Local defects in water layers growing on metal surfaces have a key influence the wetting process at surfaces; however, such minor structures are undetectable by macroscopic methods. Here, we demonstrate ultrahigh-resolution imaging of single copper(110) surface using non-contact atomic force microscopy (AFM) with molecular functionalized tips 4.8 K. AFM probe tip terminated carbon monoxide predominantly images oxygen atoms, whereas contribution hydrogen atoms is modest. Oxygen skeletons...

A core-expanded, pyrrole-fused azacoronene analogue containing two unusual N-doped heptagons was obtained from commercially available octafluoronaphthalene and 3,4-diethylpyrrole in steps as a heteroatom-doped nonplanar nanographene. Full fusion with the formation of tetraazadipleiadiene framework longitudinally twisted structure unambiguously confirmed by single-crystal X-ray diffraction analysis. The edge-to-edge dihedral angle along acene moiety 63°. This electron-rich π-system showed...

Abstract Controlling the structural deformation of organic molecules can drive unique reactions that cannot be induced only by thermal, optical or electrochemical procedures. However, in conventional synthesis, including mechanochemical procedures, it is difficult to control skeletal rearrangement polycyclic aromatic hydrocarbons (PAHs). Here, we demonstrate a reaction scheme for PAHs on metal surface using high-resolution noncontact atomic force microscopy. By combination synthesis and...

Abstract Bottom-up synthesis of graphene nanoribbons (GNRs) may open new possibilities in future electronic devices owing to their tunable structure, which depends strongly on well-defined width and edge geometry. For instance, armchair-edged GNRs (AGNRs) exhibit width-dependent bandgaps. However, the bandgaps AGNRs synthesized experimentally so far are relatively large, well above 1 eV. Such a large bandgap deteriorate device performance due Schottky barriers carrier effective masses. Here,...

Tip-enhanced vibrational spectroscopy has advanced to routinely attain nanoscale spatial resolution, with tip-enhanced Raman even achieving atomic-scale and submolecular sensitivity. infrared techniques, such as nano-FTIR AFM-IR spectroscopy, have also enabled the chemical analysis of molecular monolayers, inorganic nanoparticles, protein complexes. However, fundamental limits nanospectroscopy in terms resolution sensitivity remained elusive, calling for a quantitative understanding...

We report tip-enhanced Raman spectroscopy of graphene nanoribbons (GNRs) fabricated on Au(111) by the on-surface polymerization technique under ultrahigh-vacuum conditions. The 0.74 nm wide armchair GNRs are directly observed scanning tunneling microscopy at room temperature, and characteristic vibration modes appear in both far- near-field (tip-enhanced) spectra. scattering is enhanced up to 4 × 105 near-field, while a strong intensity fluctuation (blinking) frequently emerges time series...

We demonstrated that a nitric oxide (NO) molecule on Cu(110) acts as an ``ON-OFF-ON toggle switch'' can be turned and off by repulsive force electron injection, respectively. On the surface, NO molecules exist in three configurations: flat along [001] direction (ON), upright (OFF), $[00\overline{1}]$ (ON). An NO-functionalized tip, which was characterized scanning tunneling microscopy inelastic spectroscopy, convert adsorbate into flat-lying NO. Atomic simulation of interactions between...

Controlling light emission from plasmonic nanojunctions is crucial for developing tunable nanoscale sources and integrated photonic applications. It requires precise engineering of nanocavity electrodes a detailed understanding electrically driven emission. Using scanning tunneling microscopy-induced luminescence (STML), we studied ultrathin ZnO/Ag(111) inside silver nanocavity. At positive bias, luminescence, caused by radiative decay localized surface plasmons (LSP), spectrally low-pass...

We have studied the local structure of ultrathin ZnO layers grown on Ag(111) by reactive deposition method using low-temperature scanning tunneling microscopy (STM) and noncontact atomic force (nc-AFM) at 5 K. The characteristic Moiré patterns arising from lattice mismatch between ZnO(0001) appear in STM, but it is not pronounced nc-AFM images. This indicates an atomically flat geometrical layer a dominant contribution electronic state to imaged STM. found that apparent height STM for...

Using a scanning tunneling microscope, we found metastable upright NO on Cu(110) with the $2{\ensuremath{\pi}}^{*}$ molecular resonance at Fermi level. Upon heating above 40 K, it converts to bent structure loss of resonance. By manipulating distance between two NO, controlled overlap orbitals and observed its splitting below level, thus visualizing covalent interaction them.

Using combined low-temperature scanning tunneling microscopy and Kelvin probe force we studied the local electronic structure work function change of (0 0 1)-oriented epitaxial ZnO layers on a Ag(1 1 1) substrate. Scanning spectroscopy (STS) revealed that conduction band minimum monotonically downshifts as number increases up to 4 monolayers (ML). However, it was found by field emission resonance (FER) slightly decreases for 2 ML thick but dramatically changes drops about 1.2 eV between 3...

