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Search for "noble metals" in Full Text gives 109 result(s) in Beilstein Journal of Nanotechnology.

Atomic layer deposition for efficient oxygen evolution reaction at Pt/Ir catalyst layers

  • Stefanie Schlicht,
  • Korcan Percin,
  • Stefanie Kriescher,
  • André Hofer,
  • Claudia Weidlich,
  • Matthias Wessling and
  • Julien Bachmann

Beilstein J. Nanotechnol. 2020, 11, 952–959, doi:10.3762/bjnano.11.79

Graphical Abstract
  • significant cost of theses noble metals renders it necessary to minimize their loading and maintain optimal access of the electrolyte to every active site of their surface. Numerous studies have been dedicated to the development of such bimetallic catalysts in various compositions [11], using various coating
  • ), a rather thick layer of the order of 1 μm is observed. Some cracks can be detected on the egdes of the coating where the fibers cross, due to low transport rates at these locations and high mechanical stress. The existence of the noble metals is proven by energy-dispersive X-ray analysis (EDX
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Published 22 Jun 2020

Nickel nanoparticles supported on a covalent triazine framework as electrocatalyst for oxygen evolution reaction and oxygen reduction reactions

  • Secil Öztürk,
  • Yu-Xuan Xiao,
  • Dennis Dietrich,
  • Beatriz Giesen,
  • Juri Barthel,
  • Jie Ying,
  • Xiao-Yu Yang and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2020, 11, 770–781, doi:10.3762/bjnano.11.62

Graphical Abstract
  • developed. Noble metals (Ir, Ru) and their oxides are the current commercial electrocatalysts for the OER, whereas Pt metal is the benchmark catalyst for the ORR [4][5]. Yet, all these catalysts have drawbacks such as scarcity and high cost, which are disadvantageous for their large-scale production and
  • application. Consequently, researchers are working on discovering and developing catalysts for OER and ORR that are metal-free or based on non-noble metals, stable and earth-abundant [6][7][8][9][10]. Among the transition-metal-based OER and ORR catalysts, Ni-containing catalysts are promising candidates [7
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Published 11 May 2020

Effect of Ag loading position on the photocatalytic performance of TiO2 nanocolumn arrays

  • Jinghan Xu,
  • Yanqi Liu and
  • Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

Graphical Abstract
  • resonance (SPR), which leads to strongly absorbed visible light and enhancement of local electromagnetic fields [14]. Among the noble metals, Ag nanostructures have been widely used as catalysts because of their reasonable cost and broad plasmon resonance in the visible region [15][16]. At present, the
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Published 05 May 2020

Electromigration-induced directional steps towards the formation of single atomic Ag contacts

  • Atasi Chatterjee,
  • Christoph Tegenkamp and
  • Herbert Pfnür

Beilstein J. Nanotechnol. 2020, 11, 680–687, doi:10.3762/bjnano.11.55

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  • only observed for alkali metals, but also in monovalent noble metals such as Ag and Au [10][11]. These experimental findings could be very well correlated with the theoretical simulations of conductance histograms [7][12][13]. The theoretical calculation of conductance histograms is based on the semi
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Published 22 Apr 2020

Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery

  • Varsha Sharma and
  • Anandhakumar Sundaramurthy

Beilstein J. Nanotechnol. 2020, 11, 508–532, doi:10.3762/bjnano.11.41

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  • resonance of the outer shell electrons present in noble metals. The absorbed light is converted to heat energy, which causes layer damage, thereby opening the capsules and releasing the encapsulated material [83]. The parameters such as the preparation condition of capsules, the distribution and aggregation
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Published 27 Mar 2020

