Synthesis of [{AgO₂CCH₂OMe(PPh₃)}_n] and theoretical study of its use in focused electron beam induced deposition

• Jelena Tamuliene,
• Julian Noll,
• Peter Frenzel,
• Tobias Rüffer,
• Alexander Jakob,
• Bernhard Walfort and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 2615–2624, doi:10.3762/bjnano.8.262

• ]. This study was performed with 3-21G for Ag and 6-31++G** for the other atoms to satisfy both accuracy of the investigations and appropriate computing time and resources. The structure parameters of [AgO2CCH2OMe(PPh3)] and fragments thereof have been optimized with no symmetry constraint. The vibration

Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions

• Youngsang Kim,
• Safa G. Bahoosh,
• Dmytro Sysoiev,
• Thomas Huhn,
• Fabian Pauly and
• Elke Scheer

Beilstein J. Nanotechnol. 2017, 8, 2606–2614, doi:10.3762/bjnano.8.261

• closed forms of the photochromic molecule. For both isomeric molecular states, the features observed in the IET spectra are assigned with the help of computations that take the electron-vibration (EV) coupling into account. Results and Discussion The C5F-ThM photochromic molecule, used in this work, is

Numerical investigation of the tribological performance of micro-dimple textured surfaces under hydrodynamic lubrication

• Kangmei Li,
• Dalei Jing,
• Jun Hu,
• Xiaohong Ding and
• Zhenqiang Yao

Beilstein J. Nanotechnol. 2017, 8, 2324–2338, doi:10.3762/bjnano.8.232

• Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China 10.3762/bjnano.8.232 Abstract Surface texturing is an important approach for

Adsorbate-driven cooling of carbene-based molecular junctions

• Giuseppe Foti and
• Héctor Vázquez

Beilstein J. Nanotechnol. 2017, 8, 2060–2068, doi:10.3762/bjnano.8.206

• –vibration couplings and the left and right spectral densities: In our analysis the damping term Jλ in Equation 1 is introduced as an external parameter. We assume a constant damping of vibrational modes into bulk phonons of Jλ/2 = JL = JR = 5 × 1010 Hz. In the following we thus omit the label λ in the

• includes all contributions. We checked that setting the elements of the electron–vibration coupling matrix Mλ to zero would yield the same result. This is expected since the energy-dependent rates are obtained from the trace of the matrix products (Equation 4) where only diagonal terms contribute. Notice

Preparation and characterization of polycarbonate/multiwalled carbon nanotube nanocomposites

• Claudio Larosa,
• Niranjan Patra,
• Marco Salerno,
• Lara Mikac,
• Remo Merijs Meri and
• Mile Ivanda

Beilstein J. Nanotechnol. 2017, 8, 2026–2031, doi:10.3762/bjnano.8.203

• from the phenyl group (benzene ring) occurs at ≈1600 cm−1 and the C=C bond vibration at 1504 cm−1. The stretching of the ester group (O–C–O) occurs from 1165 to 1232 cm−1 [21]. Comparing the spectral band of bare PC with the 1, 2, and 3% MWCNT-loaded nanocomposites reveals that the carbonyl band (C=O

• ) in the spectrum of the former is shifted from 1788 to 1768 cm−1. The C=C band at 1518 cm−1 is shifted to 1504 cm−1 and the bands at 1233 and 1200 cm−1 in the region of the asymmetric O–C–O stretching vibration are transferred to a band at 1218 cm−1 with a shoulder at 1258 cm−1. The changes in the

Synthesis and functionalization of NaGdF₄:Yb,Er@NaGdF₄ core–shell nanoparticles for possible application as multimodal contrast agents

• Dovile Baziulyte-Paulaviciene,
• Vitalijus Karabanovas,
• Marius Stasys,
• Greta Jarockyte,
• Vilius Poderys,
• Simas Sakirzanovas and
• Ricardas Rotomskis

