Polymorphic self-assembly of pyrazine-based tectons at the solution–solid interface

• Achintya Jana,
• Puneet Mishra and
• Neeladri Das

Beilstein J. Nanotechnol. 2019, 10, 494–499, doi:10.3762/bjnano.10.50

• pyrazine ring at the para-positions, making an angle of 180° between the two binding sites, giving it a linear shape (Figure 1). Details of the synthesis of the molecule, and its characterization by means of FTIR, 1H and 13C NMR, mass spectrometry, and single crystal X-ray diffraction are provided in

Reduced graphene oxide supported C₃N₄ nanoflakes and quantum dots as metal-free catalysts for visible light assisted CO₂ reduction

• Md Rakibuddin and
• Haekyoung Kim

Beilstein J. Nanotechnol. 2019, 10, 448–458, doi:10.3762/bjnano.10.44

• existence of an interaction between rGO and g-C3N4 inside the composite. FTIR spectra further confirm (Figure 4) the formation of C3N4 NFs and QDs, as well as the structural changes of C3N4 nanosheets. The peaks at around 3000–3110 cm−1, 1200–1650 cm−1 and 810 cm−1 are due to the N–H stretching vibration

• a small span of time (5 h). During the acid treatment process, some C–N bonds of the s-triazine units of the g-C3N4 sheet are oxidized and oxygen-containing carboxylate functional groups are generated at the edge and on the basal plane [19] as indicated by FTIR spectra (Figure 4). This results in

• °. XPS was conducted using a Thermo Kα XPS (Thermo Fisher Scientific). FESEM was carried out using an S-4800, Hitachi Ltd. instrument (acceleration voltage, 5 kV), and TEM was conducted with a Tecnai G2 F20 S-TWIN microscope. FTIR spectra were recorded with a Perkin Elmer Spectrum 100 spectrometer, and

Nanocomposite–parylene C thin films with high dielectric constant and low losses for future organic electronic devices

• Marwa Mokni,
• Gianluigi Maggioni,
• Abdelkader Kahouli,
• Sara M. Carturan,
• Walter Raniero and
• Alain Sylvestre

Beilstein J. Nanotechnol. 2019, 10, 428–441, doi:10.3762/bjnano.10.42

• greater roughness than sample D maybe due to a larger nanoparticle size. To summarize, film thickness, AgOx nanoparticle size and, to a lesser extent, Ag content concur to affect the roughness of the NCPC samples. FTIR analysis According to the FTIR analysis (Figure 5), the main spectral features of

• transform infrared spectrometer (FTIR, Nicolet 380) in reflectance mode at a resolution of 4 cm−1 in a wave number range from 400 to 3200 cm−1. The spectra were obtained after a previous background subtraction with 32 scans for each sample to remove the contribution of H2O and CO2 molecules. Dielectric

• shown. Asterisks indicate the peaks of Ag oxides. Si peaks coming from the substrate are also highlighted. Roughness (Ra) as a function of the thickness. The red curve is the trend for pure parylene C films obtained in [65]. FTIR spectra of pure parylene C (samples O and K) and NCPCs (samples A to F). a

Biocompatible organic–inorganic hybrid materials based on nucleobases and titanium developed by molecular layer deposition

• Leva Momtazi,
• Henrik H. Sønsteby and
• Ola Nilsen

Beilstein J. Nanotechnol. 2019, 10, 399–411, doi:10.3762/bjnano.10.39

• support that the as-deposited films mainly consist of titanium and their respective bases, while these bases are more or less fully leached out during immersion in water leaving a TiO2 surface. The FTIR analysis of the hybrid films provides information about the presence of the organic moieties and also

• the resulting bonding modes between metal and organic molecules. Determining the bonding modes for nucleobases with FTIR is not as straight forwards as for amino acids (as can be seen in [22]); however, comparing characteristic bands of nucleobases before and after coordination with the metal atom can

