Mobility of charge carriers in self-assembled monolayers

• Zhihua Fu,
• Tatjana Ladnorg,
• Hartmut Gliemann,
• Alexander Welle,
• Asif Bashir,
• Michael Rohwerder,
• Qiang Zhang,
• Björn Schüpbach,
• Andreas Terfort and
• Christof Wöll

Beilstein J. Nanotechnol. 2019, 10, 2449–2458, doi:10.3762/bjnano.10.235

• , Figure S1). Further characterization methods such as infrared reflection absorption spectroscopy (IRRAS) and attenuated transmission reflection (ATR) spectroscopy were also applied. The assignment of the molecular vibrations was aided by quantum-chemical calculations, from which the transition dipole

• moments (TDM) of the respective vibrations can be identified and used for an estimation of the orientation due to the surface selection rule in IRRAS. For comparison, the IRRA spectrum of the PAT-SAM, ATR spectrum and Gaussian IR spectrum for PAT were recorded and evaluated (Supporting Information File 1

• in these two spectra are in accordance with the assumption of monolayer formation [26]. Note that a striking difference between the bulk and the PAT-SAM spectra is that the vibrational peaks at 942 cm−1 and 889–893 cm−1 for CH/CC vibrations of anthracene present in ATR spectra become a broad peak at

pH-Controlled fluorescence switching in water-dispersed polymer brushes grafted to modified boron nitride nanotubes for cellular imaging

• Saban Kalay,
• Yurij Stetsyshyn,
• Volodymyr Donchak,
• Khrystyna Harhay,
• Ostap Lishchynskyi,
• Halyna Ohar,
• Yuriy Panchenko,
• Stanislav Voronov and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2019, 10, 2428–2439, doi:10.3762/bjnano.10.233

• stretching vibrations of C–H bonds. The absorption band at 1730 cm−1 is formed by carbonyl fragment in carboxyl and ester groups of the fluorescein and acrylic acid. A characteristic peak of benzene rings of fluorescein acrylate appears at around 1580 cm−1. In addition, the С–О–С bonds in esteric fragments

• are revealed by the stretching vibrations at 1120 and 1050 cm−1. All of this spectral information confirms the successful fabrication of grafted P(AA-co-FA) brushes on oligoperoxide-functionalized BNNTs. The optical properties of P(AA-co-FA)-functionalized BNNTs were studied by absorption and confocal

Atomic force acoustic microscopy reveals the influence of substrate stiffness and topography on cell behavior

• Yan Liu,
• Li Li,
• Xing Chen,
• Ying Wang,
• Meng-Nan Liu,
• Jin Yan,
• Liang Cao,
• Lu Wang and
• Zuo-Bin Wang

Beilstein J. Nanotechnol. 2019, 10, 2329–2337, doi:10.3762/bjnano.10.223

• probe tip scanned across the specimen surface, acoustic and morphological images were acquired simultaneously. The deflections of the cantilever represent the morphological information, and the vibrations of the cantilever correspond to the acoustic signals. By employing a suitable mechanical model to

• describe the vibrations of the cantilever, the contact stiffness of the tip–sample interaction can be estimated [27][28]. For one-phase homogeneous materials, the detected vibrations will remain relatively uniform, while for inhomogeneous materials, the vibrational amplitude depends on the elastic

• obtain quantitative information on undeveloped and developed SU-8 film surfaces. AFAM uses the near-field detection of acoustic signals to study surfaces and even buried structures [31][32]. For AFAM, a transducer generates ultrasound waves propagating into the sample to cause vibrations of the sample

Design and facile synthesis of defect-rich C-MoS₂/rGO nanosheets for enhanced lithium–sulfur battery performance

• Chengxiang Tian,
• Juwei Wu,
• Zheng Ma,
• Bo Li,
• Pengcheng Li,
• Xiaotao Zu and
• Xia Xiang

Beilstein J. Nanotechnol. 2019, 10, 2251–2260, doi:10.3762/bjnano.10.217

• all curves of MoS2, consistent with the in-plane and out-of-plane A1g vibrations of pristine MoS2, respectively [37]. In addition to these peaks from pristine MoS2, the Raman spectra of C-MoS2/rGO, C-MoS2/rGO-6, C-MoS2/rGO-4 and C-MoS2/rGO-8 exhibit two broad bands at 1363 cm−1 (D-band) and 1587 cm−1

