Comparison of the interactions of daunorubicin in a free form and attached to single-walled carbon nanotubes with model lipid membranes

• Dorota Matyszewska

Beilstein J. Nanotechnol. 2016, 7, 524–532, doi:10.3762/bjnano.7.46

• hydrazone. The detailed procedure of the covalent end modification of single-walled carbon nanotubes with daunorubicin by the formation of hydrazone was inspired by the protocol previously described for side and end carboxylated SWCNTs modification [25]. Basing on the TGA analysis such modification

Single-molecule mechanics of protein-labelled DNA handles

• Vivek S. Jadhav,
• Dorothea Brüggemann,
• Florian Wruck and
• Martin Hegner

Beilstein J. Nanotechnol. 2016, 7, 138–148, doi:10.3762/bjnano.7.16

• and coupling to polystyrene beads PCR amplification of plasmid pTYB1 (7477 bp, New England Biolabs, Ireland (NEB)) with 5’-biotin (5’-AAT TCT TGA AGA CGA AAG GGC GGC-3’ for 4056 bp DNA and 5’-GGA TAC GAC GAT ACC GAA GAC AGC-3’ for 3034 bp DNA) and 5’-thiol or 5’-DIG end-modified primers (both have the

• sequence 5’-TGT AAC TCG CCT TGA TCG TTG GGA-3’) were used to prepare DNA molecules (4056 and 3034 bp). BSAI linearized pNEB193 plasmids (2713 bp, NEB) were used to produce the 1000 bp long dsDNA handles. Here the primers 5’-biotin CAA CTG TTG GGA AGG GCG ATC-3’ and 5’-DIG-CTG TTA CCA GTG GCT GCT GCC-3

• coupled to amino beads with an average of 50 DNA molecules per bead (Figure 1b). A dsDNA linker of 24 bp length with biotinylated 3’- and 5’-ends was formed from two complementary single DNA strands (sequence: biotin-5’-AAT TCT TGA AGA CGA AAG GGC GGC-3’-biotin and its complementary sequence 5’-GCC GCC

Green and energy-efficient methods for the production of metallic nanoparticles

• Mitra Naghdi,
• Mehrdad Taheran,
• Satinder K. Brar,
• M. Verma,
• R. Y. Surampalli and
• J. R. Valero

Beilstein J. Nanotechnol. 2015, 6, 2354–2376, doi:10.3762/bjnano.6.243

• observed that their Ag NPs have spherical shape with diameters of 6–8 nm [56][99]. An et al. prepared Ag NPs using CTS as stabilizer agent after stirring the aqueous solution for 30 min at 30 °C. Their SEM micrographs showed a regular spherical shape with less than 20 nm in size and also their TGA analysis

Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties

• Uliana Kostiv,
• Miroslav Šlouf,
• Hana Macková,
• Alexander Zhigunov,
• Hana Engstová,
• Katarína Smolková,
• Petr Ježek and
• Daniel Horák

Beilstein J. Nanotechnol. 2015, 6, 2290–2299, doi:10.3762/bjnano.6.235

• and time on the properties of the particles was investigated. The nanoparticles were characterized by transmission electron microscopy (TEM), electron diffraction (ED), energy dispersive spectroscopy (EDX), dynamic light scattering (DLS), thermogravimetric analysis (TGA), elemental analysis and X-ray

• particle size (Dh) was measured using dynamic light scattering (DLS) on a ZEN 3600 Zetasizer Nano Instrument (Malvern Instruments; Malvern, UK) at pH 1. Thermogravimetric analysis (TGA) was performed in air using a Perkin Elmer TGA 7 analyzer (Norwalk, CT, USA) from 30 to 850 °C at a heating rate of 10

• relatively high amounts of coating (23 and 21 wt % according to C and N analysis, respectively). The OM content on the OM–NaYF4:Yb3+/Er3+ nanoparticles prepared at different reaction temperatures was also determined by TGA (Figure 6a). Small weight losses (ca. 1 wt %) observed upon heating from room

Fabrication of hybrid nanocomposite scaffolds by incorporating ligand-free hydroxyapatite nanoparticles into biodegradable polymer scaffolds and release studies

• Balazs Farkas,
• Marina Rodio,
• Ilaria Romano,
• Alberto Diaspro,
• Romuald Intartaglia and
• Szabolcs Beke

Beilstein J. Nanotechnol. 2015, 6, 2217–2223, doi:10.3762/bjnano.6.227

• into biodegradable polymer resin. We also present HA NPs release studies. Results and Discussion Materials characterization In order to evaluate the effects of nanoparticle incorporation, the cured resins have been characterized through nanoindentation, thermogravimetric analysis (TGA), profilometry