• provide information about binding sites in the organic moieties. For thymine, two very strong bands at 1741 and 1676 cm−1 are observed in the FTIR spectra of Figure 15a. The lower wavenumber has been assigned to both the stretching vibration of C=C and C4=O, and the vibrational band at 1741 cm−1

One-step nonhydrolytic sol–gel synthesis of mesoporous TiO₂ phosphonate hybrid materials

• Yanhui Wang,
• P. Hubert Mutin and
• Johan G. Alauzun

Beilstein J. Nanotechnol. 2019, 10, 356–362, doi:10.3762/bjnano.10.35

• a small amount of noncondensed diethyl octylphosphonate precursor, possibly molecules trapped in the network of this nonporous sample (see below). The attenuated total reflection (ATR)-Fourier transform infrared (FTIR) spectra of the TiO2–octylphosphonate hybrid materials (Figure 2) showed a single

• reaction, the resulting monoliths were thoroughly washed with acetone (5 times, 30 mL). Then, they were dried under reduced pressure (5.10−2 mbar) at room temperature and ground into a fine powder. Characterization FTIR spectra were collected in ATR mode on a Spectrum II spectrometer (Perkin-Elmer). The

• )4 and acetophenone (TiO2-octylphosphonate hybrids). ATR-FTIR spectra of the TiO2–octylphosphonate hybrid materials. Powder XRD patterns of the TiO2–octylphosphonate hybrid materials. Raman spectra of TiO2–octylphosphonate hybrid materials and TiO2. SEM images of TiO2–octylphosphonate hybrid

Removal of toxic heavy metals from river water samples using a porous silica surface modified with a new β-ketoenolic host

• Said Tighadouini,
• Smaail Radi,
• Abderrahman Elidrissi,
• Khadija Haboubi,
• Maryse Bacquet,
• Stéphanie Degoutin,
• Mustapha Zaghrioui and
• Yann Garcia

Beilstein J. Nanotechnol. 2019, 10, 262–273, doi:10.3762/bjnano.10.25

• characterized by elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) images, thermogravimetric analysis (TGA) and nitrogen adsorption–desorption isotherms. Physical methods. Atomic adsorption measurements were performed on a Varian A.A. 400 spectrophotometer

• . pH determinations were carried out with a pH 2006, J. P. Selecta s. a. pH meter. Microanalysis was performed at the Microanalysis Centre Service (CNRS). FTIR spectra were recorded on a Perkin Elmer System 2000 device. SEM imaging was run on a FEI-Quanta 200 microscope. TG/DTA were performed on a

• -3-(pyridin-2-yl)prop-2-en-1-one was successful. FTIR spectra of original silica gel (SiG), SiNH2 and SiNL are shown in Figure 1. The characteristics of the precursor materials (SiG, SiNH2) are consistent with literature [44][45][46][47][48]. In the SiNL spectrum, the stretching vibration of O–H band

New micro/mesoporous nanocomposite material from low-cost sources for the efficient removal of aromatic and pathogenic pollutants from water

• Emmanuel I. Unuabonah,
• Robert Nöske,
• Jens Weber,
• Christina Günter and
• Andreas Taubert

Beilstein J. Nanotechnol. 2019, 10, 119–131, doi:10.3762/bjnano.10.11

• FTIR, 4000–400 cm−1, 40 Scans) using KBr pellets prepared with a Shimadzu MHP-1 mini hand press. The background correction was performed with a pure KBr pellet, and the samples were measured at 10% in 90% KBr. UV–vis spectroscopy was performed on a Shimadzu 1650pc UV–vis spectrophotometer for analysis

• ZnCl2 (732 °C) due to the evaporation of ZnCl2 [30]. Analysis of chemical functionalities Figure 3 shows selected FTIR spectra of 2Z-HYCA prepared at different temperatures. The signals are indicative of surface octahedral –OH groups at 3697, 3670, and 3649 cm−1, which are observed in the spectra of the

• of 31.25, 36.82°, 55.62°, 59.32° and 65.19°), which can be assigned to a new Al2ZnO4-phase (ghn, gahnite-type JCPDF 98-007-5098). Interestingly, the new materials prepared in this study exhibit no ZnO phase, as seen from the FTIR or XRD spectra, unlike in our previous studies [21]. This behavior is