Beilstein J. Nanotechnol. 2017, 8, 1815–1824, doi:10.3762/bjnano.8.183

• peaks of oleate ligands. The absorption peak at 1710 cm−1 (Figure 3f) corresponds to the stretching vibration of C=O in pure oleic acid (Figure 3a) which is replaced by two carboxylate stretching bands (1560 and 1447 cm−1 in Figure 3e), which indicates oleate ligand adsorption on the UCNP surface. Tween

Methionine-mediated synthesis of magnetic nanoparticles and functionalization with gold quantum dots for theranostic applications

• Arūnas Jagminas,
• Agnė Mikalauskaitė,
• Vitalijus Karabanovas and
• Jūrate Vaičiūnienė

Beilstein J. Nanotechnol. 2017, 8, 1734–1741, doi:10.3762/bjnano.8.174

• νas(COO) and symmetric νs(COO) stretching vibrations of the COO− group, whereas the bands in the spectral region of 1277–1341 cm−1 are due to the coupled vibration of CH2 antisymmetric deformation and CH deformation modes [35][36]. According to the literature data [27], the band at 1516 cm−1 is

• associated with the symmetric deformation vibration of NH3+, δs(NH3). Besides, the typical methionine S–C stretching mode at 685 cm−1 [37][38] and a clear resolved C–S–C stretching mode, ν(CSC), peaked at 554 cm−1 [39] are present in the spectrum. In the FTIR spectra of methionine and methionine sulfoxide a

• NPs can also be proven by the presence of the vibration modes in the frequency range of 2961–2855 cm−1, attributable to the symmetric stretching of NH3+ ions [42]. The frequency of νs(COO) downshifts from 1414 to 1387 cm−1 upon stabilization of ferrite NPs with methionine molecules. The band near 1515

Fluorination of vertically aligned carbon nanotubes: from CF₄ plasma chemistry to surface functionalization

• Claudia Struzzi,
• Mattia Scardamaglia,
• Jean-François Colomer,
• Alberto Verdini,
• Luca Floreano,
• Rony Snyders and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2017, 8, 1723–1733, doi:10.3762/bjnano.8.173

• in the CF4 plasma discharge or they are formed due to ionization inside the mass spectrometer; the full range FTIR spectra are shown in Figure S2 in Supporting Information File 1. The characteristic region of the C–F bond stretching vibration in FTIR spectra ranges from 1218 to 1310 cm−1 (Figure 2b

• modes in the 1278–1287 cm−1 region reduces further loosing nearly 50% of the initial absorbance intensity when an applied power of 250 W is used. The two frames in Figure 2b detail the peaks located at 1261 and at 1286 cm−1. The peak at 1261 cm−1 is associated to the vibration mode of CF3 radical [11

• decreases due to conversion process taking place with other species in the discharge. On the other hand, the absorbance intensity trend of the CF2 vibration doesn’t show correspondence with its relative signal acquired with the mass spectrum: reactions involving this fragment may occur at higher powers just

Effect of the fluorination technique on the surface-fluorination patterning of double-walled carbon nanotubes

• Lyubov G. Bulusheva,
• Yuliya V. Fedoseeva,
• Emmanuel Flahaut,
• Jérémy Rio,
• Christopher P. Ewels,
• Victor O. Koroteev,
• Gregory Van Lier,
• Denis V. Vyalikh and
• Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 1688–1698, doi:10.3762/bjnano.8.169

• SWCNTs with vibration frequencies at 1220, 1100, and 1050 cm−1 [41]. The weakening of a covalent bond in this series was explained by a hyperconjugation with the π-electron system. Asanov et al. selected four bands for the fluorinated graphite spectrum, which were assigned to vibrations of a CF group

• surrounded by three CF neighbors (1230 cm−1), two CF neighbors and one bare carbon atom (1132 cm−1), one CF neighbor and two bare carbon atoms (1095 cm−1), and three bare carbon atoms (1045 cm−1) [42]. Evidently, the vibration of a certain bond may change its frequency depending of the curvature and type of

High-speed dynamic-mode atomic force microscopy imaging of polymers: an adaptive multiloop-mode approach