• nanoindentations. For TGA and FTIR, the same 20 layer, 5 mm diameter non-porous samples were used. For all 3D scaffolds, the layer thickness was adjusted to 100 µm. Most results were then compared to our previously acquired data. Figure 1 shows a TEM image of hydroxyapatite colloidal solution (Figure 1a) prepared

• achieve direct compatibility between the particles and the PPF resin. As seen in Figure 2a, the added nanoparticles only barely affected the penetration depth of the light from the XeCl excimer laser (308 nm) even with the highest particle concentration. On the other hand, TGA (Figure 2a inset) and

A single-source precursor route to anisotropic halogen-doped zinc oxide particles as a promising candidate for new transparent conducting oxide materials

• Daniela Lehr,
• Markus R. Wagner,
• Johanna Flock,
• Julian S. Reparaz,
• Clivia M. Sotomayor Torres,
• Alexander Klaiber,
• Thomas Dekorsy and
• Sebastian Polarz

Beilstein J. Nanotechnol. 2015, 6, 2161–2172, doi:10.3762/bjnano.6.222

• Cary 100 scan UV–vis spectrophotometer equipped with an Ulbricht reflecting sphere. TGA analysis was performed on a Netzsch STA 449F3. EDX spectra were acquired on a Hitachi TM 3000 SEM equipped with a Bruker Quantax 70 detector. Dielectric measurements were performed with a Zahner IM6. For each sample

• detail. We chose a thermal route for the transformation of the precursors into the final materials. Thermogravimetric analysis (TGA) reveals important information about the thermal behavior of the anticipated single source precursor [Cl(Et)3Zn4(OiPr)4] (Figure 2a). It can be seen that there is hardly any

• difference between the TGA traces in inert atmosphere (N2) and in air (20% O2), which indicates that oxygen is not pivotal for the complete transformation of the precursor. The latter is an important criterion for a single-source precursor, and an advantage because oxygen can also react with halogens at

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

• (VSM), energy dispersive X-ray diffraction (EDXD), dynamic light scattering (DLS), and thermogravimetric analysis (TGA). Results and Discussion In this study we successfully designed, synthesized, and compared two hybrid magnetic–gold nanocomposites by applying chitosan and one of its well-known

• [35]. Given that the applications of such nanoparticles are based on their sufficient magnetic properties, the use of TMC (with better magnetic properties as compared to the classical chitosan system) is recommended, especially in biomedical applications. Thermogravimetric analysis (TGA) During the

• TGA measurement (Figure 9), the first major weight loss occurred at 25–300 °C, which is related to the removal of intramolecular, chemisorbed and physisorbed water [45]. As previously reported, the second weight loss step arises from the decomposition of organic compounds, such as the polymers, which

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

• a 10 nm thick organic layer to provide long-term protection in air for the highly reactive zerovalent iron core up to 180 °C. The surface-modified iron NPs possess a high grafting density of the aryl group on the NPs surface of 1.23 mmol/g. FTIR spectroscopy, XRD, HRTEM, TGA/DTA, and elemental

• NPs. Methods such as FTIR, XRD, HREM, TGA/DTA, and elemental analysis were used to characterize the structure of the obtained ZVI NPs. We also believe that this novel synthetic approach will not only be useful for the preparation of iron NPs but also provide a general functionalization strategy for

• elemental analysis, TGA/DTA curves, core size distribution, specific surface area and magnetization curve. Acknowledgements This work was financially supported by the Ministry of Education and Science of the Russian Federation (project “Science” No. 4.2569.2014/K). G.K.A is also thankful the Ministry of

Transformation of hydrogen titanate nanoribbons to TiO₂ nanoribbons and the influence of the transformation strategies on the photocatalytic performance

• Melita Rutar,
• Nejc Rozman,
• Matej Pregelj,
• Carla Bittencourt,
• Romana Cerc Korošec,
• Andrijana Sever Škapin,
• Aleš Mrzel,
• Srečo D. Škapin and
• Polona Umek

Beilstein J. Nanotechnol. 2015, 6, 831–844, doi:10.3762/bjnano.6.86

• illumination of the samples in an EPR cavity. An Oxford Cryogenics continuous-flow liquid He cryogenic system ensured a temperature stability with a range of fluctuation below 0.1 K. The thermogravimetric (TG) measurements were performed on a Mettler Toledo TGA/DSC 1 Instrument from room temperature up to 800

