Adsorption and electronic properties of pentacene on thin dielectric decoupling layers

• Sebastian Koslowski,
• Daniel Rosenblatt,
• Alexander Kabakchiev,
• Klaus Kuhnke,
• Klaus Kern and
• Uta Schlickum

Beilstein J. Nanotechnol. 2017, 8, 1388–1395, doi:10.3762/bjnano.8.140

• metal [7]. For example, it has been shown that NaCl with a thickness of merely one to three atomic layers grown on a Cu(111) surface provides sufficient electronic decoupling between pentacene molecules and the metal surface [6]. The influence of the inert NaCl layer on the molecules is very small, as

• of the molecular position d and the dielectric constant of a single sheet of h-BN. Similar STS measurements of pentacene were carried out on KCl/Au(111), KCl/Cu(111) and KCl/(Cu110). The resulting STS data are depicted in Figure 7. The HOMO–LUMO gap can be used as a measure of the efficiency of an

• were generated by thermal evaporation of KCl at 653 K for 20 min. During this process, the substrates were kept at room temperature. The metal substrates (Au(111), Cu(111), Cu(110)) were cleaned by alternating sequences of Ar-ion bombardment and annealing at 843 K. The annealing temperature was reduced

Atomic structure of Mg-based metallic glass investigated with neutron diffraction, reverse Monte Carlo modeling and electron microscopy

• Rafał Babilas,
• Dariusz Łukowiec and
• Laszlo Temleitner

Beilstein J. Nanotechnol. 2017, 8, 1174–1182, doi:10.3762/bjnano.8.119

• Center (BNC) in Hungary. The wavelength of the incident radiation was λ = 0.111 nm. The diffractometer is equipped with a monochromater changer that uses Ge(111), Cu(111) or Cu(220), allowing the beam to be adjusted for the required Q-range and resolution. The scattering intensity was measured up to the

Role of oxygen in wetting of copper nanoparticles on silicon surfaces at elevated temperature

• Tapas Ghosh and
• Biswarup Satpati

Beilstein J. Nanotechnol. 2017, 8, 425–433, doi:10.3762/bjnano.8.45

• monoclinic (a = 4.682, b = 3.424, c = 5.127) CuO structure. The presence of Cu2O is also observed but there is no presence of Cu, indicating a complete oxidation. The XRD pattern of the as-deposited Cu nanoparticles on the Si (Figure 3a) shows the peaks at 43.5° and 50.7° which correspond to the Cu(111) and

Case studies on the formation of chalcogenide self-assembled monolayers on surfaces and dissociative processes

• Yongfeng Tong,
• Tingming Jiang,
• Azzedine Bendounan,
• Makri Nimbegondi Kotresh Harish,
• Angelo Giglia,
• Stefan Kubsky,
• Fausto Sirotti,
• Luca Pasquali,
• Srinivasan Sampath and
• Vladimir A. Esaulov

Beilstein J. Nanotechnol. 2016, 7, 263–277, doi:10.3762/bjnano.7.24

• used. Selenophene adsorption was performed from pure selenophene for 1 h. The Au samples were prepared by evaporation onto hot mica that had been degassed for three hours at 300 °C. Au deposition was done at this temperature and then a brief heating to 550 °C was performed. The Cu(111), Pd(111) and Ni

• described below. Studies of alkane and phenyl thiols do exist and they conclude that an ordered thiol layer is formed [76][77][78]. BDMT evaporative adsorption was studied on Au(111), Cu(100) and Cu(111) surfaces by Alarcón et al. [25][79] using time-of-flight ion scattering [80], which allows the study of

• observed. This could be due to an alternative adsorption site or to atomic S from dissociation. To clarify this, one needs information on the CLBEs for atomic S adsorption on Cu. Atomic S adsorption on Cu(100) and Cu(111) surfaces [81][82][83][84][85][86][87] leads to rather complex surface structures

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

• , Germany 10.3762/bjnano.6.248 Abstract We deposited a volatile lanthanide complex, tris(2,2,6,6-tetramethyl-3,5-heptanedionato)terbium(III), onto metal surfaces of Cu(111), Ag(111) and Au(111) in vacuum and observed well-ordered sub-monolayer films with low temperature (5 K) scanning tunneling microscopy