DFT calculations of the structure and stability of copper clusters on MoS2

  • Cara-Lena Nies and
  • Michael Nolan

Beilstein J. Nanotechnol. 2020, 11, 391–406, doi:10.3762/bjnano.11.30

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  • transition metals, as well as Ag and Au. However, most studies have examined single-atom adsorption or adsorbed nanoparticles of noble metals. This means there is a knowledge gap in terms of thin film nucleation on 2D materials. To begin addressing this issue, we present in this paper a first-principles
  • 2D materials can function as barrier materials to prevent copper diffusion into the underlying dielectric material. While there have been studies of single-atom adsorption at MoS2 [26][29] and the adsorption of larger nanoclusters of noble metals, [25] there is as yet no comprehensive study of the
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Published 26 Feb 2020

Formation of metal/semiconductor Cu–Si composite nanostructures

  • Natalya V. Yumozhapova,
  • Andrey V. Nomoev,
  • Vyacheslav V. Syzrantsev and
  • Erzhena C. Khartaeva

Beilstein J. Nanotechnol. 2019, 10, 2497–2504, doi:10.3762/bjnano.10.240

Graphical Abstract
  • can be oxides, noble metals, phosphates or polymers [3][4]. Compositions of materials that are immiscible in the bulk state, such as Mo–Cu [5], Ag–Si [6], Ag–Cu [7], Au–Ni [8], are of special interest. Shells can have both a smooth spherical or a polyhedral shape, can have mesopores [9] or dendrites
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Published 13 Dec 2019

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

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  • flexible polymer composite materials. Keywords: finite element method; mechanical properties; molecular dynamics; nanowires; Introduction Nanostructures comprised of noble metals with face centered cubic (FCC) crystal structure (Au, Ag and Cu according to the most common physical definition) prepared via
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Published 12 Dec 2019

Kelvin probe force microscopy of the nanoscale electrical surface potential barrier of metal/semiconductor interfaces in ambient atmosphere

  • Petr Knotek,
  • Tomáš Plecháček,
  • Jan Smolík,
  • Petr Kutálek,
  • Filip Dvořák,
  • Milan Vlček,
  • Jiří Navrátil and
  • Čestmír Drašar

Beilstein J. Nanotechnol. 2019, 10, 1401–1411, doi:10.3762/bjnano.10.138

Graphical Abstract
  • , it strongly depends on the size of the metal particles. The results are in good agreement with the macroscopic UPS results (1 mm2) obtained in UHV. The investigation of the Schottky barrier in ambient atmosphere is limited to noble metals only, as the Mo nanolayer reacts with oxygen forming MoOx at
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Published 15 Jul 2019

Construction of a 0D/1D composite based on Au nanoparticles/CuBi2O4 microrods for efficient visible-light-driven photocatalytic activity

  • Weilong Shi,
  • Mingyang Li,
  • Hongji Ren,
  • Feng Guo,
  • Xiliu Huang,
  • Yu Shi and
  • Yubin Tang

Beilstein J. Nanotechnol. 2019, 10, 1360–1367, doi:10.3762/bjnano.10.134

Graphical Abstract
  • the carriers migrating to the surface of the semiconductor to participate in the photoreactions [15]. Decorating semiconductors with noble metals, such as Ag, Au, and Pt, is a strategy to enhance the photocatalytic performance. Certain noble metals exhibiting surface plasmon resonance (SPR) can
  • promote the absorption of visible light and produce hot charge carriers that can increase the charge density of the substrate semiconductor [16][17]. In addition, as an effective electron sink, noble metals can capture photogenerated electrons and leave holes on the surface of semiconductors, which can be
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Published 04 Jul 2019

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

Graphical Abstract
  • diameter was calculated to be 2.4 ± 1 nm. The inductively coupled plasma optical emission spectrometry (ICP-OES) analysis give a weight ratio of 3.8% for Co and 45.5% for Pt. These results show that this new washing procedure is efficient to removed unalloyed non noble metals. Its impact on the structure
  • . The use of Pt3M/N-CNT catalysts results in the reduction in the quantity of H2O2 produced during the ORR compared to the commercial Pt3Co/CB catalyst. After ex situ validation of the catalyst, the treatment with EDTA solution to remove unalloyed non noble metals (Co or Ni) was employed. The
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Published 21 Jun 2019

