Probing the magnetic superexchange couplings between terminal Cu^II ions in heterotrinuclear bis(oxamidato) type complexes

• Mohammad A. Abdulmalic,
• Saddam Weheabby,
• Francois E. Meva,
• Azar Aliabadi,
• Vladislav Kataev,
• Bernd Büchner,
• Frederik Schleife,
• Berthold Kersting and
• Tobias Rüffer

Beilstein J. Nanotechnol. 2017, 8, 789–800, doi:10.3762/bjnano.8.82

• ; magnetic superexchange coupling; molecular structure; Introduction Significant synthetic efforts have been directed to the synthesis of polynuclear species in which the metal ions are bridged by oxamato, oxamido, oxalato or dithiooxalato ligand [1][2][3][4]. In this context, the so-called bis(oxamato

Biological and biomimetic materials and surfaces

• Stanislav Gorb and
• Thomas Speck

Beilstein J. Nanotechnol. 2017, 8, 403–407, doi:10.3762/bjnano.8.42

• are covalently cross-linked by dityrosine and trityrosine. Due to this molecular structure, resilin bears a high flexibility and resilience. The review by Michels et al. summarizes the presence of resilin and its functional significance in membrane and joint systems, jumping and catapulting systems

Tailoring bifunctional hybrid organic–inorganic nanoadsorbents by the choice of functional layer composition probed by adsorption of Cu²⁺ ions

• Veronika V. Tomina,
• Inna V. Melnyk,
• Yuriy L. Zub,
• Aivaras Kareiva,
• Miroslava Vaclavikova,
• Gulaim A. Seisenbaeva and
• Vadim G. Kessler

Beilstein J. Nanotechnol. 2017, 8, 334–347, doi:10.3762/bjnano.8.36

• molecular structure of the surfaces. It was demonstrated that the introduction of short hydrophobic (methyl) groups improves the kinetic characteristics of the samples during the sorption of copper(II) ions and promotes fixation of aminopropyl groups on the surface of silica microspheres. The introduction

• Information File 1). It can be deduced that the introduction of a silane bearing a hydrophobic group possibly favors nucleation over growth and results in relatively smaller particles. Molecular structure of the functional layers from IR and NMR data IR spectroscopy was used to identify the presence of

• offer generally smaller particles. Their surface is apparently porous when methyl groups are introduced as co-ligand and becomes smoother when perfluoroalkyl groups are applied, especially when their coverage fraction is increased. The molecular structure of the bifunctional layers depends strongly on

Comparison of four functionalization methods of gold nanoparticles for enhancing the enzyme-linked immunosorbent assay (ELISA)

• Paula Ciaurriz,
• Fátima Fernández,
• Edurne Tellechea,
• Jose F. Moran and
• Aaron C. Asensio

Beilstein J. Nanotechnol. 2017, 8, 244–253, doi:10.3762/bjnano.8.27

• /n, Pamplona 31006, Spain 10.3762/bjnano.8.27 Abstract The enzyme-linked immunosorbent assay (ELISA) technique is based on the specific recognition ability of the molecular structure of an antigen (epitope) by an antibody and is likely the most important diagnostic technique used today in bioscience

Photo-ignition process of multiwall carbon nanotubes and ferrocene by continuous wave Xe lamp illumination

• Paolo Visconti,
• Patrizio Primiceri,
• Daniele Longo,
• Luciano Strafella,
• Paolo Carlucci,
• Mauro Lomascolo,
• Arianna Cretì and
• Giuseppe Mele

Beilstein J. Nanotechnol. 2017, 8, 134–144, doi:10.3762/bjnano.8.14

• with CNTs mixed with different fuel mixtures (i.e., hexane/acetone, ethylene/air). On the other hand, ferrocene (FeCp2), whose molecular structure is shown in Figure 1, was the first pure hydrocarbon derived from iron and was accidentally discovered in 1951 [16]. Starting from its discovery, many other