• of their derivatives exhibit SMM behavior [15]. It thus might be interesting to investigate Ln(thd)3 with low-temperature STM. In this work, we chose Tb(thd)3 (Tb = terbium) and deposited molecules on Au(111), Ag(111) and Cu(111) surfaces to explore the transferability of lanthanide molecules onto

• metal surfaces without decomposition. Results and Discussion Figure 2a–f shows STM topographies of Tb(thd)3 deposited on Cu(111), Ag(111) and Au(111), respectively. The imaging parameters are given in the caption. The white arrows indicate the direction, which was determined from images with atomic

Core-level spectra and molecular deformation in adsorption: V-shaped pentacene on Al(001)

• Anu Baby,
• He Lin,
• Gian Paolo Brivio,
• Luca Floreano and
• Guido Fratesi

Beilstein J. Nanotechnol. 2015, 6, 2242–2251, doi:10.3762/bjnano.6.230

• along the long edge was determined for Co islands on Cu(111) [19]. The peculiar V-shaped bending attained in our work [15] is a very interesting feature, which was never reported before and whose influence on the electronic and spectroscopic properties of the interface is investigated in this paper. We

Enhanced fullerene–Au(111) coupling in (2√3 × 2√3)R30° superstructures with intermolecular interactions

• Michael Paßens,
• Rainer Waser and
• Silvia Karthäuser

Beilstein J. Nanotechnol. 2015, 6, 1421–1431, doi:10.3762/bjnano.6.147

• surfaces, such as Ag(111) [17][18], Cu(111) [19][20] and Pt(111) [21][22][23], and therefore seems to be the rule rather than the exception. Moreover, it could be shown by STM investigations that the self-assembly of C60 on Au(111) surfaces causes the partial or complete lifting of the herringbone

• suggestion is supported by the superstructures of dim C60 molecules observed on Pt(111) and Cu(111) surfaces after an annealing step at 1100 K [22] and 560 K [34], respectively. Moreover, a successive change from bright to dim C60-molecules on the Cu(111)-surface was monitored during annealing cycles and

Structure and mechanism of the formation of core–shell nanoparticles obtained through a one-step gas-phase synthesis by electron beam evaporation

• Andrey V. Nomoev,
• Sergey P. Bardakhanov,
• Makoto Schreiber,
• Dashima G. Bazarova,
• Nikolai A. Romanov,
• Boris B. Baldanov,
• Bair R. Radnaev and
• Viacheslav V. Syzrantsev

Beilstein J. Nanotechnol. 2015, 6, 874–880, doi:10.3762/bjnano.6.89

• than the core structure and some crystal planes are clearly visible in the core structure. SAED measurements were performed on various areas of the core structure and throughout the core, Cu(111) was measured. The core structure was also measured after 5 years of storing the particles at atmospheric

• patterns can occur due to two identical planes being rotated with respect to one another, two parallel planes with dissimilar spacings, or a combination of the two. SAED measurements on these regions showed the presence of Cu(111), Cu2O(111), and a moiré spacing of 1.3100 nm. The moiré spacing, D, between

• are caused by parallel planes, this suggests that Cu2O(111) grew epitaxially onto the exposed Cu(111). Although it can not be determined definitively from the 2-dimentional TEM images, it may be possible that the Cu2O grew in holes in the shell. It is unknown when the Cu2O formed – during or after the

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

• Toma Susi,
• Thomas Pichler and
• Paola Ayala

Beilstein J. Nanotechnol. 2015, 6, 177–192, doi:10.3762/bjnano.6.17

• . Values of 284.15 [76][78] and 284.2 eV [69][70] have been measured on Ir(111) and Au-intercalated Ni(111) surfaces, respectively. C 1s values for graphene on other metal surfaces range from as low as 283.97 eV on Pt(111) [76][77], to 284.5 eV on Cu(111) [72], and 284.7 eV on Ni(111) [68]. The range of

