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

• −17 °C and by layering EtOH onto a CHCl3 solution of 1, 4 and 5 at room temperature, respectively. Results of elemental analyses and isolated yields are given in Table 1. Physical measurements and instrumentation IR transmission measurements of pressed KBr pellets were recorded at room temperature

Surfactant-controlled composition and crystal structure of manganese(II) sulfide nanocrystals prepared by solvothermal synthesis

• Elena Capetti,
• Anna M. Ferretti,
• Vladimiro Dal Santo and
• Alessandro Ponti

Beilstein J. Nanotechnol. 2015, 6, 2319–2329, doi:10.3762/bjnano.6.238

• precipitate immediately formed, which was collected by filtration using a Buchner funnel previously cooled to −20 °C and washed with cold methanol (3 times, 10 mL). Drying under vacuum (p ≈ 10−2 torr) for 6 h gave MnSt2 as a white powder. The average yield was ≈50%. IR (KBr), ν (cm−1): 2955, 2917, 2849, 1552

• carbon-coated TEM grid. ATR-FTIR spectra (4 cm−1 resolution, 50 scans) were collected using an ATR platform (Golden Gate, Specac) mounted in a spectrophotometer (FTS-40, Biorad) equipped with a KBr beam splitter and a MCT detector operating between 400 and 4000 cm−1. For ATR-FTIR spectroscopy, the

Green synthesis, characterization and catalytic activity of natural bentonite-supported copper nanoparticles for the solvent-free synthesis of 1-substituted 1H-1,2,3,4-tetrazoles and reduction of 4-nitrophenol

• Akbar Rostami-Vartooni,
• Mohammad Alizadeh and
• Mojtaba Bagherzadeh

Beilstein J. Nanotechnol. 2015, 6, 2300–2309, doi:10.3762/bjnano.6.236

• reagents All reagents were purchased from the Merck and Sigma-Aldrich and used without further purification. The bentonite and Thymus vulgaris plant used in this paper were collected from the Vartoon region (Isfahan, Iran). The IR spectra were recorded on a JASCO, FT/IR-6300 instrument in KBr pellets. The

Electrospray deposition of organic molecules on bulk insulator surfaces

• Antoine Hinaut,
• Rémy Pawlak,
• Ernst Meyer and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2015, 6, 1927–1934, doi:10.3762/bjnano.6.195

• , ESI has been successfully applied to deposit triply fused porphyrin molecules on an insulating KBr(001) surface in UHV environment. Different deposition coverages have been obtained and characterization of the surface by in-situ atomic force microscopy working in the non-contact mode shows details of

• molecules which are more suitable for future devices and could incorporate additional functions and anchoring groups. In this work we present the adaptation of a UHV-ESI system to deposit triply fused porphyrin molecules on a bulk insulator KBr(001) sample and the analysis of theses deposits by high

• performed a deposition of the solvent solution only, i.e., toluene/isopropanol in the ratio 2:1 on a clean KBr(001) surface. Figure 2a shows a topography image acquired by nc-AFM at room temperature on a KBr(001) surface after a total time of 30 min of UHV-ESI deposition of the pure solvent. This is a long

Lower nanometer-scale size limit for the deformation of a metallic glass by shear transformations revealed by quantitative AFM indentation

• Arnaud Caron and
• Roland Bennewitz

Beilstein J. Nanotechnol. 2015, 6, 1721–1732, doi:10.3762/bjnano.6.176

• by means of atomic force microscopes (AFM indentation) has been used to observe the nucleation and gliding of single dislocations in a KBr(100) single crystal [7] and in Cu(100) [8]. Pop-ins were observed in load–displacement curves, and the pop-in length observed in AFM-indentation was in the range

• much larger distance than for the metallic glass. In our study the AFM indentation of Pt(111) is similar to KBr(100) or Cu(100) where plastic flow has been found to extend over several 100 nm from the AFM indentation site [7][8]. In contrast, the plastic flow of Pt57.5Cu14.7Ni5.3P22.5 metallic glass is

• previous AFM indentation results on crystalline KBr(100) [7] and Cu(100) [8]. The increased pop-in length at higher loads is also in good agreement with nanoindentation results on (111)-oriented fcc-metal surfaces such as Au(111), for which burst-like dislocations activation has been observed [3]. However

