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

• [16][17], MgO [18][19][20], NaCl [21][22][23][24][25], CaCO3 [26], TiO2 [27][28][29], NiO [30], KBr [21][31][32][33][34][35], CaF2 [36], and graphite [37][38][39][40][41][42][43][44] to mention just a few. Moreover, from monolayer to single molecules, submolecular resolution has been obtained on

A measurement of the hysteresis loop in force-spectroscopy curves using a tuning-fork atomic force microscope

• Manfred Lange,
• Dennis van Vörden and
• Rolf Möller

Beilstein J. Nanotechnol. 2012, 3, 207–212, doi:10.3762/bjnano.3.23

• MgO tip and a MgO surface by L. N. Kantorovich and T. Trevethan [6] showed that the width of such a hysteresis, which may be observed experimentally, depends on the temperature. Due to thermal excitation the width reduces to 1 Å at 100 K and to 0.1 Å at room temperature. The development of NC-AFM

Mesoporous MgTa₂O₆ thin films with enhanced photocatalytic activity: On the interplay between crystallinity and mesostructure

• Jin-Ming Wu,
• Igor Djerdj,
• Till von Graberg and
• Bernd M. Smarsly

Beilstein J. Nanotechnol. 2012, 3, 123–133, doi:10.3762/bjnano.3.13

• a wet-chemical approach [9]. Thin films containing mainly MgTa2O6 and Mg4Ta2O9 phases can be formed by reactions between MgO(001) substrates and Ta–O vapors, which are produced by electron-beam evaporation of a Ta2O5 powder target in a high-vacuum system, at temperatures of 700–1000 °C [5]. In 1998

Enhancement of the critical current density in FeO-coated MgB₂ thin films at high magnetic fields

• Andrei E. Surdu,
• Hussein H. Hamdeh,
• Imad A. Al-Omari,
• David J. Sellmyer,
• Alexei V. Socrovisciuc,
• Andrei A. Prepelita,
• Ezgi T. Koparan,
• Ekrem Yanmaz,
• Valery V. Ryazanov,
• Horst Hahn and
• Anatolie S. Sidorenko

Beilstein J. Nanotechnol. 2011, 2, 809–813, doi:10.3762/bjnano.2.89

• the effect of nanoparticles deposited onto the surface of MgB2 thin films on the transport properties of these films. In order to carry out the proposed research, MgB2 films with a thickness of about 600 nm were prepared on the MgO (100) substrates by using a “two-step” synthesis technology similar to

Femtosecond time-resolved photodissociation dynamics of methyl halide molecules on ultrathin gold films

• Mihai E. Vaida,
• Robert Tchitnga and
• Thorsten M. Bernhardt

Beilstein J. Nanotechnol. 2011, 2, 618–627, doi:10.3762/bjnano.2.65

• observed for CH3I [10][18] and CH3Br [12] on MgO, CH3Br on LiF [19], and CH3Cl on Pd(100) [20], as well as for CH3Cl, CH3Br and CH3I on GaAs(110) [21][22], and the coverage dependence is attributed to the adsorbate–adsorbate repulsion that results from the interaction between the static dipole moments of

Nanoscaled alloy formation from self-assembled elemental Co nanoparticles on top of Pt films

• Luyang Han,
• Ulf Wiedwald,
• Johannes Biskupek,
• Kai Fauth,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2011, 2, 473–485, doi:10.3762/bjnano.2.51

• Physik IV, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany 10.3762/bjnano.2.51 Abstract The thermally activated formation of nanoscale CoPt alloys was investigated, after deposition of self-assembled Co nanoparticles on textured Pt(111) and epitaxial Pt(100) films on MgO(100) and SrTiO3(100

• resulting local alloy. In this paper we report the experimental details and results for the specific case of Co NPs on top of Pt(111)/MgO(100) and Pt(100)/SrTiO3(100). (For the sake of clarity and brevity, SrTiO3(100) is renamed STO(100) in the following). Pt films on MgO(100) and STO(100) Due to the

• attractive catalytic properties of Pt on top of ceramic supports, much work has been dedicated to the identification of active sites on its surface. For this purpose the controlled growth of Pt films on various single crystalline metal oxides, such as MgO(100) or STO(100), is advantageous. On the resulting

Zirconium nanoparticles prepared by the reduction of zirconium oxide using the RAPET method

• Michal Eshed,
• Swati Pol,
• Aharon Gedanken and
• Mahalingam Balasubramanian

Beilstein J. Nanotechnol. 2011, 2, 198–203, doi:10.3762/bjnano.2.23

• reaction of commercial ZrO2 with Mg powder was carried out in a closed stainless steel cell, at 750 °C. On completion of the reaction, the additionally formed MgO is removed by treatment with acid. The characterization of the product was performed by XRD, X-ray absorption spectroscopy, SEM, TEM and