Sublattice asymmetry of impurity doping in graphene: A review

• James A. Lawlor and
• Mauro S. Ferreira

Beilstein J. Nanotechnol. 2014, 5, 1210–1217, doi:10.3762/bjnano.5.133

• band gap would be obtainable using this method [36], and along with the findings of Zhao et al. this sparked further interest into this phenomenon. It should be noted that the experimental conditions were a high vacuum CVD process on a Cu(111) substrate with a temperature of 1000 °C, using CH4 and NH3

• sublattices. The reason for this is thought to be due to a strong interaction between the Cu(111) substrate and the boron impurity, in contrast to a very weak interaction with the substrate for nitrogen impurities [40]. The most recent and thorough study of asymmetric nitrogen dopants in graphene is by Zabet

• domains of different sublattice preference where the sharp borders are thought to arise from terracing of the substrate disrupting the asymmetry effect. The method was tailored to use a very smooth Cu(111) substrate and so they were able to achieve domain sizes far larger than previous efforts. Typical

Volcano plots in hydrogen electrocatalysis – uses and abuses

• Paola Quaino,
• Fernanda Juarez,
• Elizabeth Santos and
• Wolfgang Schmickler

Beilstein J. Nanotechnol. 2014, 5, 846–854, doi:10.3762/bjnano.5.96

• , while the coupling becomes weaker. Thus, the overall rates of the coinage metals are not governed by Sabatier’s principle alone, and form a plateau rather than a volcano. However, the difference in the rate constants for Cu(100) and Cu(111) in acid solutions, and also for Ag(100) and Ag(111), can be

• H1s orbital and the d bands of Pt(111), Ni(111), Cu(111). Densities of states of the d bands of Ni(111) and of the 1s spin orbitals of a hydrogen atom at a distance of 1.6 Å from the surface. Free energy surface for the Volmer reaction on Ni(111) in acid solution at the equilibrium potential for

CoPc and CoPcF₁₆ on gold: Site-specific charge-transfer processes

• Fotini Petraki,
• Heiko Peisert,
• Johannes Uihlein,
• Umut Aygül and
• Thomas Chassé

Beilstein J. Nanotechnol. 2014, 5, 524–531, doi:10.3762/bjnano.5.61

• or (ii) a superposition of chemical shifts and polarization screening at the interface. A different polarization screening may arise from a bending of the molecule at the interface accompanied with different distances for each atom from the substrate surface as suggested for CuPcF16 on Cu(111) and Ag

Plasma-assisted synthesis and high-resolution characterization of anisotropic elemental and bimetallic core–shell magnetic nanoparticles

• M. Hennes,
• A. Lotnyk and
• S. G. Mayr

Beilstein J. Nanotechnol. 2014, 5, 466–475, doi:10.3762/bjnano.5.54

• investigated with HRTEM are found consistent with Cu and Ni fcc phases with a slight systematic shift towards higher values, when compared to bulk plane separations (inset lower left for Cu(111) and Ni(111)). Quantitative EDX mapping revealing the underlying CS-structure: a) HAADF-STEM micrograph, b) Cu (blue

Change of the work function of platinum electrodes induced by halide adsorption

• Florian Gossenberger,
• Tanglaw Roman,
• Katrin Forster-Tonigold and
• Axel Groß

Beilstein J. Nanotechnol. 2014, 5, 152–161, doi:10.3762/bjnano.5.15

• adsorption of iodine and chlorine on Cu(111) [9] by using periodic density functional theory (DFT) calculations. Whereas chlorine causes the expected increase of the work function upon adsorption of an electronegative adsorbate, iodine leads to a surprising decrease of the work function for coverages up to

• , bromine and iodine on Pt(111) in order to check whether the findings for halogen adsorption on Cu(111) are also valid for the technologically important electrode material platinum. It has already been observed experimentally [18][19][20] as well as theoretically [11][13][17] that the adsorption of

• been missing. We will show that the observed decrease of the work function upon the adsorption of chlorine, bromine and iodine on Pt(111) at low coverages can be explained by the strong polarization of the adsorbed halogen atoms, as in the case of I/Cu(111) [9]. We contrast these results with findings

Influence of the adsorption geometry of PTCDA on Ag(111) on the tip–molecule forces in non-contact atomic force microscopy