Radiation losses in the microwave K_u band in magneto-electric nanocomposites

• Talwinder Kaur,
• Sachin Kumar,
• Jyoti Sharma and
• A. K. Srivastava

Beilstein J. Nanotechnol. 2015, 6, 1700–1707, doi:10.3762/bjnano.6.173

• size 0.02°). Attached functional groups have been analysed with Fourier transform infrared spectrometry (FTIR interferometer IR prestige-21 FTIR (model-8400S)) in the range of 400–4000 cm−1 by making calcined product pallets with KBr in a weight ratio of 1:10. ESR measurements were performed at room

Synthesis, characterization and in vitro biocompatibility study of Au/TMC/Fe₃O₄ nanocomposites as a promising, nontoxic system for biomedical applications

• Hanieh Shirazi,
• Maryam Daneshpour,
• Soheila Kashanian and
• Kobra Omidfar

Beilstein J. Nanotechnol. 2015, 6, 1677–1689, doi:10.3762/bjnano.6.170

• nanoparticles. To understand the effect of coating on the magnetization behavior of Fe3O4, the magnetic nanoparticles were subjected to VSM (MAG-3110, Freescale) analysis. By means of FTIR (Thermo Nicolet Nexus 870 FTIR, USA) and using KBr pellets, the assembly of the Au nanoparticles on magnetic nanoparticles

The convenient preparation of stable aryl-coated zerovalent iron nanoparticles

• Olga A. Guselnikova,
• Andrey I. Galanov,
• Anton K. Gutakovskii and
• Pavel S. Postnikov

Beilstein J. Nanotechnol. 2015, 6, 1192–1198, doi:10.3762/bjnano.6.121

• [29]. IR analysis of the powder in KBr pellets indicates the presence of the 4-nitrophenyl functional group on the NP surface. Figure 1 compares the IR spectrum of nitrobenzene and 4-nitrophenyl-coated ZVI NPs. The NP spectrum exhibits strong adsorption bands corresponding to the benzene ring skeletal

• radiation (1.5405 Å). The FTIR spectra were measured using the KBr pellet technique with a Nicolet 5700 spectrometer ranging from 400 to 4000 cm−1. Differential thermal and thermogravimetric analysis was carried out on a SDT Q60 thermal analyzer in the temperature range 20–600 °C with a heating rate of 10

• washed with diethyl ether, filtered under reduced pressure and dried under vacuum. Caution! Diazonium salts in the dry state are potentially explosive. Therefore, they must be carefully stored and handled. Mp 132 °C; IR (KBr): 2308 (N≡N); 1H NMR (300 MHz, DMSO); δ 2.28 (s, 3H), 7.10 (d, J = 7.5 Hz, 2H

Synthesis, characterization, monolayer assembly and 2D lanthanide coordination of a linear terphenyl-di(propiolonitrile) linker on Ag(111)

• Zhi Chen,
• Svetlana Klyatskaya,
• José I. Urgel,
• David Écija,
• Olaf Fuhr,
• Willi Auwärter,
• Johannes V. Barth and
• Mario Ruben

Beilstein J. Nanotechnol. 2015, 6, 327–335, doi:10.3762/bjnano.6.31

• work station for MALDI–ToF. MALDI spectra were measured with no additional matrix compound other than the sample itself. Elemental analysis of carbon, hydrogen, and nitrogen were carried out in a Vario Micro Cube. Infrared spectra were measured in KBr pellets (MAGNA FTIR 750, Nicolet) in the 4000–400

• /ppm 4.34 (d, J = 5.96 Hz, 4H, –CH2–), 5.37 (t, J = 5.96, 5.96 Hz, 2H, –OH), 7.54 (d, J = 8.37 Hz, 4H, Ar–H), 7.77 (d, J = 8.39 Hz, 4H, Ar–H), 7.82 (s, 4H, Ar–H); 13C NMR (126 MHz, DMSO-d6) δ/ppm 139.21, 138.43, 131.88, 127.20, 126.74, 121.62, 90.79, 83.39, 49.48; IR (KBr, cm−1): 2184 (C≡C); MALDI–ToF

• , 82.86, 63.95; IR (KBr, cm−1): 2260 (C≡N), 2141, (C≡C); MALDI–ToF (m/z): [M]+ calcd for C24H12N2, 328.1; found, 328.1; Anal. calcd for C24H12N2: C, 87.79; H, 3.68; N, 8.53; found: C, 87.63; H, 3.45; N 8.81. Additionally, 10 mg of a white solid was separated. The analytical data were identical to

Release behaviour and toxicity evaluation of levodopa from carboxylated single-walled carbon nanotubes