• Juan Ren and
• Qingze Zou

Beilstein J. Nanotechnol. 2017, 8, 1563–1570, doi:10.3762/bjnano.8.158

• imaging because an increase of the speed can cause a loss of the tip–sample interaction and/or the annihilation of the cantilever tapping vibration, particularly when the imaging size is large. Existing efforts on high-speed TM imaging [6][7][8][9] only led to a speed increase up to three times at the

• . Experimental Adaptive multiloop-mode imaging The AMLM aims to achieve high-speed dynamic-mode imaging by precisely tracking the sample topography, while minimizing the mean tip–sample interaction force per vibration period, . The key to the optimization of the mean tip–sample interaction force is to accurately

• track the sample topography by the AFM z-axis piezo. AMLM imaging introduces a feedback control of inner–outer loop structure to regulate the mean cantilever deflection per vibration period (called the TM-deflection). Thus the averaged (vertical) position of the cantilever in each tapping period is kept

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

•  1, Figure S4. The increasing relative intensity of the C=O stretching vibration of [FeLeq] clearly indicates the formation of the coordination polymer in the matrix. Elemental analysis also confirms the increasing concentration of the coordination polymer in the BCP micelle with an increasing

Oxidative chemical vapor deposition of polyaniline thin films

• Yuriy Y. Smolin,
• Masoud Soroush and
• Kenneth K. S. Lau

Beilstein J. Nanotechnol. 2017, 8, 1266–1276, doi:10.3762/bjnano.8.128

• peak at 1382 cm−1, assigned to CN stretching vibration in the quinoid region, is smaller, which further confirms that the LT-BC film contains a smaller amount of quinoid groups. Previous work on oCVD PEDOT showed similar trends with a lower stage temperature yielding lower conjugation length and dopant

Metal oxide nanostructures: preparation, characterization and functional applications as chemical sensors

• Dario Zappa,
• Angela Bertuna,
• Elisabetta Comini,
• Navpreet Kaur,
• Nicola Poli,
• Veronica Sberveglieri and
• Giorgio Sberveglieri

Beilstein J. Nanotechnol. 2017, 8, 1205–1217, doi:10.3762/bjnano.8.122

• are detected in the Raman spectrum in Figure 3. The peaks located at 489, 624 and 764 cm−1 are related to Eg, A1g and B2g vibration modes, respectively. These peaks are the common Raman peaks of tetragonal rutile bulk SnO2, as reported in literature [6]. The ZnO Raman spectrum is reported in Figure 4

• . Typical modes for ZnO crystals are a longitudinal optical (LO) mode, measured at 584 cm−1, and the transverse A1 mode, measured at 380 cm−1. Moreover, there are one E2 vibration at 433 cm−1 and one transverse (TO) mode E1 at about 400 cm−1, which is contributing to the tail of the E2 peak. The signal at

• 331 cm−1 is a second-order vibration. Thermal oxidation technique: WO3 Thermal oxidation of metallic tungsten films resulted in a disordered mats of tungsten oxide nanowires, covering all the patterned area of the substrates. Figure 5 reports a SEM picture of the nanowires, at 50k magnification

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

• difference is nicely reflected in the intensities and shapes of the νas(C–H) and νs(C–H) absorptions. Among 2/2a–d only for 2a and 2c all three possible absorptions could be observed, while further members exhibit only one νs(C–H) and the νas(C–H) vibration (Supporting Information File 1). For 3/3a–d the νas

• (C–H) vibration is always the most intensive one at 2970 ± 1 cm−1, followed by a less intensive first νs(C–H) absorption (2932 ± 1 cm−1) and a third even less intensive νs(C–H) band (2874 ± 4 cm−1). Due to these different spectral features it is possible to differentiate between a type 2/2a–d or 3/3a

• weak. Likely, this is due to the substitution of the aromatic C6H4 rings, decreasing the intensities of these vibrations [26]. The presence of CH3 groups in a compound is indicated in the IR spectra in general by one δas(C–H) (ca. 1465 cm−1) vibration and at least one δs(C–H) (ca. 1380 cm−1) vibration

