Impact of air exposure and annealing on the chemical and electronic properties of the surface of SnO₂ nanolayers deposited by rheotaxial growth and vacuum oxidation

• Monika Kwoka and
• Maciej Krzywiecki

Beilstein J. Nanotechnol. 2017, 8, 514–521, doi:10.3762/bjnano.8.55

• results in SnO2 nanolayers of controlled nonstoichiometry/stoichiometry depending on the intended application. This paper presents the X-ray photoelectron spectroscopy (XPS) results on the variation of surface chemistry and electronic properties of RGVO SnO2 nanolayers after exposure to air and subsequent

• an increase of the water and carbon contaminations, which were in their majority desorbed during UHV annealing. Hence, our studies proved that the SnO2 nanolayers are not susceptible to significant air-induced contaminations. Moreover, the electronic properties of RGVO nanolayers were changed upon

Tunable plasmons in regular planar arrays of graphene nanoribbons with armchair and zigzag-shaped edges

• Cristian Vacacela Gomez,
• Michele Pisarra,
• Mario Gravina and
• Antonello Sindona

Beilstein J. Nanotechnol. 2017, 8, 172–182, doi:10.3762/bjnano.8.18

• arrays'). Results and Discussion Theoretical framework Our TDDFT approach is divided into two steps. First, the (ground-state) electronic properties of the different GNRs (and graphene) are obtained by DFT. Second, the basic equation of linear-response theory in the RPA is employed, with a corrected

• Brillouin zone (1st BZ), and the reciprocal lattice vectors G associated to the three-dimensional (3D) crystal of unit-cell volume Ω0. The ground-state electronic properties of the different GNRs (as well as graphene) are computed within the local density approximation (LDA), being defined by the Perdew

• the C–C bond length by about 0.5%, to account for stretching effects. As for intrinsic graphene, the C–C bond length and out-of-plane lattice constant are fixed to 1.42 Å and 15 Å, respectively. The self-consistent run is performed on a 60 × 60 × 1 MP-grid, and the KS electronic properties are then

Nitrogen-doped twisted graphene grown on copper by atmospheric pressure CVD from a decane precursor

• Ivan V. Komissarov,
• Nikolai G. Kovalchuk,
• Vladimir A. Labunov,
• Ksenia V. Girel,
• Olga V. Korolik,
• Mikhail S. Tivanov,
• Algirdas Lazauskas,
• Mindaugas Andrulevičius,
• Tomas Tamulevičius,
• Viktoras Grigaliūnas,
• Šarunas Meškinis,
• Sigitas Tamulevičius and
• Serghej L. Prischepa

Beilstein J. Nanotechnol. 2017, 8, 145–158, doi:10.3762/bjnano.8.15

• also discussed. Keywords: G-resonance; nitrogen doping of graphene; Raman spectroscopy; twisted graphene; X-ray photoemission spectroscopy; Introduction Single layer graphene (SLG) exhibits exceptional electronic properties, making it one of the most advanced materials of our time. Due to its high

• charge carrier mobility [1], it has huge functional ability in many applications, especially in high frequency electronics. The increase in the number of layers with conventional Bernal stacking strongly affects the electronic properties of graphene. Contrary to monolayer graphene, in Bernal-stacked

• areas), while the surface of sample B looks relatively homogeneous. More information about the quality of the samples can be obtained from the Raman investigations. The resonance nature of Raman spectra in graphene makes them a versatile tool for studying both structural and electronic properties [22

Ordering of Zn-centered porphyrin and phthalocyanine on TiO₂(011): STM studies

• Piotr Olszowski,
• Lukasz Zajac,
• Szymon Godlewski,
• Bartosz Such,
• Rémy Pawlak,
• Antoine Hinaut,
• Res Jöhr,
• Thilo Glatzel,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2017, 8, 99–107, doi:10.3762/bjnano.8.11

• oxides. Recently various devices, such as light-emitting diodes [1], organic field effect transistors [2], and dye-sensitized solar cells [3], have been developed and commercialized. It is apparent that in almost all areas of utilization, the electronic properties of complex structures play a crucial

• with the aim to understand molecule–molecule and molecule–substrate interactions [6][7][8]. The strength and physicochemical character of such interactions determine the system geometrical structure and electronic properties; hence, detailed knowledge is necessary for optimization of the optoelectronic

Zigzag phosphorene nanoribbons: one-dimensional resonant channels in two-dimensional atomic crystals

• Carlos. J. Páez,
• Dario. A. Bahamon,
• Ana L. C. Pereira and
• Peter. A. Schulz

Beilstein J. Nanotechnol. 2016, 7, 1983–1990, doi:10.3762/bjnano.7.189

• , revealing an effective chain-like behavior of the edges of the nanoribbons. In what follows, we initially discuss the “bulk” electronic properties of a phosphorene nanoribbon. We present the model calculation framework, as well as the effects of edge coupling on the conductance of these infinite zigzag