• Gernot Langewisch,
• Jens Falter,
• André Schirmeisen and
• Harald Fuchs

Beilstein J. Nanotechnol. 2014, 5, 98–104, doi:10.3762/bjnano.5.9

• the five carbon rings in the perylene core can be identified. As already described by Moll et al. for PTCDA on Cu(111) [16], the contrast in AFM images recorded at tip–sample distances that correspond to the regime of repulsive forces reflects the electron density distribution of the molecules. This

• in Figure 2, in which the five carbon rings of the perylene core are visible, is provided by Gross and Moll et al. [8][16]. As was found for the first time for pentacene molecules and later also for PTCDA adsorbed on Cu(111), the atomic contrast revealing the carbon rings of organic molecules can be

Spring constant of a tuning-fork sensor for dynamic force microscopy

• Dennis van Vörden,
• Manfred Lange,
• Merlin Schmuck,
• Nico Schmidt and
• Rolf Möller

Beilstein J. Nanotechnol. 2012, 3, 809–816, doi:10.3762/bjnano.3.90

• frequency-shift signal. Prior to the measurements, the sensitivity of the TF in millivolts per nanometer (mV/nm) was calibrated, including the electronics for detection. This is done in several steps. First, the z-piezo of the scanning unit is calibrated by measuring the topography of a surface (Cu(111), Ag

Probing three-dimensional surface force fields with atomic resolution: Measurement strategies, limitations, and artifact reduction

• Mehmet Z. Baykara,
• Omur E. Dagdeviren,
• Todd C. Schwendemann,
• Harry Mönig,
• Eric I. Altman and
• Udo D. Schwarz

Beilstein J. Nanotechnol. 2012, 3, 637–650, doi:10.3762/bjnano.3.73

• sample surface. Force fields have now been recorded on NiO(001) [10][12][13], MgO/Ag(001) [14], NaCl(001) [15][16], Si(111)-(7×7) [17][18][19], HOPG [20][21], KBr(001) [9][22][23], Cu(111) [24], and CaCO3() [25] surfaces, as well as single molecules of PTCDA [26][27], pentacene [28], CO [29], C60 [30

Strong spin-filtering and spin-valve effects in a molecular V–C₆₀–V contact

• Mohammad Koleini and
• Mads Brandbyge

Beilstein J. Nanotechnol. 2012, 3, 589–596, doi:10.3762/bjnano.3.69

• and magnetic adatom on a Cu(111) surface using first-principles calculations. For the case of a vanadium tip/adatom, we demonstrate how spin coupling between the magnetic V atoms, mediated by the C60, can be observed in the electronic transport, which display a strong spin-filtering effect, allowing

Graphite, graphene on SiC, and graphene nanoribbons: Calculated images with a numerical FM-AFM

• Fabien Castanié,
• Laurent Nony,
• Sébastien Gauthier and
• Xavier Bouju

Beilstein J. Nanotechnol. 2012, 3, 301–311, doi:10.3762/bjnano.3.34

• various molecular systems [3][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59]. Recently, impressive results were shown with single pentacene C22H14 and C16H10N2O2 molecules adsorbed on a thin NaCl film deposited on a Cu(111) surface [52][53]. These breakthroughs were possible with a

An NC-AFM and KPFM study of the adsorption of a triphenylene derivative on KBr(001)

• Antoine Hinaut,
• Adeline Pujol,
• Florian Chaumeton,
• David Martrou,
• André Gourdon and
• Sébastien Gauthier

Beilstein J. Nanotechnol. 2012, 3, 221–229, doi:10.3762/bjnano.3.25

• room for progress as shown by the impressive submolecular resolution that has been demonstrated in recent works on the adsorption of pentacene [14] or decastarphene [15] molecules on Cu(111) and on a NaCl(001) bilayer on Cu(111). During the same period, Kelvin probe force microscopy (KPFM) has been

Molecular-resolution imaging of pentacene on KCl(001)

• Julia L. Neff,
• Jan Götzen,
• Enhui Li,
• Michael Marz and
• Regina Hoffmann-Vogel

