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

• limited by its significant dissolution (corrosion) at high anodic potential over the whole pH range (Figure 2) [10][11][12]. One strategy to address this limitation has involved mixing metallic Ru (or its oxides) with other solids (such as Ir [13][14][15][16][17][18], Ta [19], or Pt [20], TiO2 [21], Ni

• been reported on siliceous supports) [23][24]. The areal loadings are as low as the lowest values found in the literature (amorphous RuO2 with 49 µg cm−2 [45], mixed Ru–Pt catalyst with 15–35 µg cm−2 [20], and RuO2 nanoparticles with 49 µg cm−2) [46]. Chemical characterization of nanostructured Ru/C

Sputtering of silicon nanopowders by an argon cluster ion beam

• Xiaomei Zeng,
• Vasiliy Pelenovich,
• Zhenguo Wang,
• Wenbin Zuo,
• Sergey Belykh,
• Alexander Tolstogouzov,
• Dejun Fu and
• Xiangheng Xiao

Beilstein J. Nanotechnol. 2019, 10, 135–143, doi:10.3762/bjnano.10.13

• surface morphology, with preferable erosion of hills as compared with valleys [6], which also results in the smoothing of the surface [7]. Sputtering by an argon cluster beam has been studied for many pure metals (Cu, Ag, Au, W, Pt, Ni) and their alloys, semiconductors (Si and SiC), and insulators (SiO2

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

• layer were connected to a printed circuit board (PCB) using platinum wires. Those wires were attached to the heaters and CNT layers using silver paste that was cured in an oven at 120 °C for 30 minutes. To connect the Pt wires to the PCB we used tin wire and a soldering iron. Wire bonded sensors ready

Amorphous Ni_xCo_yP-supported TiO₂ nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution

• Yong Li,
• Peng Yang,
• Bin Wang and
• Zhongqing Liu

Beilstein J. Nanotechnol. 2019, 10, 62–70, doi:10.3762/bjnano.10.6

• (ECSA). In 0.5 mol L−1 H2SO4 electrolyte, the NixCoyP/TNAs (x = 3.84, y = 0.78) demonstrated an ECSA value of 52.1 mF cm−2, which is 3.8 times that of Ni–P/TNAs (13.7 mF cm−2). In a two-electrode system with a Pt sheet as the anode, the NixCoyP/TNAs presented a bath voltage of 1.92 V at 100 mA cm−2

• bottleneck for HER is the high overpotential associated with the process that takes place at a significant rate due to the high activation barrier and the sluggish multiple-proton-coupled electron transfer [4][5][6]. Noble metal Pt-based catalysts are widely used for HER to circumvent the overpotential

• our previous work [25][26]. In a three-electrode system, the TNAs act as the working electrode, Pt as the counter electrode, Ag/AgCl (saturated KCl) as the reference, and a constant voltage (−1.2 V vs Ag/AgCl) was applied to the system and the duration of the electrodeposition was 200 s. The

Electrolyte tuning in dye-sensitized solar cells with N-heterocyclic carbene (NHC) iron(II) sensitizers

• Mariia Karpacheva,
• Catherine E. Housecroft and
• Edwin C. Constable

Beilstein J. Nanotechnol. 2018, 9, 3069–3078, doi:10.3762/bjnano.9.285

• Pt counter-electrodes were combined using thermoplast hot-melt sealing foil (Solaronix, Test Cell Gaskets, made from Meltonix 1170-60 sealing film, 60 microns thick) by heating while pressing them together. The electrolyte was introduced into the DSC by vacuum backfilling through a hole drilled in

Electrostatic force microscopy for the accurate characterization of interphases in nanocomposites

• Diana El Khoury,
• Richard Arinero,
• Jean-Charles Laurentie,
• Mikhaël Bechelany,
• Michel Ramonda and
• Jérôme Castellon