Hierarchically structured nanoporous carbon tubes for high pressure carbon dioxide adsorption

• Julia Patzsch,
• Deepu J. Babu and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 1135–1144, doi:10.3762/bjnano.8.115

• the silica@carbon composite (3) compared to the SiC tubes (5) obtained after thermal treatment and purification shows a distinct change (Figure 8a). The Si–O vibration for 3 at ν = 1060 cm−1 disappears and the Si–C valence vibration of 5 at ν = 782 cm−1 appears. Figure 8b shows the EDX spectra of 5

Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization

• Mohamed Hamed Misbah,
• Mercedes Santos,
• Luis Quintanilla,
• Christina Günter,
• Matilde Alonso,
• Andreas Taubert and
• José Carlos Rodríguez-Cabello

Beilstein J. Nanotechnol. 2017, 8, 772–783, doi:10.3762/bjnano.8.80

• attributed to CH3 asymmetric bending, CH2 scissoring, and COO− symmetric stretching vibrations. The band at around 1018 cm−1 is assigned to nonstoichiometric apatites containing HPO42− ions, whereas the shoulder at around 1084 cm−1 is assigned to the ν3(PO4)3− vibration in stoichiometric HA [51][52][53]. The

First examples of organosilica-based ionogels: synthesis and electrochemical behavior

• Andreas Taubert,
• Ruben Löbbicke,
• Barbara Kirchner and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2017, 8, 736–751, doi:10.3762/bjnano.8.77

• vibrations and Si–OH silanol groups on the silica surface. Broad bands between 3000 and 3400 cm−1 originate from Si–OH, H2O, C–N, and N–H stretching vibrations. A further characteristic N–H stretching vibration is observed at 2055 cm−1 [48]. Figure 6 shows a representative small angle X-ray scattering (SAXS

• neat IL [BmimSO3H][PTS], the bands can be assigned to the C–N and C–H stretching vibration modes of the imidazolium ring (3151, 3112, 2957, and 2922 cm−1), CH3–N and CH2–N stretching modes and C–C stretching vibrations of the imidazolium ring (1602, 1573, 1456, and 1229 cm−1), and out of plane C–H

Optimizing qPlus sensor assemblies for simultaneous scanning tunneling and noncontact atomic force microscopy operation based on finite element method analysis

• Omur E. Dagdeviren and
• Udo D. Schwarz

Beilstein J. Nanotechnol. 2017, 8, 657–666, doi:10.3762/bjnano.8.70

• while NC-AFM uses the perturbation that surface forces impose on the vibration of a cantilever to sense the proximity of the surface from a tip located at the end of the cantilever [12][13][14]. It is even possible to conduct simultaneous STM and NC-AFM experiments, which deliver complementary

α-((4-Cyanobenzoyl)oxy)-ω-methyl poly(ethylene glycol): a new stabilizer for silver nanoparticles

• Jana Lutze,
• Miguel A. Bañares,
• Marcos Pita,
• Andrea Haase,
• Andreas Luch and
• Andreas Taubert

Beilstein J. Nanotechnol. 2017, 8, 627–635, doi:10.3762/bjnano.8.67

• to a scissoring NO2 vibration, likely from nitrate anions adsorbed on the SNP surface [47]. It must be noted here that at an excitation wavelength of 514.5 nm, the surface enhancement effect is less pronounced than at other wavelengths, but nevertheless is an established approach [48][49][50][51][52

Nanostructured carbon materials decorated with organophosphorus moieties: synthesis and application

• Giacomo Biagiotti,
• Vittoria Langè,
• Cristina Ligi,
• Stefano Caporali,
• Maurizio Muniz-Miranda,
• Anna Flis,
• K. Michał Pietrusiewicz,
• Giacomo Ghini,
• Alberto Brandi and
• Stefano Cicchi

