Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

• Andreea Costas,
• Camelia Florica,
• Elena Matei,
• Maria Eugenia Toimil-Molares,
• Ionel Stavarache,
• Andrei Kuncser,
• Victor Kuncser and
• Ionut Enculescu

Beilstein J. Nanotechnol. 2018, 9, 2345–2355, doi:10.3762/bjnano.9.219

• . The templates used were nanoporous polycarbonate membranes with a thickness of 30 µm, a density of 109 pores·cm−1 and a pore diameter of 130 nm. Chemical etching of the pores was performed by immersing the irradiated polycarbonate foils in an aqueous solution of 5 M NaOH and 10 vol % methanol at a

Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes

• Evgenia Kontoleta,
• Sven H. C. Askes,
• Lai-Hung Lai and
• Erik C. Garnett

Beilstein J. Nanotechnol. 2018, 9, 2097–2105, doi:10.3762/bjnano.9.198

• the electrolyte, which was illuminated through a quartz window. The electrolyte consisted of an aqueous solution of chloroplatinic acid (4 mM) and Na2SO4 (0.1 M), with the pH value adjusted to 11 with 2 M NaOH. The back contact of the sample consisted of 4 nm of chromium and 50 nm of gold deposited

• a silicon nanocone after photo-electrodeposition of platinum. b) Current as a function of the time during a photo-electrodeposition experiment of silicon nanocones excited at 532 nm (laser on), at −0.8 V applied potential in an aqueous solution of H2PtCl6 (pH 11). c) X-ray photoemission spectrum of

The structural and chemical basis of temporary adhesion in the sea star Asterina gibbosa

• Birgit Lengerer,
• Marie Bonneel,
• Mathilde Lefevre,
• Elise Hennebert,
• Philippe Leclère,
• Emmanuel Gosselin,
• Peter Ladurner and
• Patrick Flammang

Beilstein J. Nanotechnol. 2018, 9, 2071–2086, doi:10.3762/bjnano.9.196

• solution of methylene blue in 1% sodium tetraborate and 1% aqueous solution of azur II. Ultrathin sections (80 nm) were cut with a Leica Ultracut UCT ultramicrotome equipped with a diamond knife. They were contrasted with uranyl acetate and lead citrate and observed with a Zeiss LEO 906E transmission

• were dehydrated in graded ethanol and embedded in Spurr resin. Semi-thin sections (1 µm) were performed with a Reichert Om U2 ultramicrotome equipped with a glass knife. The tube feet were sectioned either longitudinally or transversally. The sections were then stained with a 1:1 mixture of 1% aqueous

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

• a non-toxic amphiphilic calixresorcinarene capable to form nanoconjugates for drug encapsulation, tetraundecylcalixresorcinarene functionalized by methoxy poly(ethylene glycol) chains has been synthesized. The macrocycle obtained is characterized by low hemotoxicity. In aqueous solution it forms

• calixarene and calixresorcinarene polylactide star polymers [19]. Self-association and hemotoxicity of 3 First, the self-association of macrocycle 3 in the aqueous solution was studied by using small-angle X-ray scattering (SAXS). The obtained data are typical for core–shell particles that practically do not

• interact with each other (Figure S5, Supporting Information File 1). Figure 2a presents the resulting scattering curve of the aqueous solution of 3 after the subtraction of water scattering. The character of scattering corresponds to a monodisperse particle system. Power-law slopes from the data in the

Fabrication of photothermally active poly(vinyl alcohol) films with gold nanostars for antibacterial applications

• Mykola Borzenkov,
• Maria Moros,
• Claudia Tortiglione,
• Serena Bertoldi,
• Nicola Contessi,
• Silvia Faré,
• Angelo Taglietti,
• Agnese D’Agostino,
• Piersandro Pallavicini,
• Maddalena Collini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2018, 9, 2040–2048, doi:10.3762/bjnano.9.193

• decoration) have received particular attention [6][7]. Previously, it was shown that these GNSs are highly photothermally active under NIR irradiation in aqueous solution in the form of monolayers grafted on dry glass surfaces and when inkjet-printed on flexible substrates, demonstrating the ability to reach