• Julia M. Tan,
• Jhi Biau Foo,
• Sharida Fakurazi and
• Mohd Zobir Hussein

Beilstein J. Nanotechnol. 2015, 6, 243–253, doi:10.3762/bjnano.6.23

• , Waltham, MA) using a KBr disc. For carbon, hydrogen, nitrogen and sulfur (CHNS) analysis, a CHNS-932 from LECO Instrument (St Joseph, MI) was used. Raman spectra were collected using a UHTS 300 Raman spectrometer (WITec, Germany) with an excitation wavelength at 532 nm. CNT samples were deposited on glass

Size-dependent density of zirconia nanoparticles

• Agnieszka Opalinska,
• Iwona Malka,
• Wojciech Dzwolak,
• Tadeusz Chudoba,
• Adam Presz and
• Witold Lojkowski

Beilstein J. Nanotechnol. 2015, 6, 27–35, doi:10.3762/bjnano.6.4

• from 25 to 1100 °C for 30 min. Two selected powders, one dried at 25 °C and one annealed at 800 °C, were rinsed for 60 min in H2O in order to remove –OD groups, as explained below. To assess the type and amount of surface layers in the nanoparticles, KBr-based pellets containing 1 wt % ZrO2 were

Dissipation signals due to lateral tip oscillations in FM-AFM

• Michael Klocke and
• Dietrich E. Wolf

Beilstein J. Nanotechnol. 2014, 5, 2048–2057, doi:10.3762/bjnano.5.213

• [38] with parameters from [39] and van der Waals parameters from [40] for the ionic bonding of KBr. The tip is a cube of 3 × 3 × 3 unit cells (216 atoms) of a NaCl-lattice, while there are 7 × 7 × 3 unit cells (1176 atoms) for the substrate. Compared to the crystallographic orientation of the

• possible, we performed a Monte-Carlo parameter study again, but now with the potential for KBr. We place the tip such that we expect a maximum in the dissipation signal. We vary the parameter set according to Table 1. Figure 8 shows that the dissipation rate increases dramatically by a factor of 108, when

• normal cycles with the default parameter set. Topography and dissipation for KBr. Scan line along [010]. We observe a doubling in the dissipation signal. Topography and dissipation for Monte-Carlo parameter-space study. Parameter set for simulations with KBr potential, and ranges for MC parameter

Growth evolution and phase transition from chalcocite to digenite in nanocrystalline copper sulfide: Morphological, optical and electrical properties

• Priscilla Vasthi Quintana-Ramirez,
• Ma. Concepción Arenas-Arrocena,
• José Santos-Cruz,
• Marina Vega-González,
• Omar Martínez-Alvarez,
• Víctor Manuel Castaño-Meneses,
• Laura Susana Acosta-Torres and
• Javier de la Fuente-Hernández

Beilstein J. Nanotechnol. 2014, 5, 1542–1552, doi:10.3762/bjnano.5.166

• spectroscopy (EDS) was carried out in a JSM-6060LV SEM at 20 keV by using KBr pellets containing granules of CuxS powder to make the punctual analysis. X-ray patterns of copper sulfide synthesized in organic solution at a) 230 and 220 °C, the chalcocite phase is obtained and at b) 240 and 260 °C, the

Organic and inorganic–organic thin film structures by molecular layer deposition: A review

• Pia Sundberg and
• Maarit Karppinen

Beilstein J. Nanotechnol. 2014, 5, 1104–1136, doi:10.3762/bjnano.5.123

• precursor exposure lengths, although some ammonium chloride salt formation was observed. The highest GPC values for nylon 66 were 13.1 Å per cycle when deposited at 60 °C on pretreated Si(100) [8] and up to 19 Å per cycle on KBr substrates at the deposition temperature of 83 °C [50]. The latter value is

Thermal stability and reduction of iron oxide nanowires at moderate temperatures

• Annalisa Paolone,
• Marco Angelucci,
• Stefania Panero,
• Maria Grazia Betti and
• Carlo Mariani

Beilstein J. Nanotechnol. 2014, 5, 323–328, doi:10.3762/bjnano.5.36

• each sample. The NW oxide powders were ground and mixed with dried KBr in a weight ratio of about 1:100. The mixed powders were pressed in a circular die in order to have self-standing pellets. The transmission of each sample was calculated as the ratio between the intensity transmitted by each pellet

En route to controlled catalytic CVD synthesis of densely packed and vertically aligned nitrogen-doped carbon nanotube arrays

• Slawomir Boncel,
• Sebastian W. Pattinson,
• Valérie Geiser,
• Milo S. P. Shaffer and
• Krzysztof K. K. Koziol