• Rudenko [20] considering a Hamiltonian , where ci () is the creation (annihilation) electronic operator at site i and tij is the hopping integral between sites i and j. In this model, five hopping integrals are required to characterize the low-energy electronic properties [20]: t1 = −1.220 eV, t2 = 3.665

• contact ΣL(R) are calculated recursively for the semi-infinite zigzag phosphorene nanoribbons [23]. Other electronic properties such as the local density of states (LDOS) are also calculated. The electronic and transport properties of a host zizgzag nanoribbon, in which a finite segment will be latter

Monolayer graphene/SiC Schottky barrier diodes with improved barrier height uniformity as a sensing platform for the detection of heavy metals

• Ivan Shtepliuk,
• Jens Eriksson,
• Volodymyr Khranovskyy,
• Tihomir Iakimov,
• Anita Lloyd Spetz and
• Rositsa Yakimova

Beilstein J. Nanotechnol. 2016, 7, 1800–1814, doi:10.3762/bjnano.7.173

• electronic properties to a change in concentrations of surface functional groups and adsorbates. However, sensors based on reduced graphene oxide are only well investigated in terms of determination of the concentration limit of heavy metals and improving the response time [18][19][20][21][22][23][24][25][26

• determines the graphene thickness. It is obvious that increasing the graphene thickness from 1 ML to multilayered graphene causes a change of the electronic properties of the carbonaceous material (energy gap, work function) and, as a consequence, the Schottky barrier height. In this case, it is not easy to

• molecular orbital (LUMO). It should be mentioned that in reality Equation 6 is more complex, since the effect of buffer layer, doping, functional groups (hydroxyl, carboxyl and epoxy groups) on the electronic properties of graphene cannot be ignored. The ionization potential was estimated as the energy

Active and fast charge-state switching of single NV centres in diamond by in-plane Al-Schottky junctions

• Christoph Schreyvogel,
• Vladimir Polyakov,
• Sina Burk,
• Helmut Fedder,
• Andrej Denisenko,
• Felipe Fávaro de Oliveira,
• Ralf Wunderlich,
• Jan Meijer,
• Verena Zuerbig,
• Jörg Wrachtrup and
• Christoph E. Nebel

Beilstein J. Nanotechnol. 2016, 7, 1727–1735, doi:10.3762/bjnano.7.165

• state and hence of the optical and electronic properties of single and near-surface nitrogen-vacancy centres (NV centres) in diamond. This active manipulation is achieved by using a two-dimensional Schottky-diode structure from diamond, i.e., by using aluminium as Schottky contact on a hydrogen

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

• the molecules to the formation of a chemical bond via the dehydrogenation of the eight H atoms of the isoindole ligands, as a result of the increased substrate temperature during the deposition. Next, Ishida and Fujita investigated the electronic properties of individual molecules. The immobilized

• first layer are strongly coupled, whereas the FePcs in the second layer are not severely affected by bonding to the surface and exhibit bulk-like electronic properties. The electronic properties of the second and subsequent layers are favourable for DSSC applications. However, the strong coupling of the

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

• -up assembly of devices based on organic compounds. The molecule–surface interaction, however, can alter the electronic properties of the organic compound and/or the functionality of the electronic device. This effect is enhanced in molecules showing catalytic activity when the catalytic sites

• a template for the deposition of other organic molecules or (ii) as a buffer layer in flat organic devices. On the other hand, a detailed analysis of the electronic properties of the porphyrin single layer requires a reference sample for comparison. Generally, as well as in this paper, a thick

• (typically 20 ML) porphyrin film is used for this purpose [10][11]. There, the substrate is almost completely covered by porphyrins. The spectra acquired on thick films can be considered representative of the electronic properties of a hypothetical isolated molecule, since molecule–molecule interactions are

High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

• Bilel Chouchene,
• Tahar Ben Chaabane,
• Lavinia Balan,
• Emilien Girot,
• Kevin Mozet,
• Ghouti Medjahdi and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2016, 7, 1338–1349, doi:10.3762/bjnano.7.125

• , BP 70239, 54506 Vandoeuvre-lès-Nancy Cedex, France 10.3762/bjnano.7.125 Abstract Ce-doped ZnO (ZnO:Ce) nanorods have been prepared through a solvothermal method and the effects of Ce-doping on the structural, optical and electronic properties of ZnO rods were studied. ZnO:Ce rods were characterized

• reported [34][35][36]. The synthesis of particles with well-defined properties is also of high importance to control the photocatalytic activity. Their optical, chemical and electronic properties are actually strongly dependent on shape, size, crystalline structure, defect concentration, and surface area

Diameter-driven crossover in resistive behaviour of heavily doped self-seeded germanium nanowires

