Excitation energy transfer between monomolecular layers of light harvesting LH2 and LH1-reaction centre complexes printed on a glass substrate

Remarkably stable artificial light-harvesting arrays capable of harvesting and trapping solar energy were fabricated using purified bacterial pigment–protein complexes.

Structure and Charge Transport Properties of CycloParaPhenylene Monolayers on Graphite

<pre>We theoretically investigate, by means of atomistic molecular dynamics simulations employing a tailored and benchmarked force field, the nanoscale organization of cycloparaphenylene molecules when physisorbed on a graphite surface. The landing of a single molecule is first considered, to progressively deposit more molecules to finally reach the full coverage of the surface. This protocol allows to study, consequently, the mechanism and structural pattern of their self-aggregation. The interfacial morphologies obtained are then analyzed in terms of the electronic coupling between neighboring molecules, allowing thus to provide information about the associated charge-transfer phenomena which could take place in these highly organized monomolecular layers.</pre>

Structure and Charge Transport Properties of CycloParaPhenylene Monolayers on Graphite

<pre>We theoretically investigate, by means of atomistic molecular dynamics simulations employing a tailored and benchmarked force field, the nanoscale organization of cycloparaphenylene molecules when physisorbed on a graphite surface. The landing of a single molecule is first considered, to progressively deposit more molecules to finally reach the full coverage of the surface. This protocol allows to study, consequently, the mechanism and structural pattern of their self-aggregation. The interfacial morphologies obtained are then analyzed in terms of the electronic coupling between neighboring molecules, allowing thus to provide information about the associated charge-transfer phenomena which could take place in these highly organized monomolecular layers.</pre>

Supramolecular architectures of molecularly thin yet robust free-standing layers

Stable, single-nanometer thin, and free-standing two-dimensional layers with controlled molecular architectures are desired for several applications ranging from (opto-)electronic devices to nanoparticle and single-biomolecule characterization. It is, however, challenging to construct these stable single molecular layers via self-assembly, as the cohesion of those systems is ensured only by in-plane bonds. We herein demonstrate that relatively weak noncovalent bonds of limited directionality such as dipole-dipole (–CN⋅⋅⋅NC–) interactions act in a synergistic fashion to stabilize crystalline monomolecular layers of tetrafunctional calixarenes. The monolayers produced, demonstrated to be free-standing, display a well-defined atomic structure on the single-nanometer scale and are robust under a wide range of conditions including photon and electron radiation. This work opens up new avenues for the fabrication of robust, single-component, and free-standing layers via bottom-up self-assembly.

Особенности морфологии и оптических свойств наноструктур дисульфида молибдена от мономолекулярного слоя до фрактолообразной субструктуры

The aim of the work is to show the effect of layer thickness on the features of the morphology and optical properties of MoS2 nanostructures, including the monomolecular layers, formed during the gas transporting transfer of sulfur vapors to the reactor hot zone with a molybdenum metal and subsequent deposition on the mica (muscavite) substrates. The results of the atomic force microscopy, optical absorption spectroscopy and Raman spectroscopy of molybdenum disulfide nanostructures of different thickness, obtained in temperatures interval of gas transport synthesis 525-600°C, show that a monomolecular MoS2 layers, containing trigonal domains and having a width of the band gap 1.84 eV at a direct-gap optical transition with the formation of excitons at room temperature, can be obtained. For the first time, fractal-like substructures were obtained, in the Raman spectra of which the values of the modes of intralayer and interlayer oscillations E12g 377.5 cm-1 and A1g 403.8 differ not only from the corresponding values of the modes of the monomolecular layer, but also from the known values of bulk samples. The frequency of the intralayer mode in these samples, E12g 377.5 cm-1, is the smallest of all known values.

Structure and Charge Transport Properties of CycloParaPhenylene Monolayers on Graphite

<pre>We theoretically investigate, by means of atomistic molecular dynamics simulations employing a tailored and benchmarked force field, the nanoscale organization of cycloparaphenylene molecules when physisorbed on a graphite surface. The landing of a single molecule is first considered, to progressively deposit more molecules to finally reach the full coverage of the surface. This protocol allows to study, consequently, the mechanism and structural pattern of their self-aggregation. The interfacial morphologies obtained are then analyzed in terms of the electronic coupling between neighboring molecules, allowing thus to provide information about the associated charge-transfer phenomena which could take place in these highly organized monomolecular layers.</pre>

Structure and Charge Transport Properties of CycloParaPhenylene Monolayers on Graphite

<pre>We theoretically investigate, by means of atomistic molecular dynamics simulations employing a tailored and benchmarked force field, the nanoscale organization of cycloparaphenylene molecules when physisorbed on a graphite surface. The landing of a single molecule is first considered, to progressively deposit more molecules to finally reach the full coverage of the surface. This protocol allows to study, consequently, the mechanism and structural pattern of their self-aggregation. The interfacial morphologies obtained are then analyzed in terms of the electronic coupling between neighboring molecules, allowing thus to provide information about the associated charge-transfer phenomena which could take place in these highly organized monomolecular layers.</pre>

Интеркалирование молекул фуллеренa С-=SUB=-60-=/SUB=- под однослойный графен на карбиде молибдена

It is shown that heating of a fullerite film several monomolecular layers thick deposited onto single-layer graphene formed on a substrate of molybdenum carbide Mo_2C at T = 700–800 K leads to the intercalation of C_60 molecules under the graphene layer. The direct deposition of C_60 molecules at T = 650 K also leads to the intercalation of C_60 molecules under graphene; the maximal amount of fullerene accumulated under graphene is one single layer.