• (G-band) resulting from in-plane vibrations and defect-induced vibrations of sp2-hybridized carbon atoms in amorphous carbon and rGO [30]. The surface elements of the composites are analyzed by XPS. The survey spectrum confirms that the expected elements in the composites are C, Mo, O, and S (Figure

Magnetic properties of biofunctionalized iron oxide nanoparticles as magnetic resonance imaging contrast agents

• Natalia E. Gervits,
• Andrey A. Gippius,
• Alexey V. Tkachev,
• Evgeniy I. Demikhov,
• Sergey S. Starchikov,
• Igor S. Lyubutin,
• Alexander L. Vasiliev,
• Vladimir P. Chekhonin,
• Maxim A. Abakumov,
• Alevtina S. Semkina and
• Alexander G. Mazhuga

Beilstein J. Nanotechnol. 2019, 10, 1964–1972, doi:10.3762/bjnano.10.193

• the region up to 950 cm−1 is shown. The peaks at 352, 510, 651, and 719 cm−1 correspond to the oxygen vibrations in maghemite γ-Fe2O3. The solid lines are the approximation of the experimental spectrum by Gaussian distribution. Room temperature Mössbauer spectra of HSA-coated magnetic nanoparticles

Long-term entrapment and temperature-controlled-release of SF₆ gas in metal–organic frameworks (MOFs)

• Hana Bunzen,
• Andreas Kalytta-Mewes,
• Leo van Wüllen and
• Dirk Volkmer

Beilstein J. Nanotechnol. 2019, 10, 1851–1859, doi:10.3762/bjnano.10.180

• the fact that all calculated values formally correspond to a temperature of zero Kelvin. In the future, metadynamic MD simulation studies might be performed, which should take into account both the effects of different gas loading conditions as well as temperature-dependent lattice vibrations and

Processing nanoporous organic polymers in liquid amines

• Jeehye Byun,
• Damien Thirion and
• Cafer T. Yavuz

Beilstein J. Nanotechnol. 2019, 10, 1844–1850, doi:10.3762/bjnano.10.179

• =O, and C–N–H stretching vibrations, respectively [26]. The strong peak at 1365 cm−1 in both COP-100-Film and COP-100-Precip. spectra were attributed to the ethylene C–H stretching vibration of EDA. The direct formation of the amide functionality could be possibly due to the easy condensation with

• -NP obtained from the solution (b). SEM image of COP-100 precipitates after the addition of (e) 5 equivalent EDA and (f) 8 equivalent EDA. FTIR spectra of COP-100, COP-100-Film, and COP-100-Precip. COP-100 exhibited two peaks at 3400 cm−1 and 1375 cm−1 of O–H and C–O stretching vibrations of the

The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

• Simon Krause,
• Volodymyr Bon,
• Hongchu Du,
• Rafal E. Dunin-Borkowski,
• Ulrich Stoeck,
• Irena Senkovska and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2019, 10, 1737–1744, doi:10.3762/bjnano.10.169

• ]. The diffuse reflectance Fourier transform (DRIFT) spectroscopy results show typical vibrations corresponding to the linker and OH groups of the MOFs in all materials (Supporting Information File 1, Figure S12). To analyze whether adsorption of water can promote contraction in small crystals of DUT

Tuning the performance of vanadium redox flow batteries by modifying the structural defects of the carbon felt electrode

• Ditty Dixon,
• Deepu Joseph Babu,
• Aiswarya Bhaskar,
• Hans-Michael Bruns,
• Joerg J. Schneider,
• Frieder Scheiba and
• Helmut Ehrenberg

Beilstein J. Nanotechnol. 2019, 10, 1698–1706, doi:10.3762/bjnano.10.165

• cm−1 and 1356 cm−1 are compared. The G-band in graphitic material arises from the in-plane vibration of sp2 carbon atoms. Whereas the D-band arises from out-of-plane vibrations from carbon associated with defects. Therefore, the ratio of the intensity of the D- and G-bands (ID/IG) gives direct

Layered double hydroxide/sepiolite hybrid nanoarchitectures for the controlled release of herbicides