• Stephen Connaughton,
• Maria Koleśnik-Gray,
• Richard Hobbs,
• Olan Lotty,
• Justin D. Holmes and
• Vojislav Krstić

Beilstein J. Nanotechnol. 2016, 7, 1284–1288, doi:10.3762/bjnano.7.119

• ][5][6][7][8][9]. Germanium nanowires (Ge NWs) are of particular interest as they provide the prospect for quantum-related phenomena associated with one-dimensional (1D) confinement already at diameters of tens of nm [10], or determining their electronic properties by surface doping [11]. Among

Fabrication and characterization of branched carbon nanostructures

• Sharali Malik,
• Yoshihiro Nemoto,
• Hongxuan Guo,
• Katsuhiko Ariga and
• Jonathan P. Hill

Beilstein J. Nanotechnol. 2016, 7, 1260–1266, doi:10.3762/bjnano.7.116

• electronic properties, it is well known that in carbon nanotube networks the junction resistance controls the overall performance [17]. Therefore, in addition to b-MWCNTs/composite applications, the enhanced electrical properties of networks arising within this new material has major potential benefits for

Reasons and remedies for the agglomeration of multilayered graphene and carbon nanotubes in polymers

• Rasheed Atif and
• Fawad Inam

Beilstein J. Nanotechnol. 2016, 7, 1174–1196, doi:10.3762/bjnano.7.109

• in the hexagonal lattice along the vectors a1 and a2, respectively [40]. If n = m, the nanotube is called “armchair”. If m = 0, it is called “zigzag”, and in all other cases it is chiral. The chirality affects the transport properties, especially electronic properties. If (2n + m) is a multiple of 3

Multiwalled carbon nanotube hybrids as MRI contrast agents

• Nikodem Kuźnik and
• Mateusz M. Tomczyk

Beilstein J. Nanotechnol. 2016, 7, 1086–1103, doi:10.3762/bjnano.7.102

• both a diagnostic and therapeutic role. Nanomaterials have been found to be an excellent scaffold for contrast agents, among which carbon nanotubes offer vast possibilities. The morphology of multiwalled carbon nanotubes (MWCNTs), their magnetic and electronic properties, the possibility of different

Photocurrent generation in carbon nanotube/cubic-phase HfO₂ nanoparticle hybrid nanocomposites

• Protima Rauwel,
• Augustinas Galeckas,
• Martin Salumaa,
• Frédérique Ducroquet and
• Erwan Rauwel

Beilstein J. Nanotechnol. 2016, 7, 1075–1085, doi:10.3762/bjnano.7.101

• respect that theoretical calculations of the electronic properties of oxygen vacancies in monoclinic HfO2 [45] predict single- and double-ionized vacancy states at 4.7 eV and 4.9 eV above the valence band, which appear very close to the experimentally observed absorption thresholds in Figure 2b. The

• electronic properties of CNTs are known to vary depending upon the chirality (wrapping angle) and diameter of the graphene sheet, generally exhibiting either semiconducting, or metallic behavior [46][47][48], the latter being observed in part of single-walled and in all multiwalled CNTs. In metallic CNTs

Role of solvents in the electronic transport properties of single-molecule junctions

• Katharina Luka-Guth,
• Sebastian Hambsch,
• Andreas Bloch,
• Philipp Ehrenreich,
• Bernd Michael Briechle,
• Filip Kilibarda,
• Torsten Sendler,
• Dmytro Sysoiev,
• Thomas Huhn,
• Artur Erbe and
• Elke Scheer

Beilstein J. Nanotechnol. 2016, 7, 1055–1067, doi:10.3762/bjnano.7.99

• solvent properties and the electronic properties of single molecules. Because of the large variation of possible conductance values and I–V shapes of single-molecule junctions, we restrict ourselves to the typical conductance range of hydrocarbon-based single-molecule junctions, i.e., 10−5G0 to 10−3G0

Advanced atomic force microscopy techniques III

• Thilo Glatzel and
• Thomas Schimmel

Beilstein J. Nanotechnol. 2016, 7, 1052–1054, doi:10.3762/bjnano.7.98

• . Combined AFM and STM measurements reveal related force and electronic properties [9], energy dissipation in manipulation processes can be examined via the excitation voltage needed to keep a constant amplitude of the probe oscillation [10][11], pulling forces of atomic or molecular wires can be determined

Optical absorption signature of a self-assembled dye monolayer on graphene

• Tessnim Sghaier,
• Sylvain Le Liepvre,
• Céline Fiorini,
• Ludovic Douillard and
• Fabrice Charra

Beilstein J. Nanotechnol. 2016, 7, 862–868, doi:10.3762/bjnano.7.78

• -packed PTCDA molecules deposited on epitaxial graphene have also been observed [21]. In turn, self-assembly of adsorbed conjugated molecules can influence the electronic properties of its substrate. Such a non-covalent functionalization is especially suitable in the case of graphene because of its