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

Graphical Abstract
  • , particularly noble metals, as well as the use of semiconducting mixed oxides, e.g., TiO2/ZnO, are promising approaches, necessary to deeply study the correlations between electronic configuration, bandgap energy and photochemical efficiency. Improvements could be expected by controlled modification of the
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Published 31 May 2019

Deposition of metal particles onto semiconductor nanorods using an ionic liquid

  • Michael D. Ballentine,
  • Elizabeth G. Embry,
  • Marco A. Garcia and
  • Lawrence J. Hill

Beilstein J. Nanotechnol. 2019, 10, 718–724, doi:10.3762/bjnano.10.71

Graphical Abstract
  • methylene blue. This hybrid approach using traditional organic ligands for the synthesis of well-defined nanorods followed by [bmim][Tf2N] for metal deposition was found to be applicable to other noble metals in addition to platinum. Gold and silver nanoparticles were also deposited onto CdSe@CdS nanorods
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Published 14 Mar 2019

Mo-doped boron nitride monolayer as a promising single-atom electrocatalyst for CO2 conversion

  • Qianyi Cui,
  • Gangqiang Qin,
  • Weihua Wang,
  • Lixiang Sun,
  • Aijun Du and
  • Qiao Sun

Beilstein J. Nanotechnol. 2019, 10, 540–548, doi:10.3762/bjnano.10.55

Graphical Abstract
  • the potential in the range of −0.3 to −1.0 V, involving noble metal and non-noble metals, both theoretically and experimentally. According to previous research, the application of non-noble metals as catalysts for CO2 reduction to CH4 could overcome the high cost of noble metal catalysts, however, the
  • of CO2 to CH4 is 0.64 and 0.77 eV [9]. In addition, the performance of Mo-doped BN is comparable to or even better than some catalysts composed of noble metals, such as titania-modified silver (0.47 eV) [48], and osmium and ruthenium atom doped graphene (0.52 eV) [26]. The Mo-doped BN monolayer
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Published 22 Feb 2019

Intuitive human interface to a scanning tunnelling microscope: observation of parity oscillations for a single atomic chain

  • Sumit Tewari,
  • Jacob Bakermans,
  • Christian Wagner,
  • Federica Galli and
  • Jan M. van Ruitenbeek

Beilstein J. Nanotechnol. 2019, 10, 337–348, doi:10.3762/bjnano.10.33

Graphical Abstract
  • the other way around. A phase change can arise with the type of monovalent atom forming the chain (alkali metals or noble metals) [55] but can also arise due to the coupling between the electrode and the atomic chain [53][54]. The controlled experiment described in Figure 6 not only shows clearly
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Published 04 Feb 2019

A Ni(OH)2 nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water

  • Donghui Zheng,
  • Man Li,
  • Yongyan Li,
  • Chunling Qin,
  • Yichao Wang and
  • Zhifeng Wang

Beilstein J. Nanotechnol. 2019, 10, 281–293, doi:10.3762/bjnano.10.27

Graphical Abstract
  • surfaces by a hydrothermal method in H2O2 solution [26]. However, all above syntheses of nickel hydroxides require high temperature, nickel salts or/and oxidants that are toxic and hard to clean up. Moreover, the use of noble metals also increases the synthesis cost. To the best of our knowledge, there is
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Published 25 Jan 2019

Interaction of Te and Se interlayers with Ag or Au nanofilms in sandwich structures

  • Arkadiusz Ciesielski,
  • Lukasz Skowronski,
  • Marek Trzcinski,
  • Ewa Górecka,
  • Wojciech Pacuski and
  • Tomasz Szoplik

