The interplay between spin densities and magnetic superexchange interactions: case studies of mono- and trinuclear bis(oxamato)-type complexes

• Azar Aliabadi,
• Bernd Büchner,
• Vladislav Kataev and
• Tobias Rüffer

Beilstein J. Nanotechnol. 2017, 8, 2245–2256, doi:10.3762/bjnano.8.224

• ENDOR spectra of 8@7 at (ν = 9.56 GHz, T = 20 K) at six different orientations of the single crystal in the external magnetic field. The 0° orientation corresponds to the direction of B0 along the -axis of the g-tensor, and the 90° orientation represents the perpendicular direction. Reproduced with

In situ controlled rapid growth of novel high activity TiB₂/(TiB₂–TiN) hierarchical/heterostructured nanocomposites

• Jilin Wang,
• Hejie Liao,
• Yuchun Ji,
• Fei Long,
• Yunle Gu,
• Zhengguang Zou,
• Weimin Wang and
• Zhengyi Fu

Beilstein J. Nanotechnol. 2017, 8, 2116–2125, doi:10.3762/bjnano.8.211

• corresponding SAED pattern (Figure 2g) indicated that the sample was a TiB2 single crystal with high crystallinity. In general, the HRTEM and SAED analysis results of the hierarchical/heterostructured nanocomposites corresponded with those of the above-mentioned XRD, EDX and FSEM characterizations. Effects of

Transport characteristics of a silicene nanoribbon on Ag(110)

• Ryoichi Hiraoka,
• Chun-Liang Lin,
• Kotaro Nakamura,
• Ryo Nagao,
• Maki Kawai,
• Ryuichi Arafune and
• Noriaki Takagi

Beilstein J. Nanotechnol. 2017, 8, 1699–1704, doi:10.3762/bjnano.8.170

• temperature STM (P < 10−10 Torr, T = 6 K). A Ag(110) single crystal surface was cleaned by repeated Ar ion sputtering and annealing at around 800 K. The STM tip was made of an electrochemically etched W wire and postannealed in the UHV chamber. The SiNRs were synthesized on Ag(110) by depositing Si atoms from

Process-specific mechanisms of vertically oriented graphene growth in plasmas

• Subrata Ghosh,
• Shyamal R. Polaki,
• Niranjan Kumar,
• Sankarakumar Amirthapandian,
• Mohamed Kamruddin and
• Kostya (Ken) Ostrikov

Beilstein J. Nanotechnol. 2017, 8, 1658–1670, doi:10.3762/bjnano.8.166

• applications. Experimental Synthesis of VGNs ECR-PECVD was employed for the growth of VGNs on thermally oxidized SiO2/Si substrates. The SiO2 layer was grown on single-crystal Si substrates by thermal oxidation and the thickness of the oxide layer is maintained at around 400 nm by controlling oxidation time

Group-13 and group-15 doping of germanane

• Nicholas D. Cultrara,
• Maxx Q. Arguilla,
• Shishi Jiang,
• Chuanchuan Sun,
• Michael R. Scudder,
• R. Dominic Ross and
• Joshua E. Goldberger

Beilstein J. Nanotechnol. 2017, 8, 1642–1648, doi:10.3762/bjnano.8.164

• oxidation of As occurs. The As 2p3/2 peak centered at 1323 eV in as-grown As:GeH starts disappearing in favor of a 1326.1 eV [35] oxidized state. The effect of dopants on the electronic transport of single-crystal flakes of Ga:GeH and As:GeH were measured with contacts fabricated by using a shadow mask

Charge transfer from and to manganese phthalocyanine: bulk materials and interfaces

• Florian Rückerl,
• Daniel Waas,
• Bernd Büchner,
• Martin Knupfer,
• Dietrich R. T. Zahn,
• Francisc Haidu,
• Torsten Hahn and
• Jens Kortus