• °C with a heating rate of 10 K/min. Samples with an initial mass of around 10 mg were placed into 150 µL Pt crucibles. During the measurement, the furnace was purged with an air flow with a rate of 50 mL·min−1. The baseline was automatically subtracted from the measured TGA curve. Differential

• Information Supporting Information File 62: SEM and TGA and DSC data for the precursor hydrogen titanate nanoribbons sample, XRD patterns, SEM and TEM images, XPS and optical absorbance spectra of selected TiO2 nanoribbon samples, and concentration profiles of isopropanol and acetone during the photocatalytic

Silica micro/nanospheres for theranostics: from bimodal MRI and fluorescent imaging probes to cancer therapy

• Shanka Walia and
• Amitabha Acharya

Beilstein J. Nanotechnol. 2015, 6, 546–558, doi:10.3762/bjnano.6.57

• . The thioglycolic acid (TGA)-coated CdTe QDs were synthesized from CdCl2·5H2O. Finally, the desired nanocomposites were coated with silica in a reverse microemulsion process. To check the biological compatibility of these prepared hybrid nanocomposites, these were covalently conjugated with goat

• Fe3O4 NPs that were incorporated in silica and functionalized with a carboxylic acid group for bioconjugation. The synthesis involved coating silica around citric-acid-coated Fe3O4 NPs by using the Stöber process. The MPS-activated silica-coated Fe3O4 NPs were then conjugated with TGA-modified CdTe NPs

• poly(N-isopropylacrylamide)-coated luminescent/magnetic silica microspheres. The synthesis involved a sequence of three steps in which the first step led to the incorporation of iron oxide magnetic NPs inside silica spheres through the Stöber process. In the next step, negatively charged TGA

Multifunctional layered magnetic composites

• Maria Siglreitmeier,
• Baohu Wu,
• Tina Kollmann,
• Martin Neubauer,
• Gergely Nagy,
• Dietmar Schwahn,
• Vitaliy Pipich,
• Damien Faivre,
• Dirk Zahn,
• Andreas Fery and
• Helmut Cölfen

Beilstein J. Nanotechnol. 2015, 6, 134–148, doi:10.3762/bjnano.6.13

• confirmed by TGA measurements, and that the structure of the demineralized nacre organic matrix has not significantly changed compared with the original nacre. Nacre organic matrix – Light microscopy and fluorescence microscopy Original nacre (Haliotis laevigata) used for materials synthesis was analyzed by

• cycles, which is in agreement with TGA studies of the hybrid materials. The studies show that the particles are in the size range of 10 ± 5 nm and do exist at the chitin surface as well as in between the chitin layers due to the presence of the carrying media gelatin. It is also worth to mention that

• Garching, Germany [62]. Some of the SANS data at large Q range is based on experiments performed at the SANS II, Swiss spallation neutron source SINQ, Paul Scherrer Institute, Villigen, Switzerland. The mineral content of the multifunctional hybrid material was determined by means of TGA (Netzsch, Selb

Synthesis of boron nitride nanotubes and their applications

• Saban Kalay,
• Zehra Yilmaz,
• Ozlem Sen,
• Melis Emanet,
• Emine Kazanc and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2015, 6, 84–102, doi:10.3762/bjnano.6.9

• and it might be worthwhile to further investigate it [71]. BNNT-grafted, poly(glycidyl methacrylate) and polystyrene brushes were prepared via atom transfer radical polymerization [72]. The resulting nanocomposite material was characterized using FTIR, TGA, SEM and TEM. The TEM images clearly show the

Manganese oxide phases and morphologies: A study on calcination temperature and atmospheric dependence

• Matthias Augustin,
• Daniela Fenske,
• Ingo Bardenhagen,
• Anne Westphal,
• Martin Knipper,
• Thorsten Plaggenborg,
• Joanna Kolny-Olesiak and
• Jürgen Parisi

Beilstein J. Nanotechnol. 2015, 6, 47–59, doi:10.3762/bjnano.6.6

• oxidation process of Mn(II) glycolate to the manganese oxide species observed in the XRD patterns (see Figure 3 and Figure 4) was also investigated by thermogravimetric analysis (TGA). TGA measurements were recorded while heating the Mn(II) glycolate samples up to 700 °C with a heating rate of 2 K/min in an

• ligands (tetraethylene glycol and ethylene glycol), whose boiling points are in the temperature range of 150 °C to 320 °C. Subsequently, a mass loss of about 37% is detected up to 450 °C, which was also observed in TGA measurements of Ti(IV) glycolate by Jiang et al. [38] and was explained as a complete