Beilstein J. Nanotechnol. 2018, 9, 2999–3012, doi:10.3762/bjnano.9.279

• AFM (Bruker, previously Veeco, EnviroscopeTM). The probe consisted of a metal covered tip (µmasch: HQ:NSC18/Pt) supported by a cantilever electrically connected to a metallic sample holder and biased at an electrical potential. AC-biased EFM (ω = 100π rad) was employed in the double-pass configuration

Size limits of magnetic-domain engineering in continuous in-plane exchange-bias prototype films

• Alexander Gaul,
• Daniel Emmrich,
• Timo Ueltzhöffer,
• Henning Huckfeldt,
• Hatice Doğanay,
• Johanna Hackl,
• Muhammad Imtiaz Khan,
• Daniel M. Gottlob,
• Gregor Hartmann,
• André Beyer,
• Dennis Holzinger,
• Slavomír Nemšák,
• Claus M. Schneider,
• Armin Gölzhäuser,
• Günter Reiss and
• Arno Ehresmann

Beilstein J. Nanotechnol. 2018, 9, 2968–2979, doi:10.3762/bjnano.9.276

• Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34132 Kassel, Germany Faculty of Physics, Physics of supramolecular Systems and Surfaces, University of Bielefeld, 33501 Bielefeld, Germany PT-DESY, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany Peter Grünberg

Investigation of CVD graphene as-grown on Cu foil using simultaneous scanning tunneling/atomic force microscopy

• Majid Fazeli Jadidi,
• Umut Kamber,
• Oğuzhan Gürlü and
• H. Özgür Özer

Beilstein J. Nanotechnol. 2018, 9, 2953–2959, doi:10.3762/bjnano.9.274

• force minimum of both sites. Our results are consistent with these calculations. The use of pure metallic tips is not common in non-contact AFM measurements, since the widely used micro-fabricated levers are made of Si and at best these are coated with metals such as Pt/Ir in order to obtain a metallic

Ternary nanocomposites of reduced graphene oxide, polyaniline and hexaniobate: hierarchical architecture and high polaron formation

• Claudio H. B. Silva,
• Maria Iliut,
• Christopher Muryn,
• Christian Berger,
• Zachary Coldrick,
• Vera R. L. Constantino,
• Marcia L. A. Temperini and
• Aravind Vijayaraghavan

Beilstein J. Nanotechnol. 2018, 9, 2936–2946, doi:10.3762/bjnano.9.272

• Autolab). The measurements were performed with Ag/AgCl and Pt coil as reference and counter electrodes, respectively, and 1 mol·L−1 sulfuric acid as electrolyte solution. The working electrodes were prepared by dropcasting the samples on glass/Cr(5 nm)/Au(60 nm) substrates prepared by thermal evaporation

In situ characterization of nanoscale contaminations adsorbed in air using atomic force microscopy

• Jesús S. Lacasa,
• Lisa Almonte and
• Jaime Colchero

Beilstein J. Nanotechnol. 2018, 9, 2925–2935, doi:10.3762/bjnano.9.271

• . We note that although the surface composition of the cantilever imaged in Figure 1 (material: silicon nitride) and that analyzed in Figure 2A (material: Pt-coated silicon) is very different, the topography of the surfaces looks quite similar. This seems reasonable taking into account that both

• dielectric film covering the metallic Pt surface. We thus conclude, again, that the sample “uncleaned–old” must be homogeneously covered by a non-metallic contamination layer of thickness h/ε, in complete agreement with the conclusion drawn from the electrostatic images shown in Figure 2. For the sample of

• ) and we interpret that for the Pt–Pt tip–sample system used in the present work this surface-energy term is due to twice the same system: in our case Pt with a (dielectric) contamination layer. To validate our assumption, we have first imaged the tip and the flat cantilever regions of a cantilever