Beilstein J. Nanotechnol. 2017, 8, 485–493, doi:10.3762/bjnano.8.52

• reaction is almost complete. The FTIR spectroscopy confirmed the reduction of the phosphine oxide group with the disappearance of the band at 1114 cm−1 related to the P=O stretching vibration (Supporting Information File 1, Figures S2–S4). The most functionalized material, compound 8, was finally tested as

Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption

• Jesús C. Echeverría,
• Ignacio Calleja,
• Paula Moriones and
• Julián J. Garrido

Beilstein J. Nanotechnol. 2017, 8, 475–484, doi:10.3762/bjnano.8.51

• groups into the xerogels can be monitored by the peaks located between 3100 and 3000 cm−1, which are assigned to C–H vibrations of the aromatic ring. The peaks at ≈3055 cm−1 and 3076 cm−1 are attributed to the C–H vibrations of the phenyl groups. The peak at ≈1431 cm−1 is attributed to the C=C vibration

• of the aromatic ring [20], and the peaks at 739 and 698 cm−1 are distinctive of benzene [21]. The three xerogels have the most intense bands at approximately 1090 cm−1 and 1132 cm−1. These arise from the asymmetric vibration of the siloxane bonds constituting the skeletal SiO2 network [22][23] and

Performance of natural-dye-sensitized solar cells by ZnO nanorod and nanowall enhanced photoelectrodes

• Saif Saadaoui,
• Mohamed Aziz Ben Youssef,
• Moufida Ben Karoui,
• Rached Gharbi,
• Emanuele Smecca,
• Vincenzina Strano,
• Salvo Mirabella,
• Alessandra Alberti and
• Rosaria A. Puglisi

Beilstein J. Nanotechnol. 2017, 8, 287–295, doi:10.3762/bjnano.8.31

• , 1421 cm−1 and 1458 cm−1, and also a stretching absorption band at 3368 cm−1 corresponding to the vibration of the associated O–H bond. The UV–vis measurements of the extracted dyes of henna and mallow powders diluted in ethanol are given in Figure 5. Both of the studied dyes show two remarkable peaks

Photocatalysis applications of some hybrid polymeric composites incorporating TiO₂ nanoparticles and their combinations with SiO₂/Fe₂O₃

• Andreea Laura Chibac,
• Tinca Buruiana,
• Violeta Melinte and
• Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

• stretching vibration of Si–O–Si bonds at about 1079 cm−1, suggesting the formation of silica layers. The OH groups (Si–OH and Ti–OH) led to a broad absorption band at 3400 cm−1, while the absorption band located at 959 cm−1 is due to the vibration of Ti–O–Si bonds [50][51]. The FTIR spectrum for TiO2/Fe2O3

Studying friction while playing the violin: exploring the stick–slip phenomenon

• Santiago Casado

Beilstein J. Nanotechnol. 2017, 8, 159–166, doi:10.3762/bjnano.8.16

• recovered and the bow forced movement feeds the string vibration. The process is repeated as long as the bow velocity is maintained. Corrections to the model focus on the string perturbation corner shape [13], because it affects the timing of the different Helmhotz model phases, modifying the tune. The

• player; but if it exceeds a certain value, the vibration is stopped while sliding and raucous or aperiodic motions appear, corresponding to scratchy sounds. Acceptable sounds arise only at a certain range of static and dynamic friction forces [11]. Furthermore, if the performing skill is appropriate and

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

• characteristic for Fe–O bond vibrations, the band at 555 cm−1, which may be attributed to the Cr–O lattice vibration [28]. The presence of metals in the samples was confirmed by SEM-EDX spectroscopy. In the spectra of the samples NPT2 and NPT4, the iron was detected, while in NPT3 (Supporting Information File 1

• ). The vibration bands characteristic for Fe–O bonds were identified in the 620–450 cm−1 range, while the bands in the region 3435–3119 cm−1 and 1400 cm−1 are attributed to the –OH bond vibration [32]. The presence of iron in the samples NPM0–NPM2 was confirmed by EDX analysis (Supporting Information