• Ediana Paula Rebitski,
• Margarita Darder and
• Pilar Aranda

Beilstein J. Nanotechnol. 2019, 10, 1679–1690, doi:10.3762/bjnano.10.163

• intensity. In contrast, the intensity of the band at 3720 cm−1 associated with vibrations of Si–OH groups is attenuated in the hybrid nanoarchitectures, indicating that part of those silanol groups are in interaction with other species as observed in other modifications of sepiolite [44][45][46][47]. This

Subsurface imaging of flexible circuits via contact resonance atomic force microscopy

• Wenting Wang,
• Chengfu Ma,
• Yuhang Chen,
• Lei Zheng,
• Huarong Liu and
• Jiaru Chu

Beilstein J. Nanotechnol. 2019, 10, 1636–1647, doi:10.3762/bjnano.10.159

• advantages of easy operation and no special requirements for the tip and sample. In this method, the tip–sample contact is modulated with ultrasonic vibrations and the contact resonance of the AFM probe is monitored while scanning in contact mode. CR-AFM was started from the so-called atomic force acoustic

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• of zinc oxide contains an intense broad signal, corresponding to the stretching vibrations of Zn–O bonds (635–400 cm−1). The above spectrum also shows the signals from the multi-phonon vibrational modes of the ZnO lattice (990 and 870 cm−1). In accordance with the literature data, such oscillations

• asymmetric oscillations of the N–O bond. A broad peak in the region of 3750–3000 cm−1 is due to the stretching vibrations of hydroxy groups on the ZnO surface. The deformation vibrations of adsorbed water molecules are recorded at 1640 cm−1. In addition to these, the spectrum contains peaks related to the

• vibrations of the C–O bond in CO2 molecules adsorbed on the ZnO surface (2430–2320 cm−1) and C–H bonds (2920–2840 cm−1) in the residues of the organic components used in the synthesis of ZnO nanofibers. The FTIR absorption spectrum of the SiC sample contains two intense peaks with absorption maxima at 900 cm

Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices

• Giulia Lo Dico,
• Bernd Wicklein,
• Lorenzo Lisuzzo,
• Giuseppe Lazzara,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129

• significant variation in the amide I and amide II vibrations of the immobilized GOx enzyme with respect to unsupported GOx. This observation strongly supports that the adsorption of GOx in HNTs occurs via non-deteriorating electrostatic interactions [57]. This physical entrapment, in contrast to

A silver-nanoparticle/cellulose-nanofiber composite as a highly effective substrate for surface-enhanced Raman spectroscopy

• Yongxin Lu,
• Yan Luo,
• Zehao Lin and
• Jianguo Huang

Beilstein J. Nanotechnol. 2019, 10, 1270–1279, doi:10.3762/bjnano.10.126

• characteristic Raman scattering bands of R6G at relatively high concentrations (Figure 4; Supporting Information, Figure S6). As marked in Figure 4b, the bands located at 611, 771, and 1125 cm−1 are assigned to the C–C–C ring in-plane, out-of-plane bending, and C–H in-plane bending vibrations, respectively; and

• those at 1186, 1310, 1360, 1510, and 1575 cm−1 are associated with the totally symmetric modes of in-plane C–C–C stretching vibrations [63][64]. It is seen from the spectra in Figure 4a that the intensities of the Raman signals decreased along with the decrement of the concentrations of R6G. The most

• weaker and red-shifted to 1305 cm−1. Moreover, two new bands at 1382 and 1422 cm−1 attributed to the ring breathing vibrations of the thymine moiety of thymidine raised. These spectral features, which depend on the specific molecular orientation of the analyte on the silver surface, indicate the

Molecular attachment to a microscope tip: inelastic tunneling, Kondo screening, and thermopower

• Rouzhaji Tuerhong,
• Mauro Boero and
• Jean-Pierre Bucher

Beilstein J. Nanotechnol. 2019, 10, 1243–1250, doi:10.3762/bjnano.10.124

• accessible. This technique allows one to study locally the magnetic properties, as well as other elementary excitations and their mutual interaction. In particular a clear correlation is observed between the Kondo resonance and the vibrations with a strong incidence of the Kondo correlation on the

• to study, with atomic resolution, the coupling of the tunneling electrons to other elementary excitations such as vibrations, plasmons and spins [5][6][7][8]. Furthermore, a molecular junction in STM can serve as a reliable and controllable model system for the study of a single molecule in a way