A novel polyhedral oligomeric silsesquioxane-modified layered double hydroxide: preparation, characterization and properties

• Xianwei Zhang,
• Zhongzhu Ma,
• Hong Fan,
• Carla Bittencourt,
• Jintao Wan and
• Philippe Dubois

Beilstein J. Nanotechnol. 2018, 9, 3053–3068, doi:10.3762/bjnano.9.284

• ]. Thereafter, the acylation reaction of OCPS with succinic anhydride was carried out to afford OCPS. The 1H NMR, 13C NMR and 29Si NMR spectra of OAPS and OCPS presented in Figure 2 and the MALDI-TOF-MS spectra, XRD patterns and FTIR spectra of OAPS and OCPS in Figure 3a–c reveal the well-defined structures

• ), 0.70 (m, SiCH2, 16H); 13C NMR (DMSO-d6) δ 41.03 (s, CH2N), 20.64 (s, SiCH2CH2), 8.46 (s, SiCH2); 13C NMR (D2O) δ 41.63 (d, CH2N), 20.55 (d, SiCH2CH2), 8.76 (m, SiCH2); 29Si NMR (DMSO-d6) δ −66.50 (s); MALDI-TOF-MS (DHB matrix, m/z): [M + H − 8HCl]+ calcd 881.29; found, 881.39 (100%); FTIR (KBr): υ(–NH3

• , m/z): [M + H]+ calcd 1681.42, found 1681.72; [M + Na]+ calcd 1703.70; found, 1704.70; [M + K]+ calcd 1719.37; found, 1719.67; FTIR (KBr): υ(-COOH) 3300 cm−1, δ(–COOH) 1432 cm−1, υ(–COOH) 1701 cm−1, υ(–NHC=O) 1645 cm−1, υ(Si–O–Si) 1150–1110 cm−1, υ(Si–C) 800 cm−1; XRD: 2θ 7.23°, 9.41°, 9.75°, 10.25

Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene

• Qian Zhang,
• Qiyu Gu,
• Fabrice Leroux,
• Pinggui Tang,
• Dianqing Li and
• Yongjun Feng

Beilstein J. Nanotechnol. 2018, 9, 2980–2988, doi:10.3762/bjnano.9.277

• to the co-intercalation. The results show that co-precipitation yields Ca2Al-LDHs free of CaCO3 by-product [23]. Figure 3 shows FTIR spectra of all the HnMn′-Ca2Al-LDHs. One can observe characteristic stretching-vibration bands of LDHs, for example, the broad band at ca. 3445 cm−1 associated to the

• in the composite. Figure 7a depicts the FTIR spectra of HnMn′-Ca2Al/PP composites in absorbance mode. Here, all composites present the characteristic bands of PP: 2950, 2915, 2868, 2837, 1454, and 1375 cm−1. Some additional bands assigned to LDHs and guest anions are also observed after addition of

• of HnMn′-Ca2Al/PP composites is obviously improved. Figure 8b shows the thermal degradation of HnMn′-Ca2Al/PP composite films at 150 °C as a function of aging time, recorded by FTIR. With increasing thermal-aging time, the intensity of the carbonyl peak of the PP film (without filler) significantly

Hybrid Au@alendronate nanoparticles as dual chemo-photothermal agent for combined cancer treatment

• Anouchka Plan Sangnier,
• Romain Aufaure,
• Laurence Motte,
• Claire Wilhelm,
• Erwann Guenin and
• Yoann Lalatonne

Beilstein J. Nanotechnol. 2018, 9, 2947–2952, doi:10.3762/bjnano.9.273

• spectroscopy (FTIR) comparing the coated gold NPs (red curve) with free alendronate (black curve). Large modifications were observed within the PO region (900–1200 cm−1). The free alendronate spectrum exhibits two sharp peaks at 1211 and 957 cm−1, assigned to P=O and P–OH, respectively [31]. The broad band at