Beilstein J. Nanotechnol. 2012, 3, 186–191, doi:10.3762/bjnano.3.20

• -lying molecules. These order in a commensurable superstructure with respect to the surface pattern. The growth of multilayers depends on the structural details of the substrate. A recent SFM study has shown the morphology of thin pentacene films on Cu(111) with molecular resolution [25]. On graphite

• shows a different tilting angle. On alkali halides, diffraction measurements and ambient SFM measurements of thick pentacene films show similar phases [30][31][32][33][34]. Single flat-lying molecules on ultrathin NaCl films on Cu(111) have been examined by SFM with unprecedented resolution with the aid

Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles

• Srinivasa Saranu,
• Sören Selve,
• Ute Kaiser,
• Luyang Han,
• Ulf Wiedwald,
• Paul Ziemann and
• Ulrich Herr

Beilstein J. Nanotechnol. 2011, 2, 268–275, doi:10.3762/bjnano.2.31

• Cu were determined by X-ray diffraction. The volume expansion of the Ta foils led to a shift of the Ta Bragg reflections to lower diffraction angles, while at the same time the Poisson contraction of the Cu film in the direction perpendicular to the film plane resulted in a shift of the Cu(111) fcc

• peak to higher angles. Both effects can be observed in Figure 4, in which X-ray diffraction patterns of the samples in the as-prepared state and after 24 h exposure to hydrogen gas are shown. The presence of a strong Cu(111) reflection indicates textured growth of the Cu layer with the close packed

• the foil. The Cu film has to follow this expansion, which reflects itself in a contraction perpendicular to the film surface [21]. The observed shift of the Cu(111) peak from 2Θ = 43.383° to 43.421° corresponds to a contraction of εz = −0.083%. Applying Hooke's law for elastically isotropic media

The role of the cantilever in Kelvin probe force microscopy measurements

• George Elias,
• Thilo Glatzel,
• Ernst Meyer,
• Alex Schwarzman,
• Amir Boag and
• Yossi Rosenwaks

Beilstein J. Nanotechnol. 2011, 2, 252–260, doi:10.3762/bjnano.2.29

• measured contact potential difference even under ultra-high vacuum conditions, and we demonstrate a good agreement between our model and KPFM measurements in ultra-high vacuum of NaCl monolayers grown on Cu(111). The effect of the oscillating cantilever shape on the KPFM resolution and sensitivity has been

• entire cantilever contributes only 8.4%. Comparison with experimental results The above analysis was applied to high resolution UHV KPFM measurements of NaCl thin films grown on Cu(111) [19]. The simulation was performed by convolving the two-dimensional PSF with the theoretical surface potential

• measurements of NaCl thin films grown on Cu(111) [19] with a cantilever first resonance amplitude of 20 nm and with a minimum distance of 1 nm. The dashed line represents the line section of the simulations. Line section of UHV KPFM (i) measurements [20], (ii) simulated, and (iii) theoretical potential

Manipulation of gold colloidal nanoparticles with atomic force microscopy in dynamic mode: influence of particle–substrate chemistry and morphology, and of operating conditions

• Samer Darwich,
• Karine Mougin,
• Akshata Rao,
• Enrico Gnecco,
• Shrisudersan Jayaraman and
• Hamidou Haidara

Beilstein J. Nanotechnol. 2011, 2, 85–98, doi:10.3762/bjnano.2.10

• , the first accurate manipulation studies of nanoparticles were performed by STM. In a pioneer experiment, Cuberes et al. moved single C60 molecules along the steps of a Cu(111) surface using an STM in UHV [7]. In addition, the majority of the STM experiments were performed at cryogenic temperatures [8

Structure, morphology, and magnetic properties of Fe nanoparticles deposited onto single-crystalline surfaces

• Armin Kleibert,
• Wolfgang Rosellen,
• Mathias Getzlaff and
• Joachim Bansmann

Beilstein J. Nanotechnol. 2011, 2, 47–56, doi:10.3762/bjnano.2.6

• particles [66]. Alternatively, a substrate-induced fcc/bcc competition in the nanoparticles could lead to reduced spin moments in Figure 2e as, e.g., observed for Fe nanostructures grown on fcc Cu(111) in [67]. Conclusion We have presented a combined XMCD, RHEED, and STM study on the magnetic, structural