelling microscopy and spectroscopy measurements in real and reciprocal space.
Synthesis of polydopamine at the femtoliter scale and confined fabrication of Ag nanoparticles on surfaces
Polydopamine is synthesized in confined femtolitre sized droplets and used as green nanoreactors to fabricate Ag nanoparticles on surfaces.
Molecular tectonics based nanopatterning of interfaces with 2D metal–organic frameworks (MOFs)
The nanostructuring of the graphite surface with 2DMOF, based on a combination of an acentric porphyrin tecton and a CoCl2 metallatecton, was achieved at the solid–liquid interface and characterized by scanning tunnelling microscopy.
Affecting surface chirality via multicomponent adsorption of chiral and achiral molecules
Here we report on the apparent reduction in surface chirality upon co-assembling a chiral and achiral molecule into a physisorbed self-assembled monolayer at the liquid/solid interface as revealed by scanning tunneling microscopy (STM).
Efficient molecular recognition based on nonspecific van der Waals interaction at the solid/liquid interface
A surprising recognition phenomenon based on van der Waals interactions was observed, which proves that the design of the supramolecular assembly from its building blocks represents a highly promising and general strategy.
Cyclotrimerization of arylalkynes on Au(111)
Cyclotrimerization of arylalkynes on Au(111) proceeds readily at modest temperatures, and affords two-dimensional covalently bonded polyphenylene networks.
Thermally activated polymorphic transition from a 1D ribbon to a 2D carpet: squaric acid on Au(111)
Polymorphic transition from the 1D ribbon to the 2D carpet superstructure of squaric acid molecules on Au(111) was achieved through a thermally activated process.
Bicomponent hydrogen-bonded nanostructures formed by two complementary molecular Landers on Au(111)
One- and two-dimensional structures formed by two Lander molecules on Au(111) via 3D-optimized or complementary triple H-bonding are studied by scanning tunneling microscopy and rationalized by numerical calculations.
Potential-driven molecular tiling of a charged polycyclic aromatic compound
Electrochemical potential causes molecular tiling of organic ions at the solid–liquid interface with supramolecular motifs that contain between 2 and 7 tectons.
Comparative STM studies of mixed ligand monolayers on gold nanoparticles in air and in 1-phenyloctane
Scanning tunnelling microscopy (STM) studies have found that stripe-like domains on gold nanoparticles (NPs) have the same characteristic length in air and in 1-phenyloctane.
Hydrogen-bonded clusters of ferrocenecarboxylic acid on Au(111)
A STM image of ferrocenecarboxylic acid clusters on Au(111), showing molecular clusters with both double-row and regular pentagonal geometries.
Massive conformational changes during thermally induced self-metalation of 2H-tetrakis-(3,5-di-tert-butyl)-phenylporphyrin on Cu(111)
2HTTBPP on Cu(111) behaves almost like a loaded spring which is held by the strong attractive interactions of the iminic nitrogens with the Cu substrate and is released upon metalation.
Nanoscale insight into C–C coupling on cobalt nanoparticles
A molecular-scale view of efficient and selective homocoupling of both aryl and benzyl groups on cobalt nanoparticles.
Anion-induced dimerization of 5-fold symmetric cyanostars in 3D crystalline solids and 2D self-assembled crystals
Anions stabilize stacking of C5-symmetric macrocycles, called cyanostars, into dimers in solution, in solid-state crystals, and in bilayers at the solution–graphite interface.
Convergent and divergent two-dimensional coordination networks formed through substrate-activated or quenched alkynyl ligation
Ni–alkynyl coordination can be quenched or activated depending on the metal surface leading to long-range ordered or random networks, respectively.
An STM study of molecular exchange processes in organic thin film growth
PCBM molecules deposited on an exTTF layer grown on Au(111) exchange places with the exTTF molecules, expelling them to the outer surface, even at 150 K, when the surface diffusion of the exTTF molecules is completely frozen.
Nano-scale characterization of binary self-assembled monolayers under an ambient condition with STM and TERS
Gold surfaces were modified by benzyl-mercaptan (BM) and then partly replaced with benzenethiol (BT), which formed binary self-assembled monolayers (SAM).
A silver nanowire-based tip suitable for STM tip-enhanced Raman scattering
A chemically synthesized silver nanowire was used for atomic-resolution STM imaging and tip-enhanced Raman scattering (TERS) spectroscopy, yielding excellent reproducibility.
Controlling two-phase self-assembly of an adenine derivative on HOPG via kinetic effects
Large-area self-assembled structures of a nucleobase adenine derivative were successfully realized through vacuum deposition.
Bimolecular porous supramolecular networks deposited from solution on layered materials: graphite, boron nitride and molybdenum disulphide
Solution deposition and molecular resolution AFM of bimolecular supramolecular networks on layered materials including the insulating boron nitride surface.