Abstract Formic acid (HCOOH) can be catalytically decomposed into H 2 and CO is a promising hydrogen storage material. As production catalysts, Cu surfaces allow selective HCOOH decarboxylation; however, the on‐surface decomposition reaction pathway remains controversial. In this study, temperature dependence of HCOOH/Cu(111) adsorption structures elucidated by scanning tunneling microscopy non‐contact atomic force microscopy, establishing adsorbate chemical species using density functional...

Tip-enhanced Raman spectroscopy (TERS), combined with low-temperature scanning tunnelling microscopy (STM), has emerged as a highly sensitive method for chemical characterization, offering even sub-molecular resolution. However, its exceptional sensitivity is generally limited to molecules adsorbed onto plasmonic surfaces. Here we demonstrate single-molecule TERS fullerene (C

Scattering-type scanning near-field optical microscopy (s-SNOM) allows for the observation of response material surfaces with a resolution far below diffraction limit. A spatial 10-100 nm is routinely achieved in s-SNOM based on amplitude-modulation atomic force (AM-AFM) tapping amplitudes tens nanometers. However, imaging and spectroscopy structures that are localized to scale remain significant challenge. This can be overcome by combining field enhancement at atomic-scale structure tip...

Heterogeneous catalysis is inherently complex, and this makes it difficult to trace the reaction clarify mechanism. In study, we investigated reduction of nitric oxide (NO) by water on Cu(110) in a well-defined environment. Scanning tunnelling microscopy was used control image reaction, characterize product intermediate. A one-to-one yields characteristic NO–water which induces partial filling empty 2π* orbital NO, leading N–O bond weakening. Subsequent complex with another molecule further...

The adsorption configurations of heptahelicene ([7]H) molecules on Cu(001) are investigated with noncontact atomic force microscopy (ncAFM) and scanning tunneling (STM). Because the suppression thermal diffusion at 5 K, racemic [7]H exist as monomers, dimers, trimers, tetramers surface. terminal naphthaleno part molecule is attached horizontally to substrate so that two benzene ring centers located hollow sites, whereas other protruded toward a vacuum. A procedure for picking up from surface...

We report that NO molecules unexpectedly prefer a trimeric configuration on Cu(111). used scanning tunneling microscopy (STM) at 6 K, and confirmed the molecule is bonded to face-centered-cubic hollow site in an upright configuration. The individual imaged as ring protrusion, which characteristic of doubly degenerate 2π* orbital. A triangular trimer thermodynamically more favorable than monomer dimer, its bonding structure was characterized by STM manipulation. This unique behavior Cu(111)...

Determination of the adsorption structure water molecules on metal surfaces is an imperative challenge to understanding mechanisms wetting process and water-related heterogeneous catalysis. We identify monolayers formed Ni(111) via low-temperature atomic force microscopy, which enables visualization individual in with higher spatial resolution than scanning tunneling microscopy. On terraces at 150 K, forms comprising fused pentagonal, hexagonal, heptagonal rings. Water adsorbates step sites...

Understanding the precise atomic structure of ice surfaces is critical for revealing mechanisms physical and chemical phenomena at surfaces, such as growth, melting, reactions. Nevertheless, no conclusive has been established. In this study, noncontact force microscopy was used to address characterization structures Ih(0001) Ic(111) surfaces. The topmost hydrogen atoms are arranged with a short-range (2 × 2) order, independent thickness growth substrates used. electrostatic repulsion between...

We report a systematic study of small hydroxyl clusters on Cu(110), with scanning tunneling microscopy experiments and density functional theory calculations. Hydroxyl are stabilized via hydrogen bonding, their stability depends the number constituent groups. reveal that there is competition between groups in accepting bonds, resulting weak bonding odd-number stable dimer unit(s) even-number clusters, as metal surface singly charged has ability to form strong bond. Similar trends were found...

Using low-temperature scanning tunneling microscopy (STM), the adsorption and reaction of hydrogen sulfide (H₂S) its fragments (SH S) on Cu(110) are investigated at 5 K.

Atomic-scale characterization of products by scanning probe microscopy clarified that the quality on-surface-synthesised graphene nanoribbons was improved increasing precursor deposition amount.

An interface of molecule and metal has attracted much attention in the research field nanoelectronics because their high degree design freedom. Here, we demonstrate an efficient spin-to-charge current conversion at surface covered by a single layer molecules. Spin currents are injected into between (Cu) lead(II) phthalocyanine means spin pumping method. observed voltage signal is caused inverse Edelstein effect, i.e., interface. The coefficient, length, estimated to be 0.40 ± 0.06 nm,...