• elemental analysis. The XRD pattern reveals that the product is composed of pure metallic zirconium, without any traces of the MgO by-product. Keywords: Let-Lok®; nanoparticles; RAPET; reduction; zirconium; Introduction Zirconium is a strong transition metal that resembles titanium. Because of its strong

• observed in Figure 1b, or is buried in the background. We cannot rule out however, the existence of ZrxOy in the background. Even if such impurities exist their amount is less than 5%. The absence of MgO-peaks confirms that it is completely removed by the acid treatment. Although the XRD pattern of the

Structural and magnetic properties of ternary Fe_1–xMn_xPt nanoalloys from first principles

• Markus E. Gruner and
• Peter Entel

Beilstein J. Nanotechnol. 2011, 2, 162–172, doi:10.3762/bjnano.2.20

• ferro- and antiferromagnetic regions with canted moments. Later, Meyer and Thiele [74] investigated the same system as epitaxial films grown on MgO. Their XRD (X-ray diffraction) data essentially confirmed the structural properties reported in [73] despite possible mechanical strains due to the thin

Twofold role of calcined hydrotalcites in the degradation of methyl parathion pesticide

• Alvaro Sampieri,
• Geolar Fetter,
• María Elena Villafuerte-Castrejon,
• Adriana Tejeda-Cruz and
• Pedro Bosch

Beilstein J. Nanotechnol. 2011, 2, 99–103, doi:10.3762/bjnano.2.11

• patterns with marked differences (Supporting Information File 2 for XRD diffractograms). This process leads to the formation of mixed oxides whose crystallite size depends on their crystallization rate [9][10][11][12][27][28]. For instance, NiO and MgO oxides, from Mg–Al and Ni–Al calcined HTs, have a

• highly disperse periclase-like structure (MgO) and is usually formed between 450 and 500 °C. Aluminum is then incorporated into the periclase framework. However, in Zn–Al, the Zn species crystallize more rapidly and the only detected compound is ZnO as wurtzite, without any aluminum atoms into the

Defects in oxide surfaces studied by atomic force and scanning tunneling microscopy

• Thomas König,
• Georg H. Simon,
• Lars Heinke,
• Leonid Lichtenstein and
• Markus Heyde

Beilstein J. Nanotechnol. 2011, 2, 1–14, doi:10.3762/bjnano.2.1

• are supposed to be involved in electron transfer processes on the surface. The trapped electrons in the color centers can be transferred to adsorbates such as Au atoms. The defect-free MgO surface is quite inert while a defect rich surface shows a high and complex chemical reactivity [22]. In order to

• on the MgO surface are investigated in detail and classified by their charge state. From calculations it has been proposed that color centers are directly involved in chemical reactions [23][24], e.g., as adsorption sites due to more attractive defect-adsorbate interactions compared with the pristine

• MgO surface. It is also experimentally investigated whether color centers are attractive or repulsive in comparison to the surrounding MgO lattice. Sample system: magnesium oxide on Ag(001) An NC-AFM image of a perfect MgO surface is shown in Figure 5. The film is two atomic layers thick, however, films

Review and outlook: from single nanoparticles to self-assembled monolayers and granular GMR sensors

• Alexander Weddemann,
• Inga Ennen,
• Anna Regtmeier,
• Camelia Albon,
• Annalena Wolff,
• Katrin Eckstädt,
• Nadine Mill,
• Michael K.-H. Peter,
• Jochen Mattay,
• Carolin Plattner,
• Norbert Sewald and
• Andreas Hütten

Beilstein J. Nanotechnol. 2010, 1, 75–93, doi:10.3762/bjnano.1.10

• magnetically soft to be easily influenced by magnetic field variations to be detected, while the bottom (reference) layer is magnetically hard and, ideally, cannot be switched by external perturbations. The experimental setup employed here consists of two CoFeB layers that are separated by an MgO barrier. The

Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

• Ulf Wiedwald,
• Luyang Han,
• Johannes Biskupek,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5

• the focus of the present work, have been deposited onto various, mostly planar, substrates. Standard combinations are Co and Fe NPs on Si/SiO2 or Pt as well as FePt on MgO, Si and sapphire. The latter substrates were single crystalline materials with (001) and (0001) orientations, respectively, while

• , in case of Pt, (111)-textured thin films (50 nm) were used which were obtained by pulsed laser deposition (PLD) at ambient temperature on MgO(001) or (100)-oriented films (80 nm) epitaxially grown by PLD on (001) strontium titanate (SrTiO3) crystals at 400 °C. In all cases, no special pre-treatment

• is necessary and the substrates must be able to withstand this etching procedure. In this context, among dielectric materials especially, oxides such as MgO, sapphire, SrTiO3, quartz were found to be suitable, as well as materials forming thin oxide layers such as Si. Furthermore, adhesion of the NPs