• , the formation of radical species, which easily react with oxygen, triggers the combustion process of the mixture. Ferrocene molecular structure (a) and its view as a 3D model (b). Ferrocene diluted in toluene (left) and ferrocene diluted in water (right) after sonication operation. Absorption spectra

Surface-enhanced Raman scattering of self-assembled thiol monolayers and supported lipid membranes on thin anodic porous alumina

• Marco Salerno,
• Amirreza Shayganpour,
• Barbara Salis and
• Silvia Dante

Beilstein J. Nanotechnol. 2017, 8, 74–81, doi:10.3762/bjnano.8.8

• plasmon resonances of this thin film, emerges. The same effect may also be used on the SLBs, at the later stage of the model system fabrication. For the selected lipids, we first tested the Raman spectra of the powders and then of the SLB form, on both the flat Au and nanoporous tAPA–Au. The molecular

• structure and Raman spectra of lipids in powder form are shown in Figure 3. The molecules of choice, i.e., POPC and POPS, are two glycerophospholipids largely present in real cellular membranes. In particular, we prepared a mixture of POPC and POPS suspended in PBS with the molar ratio of 8:2, in order to

Intercalation and structural aspects of macroRAFT agents into MgAl layered double hydroxides

• Dessislava Kostadinova,
• Ana Cenacchi Pereira,
• Muriel Lansalot,
• Franck D’Agosto,
• Elodie Bourgeat-Lami,
• Fabrice Leroux,
• Christine Taviot-Guého,
• Sylvian Cadars and
• Vanessa Prevot

Beilstein J. Nanotechnol. 2016, 7, 2000–2012, doi:10.3762/bjnano.7.191

• compared to pristine MgAl-NO3 LDH from 1.36 nm to 2.33 nm. Depending on the nature of the units involved into the macroRAFT copolymer (only AA or AA and BA), the intercalation led to monolayer or bilayer arrangements within the interlayer space. The macroRAFT intercalation and the molecular structure of

• Fullprof suite program [57]. ChemBio 3D Ultra suite program was used to draw the molecular structure of macroRAFT copolymers, running MM2 energy-minimization. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra were measured in the range 400–4000 cm−1 on a FTIR Nicolet 5700 (Thermo

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

• Jakub S. Prauzner-Bechcicki,
• Lukasz Zajac,
• Piotr Olszowski,
• Res Jöhr,
• Antoine Hinaut,
• Thilo Glatzel,
• Bartosz Such,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2016, 7, 1642–1653, doi:10.3762/bjnano.7.156

• mention quite recent results reported for another perylene-derivative, namely perylene di-imide (PTCDI) [34][35]. The difference in the molecular structure between PTCDA and PTCDI seems to be small, i.e., an oxygen atom linking carbon atoms in an anhydride group is exchanged by pyrrolic (N–H) nitrogen

Filled and empty states of Zn-TPP films deposited on Fe(001)-p(1×1)O

• Gianlorenzo Bussetti,
• Alberto Calloni,
• Rossella Yivlialin,
• Andrea Picone,
• Federico Bottegoni and
• Marco Finazzi

Beilstein J. Nanotechnol. 2016, 7, 1527–1531, doi:10.3762/bjnano.7.146

• studied the growth of Zn-TPP (the molecular structure is reported in Figure 1), a well-characterized and studied porphyrin, on a prototypical ultrathin MO substrate, namely Fe(001)-p(1×1)O [10]. On this surface, oxygen atoms are placed between four metal atoms, slightly above the Fe(001) uppermost layer

Effect of tetramethylammonium hydroxide/isopropyl alcohol wet etching on geometry and surface roughness of silicon nanowires fabricated by AFM lithography

• Siti Noorhaniah Yusoh and
• Khatijah Aisha Yaacob

Beilstein J. Nanotechnol. 2016, 7, 1461–1470, doi:10.3762/bjnano.7.138

• ) reaction. The TMAH solution has the molecular structure of (CH3)4NOH and contains the hydroxide ion (OH−) that is useful for etching silicon. The oxidation will occur when hydroxyls react with the silicon surface to form a silicate (Equation 1). Then, the water reduction reaction occurs to produce