Synthesis and characterization of quaternary La(Sr)S–TaS₂ misfit-layered nanotubes

• Marco Serra,
• Erumpukuthickal Ashokkumar Anumol,
• Dalit Stolovas,
• Iddo Pinkas,
• Ernesto Joselevich,
• Reshef Tenne,
• Andrey Enyashin and
• Francis Leonard Deepak

Beilstein J. Nanotechnol. 2019, 10, 1112–1124, doi:10.3762/bjnano.10.111

• Kisoda et al. [51], and were further elaborated in [32] and [43]. The range between 100–150 cm−1 was assigned to the intralayer vibrations of the LnS lattice (Ln = rare earth). The high energy range 250–400 cm−1 was associated with the intralayer vibrations of the hexagonal TaS2 lattice. The peak at 253

Scavenging of reactive oxygen species by phenolic compound-modified maghemite nanoparticles

• Małgorzata Świętek,
• Yi-Chin Lu,
• Rafał Konefał,
• Liliana P. Ferreira,
• M. Margarida Cruz,
• Yunn-Hwa Ma and
• Daniel Horák

Beilstein J. Nanotechnol. 2019, 10, 1073–1088, doi:10.3762/bjnano.10.108

• 1660 and 1566 cm−1 were attributed to C=O and N–H bending vibrations of the amide group, respectively. Furthermore, the peak at 1728 cm−1 was attributed to C=O stretching. The appearance of these new peaks suggested that the hydroxy and amine groups of the precursor chitosan were sensitive to the

• the γ-Fe2O3@Hep particles, several new peaks were observed at 2922, 2852, 1258, and 1038 cm−1 compared to the γ-Fe2O3 spectrum (Figure 3a). Peaks at 2922, 2852, and 1648 cm−1 were ascribed to C–H and C=O stretching vibrations of carboxyl groups. Peaks at 1258 and 1038 cm−1 corresponded to N–H and C–O

• stretching vibrations of the amine groups and polysaccharides, respectively. The similarity between the magnetic hysteresis of neat and heparin-modified nanoparticles indicated that the polymer-coated nanoparticles retained the same superparamagnetic behavior. However, a small decrease in the saturation

Fabrication of silver nanoisland films by pulsed laser deposition for surface-enhanced Raman spectroscopy

• Bogusław Budner,
• Mariusz Kuźma,
• Barbara Nasiłowska,
• Bartosz Bartosewicz,
• Malwina Liszewska and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2019, 10, 882–893, doi:10.3762/bjnano.10.89

• determined based on the intensity of the peak located at 1080 cm−1, which in the pMA molecule corresponds to vibrations of the C–S bond [34]. The calculated average values of EF of the Raman signal are presented in Table 2. As mentioned above, the average EF of the Raman signal depends on the wavelength of

Tungsten disulfide-based nanocomposites for photothermal therapy

• Tzuriel Levin,
• Hagit Sade,
• Rina Ben-Shabbat Binyamini,
• Maayan Pour,
• Iftach Nachman and
• Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

• cm−1 is characteristic of iron oxides, and represents the stretching vibration of Fe–O bond [53][54]. The peaks at 1640 cm−1 and 3400 cm−1 originate from interlayer water: the former is assigned H–O–H bending vibrations, and the latter to O–H stretching vibrations [53][54]. The peak at around 820 cm

• −1 might be assigned to Ce–O stretching vibrations [55]. In the spectrum of WS2-NT-CM-PEI, the peaks at 1050 cm−1 and 1640 cm–1 are a bit more accentuated compared to the WS2-NT-CM spectrum. These bands may be assigned to the C–N stretching vibrations and N–H stretching vibrations, respectively, of

• the PEI chains. The peak at 2350 cm−1 is typical to CO2, most likely captured by PEI [56]. In the spectrum of WS2-NT-CM-PAA, the peaks originating from the polyacrylic acid are dominant. The peak at 800 cm−1 is assigned to C–H bending vibrations in the PAA chain. The peaks in the range of 1000–1260 cm