•  3. In the TGA measurement, however, a mass loss of 44% attributed to this process is detected between 150 and 250 °C. Hence, the observed mass loss includes the decomposition of organic species as well as the oxidation to Mn3O4. The temperature delay of the processes can be explained by considering

Carbon nano-onions (multi-layer fullerenes): chemistry and applications

• Juergen Bartelmess and
• Silvia Giordani

Beilstein J. Nanotechnol. 2014, 5, 1980–1998, doi:10.3762/bjnano.5.207

• spectroscopy, SEM/EDX, XRD, XPS, TGA and TEM. In addition, the authors reported that the fluorination of the F-CNOs was reversible upon treatment with hydrazine, which interestingly led also to a regeneration of the “broken” graphene layers of the CNO. Some years later, based on the F-CNO material, the same

• (Figure 3). Characterization was carried out by a multitude of different techniques, such as GPC, TEM, TGA, XPS and Raman spectroscopy. In 2008, Echegoyen et al. reported a first supramolecular CNO/Zn-porphyrin complex [32] (Scheme 5). In this set up, acid-treated CNOs bearing carboxylic acid

• functionalities, which were prepared by the oxidation of CNOs (diameter approx. 6 nm) with conc. HNO3/H2SO4 (3:1, v/v), were reacted with 4-aminopyridine in an amidation reaction. The synthesized water-soluble CNO material was characterized by using TEM, NMR, UV–vis and Raman spectroscopy. Based on TGA studies

Ionic liquid-assisted formation of cellulose/calcium phosphate hybrid materials

• Ahmed Salama,
• Mike Neumann,
• Christina Günter and
• Andreas Taubert

Beilstein J. Nanotechnol. 2014, 5, 1553–1568, doi:10.3762/bjnano.5.167

• especially the intensity of the phosphate vibration bands is fairly low in the samples prepared at higher cellulose concentrations. Figure 10 shows thermogravimetric analysis/differential thermal analysis (TGA/DTA) data. Table 5 summarizes the results from elemental analysis (CHN analysis) and TGA/DTA. TGA

• of the neat cellulose finds a weight loss of 96.1%, indicating that even the neat cellulose contains some fraction of non-volatile components. Overall the TGA curve is consistent with earlier data [65] on cellulose decomposition, where a first weight loss of ca. 4.5% is assigned to water desorption

• . The same general observation can be made from the TGA/DTA data of all hybrid materials, Table 5. The samples exhibit a first weight loss of a few % assigned to water desorption and drying processes, followed by a two-step, thermally induced and exothermic, decomposition of the organic fraction. The

Mimicking exposures to acute and lifetime concentrations of inhaled silver nanoparticles by two different in vitro approaches

• Fabian Herzog,
• Kateryna Loza,
• Sandor Balog,
• Martin J. D. Clift,
• Matthias Epple,
• Peter Gehr,
• Alke Petri-Fink and
• Barbara Rothen-Rutishauser

Beilstein J. Nanotechnol. 2014, 5, 1357–1370, doi:10.3762/bjnano.5.149

• dismutase 1 (SOD1) [GenBank: NM_000454], interleukin-8 (IL8) [GenBank: NM_000584] and tumor necrosis factor alpha (TNFA) [GenBank: NM_000594] were determined. Primer sequences (Microsynth AG, Balgach, Switzerland) were the following: GAPDH: forward 5’- AAC AGC CTC AAG ATC ATC AGC-3’, reverse 5’- GGA TGA TGT

Nanoporous composites prepared by a combination of SBA-15 with Mg–Al mixed oxides. Water vapor sorption properties

• Amaury Pérez-Verdejo,
• Alvaro Sampieri,
• Heriberto Pfeiffer,
• Mayra Ruiz-Reyes,
• Juana-Deisy Santamaría and
• Geolar Fetter

Beilstein J. Nanotechnol. 2014, 5, 1226–1234, doi:10.3762/bjnano.5.136

• samples.a Supporting Information Supporting Information File 154: Additional characterization of materials by XRD, TGA and SEM-TEM analysis. Acknowledgements The financial support of CONACYT (project 180166) is gratefully acknowledged. The authors thank Adriana Tejeda, Omar Novelo and Carlos Flores for

Characterization and photocatalytic study of tantalum oxide nanoparticles prepared by the hydrolysis of tantalum oxo-ethoxide Ta₈(μ₃-O)₂(μ-O)₈(μ-OEt)₆(OEt)₁₄