Phenalenyl-based mononuclear dysprosium complexes

• Yanhua Lan,
• Andrea Magri,
• Olaf Fuhr and
• Mario Ruben

Beilstein J. Nanotechnol. 2016, 7, 995–1009, doi:10.3762/bjnano.7.92

• Union Road, Cambridge CB21EZ, UK (fax: (+(44)1223-336-033; email: deposit@ccdc.cam.ac.uk). Molecular structure of complex 1 obtained by single crystal X-ray diffraction. Hydrogen atoms are omitted for clarity. Selected bond lengths [Å], angles [°]: Dy-Cl1 2.6983(5), Dy-O1 2.2517(18), Dy-O2 2.2647(14

• ), O1-Dy-O2 73.31(5), O3-Dy-O7 112.98(5), O1-Dy-O3 88.68(6), O4-Dy-O5 80.97(6), O1-Dy-O4 127.84(5), O4-Dy-O7 70.92(6), O1-Dy-O5 143.56(5), O5-Dy-O7 144.33(6), O1-Dy-O7 72.06(6). Molecular structure of complex 2 obtained by single crystal X-ray diffraction. Hydrogen atoms are omitted for clarity

• (12), O14-Dy2-O15 75.44(12), O10-Dy2-O15 120.73(12). Molecular structure of complex 3 obtained by single crystal X-ray diffraction. Hydrogen atoms are omitted for clarity. Selected bond lengths [Å], angles [°]: Dy1-O1 2.347(3), Dy1-O2 2.332(4), Dy1-O3 2.337(3), Dy1-O4 2.339(4), Dy1-O5 2.317(4), Dy1-O6

Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate

• Rainhard Machatschek,
• Patrick Ortmann,
• Renate Reiter,
• Stefan Mecking and
• Günter Reiter

Beilstein J. Nanotechnol. 2016, 7, 784–798, doi:10.3762/bjnano.7.70

• were oriented perpendicular to the lamellar fold surface. The tendency to form double layers may be caused by the asymmetric molecular structure of the perylene monoimide 1. Thus, chemical functionalization of annealed CPE45 single crystals allowed for the formation of compact layers of semiconducting

Organized films

• Maurizio Canepa and
• Helmuth Möhwald

Beilstein J. Nanotechnol. 2016, 7, 406–408, doi:10.3762/bjnano.7.35

• extensive development of scanning probe methods in the late 1980s. With these methods, one could learn much more about details of the molecular structure and the surface order [12][13], penetrating the nanoscale realm. Furthermore, AFM in particular enabled continuous developments in manipulating and

Rigid multipodal platforms for metal surfaces

• Michal Valášek,
• Marcin Lindner and
• Marcel Mayor

Beilstein J. Nanotechnol. 2016, 7, 374–405, doi:10.3762/bjnano.7.34

• tetraphenylmethane with three acetylsulfanylmethyl groups 36 (Figure 15) for surface attachment to examine the effects of spatial arrangement of the molecular structure on charge storage in SAMs [72]. The redox-active molecules include ferrocene, zinc porphyrins, magnesium phthalocyanine, and triple-decker

Surface coating affects behavior of metallic nanoparticles in a biological environment

• Darija Domazet Jurašin,
• Marija Ćurlin,
• Ivona Capjak,
• Tea Crnković,
• Marija Lovrić,
• Michal Babič,
• Daniel Horák,
• Ivana Vinković Vrček and
• Srećko Gajović

Beilstein J. Nanotechnol. 2016, 7, 246–262, doi:10.3762/bjnano.7.23

• coatings, (b) to employ coatings of different chemical functionality, i.e., polymers, surfactants, small ionic molecules, (c) to include coatings of different hydrophilic–hydrophobic balance in molecular structure. The selected coating agents enabled us to investigate the influence of electrostatic and/or