• special attention to alendronate release under photothermal activation. Au@alendronate NPs characterization: (a) transmission electron microscopy (TEM) image (left) and size distribution (right), (b) UV–vis spectrum, (c) FTIR spectra of Au@alendronate NPs (red curve) versus alendronate (black) curve, (d

Magnetic and luminescent coordination networks based on imidazolium salts and lanthanides for sensitive ratiometric thermometry

• Pierre Farger,
• Cédric Leuvrey,
• Mathieu Gallart,
• Pierre Gilliot,
• Guillaume Rogez,
• João Rocha,
• Duarte Ananias,
• Pierre Rabu and
• Emilie Delahaye

Beilstein J. Nanotechnol. 2018, 9, 2775–2787, doi:10.3762/bjnano.9.259

• a JEOL 6700F (scanning electron microscope (SEM) equipped with a field-emission gun (FEG), operating at 3 kV in the SEI mode instrument. FTIR spectra were collected on a Perkin Elmer Spectrum Two UATR-FTIR spectrometer. TGA-TDA experiments were performed using a TA instrument SDT Q600 (heating rates

Low cost tips for tip-enhanced Raman spectroscopy fabricated by two-step electrochemical etching of 125 µm diameter gold wires

• Antonino Foti,
• Francesco Barreca,
• Enza Fazio,
• Cristiano D’Andrea,
• Paolo Matteini,
• Onofrio Maria Maragò and
• Pietro Giuseppe Gucciardi

Beilstein J. Nanotechnol. 2018, 9, 2718–2729, doi:10.3762/bjnano.9.254

• atomic-level resolution. The presence of commercial setups on the market has further increased the application of TERS outside of the traditional chemistry and physics laboratories, suggesting TERS could be used as a future routine characterization tool like AFM, UV–vis, Raman or FTIR spectroscopies. The

Nanoantenna structures for the detection of phonons in nanocrystals

• Alexander G. Milekhin,
• Sergei A. Kuznetsov,
• Ilya A. Milekhin,
• Larisa L. Sveshnikova,
• Tatyana A. Duda,
• Ekaterina E. Rodyakina,
• Alexander V. Latyshev,
• Volodymyr M. Dzhagan and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2018, 9, 2646–2656, doi:10.3762/bjnano.9.246

• controlled by optical microscopy. The diameter of the CdS and PbS NCs determined from SEM measurements was found to be 4.5 ± 1.5 nm and 7 ± 3 nm, respectively [23], while the diameter of the colloidal CdSe NCs purchased from Lumidot was 5.0 ± 0.3 nm. FTIR transmission measurements of Au nano- and

Cytotoxicity of doxorubicin-conjugated poly[N-(2-hydroxypropyl)methacrylamide]-modified γ-Fe₂O₃ nanoparticles towards human tumor cells

• Zdeněk Plichta,
• Yulia Kozak,
• Rostyslav Panchuk,
• Viktoria Sokolova,
• Matthias Epple,
• Lesya Kobylinska,
• Pavla Jendelová and
• Daniel Horák

Beilstein J. Nanotechnol. 2018, 9, 2533–2545, doi:10.3762/bjnano.9.236

• /mL) to obtain γ-Fe2O3@PHPMA. Second, P(HPMA-MMAA)-Dox (0.1–13.0 µg) was dissolved in aqueous γ-Fe2O3@PHPMA colloid (2–260 µg; 50 mg γ-Fe2O3/mL) to get γ-Fe2O3@P(HPMA-MMAA)-Dox before use in the cell experiments. Characterization methods 1H NMR (in CDCl3) and FTIR spectra of MMAA were recorded on a

• methyl ester of sarcosine was methacryloylated. Structure and purity of MMAA was confirmed by 1H NMR (Figure 1a), gas chromatography (Figure 1b), and FTIR spectroscopy (Figure 1c). The FTIR spectrum exhibited characteristic peaks at 1745 and 1620 cm−1 ascribed to strong C=O stretching vibrations of ester