Beilstein J. Nanotechnol. 2014, 5, 219–233, doi:10.3762/bjnano.5.24

• = 514.5 nm) was used in all cases. FT-IR analyses were performed by using a Perkin Elmer spectrometer in the range from 0.44 eV (2778 nm, 3600 cm−1) to 0.1 eV (12500 nm, 800 cm−1) from KBr pellets. TGA analyses were carried out in air at a heating rate of 10 °C·min−1 by using a TGA Q500. XRD studies were

STM tip-assisted engineering of molecular nanostructures: PTCDA islands on Ge(001):H surfaces

• Amir A. Ahmad Zebari,
• Marek Kolmer and
• Jakub S. Prauzner-Bechcicki

Beilstein J. Nanotechnol. 2013, 4, 927–932, doi:10.3762/bjnano.4.104

• insulator (e.g., NaCl on metal surfaces [5][6][7][8][9][10][11][12][13] or KBr on InSb [14][15]) or even a single layer of an atomic or molecular species (e.g., passivation of Si or Ge surfaces [16][17][18][19]). Such an extremely thin interlayer not only electronically decouples on-top adsorbed molecular

Spin relaxation in antiferromagnetic Fe–Fe dimers slowed down by anisotropic Dy^III ions

• Valeriu Mereacre,
• Frederik Klöwer,
• Yanhua Lan,
• Rodolphe Clérac,
• Juliusz A. Wolny,
• Volker Schünemann,
• Christopher E. Anson and
• Annie K. Powell

Beilstein J. Nanotechnol. 2013, 4, 807–814, doi:10.3762/bjnano.4.92

• were carried out under ambient conditions. Elemental analyses for C, H, and N were performed by using an Elementar Vario EL analyzer. IR spectra were measured on a PerkinElmer Spectrum One spectrometer as KBr disks. Preparation of [Fe4Dy2(OH)2(nbdea)4(O2CCMe3)6(N3)2]∙3MeCN (1): A mixture of FeCl2

• C66H133Fe4Dy2N13O22 (1) (dried): C, 40.17; H, 6.59; N, 8.96; found: C, 40.98; H, 6.76; N, 6.73; IR (KBr) ν: 2948 (s); 2932 (s); 2877 (m); 2057 (s); 1603 (s); 1550 (s); 1476 (s); 1463 (w); 1407 (m); 1373 (m); 1352 (m); 1330 (w) 1284 (w); 1269 (w); 1222 (m); 1164 (w); 1142 (w); 1081 (m); 1054 (m); 1049 (m); 1019 (m

• nbdea. Yield 32.1% (based on Fe); Anal. calcd for C56H106Fe4N10O23Y2: C, 39.83; H, 6.32; N. 8.29; found: C, 39.93; H, 6.71; N, 8.12; IR (KBr) ν: 2961 (s); 2923 (s); 2872 (m); 2061 (s); 1601 (s); 1552 (s); 1481 (s); 1461 (w); 1407 (m); 1371 (m); 1354 (m); 1332 (w) 1286 (w); 1268 (w); 1226 (m); 1165 (w

Novel composite Zr/PBI-O-PhT membranes for HT-PEFC applications

• Mikhail S. Kondratenko,
• Igor I. Ponomarev,
• Marat O. Gallyamov,
• Dmitry Y. Razorenov,
• Yulia A. Volkova,
• Elena P. Kharitonova and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2013, 4, 481–492, doi:10.3762/bjnano.4.57

• ratio) and the reaction product, which occurred after heating this mixture up to 320–350 °C, were pressed into KBr pellets, and FT-IR spectra were taken by using a Nicolet Magna-IR-750 spectrometer. TMA Thermomechanical analysis of the composite membranes doped with PA was conducted by using a Netzsch

Nanoparticles of novel organotin(IV) complexes bearing phosphoric triamide ligands

• Zahra Shariatinia,
• Ebadullah Asadi,
• Vahid Tavasolinasab and
• Khodayar Gholivand

Beilstein J. Nanotechnol. 2013, 4, 94–102, doi:10.3762/bjnano.4.11

• ), 168.37 (s, C=O); FTIR (KBr): 3437 (NH), 3071 (CH), 2906 (CH), 2840 (CH), 1671 (C=O), 1595, 1441, 1210, 1137 (P=O), 972 (P-Namine), 742 (P-Namide), 708, 532 (Sn-C)s cm−1. Bis[N-benzoyl-bis(4-phenylpiperazin-1-yl)phosphinic amide-κO]diaqua dimethyltin(IV) (2) To a solution of N-benzoyl-bis(4