Transformation of β-sheet structures of the amyloid peptide induced by molecular modulators
In this work we report the controlled modulation of secondary structures of the amyloid peptide by terminus molecular modulators.
Concentration dependent halogen-bond density in the 2D self-assembly of a thienophenanthrene derivative at the aliphatic acid/graphite interface
The supramolecular patterns of a thienophenanthrene derivative could be switched between dissimilar polymorphs with different halogen-bond densities by solution concentration at the aliphatic acid/graphite interface.
Self-assembled organic monolayers on epitaxial graphene with enhanced structural and thermal stability
Perylenetetracarboxylic diimide forms well-ordered self-assembled monolayers on epitaxial graphene with enhanced structural and thermal stability compared to previous perylene-based compounds.
2D conglomerate crystallization of heptahelicene
Two-dimensional homochiral nucleation and conglomerate crystallization of an unsubstituted all-carbon helicene on a metal surface is observed for the first time.
Tip-induced C–H activation and oligomerization of thienoanthracenes
The tip of a scanning tunneling microscope (STM) can be used to dehydrogenate freely-diffusing tetrathienoanthracene (TTA) molecules on Cu(111), trapping the molecules into metal-coordinated oligomeric structures.
Kagome-like lattice of π–π stacked 3-hydroxyphenalenone on Cu(111)
Three-dimensional arrangement of 3-HPLN on a 2D surface, involving π–π stacking and perpendicular molecule attachment, results in a Kagome lattice.
Adsorption and reaction of sub-monolayer films of an ionic liquid on Cu(111)
The reactive interaction of the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide [BMP][TFSA] with Cu(111) was investigated by scanning tunnelling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) under ultrahigh vacuum (UHV) conditions.
Step-by-step on-surface synthesis: from manganese phthalocyanines to their polymeric form
On-surface reaction of tetracyanobenzene molecules with Mn atoms is presented.
Coordination reaction between tetraphenylporphyrin and nickel on a TiO2(110) surface
Reaction of tetraphenylporphyrin with nickel on TiO2(110) results in the formation of nickel(II)-tetraphenylporphyrin and a 45° rotation of the molecule.
Covalent, sequence-specific attachment of long DNA molecules to a surface using DNA-templated click chemistry
We present a novel method that covalently and sequence-specifically attaches long DNA molecules to a surface that is compatible with high-resolution atomic force microscopy (AFM) imaging.
Covalent assembly of a two-dimensional molecular “sponge” on a Cu(111) surface: confined electronic surface states in open and closed pores
We present a new class of on-surface covalent reactions, formed between diborylene-3,4,9,10-tetraaminoperylene and trimesic acid on Cu(111), which gives rise to a porous 2D-‘sponge’.
On-surface Ullmann polymerization via intermediate organometallic networks on Ag(111)
The role of organometallic intermediates during on-surface polymerization via Ullmann coupling was studied on Ag(111).
Growth dynamics in supersonic molecular beam deposition of pentacene sub-monolayers on SiO2
Studying highly energetic pentacene impinging on a surface, we demonstrated that the perpendicular component of the momentum drives the nucleation process, while the parallel component governs the sticking coefficient and the island fractality.
Dynamic rearrangement of bilayers of porphyrin hetero-dimers at a solid/liquid interface
Porphyrin hetero-dimers self-assemble into bilayers that dynamically rearrange at a solid/liquid interface.
Height dependent molecular trapping in stacked cyclic porphyrin nanorings
Stacked cyclic porphyrin nanorings function as traps for fullerene molecules dependent on stack height and diameter of the nanoring.
Segregation of Fischer–Tropsch reactants on cobalt nanoparticle surfaces
Scanning tunnelling microscopy reveals segregation of carbon monoxide and hydrogen, the two Fischer–Tropsch synthesis reactants, on cobalt nanoparticles at catalytically relevant coverages. Density functional theory calculations elucidate the energetics.
Supramolecular self-assembly of brominated molecules on a silicon surface
Hydrogen and halogen bonds have been associated for the growth of 2D compact supramolecular networks on a silicon surface.
Anisotropic growth of the thiophene-based layer on Si(111)–B
Large scale STM simulation of an anisotropic array of thiophene-based molecules on Si(111)–B.
Harnessing by a diacetylene unit: a molecular design for porous two-dimensional network formation at the liquid/solid interface
Alkoxy dehydroannulene derivatives harnessed by a diacetylene unit in each alkyl chain formed porous two-dimensional networks at the liquid–graphite interface.
A metal surface with chiral memory
Prochiral molecules locally induce a chiral restructuring of the Cu(110) surface that persists after removal of the molecules.
About this collection
This ChemComm themed collection, guest edited by Steven De Feyter, Nian Lin, Steven Tait, showcases the latest research covering all aspects of high resolution scanning probe microscopy (SPM) experiments of organic and inorganic molecules at surfaces. New articles will be added to this collection as they are published.