• of the copolymer was confirmed by the FTIR spectrum exhibiting characteristic peaks at 2973 and 2933 cm−1 ascribed to CH stretching vibrations. The peak at 1729 cm−1 belongs to C=O ester stretching vibrations and those at 1631 and 1528 cm−1 were attributed to C=O and NH amide stretching and bending

Non-agglomerated silicon–organic nanoparticles and their nanocomplexes with oligonucleotides: synthesis and properties

• Asya S. Levina,
• Marina N. Repkova,
• Nadezhda V. Shikina,
• Zinfer R. Ismagilov,
• Svetlana A. Yashnik,
• Dmitrii V. Semenov,
• Yulia I. Savinovskaya,
• Natalia A. Mazurkova,
• Inna A. Pyshnaya and
• Valentina F. Zarytova

Beilstein J. Nanotechnol. 2018, 9, 2516–2525, doi:10.3762/bjnano.9.234

• Si–NH2 solution was recorded on a Cary 660 FTIR spectrometer (Agilent Technologies, USA) within the range of 4000–500 cm−1 at 4 cm−1 resolution, and 100 scans were accumulated in the attenuated total reflectance (ATR) mode using a GladiATR unit (Pike Technologies). The spectrum of the substance is

Enhanced antineoplastic/therapeutic efficacy using 5-fluorouracil-loaded calcium phosphate nanoparticles

• Shanid Mohiyuddin,
• Saba Naqvi and
• Gopinath Packirisamy

Beilstein J. Nanotechnol. 2018, 9, 2499–2515, doi:10.3762/bjnano.9.233

• -transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The antineoplastic potential of the CaP@5-FU NPs against colorectal and lung cancer cells was reported. The CaP@5-FU NPs were found to inhibit half the population (IC50) of lung adenocarcinoma (A549) cells at 32 μg/mL and colorectal (HCT

• loading (Figure 2C). The characteristic FTIR peaks were found in both unloaded and drug-loaded nanoparticles, which was confirmed by the PO43− peaks at 1089 and 1046 cm−1 and corresponds to previous reports [32]. The calcium phosphate nanoparticles exhibited FTIR peaks in the range of 1000–1100 cm−1

• , corresponding to the phosphate bending. Evidence of P=O bonds was confirmed by a peak at 1200–1100 cm−1 [32] in the two nanoparticle samples synthesized in addition to P–O bonds in the range of 1100–1000 cm−1. In addition, the FTIR spectrum of 5-FU alone was collected for comparative analysis as shown in Figure

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

Nanoconjugates of a calixresorcinarene derivative with methoxy poly(ethylene glycol) fragments for drug encapsulation

• Alina M. Ermakova,
• Julia E. Morozova,
• Yana V. Shalaeva,
• Victor V. Syakaev,
• Aidar T. Gubaidullin,
• Alexandra D. Voloshina,
• Vladimir V. Zobov,
• Irek R. Nizameev,
• Olga B. Bazanova,
• Igor S. Antipin and
• Alexander I. Konovalov

Beilstein J. Nanotechnol. 2018, 9, 2057–2070, doi:10.3762/bjnano.9.195

• and FTIR. Its molecular weight was measured by static light scattering (SLS) and MALDI-TOF. In the 1H NMR spectrum of 3 signals of ethyleneoxy and methoxy groups at 3.65 and 3.37 ppm, respectively, are observed; signals of bridged methylidene groups and aromatic groups are very broad (Figure 1b). Also

• the NMR time scale and, consequently, to the broadening of the signals of calixresorcinarene platform in the NMR spectra. The same broadening in the spectra of tetraundecylcalix[4]resorcinarene with poly-ε-caprolactone fragments on the upper rim was described earlier [22]. In the FTIR spectrum of 3

• methanol were consecutively applied onto the target and evaporated. An aqueous solution of cesium chloride (CsCl) at a concentration of 1 mg/mL was added to improve the ionization of the analyzed sample. IR spectra were recorded with a Bruker Vector 22 FTIR Spectrometer (Bruker Optics, USA) in KBr pellets