Beilstein J. Nanotechnol. 2017, 8, 1601–1615, doi:10.3762/bjnano.8.160

• ordered interfaces of this kind were realized by depositing one of the two phthalocyanines on a gold(100) single crystal, which resulted in well-oriented thin films [125][126][127]. Subsequently, the partner phthalocyanine was deposited on top, which finally gave rise to well-ordered heterojunctions as

• revealed by polarization dependent X-ray absorption spectroscopy (XAS) studies [127]. In Figure 12 we present corresponding N 1s absorption spectra for pure MnPc and two different film thicknesses of an F16CoPc overlayer, deposited on a gold single crystal. Different light polarizations with respect to the

Parylene C as a versatile dielectric material for organic field-effect transistors

• Tomasz Marszalek,
• Maciej Gazicki-Lipman and
• Jacek Ulanski

Beilstein J. Nanotechnol. 2017, 8, 1532–1545, doi:10.3762/bjnano.8.155

• -effect mobility, investigated in rubrene single-crystal transistors equipped with various dielectrics layers, is shown in Figure 7. In Figure 7a, for the device based on Parylene C, the suppression of contact effects requires a larger VDS value (and thus also a larger value of VGS), in order to remain in

• derivatives (parylenes). Because of its unique properties described above, the latter polymer has the potential to outgrow the remaining candidates in its application as a gate dielectric in both single-crystal organic transistors and polycrystalline TFTs. One of the most cited publications in the field of

• organic field effect transistors is the work of Podzorov et al. describing rubrene single-crystal transistors with Parylene C used as the gate insulating material [2]. This configuration allowed the authors to fabricate OFET devices with high charge-carrier mobility and reproducible characteristics

Formation of ferromagnetic molecular thin films from blends by annealing

• Peter Robaschik,
• Ye Ma,
• Salahud Din and
• Sandrine Heutz

Beilstein J. Nanotechnol. 2017, 8, 1469–1475, doi:10.3762/bjnano.8.146

• reached and is not saturated at the maximum field of 7 T. This is in line with earlier reports on β-MnPc powder and single-crystal samples [10][11][27][28]. However, to our knowledge no reports on the coercivity in β-MnPc thin films from OMBD have been made. The magnetic moment at 7 T amounts to 2.1 μB

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

• pressure of 3·10−10 mbar and investigated in a custom-built STM operating at a temperature of 5.3 K in UHV. A Rh(111) single crystal was cleaned by an initial Ar+ bombardment at 1103 K for 1 h and a subsequent series of repetitive Ar-ion bombardments (15–30 min) at room temperature, followed by annealing

Synthesis of [Fe(L_eq)(L_ax)]_n coordination polymer nanoparticles using blockcopolymer micelles

• Christoph Göbel,
• Ottokar Klimm,
• Florian Puchtler,
• Sabine Rosenfeldt,
• Stephan Förster and
• Birgit Weber

Beilstein J. Nanotechnol. 2017, 8, 1318–1327, doi:10.3762/bjnano.8.133

• . After cooling down overnight, the fine crystalline precipitate was filtered off and dried in vacuo to yield brown or dark violet powders. The crystals were too small for single-crystal X-ray structure analysis. In Figure 1, the magnetic properties of [FeLeq(bpea)]n (1) and [FeLeq(bpey)]n (3) as plot of

Synthesis, spectroscopic characterization and thermogravimetric analysis of two series of substituted (metallo)tetraphenylporphyrins

• Rasha K. Al-Shewiki,
• Carola Mende,
• Roy Buschbeck,
• Pablo F. Siles,
• Oliver G. Schmidt,
• Tobias Rüffer and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1191–1204, doi:10.3762/bjnano.8.121

• sterically more demanding substituents will vary film morphologies one can, for example, inspect the results of the single-crystal crystallographic characterization even of the compounds displayed in Figure 1. It is instructive to notice, that for ZnTPP(OMe)4 [13] the formation of 2D layers is observed in

Adsorption characteristics of Er₃N@C₈₀on W(110) and Au(111) studied via scanning tunneling microscopy and spectroscopy