• negative charge and high adsorption strength of coating agents alongside molecular structure are important factors that impart good colloidal stability of metallic NPs in electrolyte-rich fluids. Moreover, DLS, ELS and TEM proved to be sufficient and fast screening methods for a colloidal stability

Mismatch detection in DNA monolayers by atomic force microscopy and electrochemical impedance spectroscopy

• Maryse D. Nkoua Ngavouka,
• Pietro Capaldo,
• Elena Ambrosetti,
• Giacinto Scoles,
• Loredana Casalis and
• Pietro Parisse

Beilstein J. Nanotechnol. 2016, 7, 220–227, doi:10.3762/bjnano.7.20

• of the DNA layer, the other more sensitive to its charge density) let us conclude that the structural deformations related to a single mismatch have a strong influence on the charge distribution only, leaving the molecular structure not significantly affected. Schematics of the atomic force

Single-molecule magnet behavior in 2,2’-bipyrimidine-bridged dilanthanide complexes

• Wen Yu,
• Frank Schramm,
• Eufemio Moreno Pineda,
• Yanhua Lan,
• Olaf Fuhr,
• Jinjie Chen,
• Hironari Isshiki,
• Wolfgang Wernsdorfer,
• Wulf Wulfhekel and
• Mario Ruben

Beilstein J. Nanotechnol. 2016, 7, 126–137, doi:10.3762/bjnano.7.15

• = Gd(III) 1; Tb(III) 2; Dy(III) 3; Ho(III) 4 and Er(III) 5) to 2,2'-bipyrimidine and stirring the mixture in EtOH overnight. The molecular structure of compounds 1–5 is isostructural and the complexes crystallize in two different unit cells depending on the lanthanide source. Compounds 2, 3, and 5

• crystallize in the triclinic space group, while 4 crystallizes in the monoclinic P21 space group; a behavior that can be attributed to the lanthanide contraction along the series of f-elements. The molecular structure of 3 is given here in detail as a representative case for all compounds 1–5 (see Figure 1

• . Scanning tunneling microscopy of [Tb(tmhd)3]2bpm Scanning tunneling microscopy (STM) studies were performed at 5 K to investigate the structure and behavior of the compound at the single-molecule level. Several repetitions of the experiments suggested that the original molecular structure of 2 is

Effects of electronic coupling and electrostatic potential on charge transport in carbon-based molecular electronic junctions

• Richard L. McCreery

Beilstein J. Nanotechnol. 2016, 7, 32–46, doi:10.3762/bjnano.7.4

• ; Introduction The field of Molecular Electronics investigates the behavior of molecules as elements in electronic circuits, with the intent of exploiting variations of molecular structure to realize unusual electronic functions [1][2][3][4]. Charge transport through single molecules and through ensembles of

• absence of the AB molecule. In order to assess the effects of molecular structure on electronic coupling, several series of oligomers between G9 fragments were calculated, which differ in the degree of conjugation, including alkanes, alkene, and alkynes, with the results summarized in Table 4 and Figure 7

• . The optimized geometries for G9–molecule–G9 models with variations in molecular structure often have significant dihedral angles between the G9 planes, which complicates interpretation of molecular structural effects on electronic coupling. For this reason, further comparisons considered below were

Sub-monolayer film growth of a volatile lanthanide complex on metallic surfaces

• Hironari Isshiki,
• Jinjie Chen,
• Kevin Edelmann and
• Wulf Wulfhekel

Beilstein J. Nanotechnol. 2015, 6, 2412–2416, doi:10.3762/bjnano.6.248

• group metal) β-dikenonate with low-temperature STM [11]. Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)lanthanide(III) (Ln(thd)3) has the simplest molecular structure among them and is highly volatile thermally stability [12][13]. In this molecule, the lanthanide(III) ion is coordinated by three β

