A new class of double-wheel molecules is manipulated on a Au(111) surface by the tip of a scanning tunneling microscope (STM) at low temperature. The double-wheel molecule consists of two subphthalocyanine wheels connected by a central rotation carbon axis. Each of the subphthalocyanine wheels has a nitrogen tag to monitor its intramolecular rolling during an STM manipulation sequence. The posi...

The essentiality of boron for higher plants was demonstrated (1) in 1910 and extensively verified in the two succeeding decades. Since then a voluminous literature has accrued concerning the anatomical, morphological, and biochemical alterations of boron-deficient plants. Inasmuch as they are not pertinent to the following report, many of the specific or general roles that have been postulated ...

The family of wheel-and-axle host molecules is reviewed and the approaches to the creation of new host geometries for supramolecular materials based on weaker interactions are discussed. The combination of bulky groups (or platforms) and spacers yields various host geometries including humming-top molecules (Werner complexes, metal dibenzoylmethanates and other bis-chelates, dimeric metal carbo...

Near-field spectroscopy has been extensively applied recently to analyze collective optical properties of materials at the nanoscale. However, vibrations small molecules were only recognizable in close proximity a metallic resonator. We show that encapsulation boron nitride nanotubes (BNNT) enhances near-field vibrational spectra C$_{60}$ fullerene, reaching sensitivity limit few hundred molecu...

Although they were first reported in 1963, molecules with a boron-oxygen-nitrogen dimeric backbone do not seem to have been investigated seriously in terms of thermodynamic properties. Here we report on the calculated structures and properties, including thermodynamics, of several so-called "BON-BON" molecules. With the popularity of nitrogen-containing substituents on new high-energy materials...

We suggest the possibility to build graphene analogue with planar hexacoordinate wheel-type Fe@B6H6 cluster as building block through studying theoretically geometry, stability, and electron structure of its dimer trimer well dimerization two trimers. Employing dehydrogenation route polymerization, we can obtain hexagonal boron sheet that are partly uniformly filled by Fe atoms in center holes,...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Fabian Schulz Name of the doctoral dissertation Ultra-thin insulating layers of hexagonal boron nitride for high-resolution scanning tunneling spectroscopy Publisher School of Science Unit Department of Applied Physics Series Aalto University publication series DOCTORAL DISSERTATIONS 163/2016 Field of research Manuscript submi...

Grinding is one of the effective manufacturing processes with which to produce highly accurate parts an ultra-fine surface finish. The tool used remove materials in grinding called wheel. Abrasive grains made extremely hard (alumina, silica, cubic boron nitride, and diamond) having a definite grit size but random shape are bonded on circumferential fabrication process controlled so that wheel e...