• received. Gold nanostar synthesis As follows from [24][29], all glassware used for synthesis and further coating was pretreated with aqua regia before use. 5 mL of HAuCl4 5 × 10−4 M in water were added to 5 mL of an aqueous solution of TritonX-100. Then, 0.6 mL of a previously ice-cooled solution of NaBH4

• order to 5 mL of an aqueous solution of Triton X-100 (0.2 M). Then, a 140–400 µL of an aqueous solution of ascorbic acid (0.0788 M) were added. The solution, after gentle mixing, became colorless. Soon after, 12 µL of the seed solution were added. The samples were allowed to equilibrate for 1 h at room

Recent highlights in nanoscale and mesoscale friction

• Andrea Vanossi,
• Dirk Dietzel,
• Andre Schirmeisen,
• Ernst Meyer,
• Rémy Pawlak,
• Thilo Glatzel,
• Marcin Kisiel,
• Shigeki Kawai and
• Nicola Manini

Beilstein J. Nanotechnol. 2018, 9, 1995–2014, doi:10.3762/bjnano.9.190

• probing what each mobile particle in the sliding layer is doing instant after instant at the interface. In short, charged polystyrene spheres in aqueous solution repel each other, forming, under confinement, a 2D hexagonal crystal [158][159][160][161][162][163]. This crystal is driven across an either

Self-assembled quasi-hexagonal arrays of gold nanoparticles with small gaps for surface-enhanced Raman spectroscopy

• Emre Gürdal,
• Simon Dickreuter,
• Fatima Noureddine,
• Pascal Bieschke,
• Dieter P. Kern and
• Monika Fleischer

Beilstein J. Nanotechnol. 2018, 9, 1977–1985, doi:10.3762/bjnano.9.188

• glass slide was placed on top of the substrate after a drop of about 10 µL of water was applied. The assembly was then exposed for 4 min to deep UV light (254 nm, 85 W). After this step, the substrate was placed in an aqueous solution of enthanolamine (2 mM, Sigma-Aldrich) and potassium gold(III

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

• /diatomite is a pH-independent catalyst possessing a wide functional pH range for the activation of PMS. This phenomenon can be explained by the stability of PMS under different pH conditions in aqueous solution [37]. The influence of the reaction temperature on the degradation efficiency of the MnO2/Fe3O4

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

• morphology and specific surface area of the as-prepared NPLs can be tailored by adjusting the initial dopamine concentration and carbonization temperature. The mesoporous NPLs exhibit excellent sorption of rhodamine B (RhB) dye and fast magnetic separation in aqueous solution. Over 95% of RhB can be adsorbed

Controllable one-pot synthesis of uniform colloidal TiO₂ particles in a mixed solvent solution for photocatalysis

• Jong Tae Moon,
• Seung Ki Lee and
• Ji Bong Joo

Beilstein J. Nanotechnol. 2018, 9, 1715–1727, doi:10.3762/bjnano.9.163

• experiment, the calcined sample (30 mg) was treated with an aqueous NaOH solution (10 mL, 2 M) to improve dispersity in aqueous solution. Characterization: The particle morphology and dispersity were observed using transmission electron microscopy (TEM, JEM-2100, JEOL). The crystalline phases of the samples

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

• were introduced at the upper rim of the macrocycle using the procedure described previously [39]. The microemulsion method was applied to obtain p(SRA-B). Mixing an aqueous solution of SRA (2.5 mM), phenylboronic acid (BA, 5 mM) with styrene (0.5–3 vol %) and potassium carbonate (pH 10.2) results in

• , p(SRA-B) is decomposed at pH 3 and 44–47% of the dye molecules are released from the cavity into the solution. The dissociation of the capsule can also occur after the addition influence of glucose. When glucose is added to the aqueous solution of Fl@p(SRA-B), a slight increase in the fluorescence

• ) was added to 2 mL of an aqueous solution containing SRA (2.5 mM), BA (5 mM) and K2CO3 (0.3 mM) with pH 10.2. The mixture was bubbled with argon for 30 min then sonicated in argon atmosphere for 30 min and finally again bubbled with argon for 30 min. The reaction mixture was heated at 100 °C for 12 h

