Abrupt elastic-to-plastic transition in pentagonal nanowires under bending

• Sergei Vlassov,
• Magnus Mets,
• Boris Polyakov,
• Jianjun Bian,
• Leonid Dorogin and
• Vahur Zadin

Beilstein J. Nanotechnol. 2019, 10, 2468–2476, doi:10.3762/bjnano.10.237

• -fold twinned structure prevents propagation of critical defects, leading to dislocation pile up that may lead to sudden stress release, which is observed as an abrupt plastic event. Moreover, we found that if the NWs are coated with alumina, the abrupt plastic event is not observed and the NWs can

• demonstrate an unusual, abrupt elastic-to-plastic transition, observed as a sudden change of the NW profile from smooth arc-shaped to angled knee-like during the bending in the narrow range of bending angles (critical bending angle). Moreover, we show that if the NWs are coated with alumina, an abrupt plastic

• extreme surface-to-volume ratio. If surface nucleation is mitigated by, for example, external materials (coating), the onset of plastic yield can be significantly postponed. Hence, we performed a few preliminary tests on Ag NWs coated by atomic layer deposition (ALD) with a few-nm thick layer of alumina

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

• ) and Fe2O3 (0.166 g) [25]. Briefly, the precursor mixture was transferred to an alumina boat and preheated at 180 °C for 15 min and then the alumina boat was placed into the center of the tubular furnace (Protherm, Furnaces PTF 14/50/450). The BNNT synthesis was performed under saturated NH3 atmosphere

• . The furnace temperature was set to a heating rate of 8 °C/min up to 1280 °C and then held at this temperature for 3 h. The furnace was cooled down to ambient temperature. Thereafter, the BNNTs were collected from the top of the alumina boat and stored in a dry environment. For the purification, the

Multiwalled carbon nanotube based aromatic volatile organic compound sensor: sensitivity enhancement through 1-hexadecanethiol functionalisation

• Nadra Bohli,
• Meryem Belkilani,
• Juan Casanova-Chafer,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2019, 10, 2364–2373, doi:10.3762/bjnano.10.227

• presented in Supporting Information File 1 [16][17][18]. The MWCNTs were then dispersed in dimethylformamide (DMF) (0.1 mg MWCNTs in 1 mL of DMF) using an ultrasonic bath for 20 minutes at room temperature. Then, they were air-brush deposited over the platinum interdigitated electrode area of alumina

Mannosylated brush copolymers based on poly(ethylene glycol) and poly(ε-caprolactone) as multivalent lectin-binding nanomaterials

• Stefania Ordanini,
• Wanda Celentano,
• Anna Bernardi and
• Francesco Cellesi

Beilstein J. Nanotechnol. 2019, 10, 2192–2206, doi:10.3762/bjnano.10.212

• alumina pad to remove the copper catalyst, followed by precipitation in diethyl ether. Synthesis of the mannosylated polymers The sugar functionalization of the polymeric backbone was performed through CuAAC click reaction (Scheme 1, step d), by combining the triple bonds with 2-azidoethyl α-ᴅ

• performed by filtering the reaction mixture through a neutral alumina pad (h = 1.5 cm/mcrude (g), Φ = 2 cm), washing with CH2Cl2. Then the filtrate was dried under reduced pressure and the resulting crude was dissolved in the minimum amount of CH2Cl2 (ca. 1 mg/mL) and dripped in cold diethyl ether (CH2Cl2

• , pentaerythritol tetrakis(2-bromo-isobutyrate, 2) 80 mg/mL in THF) were added to the monomers. The reaction mixture was stirred for 6 h at 50 °C under nitrogen atmosphere. The purification was performed by filtering the reaction mixture through a neutral alumina pad (h = 1.5 cm/mcrude (g), Φ = 2 cm), washing with

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

• Carol López de Dicastillo,
• Cristian Patiño,
• María José Galotto,
• Yesseny Vásquez-Martínez,
• Claudia Torrent,
• Daniela Alburquenque,
• Alejandro Pereira and
• Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

• this work, novel, hollow, calcined titanium dioxide nanospheres (CSTiO2) were successfully synthesized for the first time through the combination of electrospinning and atomic layer deposition techniques. Poly(vinylpyrrolidone) (PVP) electrosprayed spherical particles were double-coated with alumina