• Subia Ambreen,
• N D Pandey,
• Peter Mayer and
• Ashutosh Pandey

Beilstein J. Nanotechnol. 2014, 5, 1082–1090, doi:10.3762/bjnano.5.121

• characterized by various techniques such as TGA-DTA-DSC, UV–vis DRS, XRD, SEM, TEM, particle size analyzer (DLS) and the Brunauer–Emmett–Teller (BET) method. The band gap of the particles was calculated by using the Tauc plot. The photocatalytic activity of Ta2O5 nanoparticles was tested by the degradation of

• thermal stability of the as-prepared (dried) photocatalyst with α-Al2O3 as the reference. Figure 6 shows the TG/DTA/DSC curves obtained from the dried gel of Ta2O5. The TGA graph shows a weight loss up to a temperature of 200 °C that is essentially attributed to dehydration. The decomposition of organic

• , fused calcium chloride and aluminum isopropoxide, then it was passed into the distilled water through a tube with a diameter of 7 mm. 1H NMR spectra were recorded in C6D6 on a Bruker Biospin ARX spectrometer with TMS as internal reference. TGA/DTA/DSC was recorded by using a Diamond TG/DTAN instrument

A visible-light-driven composite photocatalyst of TiO₂ nanotube arrays and graphene quantum dots

• Donald K. L. Chan,
• Po Ling Cheung and
• Jimmy C. Yu

Beilstein J. Nanotechnol. 2014, 5, 689–695, doi:10.3762/bjnano.5.81

• ), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and UV–vis absorption spectroscopy. The product exhibited high photocatalytic performance in the photodegradation of methylene blue and enhanced photocurrent under visible

• ). Thermogravimetric analysis was performed in air using a thermogravimetric analyzer (Perkin Elmer, TGA 6). The samples were heated from 50 °C to 800 °C at a rate of 10 °C·min−1. Photocatalytic activity measurements: The photocatalytic activities of catalysts were evaluated by measuring the photodegradation of

• light irradiation. Photocurrent responses of (a) TNAs and (b) GQDs/TNAs under visible-light irradiation. The potential bias was 0.417 V. Reaction scheme for the loading of GQDs onto TNAs via covalent bonding. Supporting Information Supporting information features FTIR spectra, TGA profiles of the

Artificial sunlight and ultraviolet light induced photo-epoxidation of propylene over V-Ti/MCM-41 photocatalyst

• Van-Huy Nguyen,
• Shawn D. Lin,
• Jeffrey Chi-Sheng Wu and
• Hsunling Bai

Beilstein J. Nanotechnol. 2014, 5, 566–576, doi:10.3762/bjnano.5.67

• condensation of AA molecules may lead to larger and heavier species such as hexa-2,4-dienal and 3-methylpentanedial [40]. The TGA weight loss curves of the spent and the fresh V-Ti/MCM-41 are compared in Figure 10. The weight loss below 400 K is attributed to the removal of adsorbed water while that above 400

• performed with a JEOL JEM-2100 instrument operating at 200 kV. Thermal gravimetric analysis (TGA, PYRIS Diamond TG-DTA, high temperature 115V) was carried out in the range of 300–773 K. About 30 mg samples were placed in an alumina sample holder and heated under air (20 mL·min−1) with a heating rate of 3

• arc lamp and (b) a xenon lamp (see Table 2). Lines are presented for guiding and are not based on a kinetic model. The TGA weight loss curves V-Ti/MCM-41 photocatalyst using O2 as the sweep gas: (a) fresh catalyst and (b) catalyst deactivated by the photo-epoxidation of propylene. Overview of the

Chemi- vs physisorption in the radical functionalization of single-walled carbon nanotubes under microwaves

• Victor Mamane,
• Guillaume Mercier,
• Junidah Abdul Shukor,
• Jérôme Gleize,
• Aziz Azizan,
• Yves Fort and
• Brigitte Vigolo

Beilstein J. Nanotechnol. 2014, 5, 537–545, doi:10.3762/bjnano.5.63

• microwave-assisted diazonium chemistry [31][32], chlorophenyl groups were grafted at the CNT surface and the functionalization level was followed by thermogravimetric analysis coupled with mass spectrometry (TGA–MS) (Scheme 1). The present work highlights the importance of controlling the reaction times

• min, 10 min and 15 min (Scheme 1). After treatment, the obtained functionalized samples (f-SWNT-5min, f-SWNT-10min and f-SWNT-15min) were analyzed by dispersion tests, high resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and TGA–MS. Figure 1 shows photographs of the