Two step formation of metal aggregates by surface X-ray radiolysis under Langmuir monolayers: 2D followed by 3D growth

• Smita Mukherjee,
• Marie-Claude Fauré,
• Michel Goldmann and
• Philippe Fontaine

Beilstein J. Nanotechnol. 2015, 6, 2406–2411, doi:10.3762/bjnano.6.247

• monolayer. GIXD was used to obtain in-plane information about the molecular structure of the surface. The spectra were obtained by varying the X-ray, momentum transfer, in-plane component qxy that is parallel to the air–water interface. The scattered intensity was measured as a function of the angle, 2θ

Negative differential electrical resistance of a rotational organic nanomotor

• Hatef Sadeghi,
• Sara Sangtarash,
• Qusiy Al-Galiby,
• Rachel Sparks,
• Steven Bailey and
• Colin J. Lambert

Beilstein J. Nanotechnol. 2015, 6, 2332–2337, doi:10.3762/bjnano.6.240

• –angle curves, the pendant group was artificially rotated to a chosen angle and then the molecule was allowed to relax to a local energy minimum. (a) The molecular structure within the junction. (b) A contour plot of the local density of states of the gas-phase molecule at θ = 60° (right) and θ = 0

Orthogonal chemical functionalization of patterned gold on silica surfaces

• Francisco Palazon,
• Didier Léonard,
• Thierry Le Mogne,
• Francesca Zuttion,
• Céline Chevalier,
• Magali Phaner-Goutorbe,
• Éliane Souteyrand,
• Yann Chevolot and
• Jean-Pierre Cloarec

Beilstein J. Nanotechnol. 2015, 6, 2272–2277, doi:10.3762/bjnano.6.233

• : – When the sample was simultaneously functionalized with a perfluorinated thiol and a PEG/silane (Figure 2) 1. On gold (left spectrum), fluorine is clearly present as evidenced by the F 1s and F KLL peaks, showing the presence of the perfluorinated thiol (F-thiol, molecular structure given above the

A simple and efficient quasi 3-dimensional viscoelastic model and software for simulation of tapping-mode atomic force microscopy

• Santiago D. Solares

Beilstein J. Nanotechnol. 2015, 6, 2233–2241, doi:10.3762/bjnano.6.229

• interactions. A few examples of these processes include viscoelastic deformation, irreversible molecular structure changes (e.g., in biomolecules) and plastic deformation in crystals. These phenomena bring challenges into AFM characterization primarily in two ways. First, in delicate samples, such as

A single-source precursor route to anisotropic halogen-doped zinc oxide particles as a promising candidate for new transparent conducting oxide materials

• Daniela Lehr,
• Markus R. Wagner,
• Johanna Flock,
• Julian S. Reparaz,
• Clivia M. Sotomayor Torres,
• Alexander Klaiber,
• Thomas Dekorsy and
• Sebastian Polarz

Beilstein J. Nanotechnol. 2015, 6, 2161–2172, doi:10.3762/bjnano.6.222

• equivalent resulting in one distinct signal in 1H and 13C NMR, there are now two different tert-butoxy groups with a ratio of 3:1 in 2a and slightly different chemical shifts (Figure S1, Supporting Information File 1). Further evidence of the molecular structure results from comparison and analysis of the FT

Nanofibers for drug delivery – incorporation and release of model molecules, influence of molecular weight and polymer structure

• Jakub Hrib,
• Jakub Sirc,
• Radka Hobzova,
• Zuzana Hampejsova,
• Zuzana Bosakova,
• Marcela Munzarova and
• Jiri Michalek

Beilstein J. Nanotechnol. 2015, 6, 1939–1945, doi:10.3762/bjnano.6.198

• PVA with water molecules during immersion – the PVA molecular structure contains hydroxy groups, which interact with water molecules at the expense of the interaction with PEG molecules, which are consequently released faster. The lower polarity of PCL and PLA and therefore weaker interaction with