• Sebastian Schimmel,
• Zhixiang Sun,
• Danny Baumann,
• Denis Krylov,
• Nataliya Samoylova,
• Alexey Popov,
• Bernd Büchner and
• Christian Hess

Beilstein J. Nanotechnol. 2017, 8, 1127–1134, doi:10.3762/bjnano.8.114

• ) single crystal substrates. Beside their potential application as electrode materials, the choice of these established standard substrate for STM/STS investigations provides the advantages of comparability to results of earlier measurements and well-known fast cleaning treatments. Experimental Er3N@C80

• evaporator for t ≈ 4 min at a temperature of about T ≈ 800 K on the single crystal substrates. By this procedure, samples with a coverage of about 16% could be prepared reproducibly. In order to induce the formation of monolayer height molecule islands on the surfaces, the substrates were heated (T = 620–670

The role of 2D/3D spin-polarization interactions in hybrid copper hydroxide acetate: new insights from first-principles molecular dynamics

• Ziyad Chaker,
• Guido Ori,
• Mauro Boero and
• Carlo Massobrio

Beilstein J. Nanotechnol. 2017, 8, 857–860, doi:10.3762/bjnano.8.86

• of the organic molecular component. Motivated by an updated set of the atomic coordinates for CuOHAc, recently proposed on the basis of a single-crystal X-ray experiment [10], we refine here the study of the effect of pressure on the structural and 2D/3D magnetic character of CuOHAc. With respect to

• °, and symmetry group P21 are those recently proposed by Svarcova and co-workers [10] based on a single-crystal X-ray diffraction study. The wave functions are expanded at the Γ point of the supercell in a plane-wave basis set with an energy cutoff of 90 Ry. Following our previous works [6][7], in order

Measuring adhesion on rough surfaces using atomic force microscopy with a liquid probe

• Juan V. Escobar,
• Cristina Garza and
• Rolando Castillo

Beilstein J. Nanotechnol. 2017, 8, 813–825, doi:10.3762/bjnano.8.84

• and Fadh = 24.0 ± 1.2 nN. The other is a boron-doped polished single-crystal natural-type diamond surface with Fadh = 40.7 ± 1.5 nN. Both, the larger Fadh and the smaller relative measurement error correlate with the smoother quality of the corresponding surfaces. Results and Discussion Here, we

• mercury and a boron-doped single crystal natural-type diamond with a polished surface, θc = 155° [10], we obtain w = 0.0454 J/m2. To exactly determine the area of the rough diamond surface that is wetted by mercury is a difficult task because the sub-micrometer protrusions are not uniform and they are

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

• -phenylenebis(NR-substituted oxamidato); pmdta = N,N,N’,N”,N”-pentamethyldiethylenetriamine). The identities of the heterotrinuclear complexes 1–3 were established by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction studies, which revealed the cationic complex fragments [Cu2Ni(opboR2

• as described next by crystallisation experiments performed under inert atmosphere. Single crystal X-ray diffraction studies Slow diffusion of Et2O vapour into CH2Cl2 solutions of 1 and 3 and into a MeCN solution of 2 afforded single crystals suitable for crystallographic studies of the compositions

• (e.g., [13][15][27]) were not successful. Conclusion The three heterotrinuclear bis(oxamidato) type complexes comprising [Cu2Ni(opboR2)]2+ fragments (R = Me (1), Et (2), n-Pr (3)) could be successfully synthesized and their identities have been unambiguously established by single-crystal X-ray

Investigation of the photocatalytic efficiency of tantalum alkoxy carboxylate-derived Ta₂O₅ nanoparticles in rhodamine B removal

• Subia Ambreen,
• Mohammad Danish,
• Narendra D. Pandey and
• Ashutosh Pandey

Beilstein J. Nanotechnol. 2017, 8, 604–613, doi:10.3762/bjnano.8.65

• alkoxides are also established by other researchers. Researchers have isolated and confirmed the dimeric nature of heteroleptic alkoxides by single-crystal X-ray diffraction. Ta2O5 nanoparticles were synthesized by the sol–gel method. Tantalum(V) alkoxides and the heteroleptic chlorocarboxylato derivatives

Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media

• Ruchi Deshmukh,
• Anurag Mehra and
• Rochish Thaokar

Beilstein J. Nanotechnol. 2017, 8, 494–505, doi:10.3762/bjnano.8.53

• -range ordered crystalline nanoplates observed after 120 min, (e) nanorods obtained after 45 min. Schematic showing the growth of nanoplates. (a) Simultaneous presence of twinned and single- crystal nanoparticles at “zero time”; (b) high-resolution image of twinned nanoparticles; (c) high-resolution

• image of single-crystal nanoparticles, both observed at “zero time”; (d) the illustration shows how different modes of aggregation of tiny particles form the upper and side planes of the nanoplates after 15 min; the size of the nanoparticles drops from 15–20 nm to 8 nm; (e,f) low- and high-resolution

The longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

• Florent Pessina and
• Denis Spitzer

Beilstein J. Nanotechnol. 2017, 8, 452–466, doi:10.3762/bjnano.8.49

• (SDBD) plate where a cold plasma disrupts the droplet by the Coulomb fission. Like the electrospray technique, each droplet should crystallize into a unique single crystal. The minimum mean diameter obtained was 500 nm, with a diameter distribution from 200 to 900 nm, and the particles had a prismatic

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

• the orange rectangular area in figure (b); (g) and (h) collected from the orange rectangular area in figure (d). SAED pattern of (a) as-deposited copper nanoparticles on the silicon substrate (b) the same sample annealed at 500 °C in oxygen ambient. The bright spot (indexed in red) are from single

• crystal silicon and the ring patterns (indexed in green) are from polycrystalline Cu, Cu2O or CuO. X-ray diffraction pattern for the (a) as-deposited copper nanoparticles on silicon substrate and (b) when the copper nanoparticle substrate is annealed under oxygen at 500 °C for 1 min. (a),(b) Cross

Multimodal cantilevers with novel piezoelectric layer topology for sensitivity enhancement

• Steven Ian Moore,
• Michael G. Ruppert and
• Yuen Kuan Yong

Beilstein J. Nanotechnol. 2017, 8, 358–371, doi:10.3762/bjnano.8.38

• designs are shown in Figure 2m–p. The cantilevers are fabricated using the PiezoMUMPs microfabrication process available from the company MEMSCAP Inc [54]. The device layer is a 10 μm thick layer of single-crystal-silicon deposited on a (100) oriented wafer. A 0.5 μm layer of AlN and a 1 μm layer of

Association of aescin with β- and γ-cyclodextrins studied by DFT calculations and spectroscopic methods

• Ana I. Ramos,
• Pedro D. Vaz,
• Susana S. Braga and
• Artur M. S. Silva

Beilstein J. Nanotechnol. 2017, 8, 348–357, doi:10.3762/bjnano.8.37

• -cyclodextrin·methanol·n·H2O (refcode NUNRIX [37]), in which the glucopyranose units already feature a high symmetry due to the presence of the methanol guest. The geometry of γ-CD after further optimisation is depicted in Figure 10. The initial geometry of aescin Ib was taken from its single-crystal diffraction data (refcode

Obtaining and doping of InAs-QD/GaAs(001) nanostructures by ion beam sputtering

• Sergei N. Chebotarev,
• Alexander S. Pashchenko,
• Leonid S. Lunin,
• Elena N. Zhivotova,
• Georgy A. Erimeev and
• Marina L. Lunina

Beilstein J. Nanotechnol. 2017, 8, 12–20, doi:10.3762/bjnano.8.2

• and Solar Energy, Southern Scientific Center of Russian Academy of Sciences, 344006, 41, Chekhov Avenue, Rostov-on-Don, Russia 10.3762/bjnano.8.2 Abstract The features of InAs quantum dots obtained on GaAs(001) single-crystal substrates by ion-beam sputtering were investigated. It has been shown that