Charged particle single nanometre manufacturing

• Philip D. Prewett,
• Cornelis W. Hagen,
• Claudia Lenk,
• Steve Lenk,
• Marcus Kaestner,
• Tzvetan Ivanov,
• Ahmad Ahmad,
• Ivo W. Rangelow,
• Xiaoqing Shi,
• Stuart A. Boden,
• Alex P. G. Robinson,
• Dongxu Yang,
• Sangeetha Hari,
• Marijke Scotuzzi and
• Ejaz Huq

Beilstein J. Nanotechnol. 2018, 9, 2855–2882, doi:10.3762/bjnano.9.266

• van Oven et al. [65] using the organometallic precursor trimethyl(methylcyclopentadienyl)platinum(IV) (MeCpPtMe3). A combination of low beam current, low working distance and multiple pass patterning, synchronised with the 50 Hz disturbances, resulted in the successful fabrication of 3 nm Pt/C lines

Nanostructure-induced performance degradation of WO₃·nH₂O for energy conversion and storage devices

• Zhenyin Hai,
• Mohammad Karbalaei Akbari,
• Zihan Wei,
• Danfeng Cui,
• Chenyang Xue,
• Hongyan Xu,
• Philippe M. Heynderickx,
• Francis Verpoort and
• Serge Zhuiykov

Beilstein J. Nanotechnol. 2018, 9, 2845–2854, doi:10.3762/bjnano.9.265

• in 1.0 M H2SO4 aqueous solution. The as-prepared sample, a Pt wire and a Ag/AgCl electrode acted as working, counter and reference electrode, respectively. Cyclic voltammetry (CV) was conducted in the potential range from −0.8 V to +0.8 V (vs Ag/AgCl). Results and Discussion The crystal structure of

Graphene-enhanced metal oxide gas sensors at room temperature: a review

• Dongjin Sun,
• Yifan Luo,
• Marc Debliquy and
• Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

• GN showed a response of only 2.7 % at room temperature. The authors claimed that the introduction of GN not only increased the specific surface area, but also improved the conductivity of the sensor at room temperature. Bo et al. [79] grew vertical graphene (VG) on the surface of Pt IDEs, then used

Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4–8 nm diameter

• Alexander Rostek,
• Marina Breisch,
• Kevin Pappert,
• Kateryna Loza,
• Marc Heggen,
• Manfred Köller,
• Christina Sengstock and
• Matthias Epple

Beilstein J. Nanotechnol. 2018, 9, 2763–2774, doi:10.3762/bjnano.9.258

• /bjnano.9.258 Abstract For a comparative cytotoxicity study, nanoparticles of the noble metals Rh, Pd, Ag, Pt, and Au (spherical, average diameter 4 to 8 nm) were prepared by reduction in water and colloidally stabilized with poly(N-vinyl pyrrolidone) (PVP). Thus, their shape, size, and surface

• after unintended exposure [10][11][12][13][14]. Noble metal nanoparticles such as Au, Pt, Pd, and Rh have distinct catalytic properties in biology, and have been reported to show several enzyme-like activities in vitro, including reactive oxygen species scavenger activity [15][16][17][18][19][20][21][22

• , Pd, Ag, Pt and Au that are of the same size and have the same surface functionalization (PVP) to compare their biological effect on a well-established system, i.e., on human mesenchymal stem cells (hMSC). Materials and Methods Chemicals Poly(N-vinyl pyrrolidone) (PVP K 30, Povidon 30; Fluka, M

Optimization of Mo/Cr bilayer back contacts for thin-film solar cells

• Nima Khoshsirat,
• Fawad Ali,
• Vincent Tiing Tiong,
• Mojtaba Amjadipour,
• Hongxia Wang,
• Mahnaz Shafiei and
• Nunzio Motta

Beilstein J. Nanotechnol. 2018, 9, 2700–2707, doi:10.3762/bjnano.9.252

• , the back contact material should have a higher work function than the neighboring light-absorbing semiconductor layer [3]. Accordingly, different metal contacts (such as Al, Au, Cr, Mn, Mo, Pt, Ti, V and W) have been used as back contact layer in thin-film solar cells [4][5][6][7]. Among these