Sheet-on-belt branched TiO₂(B)/rGO powders with enhanced photocatalytic activity

• Huan Xing,
• Wei Wen and
• Jin-Ming Wu

Beilstein J. Nanotechnol. 2018, 9, 1550–1557, doi:10.3762/bjnano.9.146

• al. [32]. In brief, 1.25 g of TiOSO4, 1.75 g of C2H5NO2 and 0.6 mL of HNO3 (65%) were dissolved in 10 mL deionized water, which was placed in a 400 °C muffle furnace for 15 min to obtain a black powder. 0.5 g of the as-synthesized black powder was immersed in 50 mL of 30 wt % H2O2 aqueous solution

• ' method according to our previous report [31]. To synthesize the TiO2(B)/rGO nanobelt (designated as TGN), 3 mL of GO suspension with a concentration of 2 mg/mL was added to 30 mL of 10 M NaOH aqueous solution, together with 0.2 g commercial Degussa P25 TiO2 nanoparticles. The reactant was then

• excitation wavelength of 360 nm. Photocatalytic activity The photocatalytic activity of the TGN and branched TGN powders were evaluated by photodegradation of phenol in water under UV light illumination. In a typical procedure, 25 mg of the photocatalyst was added to 50 mL of 10 ppm phenol aqueous solution

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

• Rashmi Acharya,
• Brundabana Naik and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

• aggregation and agglomeration of particles. On increasing ZnO content in the ZnO/TiO2 composite, the rate of reduction of Cr(VI) was increased and the sample containing 2.0 mol % ZnO exhibited a maximum photocatalytic reduction of Cr(VI) in aqueous solution as the recombination of charge carriers is

Preparation and morphology-dependent wettability of porous alumina membranes

• Dmitry L. Shimanovich,
• Alla I. Vorobjova,
• Daria I. Tishkevich,
• Alex V. Trukhanov,
• Maxim V. Zdorovets and
• Artem L. Kozlovskiy

Beilstein J. Nanotechnol. 2018, 9, 1423–1436, doi:10.3762/bjnano.9.135

• solution of oxalic acid (0.3 M H2C2O4) at 15 °C, 50 V; type II – in an aqueous solution of oxalic acid (0.3 M H2C2O4) at 15 °C, 40 V (as previously described in detail [31]); type III – in an aqueous solution of sulfuric acid (1.5 M H2SO4) at 15 °C, 20 V. Before anodization, a technological frame was

• obtained. Five samples were prepared in total. For samples 1, 2, and 3 the etching of the barrier layer was carried out by immersing the entire membrane in a 4% aqueous solution of phosphoric acid (H3PO4) at 35 ± 2 °C for 15, 20 and 35 minutes, respectively. For the as-produced samples of type I and type

• it is possible to develop a template that is suitable for various membrane technologies. Experimental In this study, various membranes were fabricated based on porous anodic alumina, prepared via a two-step anodization of Al foil using three distinct sets of conditions: type I – in an aqueous

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

• , Gyeonggido, 10326, Republic of Korea Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia 10.3762/bjnano.9.134 Abstract We developed a colorimetric method for the rapid detection of copper ions (Cu2+) in aqueous solution. The detection of Cu2

Nanoporous silicon nitride-based membranes of controlled pore size, shape and areal density: Fabrication as well as electrophoretic and molecular filtering characterization

• Axel Seidenstücker,
• Stefan Beirle,
• Fabian Enderle,
• Paul Ziemann,
• Othmar Marti and
• Alfred Plettl

Beilstein J. Nanotechnol. 2018, 9, 1390–1398, doi:10.3762/bjnano.9.131

• presented measurements of membranes with millions of pores. Permselectivity studies by fluorescence microscopy The main potential of nanoporous membranes will be the sieving of macromolecules in aqueous solution, especially for medical and biological use and even on an industrial scale [15][42][43

Ag₂WO₄ nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants

• Shijie Li,
• Shiwei Hu,
• Wei Jiang,
• Yanping Liu,
• Yu Liu,
• Yingtang Zhou,
• Liuye Mo and
• Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 1308–1316, doi:10.3762/bjnano.9.123

• Sinopharm Chemical Reagent Ltd. and used as received. Ag2WO4 nanorods were prepared according to a previous report [41]. Briefly, AgNO3 (0.01 mol L−1, 100 mL) and Na2WO4 (0.005 mol L−1, 100 mL) aqueous solutions were first prepared. Then, the AgNO3 aqueous solution was slowly poured into Na2WO4 aqueous