• oxide films containing adsorbed impurities. The described way of cleaning the targets cannot be used for the pre-treatment of single-crystal substrates because of possible radiation damage. For this purpose, we used the procedure described in [28]. Pre-growth annealing of the prepared substrate in the

• fabricated at different ion current densities. The shift of the peaks is caused, first of all, by the reduction of elastic stress in the layers with QDs and, then, by an increase in the average QD size. The peaks drift to LO phonon scattering on unstrained single-crystal indium arsenide at 242 cm−2. Note

From iron coordination compounds to metal oxide nanoparticles

• Mihail Iacob,
• Carmen Racles,
• Codrin Tugui,
• George Stiubianu,
• Adrian Bele,
• Liviu Sacarescu,
• Daniel Timpu and
• Maria Cazacu

Beilstein J. Nanotechnol. 2016, 7, 2074–2087, doi:10.3762/bjnano.7.198

• [34] by using Fe(NO3)3∙9H2O and CH3COONa, glacial acetic acid and distilled water. The structure of the compound was confirmed by FTIR and single crystal XRD (lattice parameters). FTIR (KBr) ν: 420 (vw), 468 (vw), 527 (w), 613 (s), 662 (s), 822 (w), 835 (w), 898 (vw), 951 (w), 1035 (m), 1292 (s), 1385

• of the compound was confirmed by FTIR and single crystal XRD (lattice parameters). FTIR (KBr) ν: 3435 (s), 3154 (s), 1591 (vs), 1564 (s), 1510 (vs), 1437 (vs), 1385 (vs), 1369 (vs), 1219 (s), 1155 (s), 1080 (m), 1007 (m), 972 (s), 874 (s), 845 (w), 826 (w), 781 (s), 743 (m), 638 (s), 602 (s), 515 (s

• )3∙9H2O (0.5 g) in 5 mL methanol. The process took place at 60 °C for 5 h, with heating and cooling rates of 0.1 °C/min. Dark brown reddish single crystals were observed directly in the autoclave at the end of the process. The structure of the compound was confirmed by FTIR, EDX and single crystal

Ferromagnetic behaviour of ZnO: the role of grain boundaries

• Boris B. Straumal,
• Svetlana G. Protasova,
• Andrei A. Mazilkin,
• Eberhard Goering,
• Gisela Schütz,
• Petr B. Straumal and
• Brigitte Baretzky

Beilstein J. Nanotechnol. 2016, 7, 1936–1947, doi:10.3762/bjnano.7.185

• size of 31 nm and sGB = 5.32·107 m2/m3. These sGB values are, respectively, slightly below and above the threshold value sth = 5.3 × 107 m2/m3 for pure ZnO (Figure 1a and [7]). The magnetic measurements supported the choice of three specimens. Namely, the single crystal showed only a negligibly small

• curve, open squares). It corresponds to a total magnetic volume fraction of about 35%. The lowest relaxation is observed for the ZnO single crystal (upper curve, open circles).The non-magnetic single crystal has no significant magnetic volume fraction at all. In the middle lies the curve for coarse

• appear not at csb but later, at higher concentrations of B. This is well visible in Figure 7b where the dependence of ZnO lattice parameter is shown for different grain sizes and Mn contents [26][47]. The steepest curve is for the single crystal. The csb value for Mn in ZnO lattice is only about 7 atom

A new approach to grain boundary engineering for nanocrystalline materials

• Shigeaki Kobayashi,
• Sadahiro Tsurekawa and
• Tadao Watanabe

Beilstein J. Nanotechnol. 2016, 7, 1829–1849, doi:10.3762/bjnano.7.176

• probably deformed by shear stress as in the case of a single crystal, because the persistent slip bands (PSBs) can continuously transfer across the low-angle boundaries [97]. The fatigue cracks preferentially nucleated along random boundaries whose boundary plane may almost correspond to the direction of