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

• Jesús A. Díaz-Real,
• Geyla C. Dubed-Bandomo,
• Juan Galindo-de-la-Rosa,
• Luis G. Arriaga,
• Janet Ledesma-García and
• Nicolas Alonso-Vante

Beilstein J. Nanotechnol. 2018, 9, 2628–2643, doi:10.3762/bjnano.9.244

• #2000 successively, thereafter immersed in ethanol (Sigma-Aldrich), placed in ultrasonic bath, for 15 min, and dried under N2 flow. An ethylene glycol-based solution with a concentration of 0.1M NH4F (96% purity, Alfa-Aesar) and 2% w/w deionized water was used as electrolyte. A Pt foil (99.9% purity

Pattern generation for direct-write three-dimensional nanoscale structures via focused electron beam induced deposition

• Lukas Keller and
• Michael Huth

Beilstein J. Nanotechnol. 2018, 9, 2581–2598, doi:10.3762/bjnano.9.240

• the chosen process parameters, a wide range of different materials can be obtained. On the one hand, polycrystalline metals can be realized, mainly of ferromagnetic type like Fe, Co or Fe–Co alloys [12][13] or noble metals, such as Pt, Au and Ag [14][15][16]. On the other hand, granular metals [17

• paramagnetic, nanogranular Pt(C)) involving three deposition steps is shown in Figure 13, to appear later. 3 Results We now present the results of selected deposition experiments which have been performed for both determining the parameters in the settings file setf and testing the generated pattern files for

• Co3Fe but the central vertex segment is made of nanogranular Pt(C). In this case, replacing the vertex segment by a non-ferromagnetic material is beneficial for reducing the complexity of the magnetization distribution in diamond-like 3D lattice structures [25]. 3.5 Performance Table 1 gives an overview

Nanocellulose: Recent advances and its prospects in environmental remediation

• Katrina Pui Yee Shak,
• Yean Ling Pang and
• Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

High-temperature magnetism and microstructure of a semiconducting ferromagnetic (GaSb)_1−x(MnSb)_x alloy

• Leonid N. Oveshnikov,
• Elena I. Nekhaeva,
• Alexey V. Kochura,
• Alexander B. Davydov,
• Mikhail A. Shakhov,
• Sergey F. Marenkin,
• Oleg A. Novodvorskii,
• Alexander P. Kuzmenko,
• Alexander L. Vasiliev,
• Boris A. Aronzon and
• Erkki Lahderanta

Beilstein J. Nanotechnol. 2018, 9, 2457–2465, doi:10.3762/bjnano.9.230

• samples demonstrated linear current–voltage characteristics down to sub-helium temperatures while sustaining high values of conductivity. The cross-section specimens for S/TEM studies were prepared by focus ion beam (FIB) milling in a Helios (FEI, US) SEM/FIB dual-beam system equipped with C and Pt gas

• injectors and a micromanipulator (Omniprobe, US). A 2 μm Pt layer was deposited on the surface of the sample prior to the cross-section preparation by FIB milling. Sections of approximately 8 × 5 μm2 area and 2 μm thickness were cut by 30 kV Ga+ ions, removed from the sample and then attached to the

Thickness-dependent photoelectrochemical properties of a semitransparent Co₃O₄ photocathode

• Malkeshkumar Patel and
• Joondong Kim

Beilstein J. Nanotechnol. 2018, 9, 2432–2442, doi:10.3762/bjnano.9.228

• splitting (Co3O4||Pt electrodes) in our previous report [20]. In order to verify the PEC performance, a PEC cell with dual Co3O4 electrodes was set up for volumetric measurements. The Co3O4 electrodes were loaded into two seperated vials (15 mL, Figure 7) and placed into the 1 M KOH electrolyte bath as