• ), 7.91 (d, 3J(H,H) = 7.5 Hz, 4H, Ar-H, N-benzoyl); 13C NMR (CD3OD): δ 45.80 (s, CH2), 51.97(s, CH2), 118.40 (s), 122.58 (s), 129.23 (s), 129.74 (s), 130.29 (s), 133.93 (s), 134.74 (d, 3J(P,C) = 8.9 Hz, ipso-C), 152.09 (s), 171.49 (s, C=O); FT-IR (KBr): 3424 (NH), 3062 (CH), 2833 (CH), 1675 (C=O), 1593

• Hz, ipso-C), 152.99 (s), 171.37 (s, C=O); FT-IR (KBr): 3431 (NH), 3064 (CH), 2852 (CH), 2820 (CH), 1667 (C=O), 1596, 1454, 1377, 1326, 1190 (P=O), 1132 (P-Namine), 965(P-Namide), 759, 688, 572 (Sn-C)as, 532 (Sn-C)s cm−1. Bis[tris(4-phenylpiperazin-1-yl)phosphinic amide-κO]dichlorido dimethyltin(IV

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

• surface and stays constant until the plane of closest approach is reached, which is a direct consequence of (c). Additionally, Kawai et al. [16] and Fremy et al. [23] performed drift/creep-corrected three-dimensional force-field-spectroscopy experiments using atom-tracking, on NaCl(001) and KBr(001

• to another with indistinguishable symmetries. However, as long as tip–sample interactions are predominantly electrostatic in nature (e.g., on ionic crystals such as NaCl and KBr, as well as most metal oxides), method A holds a notable advantage over the other methods, as it allows the correction of

FTIR nanobiosensors for Escherichia coli detection

• Stefania Mura,
• Gianfranco Greppi,
• Maria Laura Marongiu,
• Pier Paolo Roggero,
• Sandeep P. Ravindranath,
• Lisa J. Mauer,
• Nicoletta Schibeci,
• Francesco Perria,
• Massimo Piccinini,
• Plinio Innocenzi and
• Joseph Irudayaraj

Beilstein J. Nanotechnol. 2012, 3, 485–492, doi:10.3762/bjnano.3.55

• films were collected. Some tests with E. coli K12 were carried out to monitor the selectivity of the device. Film characterization Mesoporous titania thin films were characterized with a Nicolet Nexus FTIR spectrophotometer equipped with a KBr–DTGS detector and a KBr beam splitter. The measurements were

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

Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces

• Laurent Nony,
• Franck Bocquet,
• Franck Para,
• Frédéric Chérioux,
• Eric Duverger,
• Frank Palmino,
• Vincent Luzet and
• Christian Loppacher

Beilstein J. Nanotechnol. 2012, 3, 285–293, doi:10.3762/bjnano.3.32

• zwitterionic molecules on ionic-crystal (100) template surfaces. The crystals chosen (NaCl, KCl, RbCl, and KBr) all show the same structure (face-centered cubic, or rock salt) and thus provide an identical quadratic pattern of alternating electric charges on the surface, but with a different lattice constant

• the NaCl, RbCl, and KBr substrates, which present significantly different lattice constants compared to KCl (Table 1). As can be seen from the values of the measured MSPS lattice constant cmsps,exp in Table 1, for the substrates KCl, RbCl, and KBr, all measured cmsps,exp are within ±1% error of 5.15 Å

• substrate orient along the direction, we have to further evaluate the adsorption of MSPS on the substrates of KCl, RbCl, and KBr. If it is not the electrostatic MS interaction but a pure geometric effect that dominates the adsorption of MSPS on ionic substrates, one would expect that the orientation of the

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

• Antoine Hinaut Adeline Pujol Florian Chaumeton David Martrou Andre Gourdon Sebastien Gauthier CNRS, CEMES (Centre d'Elaboration des Matériaux et d'Etudes Structurales), BP 94347, 29 rue Jeanne Marvig, F-31055 Toulouse, France 10.3762/bjnano.3.25 Abstract The adsorption on KBr(001) of a specially

• temperature. Two types of monolayers are identified, one in which the molecules lie flat on the surface (MLh) and another in which they stand approximately upright (MLv). The Kelvin voltage on these two structures is negatively shifted relative to that of the clean KBr surface, revealing the presence of

• molecule is strongly adsorbed in the MLh structure with an adsorption energy of 1.8 eV. In the MLv layer, the molecules form π-stacked rows aligned along the polar directions of the KBr surface. In these rows, the molecules are less strongly bound to the substrate, but the structure is stabilized by the