• (alumina) was necessary with the role of fixing the SPVP particles to avoid their detachment during the TiO2 ALD step. Finally, the calcination process, carried out at 600 °C under an air atmosphere, was applied to remove the PVP polymer from the structures, resulting in hollow titanium dioxide nanospheres

• , alumina coated and alumina–titania double-coated particles. The alumina deposition maintained the initial white color of the collected electrosprayed spheres, while the TiO2 deposition acquired a dark bluish color. This change may be related to the number of deposition cycles that produced an optical

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

• alumina micro-hotplates provided with vapor-deposited Pt contacts (0.3 × 0.2 mm2) separated by a 0.2 mm gap and with embedded Pt-meanders. The paste was dried at room temperature in ambient air and then calcined at 250 °C in purified air for 20 h to remove the binder. The thick sensing layer was about 1

Growth of lithium hydride thin films from solutions: Towards solution atomic layer deposition of lithiated films

• Ivan Kundrata,
• Karol Fröhlich,
• Lubomír Vančo,
• Matej Mičušík and
• Julien Bachmann

Beilstein J. Nanotechnol. 2019, 10, 1443–1451, doi:10.3762/bjnano.10.142

• , especially when combined with substrates of high surface area, which allow for increased capacity values. One such example is the V2O5–SnO2 nanobattery [6] grown on anodized alumina. ALD can also deposit lithiated films, using precursors such as Li(thd), lithium tert-butoxide, and lithium

Gas sensing properties of individual SnO₂ nanowires and SnO₂ sol–gel nanocomposites

• Alexey V. Shaposhnik,
• Dmitry A. Shaposhnik,
• Sergey Yu. Turishchev,
• Olga A. Chuvenkova,
• Stanislav V. Ryabtsev,
• Alexey A. Vasiliev,
• Xavier Vilanova,
• Francisco Hernandez-Ramirez and
• Joan R. Morante

Beilstein J. Nanotechnol. 2019, 10, 1380–1390, doi:10.3762/bjnano.10.136

• mass flow controllers. Manufacture of the device based on sol–gel material Tin dioxide nanopowder was mixed with ethylene glycol to obtain a paste which was deposited on a thin alumina substrate with predeposited platinum electrodes using a dispenser. The thickness of the sensing layer was of 10–12 μm

Alloyed Pt₃M (M = Co, Ni) nanoparticles supported on S- and N-doped carbon nanotubes for the oxygen reduction reaction

• Stéphane Louisia,
• Yohann R. J. Thomas,
• Pierre Lecante,
• Marie Heitzmann,
• M. Rosa Axet,
• Pierre-André Jacques and
• Philippe Serp

Beilstein J. Nanotechnol. 2019, 10, 1251–1269, doi:10.3762/bjnano.10.125

• of 37%. The electrode is polished with 1 µm diamond paste and 0.05 µm alumina paste before use. The RRDE electrodes were prepared from a suspension of PtCo/CNT catalyst in 4 mL of isopropanol/DI water/Nafion® dispersion (type D-2020 from Dupont Fluoroproduct, 20% Nafion® dissolved in aliphatic

Luminescence of Tb₃Al₅O₁₂ phosphors co-doped with Ce³⁺/Gd³⁺ for white light-emitting diodes

• Yu-Guo Yang,
• Lei Wei,
• Jian-Hua Xu,
• Hua-Jian Yu,
• Yan-Yan Hu,
• Hua-Di Zhang,
• Xu-Ping Wang,
• Bing Liu,
• Cong Zhang and
• Qing-Gang Li

Beilstein J. Nanotechnol. 2019, 10, 1237–1242, doi:10.3762/bjnano.10.123

• was calcined at 1350 °C for 5 h in an alumina crucible. Finally, the product was collected and reground after the temperature decreased to room temperature. The X-ray diffraction (XRD) measurements were performed on a Rigaku D/max-RA X-ray diffractometer using Cu Kα radiation (λ = 1.5406 Å) with the

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• sepiolite, are characterized by a large specific surface area and microporosity, as well as the presence of external silanol groups, which can immobilize species including NPs of diverse nature [11][72]. Halloysite (Figure 1D) is a layered aluminosilicate with a silica/alumina composition similar to that of

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

• Jeff L. Nyalosaso,
• Rachod Boonsin,
• Pierre Vialat,
• Damien Boyer,
• Geneviève Chadeyron,
• Rachid Mahiou and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 760–770, doi:10.3762/bjnano.10.75