Pinning of a ferroelectric Bloch wall at a paraelectric layer

• Vilgelmina Stepkova and
• Jiří Hlinka

Beilstein J. Nanotechnol. 2018, 9, 2356–2360, doi:10.3762/bjnano.9.220

• is expressed in the symmetry-adapted Cartesian system [6] associated with the set of orthogonal unit vectors r || [111], s || , and t || . By definition [6], the adjacent domains differ in the sign of the Pr component. In the case of Ising walls, the integral of the Pt component across a given wall

• is zero. In the case of Bloch walls, there is an overall polarization in the Pt component within the few nanometer thickness of the given domain wall itself. This inner polarization can be negative or positive. The relaxed, equilibrium polarization profile in the simulation for pure BaTiO3 is shown

• in Figure 3. The nonzero Pt peak located at the wall implies that these domain boundaries are indeed Bloch walls. The alternating sign of the Pt component in subsequent domain walls indicates that the energetically equivalent Bloch walls present in this simulation have the same helicity. For

Lead-free hybrid perovskites for photovoltaics

• Oleksandr Stroyuk

Beilstein J. Nanotechnol. 2018, 9, 2209–2235, doi:10.3762/bjnano.9.207

• counter electron by a dissolved benzoquinone redox-couple BQ0/BQ− showed a PCE of 1.51% [137]. An FTO/TiO2/MASnCl3 photoanode (Eg = 2.1 eV) was combined with an FTO/Pt counter electrode and a solid/liquid electrolyte consisting of polyethylene oxide soaked with an acetonitrile solution of KI/I2 into a

Influence of the thickness of an antiferromagnetic IrMn layer on the static and dynamic magnetization of weakly coupled CoFeB/IrMn/CoFeB trilayers

• Deepika Jhajhria,
• Dinesh K. Pandya and
• Sujeet Chaudhary

Beilstein J. Nanotechnol. 2018, 9, 2198–2208, doi:10.3762/bjnano.9.206

• transport through metallic IrMn layers of up to 3 nm of thickness via AF spin excitations has also been previously reported in Pt/IrMn/YIG heterostructures using spin-torque FMR [17]. Also, a highly efficient spin current transfer from Y3Fe5O12 (YIG) into NiO and subsequent spin propagation in NiO with spin

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

• electronic sensitization. Traditionally, the doping is done by noble metals like Au [109][146][153][154][155][156], Ag [157][158][159][160][161], Pt [162][163][164][165][166][167][168], or Pd [75][107][148][169][170][171][172][173][174][175][176]. Moreover, noble metals can catalyse the gas sensing response

• /NTs have been doped by alkaline earth (Ae) metals [86], lanthanides (Yb, Sr, Ce) [4][8][177], rare earth metals (Pr) [7], transition metals (Fe, Y, Ni) [5][178][179], copper [180], Pd [172] and Al [181]. In addition, NPs have been doped with Pt [153], Ag [157], Ca2+/Au [146][153][154] and LaOCl [182

• ) with response and recovery times of 8 s and 5 s for 100 ppm of acetone [146]. SnO2 NTs have also been functionalized by bio-inspired Pt particles (2 nm diameter) at 0.16 wt % and Au particles (2.7 nm diameter) at 0.08 wt % using a protein nanocage by single-nozzle electrospinning [183] as shown

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

• , known optical constants and broad spectral absorption range. In presence of a Pt-catalyst precursor (H2PtCl6) in a three-electrode photo-electrochemical system (Figure 1), photogenerated electrons reach the surface of the silicon nanowires, reducing the precursor to form metallic platinum nanoparticles

• (Pt(0)). The position of the Pt deposition can be controlled by adjusting the tapering angle or the incident wavelength. The platinum photodeposition results are observed with a scanning electron microscope (SEM) and compared with the output of finite difference time domain (FDTD) simulations of the

• deposition of the platinum catalyst on the nanostructures. The sample served as the working electrode (WE) with a platinum wire counter electrode (CE) and Ag/AgCl reference electrode (RE) (Figure 1). During a typical photo-electrodeposition experiment, the sample was mounted in direct contact with a Pt