• solution and incubated at room temperature for 12 h in the dark. Finally, the white precipitate was collected, washed successively with distilled water, and dried in vacuum at 60 °C for 12 h. The AgI/Ag2WO4 nanorods were prepared by an in situ anion-exchange reaction of Ag2WO4 nanorods in KI aqueous

• during the reaction. In each experiment, 10 mg of catalyst was dispersed in RhB (100 mL, 10 mg L–1), MO (100 mL, 5 mg L–1) or 4-CP (100 mL, 5 mg L–1) aqueous solution. Before light illumination, the suspensions were first magnetically stirred in the dark for 1 hour. Then 2 mL of the suspension was

Surface characterization of nanoparticles using near-field light scattering

• Eunsoo Yoo,
• Yizhong Liu,
• Chukwuazam A. Nwasike,
• Sebastian R. Freeman,
• Brian C. DiPaolo,
• Bernardo Cordovez and
• Amber L. Doiron

Beilstein J. Nanotechnol. 2018, 9, 1228–1238, doi:10.3762/bjnano.9.114

• PEG-SPIOs in aqueous solution. The laser pushes the trapped nanoparticles across the waveguide via scattering force (pushing force). The frames above capture the movement of trapped nanoparticles over different time points. (A) Intensity and velocity distributions of PEG-SPIOs (n = 47) and IPC-SPIOs n

Electrodeposition of reduced graphene oxide with chitosan based on the coordination deposition method

• Mingyang Liu,
• Yanjun Chen,
• Chaoran Qin,
• Zheng Zhang,
• Shuai Ma,
• Xiuru Cai,
• Xueqian Li and
• Yifeng Wang

Beilstein J. Nanotechnol. 2018, 9, 1200–1210, doi:10.3762/bjnano.9.111

• of modified rGO HACC-rGO was prepared using a previously reported method [29]. Briefly, 100 mg of GO was dispersed in 30 mL of 0.05 M NaOH solution by ultrasonication, and the GO dispersion was added in 100 mL of HACC aqueous solution (0.1% w/v) to generate HACC-GO. Then the pH of the solution was

A simple extension of the commonly used fitting equation for oscillatory structural forces in case of silica nanoparticle suspensions

• Sebastian Schön and
• Regine von Klitzing

Beilstein J. Nanotechnol. 2018, 9, 1095–1107, doi:10.3762/bjnano.9.101

• ][56] also used double-layer forces to describe deviations between experimental force data and oscillatory structural forces. The system consisted of two silica particles in an aqueous solution of a like-charged strong polyelectrolyte (NaPSS). The increase of the deviation energy with increasing silica

Enzymatically promoted release of organic molecules linked to magnetic nanoparticles

• Chiara Lambruschini,
• Silvia Villa,
• Luca Banfi,
• Fabio Canepa,
• Fabio Morana,
• Annalisa Relini,
• Paola Riani,
• Renata Riva and
• Fulvio Silvetti

Beilstein J. Nanotechnol. 2018, 9, 986–999, doi:10.3762/bjnano.9.92

• obtained by two different methodologies. The first one was a coprecipitation method from an aqueous solution of stoichiometric amounts of FeCl2·4H2O and FeCl3·6H2O under basic conditions [34][35]. In order to have a functional group suitable for joining the linker, these nanoparticles where functionalised

• . The white solid was filtered off and the solution was partitioned between EtOAc (20 mL) and NaHCO3 (saturated solution, 30 mL). The aqueous phase was extracted with EtOAc (3 × 20 mL) and the combined organic phases were washed with 5% (NH4)H2PO4 (aqueous solution) and brine. The organic phase was

• )carbonyl)-D-valyl-L-leucyl-N6-(tert-butoxycarbonyl)-L-lysine (5): To a solution of 4 (1.30 g, 2.34 mmol) in 1:2.5 DMF/acetone (15 mL, 0.16 M), 1 M NaOH (aqueous solution, 4.8 mL, 4.80 mmol) was added at rt. After stirring for 2 h, the volatile components were removed and the residue was partitioned between

Nanoscale mapping of dielectric properties based on surface adhesion force measurements

• Ying Wang,
• Yue Shen,
• Xingya Wang,
• Zhiwei Shen,
• Bin Li,
• Jun Hu and
• Yi Zhang