• . The measurements were performed with ca. 15 mg of the sample in an alumina crucible. Quantum yields (QY) were measured using a C9920-02G PL-QY measurement system from Hamamatsu. The setup consisted of a 150 W monochromatized Xe lamp, an integrating sphere (Spectralon coating, φ = 3.3 inch) and a high

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

• . In the literature, (ultra-)thin porous alumina [7][25][26][27][28][29] and titania [12][30][31][32][33] are the most widely studied systems obtained from MLD metal alkoxides, and recently, vanadium-based materials were also investigated [18][34]. The porous thin films were applied as functional

• oxidation state of carbon functionalities could lead to a more controlled removal of the organic fraction and, in turn, void formation. Van de Kerckhove et al. [29] recently demonstrated that the heating rate in the calcination of MLD alucone to form porous alumina has a significant impact on the final open

Ultrathin hydrophobic films based on the metal organic framework UiO-66-COOH(Zr)

• Miguel A. Andrés,
• Clemence Sicard,
• Christian Serre,
• Olivier Roubeau and
• Ignacio Gascón

Beilstein J. Nanotechnol. 2019, 10, 654–665, doi:10.3762/bjnano.10.65

• important characteristic in many practical applications. Aguado et al. [37] obtained hydrophobic SIM-2 by post-synthetic functionalization of SIM-1 films deposited onto anodic alumina disks (MOF layer thickness ≈20 µm). Grzybowski et al. [45] obtained freestanding, porphyrin-based MOF films approximately

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

• % purity). Then, the suspension was placed in an ultrasonic bath during 30 min at room temperature. Thereafter, the suspension was deposited onto screen-printed alumina substrates by employing an airbrushing technique. Finally, the MWCNTs were decorated with gold nanoparticles by a sputtering method. An

• solutions. Then, sensors consisting of mats of Au-decorated MWCNTs on alumina substrates were immersed in these solutions and kept at 4 °C during 24 h in order to ensure the correct formation of SAMs. Finally, the sensors were rinsed three times with ethanol and dried under a N2 flow to remove unbound

• were taken at 80 kV. Fabrication of the sensor substrate A 10 × 10 mm2 alumina substrate was employed. Interdigitated electrodes and a heating resistor were screen-printed on either side of the substrate employing a platinum ink (see Supporting Information File 1, Figure S6). The electrode area was

Direct observation of the CVD growth of monolayer MoS₂ using in situ optical spectroscopy

• Claudia Beatriz López-Posadas,
• Yaxu Wei,
• Wanfu Shen,
• Daniel Kahr,
• Michael Hohage and
• Lidong Sun

Beilstein J. Nanotechnol. 2019, 10, 557–564, doi:10.3762/bjnano.10.57

• required for the CVD, the substrates were positioned at the center of the furnace, while the alumina boats containing solid sulfur and MoO3 were located 15 cm and 3 cm, respectively, away from the entrance of the furnace upstream of the Ar flow. From the configuration exhibited in Figure 3a, it can be

• recognized that the sulfur is predominantly heated by the heating belt, whereas the MoO3 powder was heated not only by the heating belt but also by the heater in the furnace in a radiative manner. In order to avoid the early mixing and reaction between MoO3 and sulfur, the alumina boat of MoO3 was enclosed

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

• (6.0 g) was placed in an alumina crucible and was calcined at 550 °C for 2 h at a rate of 5 °C/min under air. The as-prepared bulk g-C3N4 was further exfoliated by thermal oxidation at 500 °C for 2 h at a rate of 5 °C/min to obtain g-C3N4 nanosheets. The obtained 2D g-C3N4 nanosheets were then

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

• other pure materials such as SiO2, polyimide, polyethylene, alumina (Al2O3), benzocyclobutenes (BCB) and SiO2/poly(methyl methacrylate) (PMMA), nanocomposite parylene C (NCPC) exhibits some interesting properties [39][40][41][42][43][44][45][46][47]. As an example, parylene C/Silica nanocomposites show

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

• applications [19]. Such biocompatible surfaces have not been widely adapted within use of ALD, although recent attempts have been reported for deposition of biocompatible hydroxyapatite thin films [20] and hydrophilic ALD-deposited alumina thin films [21], in addition to our prior work on titaminates [22], and

Thermal control of the defunctionalization of supported Au₂₅(glutathione)₁₈ catalysts for benzyl alcohol oxidation