Synthesis of a MnO₂/Fe₃O₄/diatomite nanocomposite as an efficient heterogeneous Fenton-like catalyst for methylene blue degradation

• Zishun Li,
• Xuekun Tang,
• Kun Liu,
• Jing Huang,
• Yueyang Xu,
• Qian Peng and
• Minlin Ao

Beilstein J. Nanotechnol. 2018, 9, 1940–1950, doi:10.3762/bjnano.9.185

• Fourier transform infrared spectroscopy (FTIR) using a Nicolet Nexus 670 spectrometer. The morphology of samples was observed with a TESCAN MIRA3 LMU scanning electron microscope (SEM) and a JEOL JEM-1200EX transmission electron microscope (TEM). The X-ray photoelectron spectroscopy (XPS) measurements

• . However, the original characteristic peaks of magnetite are weakened. This indicates that the nano-MnO2 covering on the Fe3O4/diatomite is of low crystallinity or amorphous. Figure 2 shows the FTIR spectra of purified diatomite, Fe3O4/diatomite and MnO2/Fe3O4/diatomite. The broad peaks at 3400 and 1630 cm

• organic pollutants. XRD patterns of the purified diatomite and the prepared diatomite-supported composites. FTIR spectra of the purified diatomite and prepared diatomite-supported composites. The SEM images of diatomite (a), Fe3O4/diatomite (b, d), MnO2/Fe3O4/diatomite (c and e), EDX spectrum (f) and

Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent

• Can Zhao,
• Yuexiao Song,
• Tianyu Xiang,
• Wenxiu Qu,
• Shuo Lou,
• Xiaohong Yin and
• Feng Xin

Beilstein J. Nanotechnol. 2018, 9, 1770–1781, doi:10.3762/bjnano.9.168

• were observed by scanning electron microscopy (SEM, ZEISS, Germany) and transmission electron microscopy (TEM, JEM-2100F, Japan). Energy dispersive X-ray (EDX) analysis was recorded via an EDX spectrometer attached to the SEM. The functional groups on the surface of the samples were measured by FTIR

• spectra on a Nicolet Nexus FTIR spectrometer using the KBr method within the wavelength range of 400–4000 cm−1. Nitrogen adsorption–desorption isotherms were obtained at 77 K on an Autosorb–iQ2–MP nitrogen adsorption apparatus. The Brunauer–Emmett–Teller (BET) specific surface area of the samples was

• carbonization of PDA above 650 °C. After calcination of pure CoAl LDH in a nitrogen atmosphere at 800 °C, only Co3O4 and CoAl2O4 mixtures are obtained (Figure 1f). The successful coating of PDA on the surface of CoAl LDH is verified by FTIR spectra (Figure S1 in Supporting Information File 1). The

Nanocomposites comprised of homogeneously dispersed magnetic iron-oxide nanoparticles and poly(methyl methacrylate)

• Sašo Gyergyek,
• David Pahovnik,
• Ema Žagar,
• Alenka Mertelj,
• Rok Kostanjšek,
• Miloš Beković,
• Marko Jagodič,
• Heinrich Hofmann and
• Darko Makovec

Beilstein J. Nanotechnol. 2018, 9, 1613–1622, doi:10.3762/bjnano.9.153

• NMR and FTIR spectra, respectively (Supporting Information File 1, Figures S1 and S2). The shift of the peak for the methine group, denoted with D, from 3.62 ppm in the 1H NMR spectrum of the original ricinoleic acid to 4.88 ppm in the 1H NMR spectrum of RA-MMA, and a pronounced increase in intensity

• enhanced in the NP-MMA sample when compared to the NP-RA sample (Figure 2), indicating the formation of the methacrylate ester, as depicted in Scheme 1. After polymerization (NP-PMMA-3) the FTIR spectrum shows the characteristic features of PMMA (Figure 2). Based on these results we can conclude that the