Beilstein J. Nanotechnol. 2018, 9, 900–906, doi:10.3762/bjnano.9.84

• Sample preparation An aqueous solution of single-layered GO sheets was prepared from graphite powder following a modified Hummer’s method [47][48][49]. A drop of 10 µL of as-prepared GO solution (50 ng/µL) was placed onto a mica substrate. Chemical reduction of GO was performed by exposure to a saturated

Facile chemical routes to mesoporous silver substrates for SERS analysis

• Elina A. Tastekova,
• Alexander Y. Polyakov,
• Anastasia E. Goldt,
• Alexander V. Sidorov,
• Alexandra A. Oshmyanskaya,
• Irina V. Sukhorukova,
• Dmitry V. Shtansky,
• Wolgang Grünert and
• Anastasia V. Grigorieva

Beilstein J. Nanotechnol. 2018, 9, 880–889, doi:10.3762/bjnano.9.82

• was added to the World Anti-Doping Agency’s (WADA) prohibited list as a doping substance [35]. The corresponding analyte was investigated as an aqueous solution of 1 × 10−3 M and 1 × 10−2 M total concentrations. We used its unique Raman spectra from the source [36] to identify the substance. The most

• procedure reported by Lyu et al. [26]. Briefly, 0.05 g of crystalline silver nitrate (Carl Roth GmbH, ≥99%, Ph.Eur., extra pure) was dissolved in 210 mL of 0.2 M ammonium nitrate NH4NO3 aqueous solution. PVP solution was added slowly in the PVP monomeric unit/silver at atomic ratios of 5:1 or 10:1. The

Perfusion double-channel micropipette probes for oxygen flux mapping with single-cell resolution

• Yang Gao,
• Bin Li,
• Riju Singhal,
• Adam Fontecchio,
• Ben Pelleg,
• Zulfiya Orynbayeva,
• Yury Gogotsi and
• Gary Friedman

Beilstein J. Nanotechnol. 2018, 9, 850–860, doi:10.3762/bjnano.9.79

• fluorescein (Acros Organics, Fisher Scientific; excitation/emission wavelengths 498/518 nm) aqueous solution (0.08 wt %). The extraction channel was loaded with pure water. Two plastic tubes were then inserted into the two unmodified channels at the other end of the theta capillary and sealed with epoxy (Bob

• was set to 2407 μM (fluorescein saturated aqueous solution). The diffusion coefficient was set to 0.425 × 10−5 cm2/s (fluorescein diffusion coefficient in water at room temperature [47]). No cells or consumers were included in this hydrodynamic confinement discussion. Then similar model parameters

• inserted into the water drop. The injection channel is preloaded with a saturated fluorescein aqueous solution (0.08 wt %). The green color represents the fluorescein dye (fluorescein), with the green intensity proportional to the dye concentration. The small green area volume within the water drop

Noble metal-modified titania with visible-light activity for the decomposition of microorganisms

• Maya Endo,
• Zhishun Wei,
• Kunlei Wang,
• Baris Karabiyik,
• Kenta Yoshiiri,
• Paulina Rokicka,
• Bunsho Ohtani,
• Agata Markowska-Szczupak and
• Ewa Kowalska

Beilstein J. Nanotechnol. 2018, 9, 829–841, doi:10.3762/bjnano.9.77

• brief, TiO2 samples were suspended in a 50 vol % aqueous solution of methanol, to which either AgNO3 aqueous solution or HAuCl4·H2O aqueous solution was added, suspensions were purged with argon for 15 min, and irradiated with a 400 W mercury lamp in a thermostatic water bath at 298 K under stirring

• . The spores of A. niger, A. melleus and P. chrysogenum were collected with 8.5 g/L NaCl aqueous solution, and the suspension was inoculated on the Petri dishes. Dishes were irradiated with fluorescence light or kept in dark. After three and eight days of exposure the diameters of colonies were measured

• and the appearances were checked visually. Sporulation test 20 g/L of the sample was dispersed in MEA medium, sonicated for 1 min, autoclaved at 121 °C for 10 min and dispensed to the slants. The spores of A. melleus and P. chrysogenum were collected with 8.5 g/L NaCl aqueous solution, the number of