• Zahraa Shahin,
• Hyewon Ji,
• Rodica Chiriac,
• Nadine Essayem,
• Franck Rataboul and
• Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

• STARE system from Mettler Toledo Thermobalance MX1. Around 2 mg of sample was heated from 25 °C to 800 °C at a rate of 10 °C/min in a 70 µL alumina crucible, under air. For isothermal TGA, the samples were heated at a rate of 2 °C/min from 25 °C to the final targeted temperature (200 °C, 300 °C, and 400

• °C) in a 70 µL alumina crucible, under air. The final temperature was maintained for 12 hours. Transmission electron microscopy (TEM) was carried out on a JEOL 2010 LaB6 microscope operating at 200 kV. The samples were prepared on a copper grid for analysis. The measurement of the diameter of the

Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability

• Sandra Haschke,
• Dmitrii Pankin,
• Vladimir Mikhailovskii,
• Maïssa K. S. Barr,
• Adriana Both-Engel,
• Alina Manshina and
• Julien Bachmann

Beilstein J. Nanotechnol. 2019, 10, 157–167, doi:10.3762/bjnano.10.15

• composite onto a novel nanoporous electrode surface with low noble metal loading and improved stability. The Ru/C is coated on the pore walls of anodic alumina templates in a one-step laser-induced deposition method from Ru3(CO)12 solutions. Scanning electron microscopy proves the presence of a continuous

• successful deposition method to the functionalization of highly ordered nanostructured anodic alumina templates [35][36][37][38][39] (Note: as our system is based on pores of diameter >50 nm, it is macroporous according to the IUPAC definition; we will use the more general wording “nanoporous” and

• procedure and renders it widely available. Laser-induced deposition on nanoporous substrates This successful Ru/C laser deposition can now be transferred to anodic alumina templates featuring ordered arrays of parallel and cylindrical nanopores. The full preparation procedure is delineated in Figure 5. In

pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

• Emilie Molina,
• Mélody Mathonnat,
• Jason Richard,
• Patrick Lacroix-Desmazes,
• Martin In,
• Philippe Dieudonné,
• Thomas Cacciaguerra,
• Corine Gérardin and
• Nathalie Marcotte

Beilstein J. Nanotechnol. 2019, 10, 144–156, doi:10.3762/bjnano.10.14

• , DOWEX MSC-H resin, neutral alumina 50–200 µm) were purchased from Sigma-Aldrich and purified when necessary (α-methoxy-ω-hydroxy-poly(ethylene oxide), tert-butyl acrylate, toluene, THF, acetone); the solvents were dried and distilled by routine procedures. Oligochitosan lactate (OC, M < 5000 g·mol−1

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

• effective, the preparation of these materials still often involves metakaolinization, dealumination, ageing, and autoclave heating for several days [15][16]. In some cases, silica, alumina, and structure-directing agents have to be added to the metakaolin to tune the properties of the resulting materials

Wet chemistry route for the decoration of carbon nanotubes with iron oxide nanoparticles for gas sensing

• Hussam M. Elnabawy,
• Juan Casanova-Chafer,
• Badawi Anis,
• Mostafa Fedawy,
• Mattia Scardamaglia,
• Carla Bittencourt,
• Ahmed S. G. Khalil,
• Eduard Llobet and
• Xavier Vilanova

Beilstein J. Nanotechnol. 2019, 10, 105–118, doi:10.3762/bjnano.10.10

• for testing can be seen in the Supporting Information File 2 (Figure S2). The silicon substrates onto which carbon nanotubes were deposited were glued to an alumina substrate that included a platinum heater employing a thermally conductive epoxy. A teflon chamber, which allowed allocating up to four

Graphene–graphite hybrid epoxy composites with controllable workability for thermal management

• Idan Levy,
• Eyal Merary Wormser,
• Maxim Varenik,
• Matat Buzaglo,
• Roey Nadiv and
• Oren Regev

Beilstein J. Nanotechnol. 2019, 10, 95–104, doi:10.3762/bjnano.10.9

• subsequently cured for 20 h at 80 °C. Thermal conductivity (TC) The TC of the matrix (TCmatrix) and of the composites (TCcomposite) was measured by differential scanning calorimetry (DSC, Mettler Toledo Star system operated under a N2 flow of 80 mL/min and equipped with 70 μL alumina crucibles) [24][25]. The