An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO₂ hybrid composite

• Mamta Sham Lal,
• Thirugnanam Lavanya and
• Sundara Ramaprabhu

Beilstein J. Nanotechnol. 2019, 10, 781–793, doi:10.3762/bjnano.10.78

• characteristic peaks at 1587 and 1330 cm−1, corresponding to the G-band and D-band of typical carbonaceous materials, respectively. The D-band is related to disordered carbon, which shows vibrations with sp3 bonds in the crystal lattice defects which leads to disordered carbonaceous matrix. The G-band is

On the transformation of “zincone”-like into porous ZnO thin films from sub-saturated plasma enhanced atomic layer deposition

• Alberto Perrotta,
• Julian Pilz,
• Stefan Pachmajer,
• Antonella Milella and
• Anna Maria Coclite

Beilstein J. Nanotechnol. 2019, 10, 746–759, doi:10.3762/bjnano.10.74

• presence of organic functionalities is confirmed by the absorption in the region of 1300–1600 cm−1. The absorption in this region can be assigned to (a)symmetric (bidentate) OCO stretching vibrations in bicarbonates, carbonates, and formates (νOCO) due to the partial oxidation of the organic ligands. These

Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides

• Adam A. Marek,
• Vincent Verney,
• Christine Taviot-Gueho,
• Grazia Totaro,
• Laura Sisti,
• Annamaria Celli and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68

• displayed in Figure 4. The large, broad bands with maximum around 3400 cm−1 correspond to the O–H stretching vibrations of the hydroxide layers and water molecules located in the interlayered spaces or physically adsorbed on the surface of hybrids. The typical signals from amide functional groups (N–H, C=O

Topochemical engineering of composite hybrid fibers using layered double hydroxides and abietic acid

• Liji Sobhana,
• Lokesh Kesavan,
• Jan Gustafsson and
• Pedro Fardim

Beilstein J. Nanotechnol. 2019, 10, 589–605, doi:10.3762/bjnano.10.60

• galleries. The frequencies at 617 cm−1, 656 cm−1 and 783 cm−1 were attributed to M–O–M, M–OH, and O–M–O bond vibrations of LDH. The characteristic peaks of AA in C-HF are those at 2936 cm−1, 2650 cm−1, 1695 cm−1, 1670 cm−1 and 1277 cm−1. The vibration at 2936 cm−1 corresponds to C–H stretching absorption

• bands of –CH3, –CH2–CH and =CH. The band at 2650 cm−1 is due to intermolecular hydrogen bonding in –OH of dimeric –COOH groups. The band at 1695 cm−1 is the outcome of C=O stretching vibrations of acid groups, whereas 1670 cm−1 is due to C=C conjugated bonds and 1277 cm−1 is from C–O deformation

• vibrations of –COOH. Consequently, the presence of characteristic vibrational frequencies of functional groups confirmed the presence of cellulose, LDH and AA in the respective materials. Microscopic Studies Morphology Scanning electron microscopy (SEM) observations of the pulp fibers (REF, C-F, HF, C

Biomimetic synthesis of Ag-coated glasswing butterfly arrays as ultra-sensitive SERS substrates for efficient trace detection of pesticides

• Guochao Shi,
• Mingli Wang,
• Yanying Zhu,
• Yuhong Wang,
• Xiaoya Yan,
• Xin Sun,
• Haijun Xu and
• Wanli Ma

Beilstein J. Nanotechnol. 2019, 10, 578–588, doi:10.3762/bjnano.10.59

• adsorbed on 3D Ag-G.b. substrates with different Ag sputtering time. The characteristic peaks at 802, 915, 1172 and 1370 cm−1 correspond to C–H out-of-plane deformation, ring skeletal vibrations, C–H bending vibrations and C–C–C ring in-plane bending, respectively. The bands at 1532, 1585 and 1619 cm−1

Hydrophilicity and carbon chain length effects on the gas sensing properties of chemoresistive, self-assembled monolayer carbon nanotube sensors

• Juan Casanova-Cháfer,
• Carla Bittencourt and
• Eduard Llobet

Beilstein J. Nanotechnol. 2019, 10, 565–577, doi:10.3762/bjnano.10.58

• because the vibrations of the aromatic ring carbon chain appear in the region near 1500 cm−1. Figure 3a confirms the presence of thiols in thiol-Au-MWCNT samples, however, Figure 3b shows that some of these thiols remain unattached to Au. The 2550–2600 cm−1 region was analyzed in order to find the strong