High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads

• Benjamin Grévin,
• Pierre-Olivier Schwartz,
• Laure Biniek,
• Martin Brinkmann,
• Nicolas Leclerc,
• Elena Zaborova and
• Stéphane Méry

Beilstein J. Nanotechnol. 2016, 7, 799–808, doi:10.3762/bjnano.7.71

• . To establish the resolution limits of SPV imaging by KPFM, there is now a crucial need to investigate model D–A interfaces with better defined structural and electronic properties. In that context, several groups have used the “microphase separation ability” of D–A block copolymers [12] or oligomers

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

• intrinsic electronic properties of a broad range of semiconducting molecules. However, the typically rather small size of polymer single crystals represents a drawback of the method described above. This small size complicates the application of electrical contacts to the device. In order to overcome this

• can be covalently attached to the CPE45 crystal surface. Thus, the mono-lamellar crystalline CPE45 surfaces reported here represent a versatile platform for the investigation of the electronic properties of a broad range of semiconducting molecules. While surfaces of polymer crystals have been

Thermo-voltage measurements of atomic contacts at low temperature

• Ayelet Ofarim,
• Bastian Kopp,
• Thomas Möller,
• León Martin,
• Johannes Boneberg,
• Paul Leiderer and
• Elke Scheer

Beilstein J. Nanotechnol. 2016, 7, 767–775, doi:10.3762/bjnano.7.68

• forming the atomic contact is smaller than 1 pm, thereby limiting possible changes of the conductance to less than 10−2G0 [24][25]. In addition, the irradiation with laser light may cause excitations in the Au layer that influence the electronic properties [23][24]. To avoid such unwanted other sources of

Orientation of FePt nanoparticles on top of a-SiO₂/Si(001), MgO(001) and sapphire(0001): effect of thermal treatments and influence of substrate and particle size

• Martin Schilling,
• Paul Ziemann,
• Zaoli Zhang,
• Johannes Biskupek,
• Ute Kaiser and
• Ulf Wiedwald

Beilstein J. Nanotechnol. 2016, 7, 591–604, doi:10.3762/bjnano.7.52

• material results from its thermal stability, its corrosion resistance and the possibility to tune its electronic properties [6][7]. Both of the appealing properties, the catalytic as well as the magnetic, hinge on the chemically ordered L10 phase of FePt close to equiatomic composition [6][8]. Though this

First-principles study of the structure of water layers on flat and stepped Pb electrodes

• Xiaohang Lin,
• Ferdinand Evers and
• Axel Groß

Beilstein J. Nanotechnol. 2016, 7, 533–543, doi:10.3762/bjnano.7.47

• have addressed the geometric structures and electronic properties of water layers on flat and stepped Pb surfaces. In contrast to late d-band metals, on Pb(111) the energy minimum structure does not correspond to an ice-like hexagonal arrangement at a coverage of 2/3, but rather to a distorted

• , but rather becomes disordered [30][40]. In the present work, we have addressed structural and electronic properties of water layers on flat and stepped Pb surfaces using periodic density functional theory (DFT) calculations. We will show the consequences of the large lattice constant of Pb on the

Bacteriorhodopsin–ZnO hybrid as a potential sensing element for low-temperature detection of ethanol vapour

• Saurav Kumar,
• Sudeshna Bagchi,
• Senthil Prasad,
• Anupma Sharma,
• Ritesh Kumar,
• Rishemjit Kaur,
• Jagvir Singh and
• Amol P. Bhondekar

Beilstein J. Nanotechnol. 2016, 7, 501–510, doi:10.3762/bjnano.7.44

• heterojunctions at the ZnO/bR nanostructure, and the possibility of exchanging charge carriers at the hybrid interface, are expected to strongly affect the electronic properties of the resulting nano-hybrid material. The hybrid ZnO-TF/bR and ZnO-NR/bR structures form the main percolative network through which

Charge and heat transport in soft nanosystems in the presence of time-dependent perturbations

• Alberto Nocera,
• Carmine Antonio Perroni,
• Vincenzo Marigliano Ramaglia and
• Vittorio Cataudella

Beilstein J. Nanotechnol. 2016, 7, 439–464, doi:10.3762/bjnano.7.39

• the dot–oscillator coupling sets the characteristic polaron energy and length scales Equation 9 reduces in this case to a single Langevin equation [76][86]. Since the main objective of this section is to discuss the range of validity of the adiabatic approach for the electronic properties, we hereby

• of validity of the adiabatic approach. In particular, we will focus on electronic properties as electrical and thermal conductivities resulting from the average over the dynamical fluctuations of the oscillator motion. To this aim, we report the zero-th order adiabatic expression for the electronic