• a weight loss of 10.1 and 10.7 wt % centered at 380 and 360 °C as the reaction time is increased from 5 to 10 min. The difference between the two samples is a marginal loss (about 1.0 wt %) between 100 and 200 °C only visible for f-SWNT-10min. The TGA profile of f-SWNT-15min is different from the

One-step synthesis of high quality kesterite Cu₂ZnSnS₄ nanocrystals – a hydrothermal approach

• Vincent Tiing Tiong,
• John Bell and
• Hongxia Wang

Beilstein J. Nanotechnol. 2014, 5, 438–446, doi:10.3762/bjnano.5.51

• synthesis of pure kesterite-phase Cu2ZnSnS4 (CZTS) nanocrystals with a uniform size distribution by a one-step, thioglycolic acid (TGA)-assisted hydrothermal route. The formation mechanism and the role of TGA in the formation of CZTS compound were thoroughly studied. It has been found that TGA interacted

• procedure. Through thoroughly investigating the factors that influence the morphology, crystal size, and growth of CZTS nanocrystals, a mechanism that depicts the formation process of CZTS compound is proposed. It is found that the tiny amount of thioglycolic acid (TGA) used in the precursor is crucial for

• the formation of pure kesterite CZTS nanocrystals. The roles of TGA in the hydrothermal synthesis are discussed. Experimental Materials: All the materials were provided by Sigma Aldrich unless otherwise stated. Chemicals of copper(II) chloride dehydrate (CuCl2·2H2O), zinc chloride (ZnCl2) product of

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

• (above 440 K). Experimental Thermogravimetry (TGA) measurements were performed by means of a Setaram Setsys Evolution 1200 apparatus, equipped with a mass spectrometer Pfeiffer Vacuum Quadstar QMS200. To identify all possible gaseous products, survey scans in the mass range between 1 and 100 amu were

• recorded. The TGA measurements were performed by heating in vacuum (approx. 10−4 mbar) at 0.5 K/min. Infrared spectra were collected by means of an Agilent Cary 660 spectrometer with a resolution of 1 cm−1 in the frequency range between 430 and 1100 cm−1. The spectra were the mean of at least 100 scans for

• solution, deposited onto Si and Cu substrates, and dried in vacuum before analysis. Results and Discussion TGA measurements were performed both on the as-produced nanowire sample (sample 1) and on a nanowire specimen heated in vacuum (p < 10−4 mbar) for 24 h at 350 K (sample 2), in order to clean the

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

• the growth rate of nanotube arrays. The linear fit function passes through the point of origin, which suggests a short time of nucleation. Thermal stability. Thermogravimetric analysis (TGA) showed that all N-CNTs (for the sake of clarity, only Synthesis V and VII are presented here) were less

• = 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

• : top – ‘bamboo’-like (Synthesis VII) and bottom – ‘membrane’-like (Synthesis VIII); and (B) graphical representations thereof. The height of the N-CNTs array vs time of growth. Overlaid TGA curves recorded in air for N-CNTs (Synthesis V and VII) and MWCNTs (Ref. Synthesis). FT-IR spectra of CNTs and N

Controlled synthesis and tunable properties of ultrathin silica nanotubes through spontaneous polycondensation on polyamine fibrils

• Jian-Jun Yuan,
• Pei-Xin Zhu,
• Daisuke Noda and
• Ren-Hua Jin

Beilstein J. Nanotechnol. 2013, 4, 793–804, doi:10.3762/bjnano.4.90

• inner hollow that would be in favor of generating geometrically stable photoactive sites, and the other one is the existence of trace carbon in the silica nanotubes (less than 0.9 wt % estimated by TGA) which would be doped into the silica frame to compose the photoactive sites. Probably, these two

• stirring for 1 h at room temperature. Phosphorescence emission spectra (λEx = 320 nm) of silica nanotubes and nanoribbons that were synthesized by calcining the corresponding LPEI@silica hybrid nanotubes (Figure 1A–C) and nanoribbons (Figure 1D–F) under N2 atmosphere at 1000 °C. TGA (A) and Raman spectra

• formed by the alkali-induced self-assembly of LPEI. Summary of the molar ratios of [OH]/[EI] for the synthesis of the LPEI templates, the TGA analysis of the composition of LPEI@silica hybrid nanostructures and BET data of the silica nanostructures obtained by calcination of LPEI@silica hybrid at 800 °C