• reactions involved in the preparation of the nanocomposites. Supporting Information Additional description of materials used and the synthesis and characterization of nanocomposite materials. Additional FTIR and NMR spectra, TGA curves, a correlation function of the suspensions and TEM images showing the

Closed polymer containers based on phenylboronic esters of resorcinarenes

• Tatiana Yu. Sergeeva,
• Rezeda K. Mukhitova,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Polina D. Klypina,
• Albina Y. Ziganshina and
• Alexander I. Konovalov

Beilstein J. Nanotechnol. 2018, 9, 1594–1601, doi:10.3762/bjnano.9.151

• the region of 4000–400 cm−1 by using a Bruker Vector-22 FTIR-spectrophotometer with a resolution of 4 cm−1. Samples for the registration of the IR spectra were prepared in KBr pellets. NMR spectroscopic experiments were carried out with an Avance 600 spectrometer (Bruker, Germany) equipped with a

Colorimetric detection of Cu²⁺ based on the formation of peptide–copper complexes on silver nanoparticle surfaces

• Gajanan Sampatrao Ghodake,
• Surendra Krishna Shinde,
• Rijuta Ganesh Saratale,
• Avinash Ashok Kadam,
• Ganesh Dattatraya Saratale,
• Asad Syed,
• Fuad Ameen and
• Dae-Young Kim

Beilstein J. Nanotechnol. 2018, 9, 1414–1422, doi:10.3762/bjnano.9.134

• characterized by high-resolution transmission electron microscopy (HR-TEM), XPS, XRD, and Fourier-transform infrared (FTIR) spectroscopy. The shape of the SPR peak determined the qualitative characterization of the AgNPs, and the size range of the particles in solution concurred with the HR-TEM images. As can

• of AgNPs and to identify their crystalline structure (Figure 3a). The diffraction peaks at scattering angles, 2θ, of 38.25°, 44.42°, 64.51° and 77.55° were assigned to the crystallographic planes (111), (200), (220) and (311), respectively. FTIR was performed to examine the capping of casein peptides

• grids. Shape, size-distribution, and images were observed on Tecnai G2 (FEI Company, USA). The XRD measurements were performed using a thin film sample containing the AgNPs (Rigaku Ultima-IV diffractometer, Cu Kα radiation). The centrifuged AgNPs were examined by FTIR spectroscopy using a Thermo

Induced smectic phase in binary mixtures of twist-bend nematogens

• Anamarija Knežević,
• Irena Dokli,
• Marin Sapunar,
• Suzana Šegota,
• Ute Baumeister and
• Andreja Lesac

Beilstein J. Nanotechnol. 2018, 9, 1297–1307, doi:10.3762/bjnano.9.122

• in controlling the self-organizing processes. Keywords: binary mixture; liquid crystals; smectic phase induction; temperature-dependent FTIR; twist-bend nematogen; Introduction Nowadays liquid crystal (LC) substances possess a wide range of uses. However, it is rather rare that a single organic

• of pure compounds shows no new absorption band (Figure S3, Supporting Information File 1). The peak at 290 nm present in pure CBI shifts toward lower wavelengths as the ratio of BB in the mixture rises, approaching the value of 266 nm characteristic of pure BB. Since FTIR spectroscopy is a sensitive

• technique for determining changes in chemical interactions and molecular geometry in LC phases [37][38][39][40], we investigated the 73 mol % BB mixture using temperature-dependent FTIR measurements. IR spectra were recorded using a KBr pastille method. Since in a binary mixture the cyano group of CBI may

Heavy-metal detectors based on modified ferrite nanoparticles

• Urszula Klekotka,
• Ewelina Wińska,
• Elżbieta Zambrzycka-Szelewa,
• Dariusz Satuła and
• Beata Kalska-Szostko

Beilstein J. Nanotechnol. 2018, 9, 762–770, doi:10.3762/bjnano.9.69

• metals Cd, Cu and Pb. The obtained nanoparticles were structurally characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Mössbauer spectroscopy. The amounts of Cd, Cu and Pb were measured out by atomic absorption spectroscopy