Beilstein J. Nanotechnol. 2019, 10, 238–246, doi:10.3762/bjnano.10.22

Graphical Abstract
  • grain boundaries towards the surface of the metal film, Se or Te atoms can induce additional plasmonic absorption bands in the permittivity of Ag and Au. Controlling this process could allow for engineering of the optical parameters of noble metals as well as enhanced nonlinear effects [33]. Moreover
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Published 21 Jan 2019

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

Graphical Abstract
  • to planar samples at pH 4. Finally, their electrocatalytic performance depends on the geometric parameters and is optimized with 13 μm pore length, which yields 2.6 mA cm−2, or 49 A g−1, at η = 0.20 V. Keywords: electrochemistry; nanostructures; noble metals; ruthenium catalyst; water splitting
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Published 11 Jan 2019

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

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  • between S-rGO and SnO2 lead to the good sensing properties. Because noble metals offer exceptional catalytic activity, the same group [55] developed Ag–SnO2–rGO ternary hybrids by reducing AgNO3 on the dispersion of SnO2–rGO, and the sensing properties were tested at room temperature. The authors
  • micromorphology of hybrids. An important way to enhance the selectivity of composite sensors is mixing or doping with other phases (noble metals or conducting polymers). Similarly, the recovery time can be reduced by surface functionalization of graphene/metal-oxide hybrids with specific functional molecules such
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Published 09 Nov 2018

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

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  • /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
  • ][52]. This previously prompted us to carry out a multicentre study where the same silver nanoparticles were investigated in different laboratories with different biological assays [44]. Following the same approach, we have synthesized and thoroughly characterized nanoparticles of the noble metals Rh
  • noble metals has been described in the literature [54]. The shape-controlled synthesis of noble metal nanostructures can be achieved by different experimental procedures that aim to control nucleation, crystal growth, and finally, colloidal stabilization [55][56][57][58]. A very prominent method is the
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Published 29 Oct 2018

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

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  • metal surfaces proposed in [1] has been the subject of intensive research over the past years [2][3][4]. Several groups showed that the IR response by organic molecules can be significantly enhanced in a variety of organic systems by depositing the molecules on nanostructured surfaces of noble metals
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Published 05 Oct 2018

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

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  • 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
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Published 27 Sep 2018

Improved catalytic combustion of methane using CuO nanobelts with predominantly (001) surfaces

  • Qingquan Kong,
  • Yichun Yin,
  • Bing Xue,
  • Yonggang Jin,
  • Wei Feng,
  • Zhi-Gang Chen,
  • Shi Su and
  • Chenghua Sun

Beilstein J. Nanotechnol. 2018, 9, 2526–2532, doi:10.3762/bjnano.9.235

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  • global warming effects, around 25 times greater than that of carbon dioxide (CO2). For a more efficient use of natural gas and to minimize the direct emission of CH4, the catalytic oxidation of CH4 at low temperature has been investigated extensively over the last decades [5][6][7][8]. Noble metals have
  • , such as transition metal (TM) oxides and various complex structures (e.g., perovskite, spinel and hexaaluminate) have been tested as catalysts for CH4 oxidation. But so far their performance is still much lower than noble metals. An ideal catalyst for CH4 oxidation should have a high capacity to adsorb
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Published 24 Sep 2018

Dumbbell gold nanoparticle dimer antennas with advanced optical properties

  • Janning F. Herrmann and
  • Christiane Höppener

Beilstein J. Nanotechnol. 2018, 9, 2188–2197, doi:10.3762/bjnano.9.205

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  • interaction of linker molecules, which may be used for a directed assembly of individual antenna parts. Besides of the general discussion on methodologies, the effect of the crystallinity of the employed noble metals has attracted attention [45]. The versatility of colloidal chemistry provides nowadays a tool
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Published 17 Aug 2018

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

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  • and/or calcination temperature [130]. The most effective approach to improve the gas sensing response of pure MOx 1D nanostructures is by functionalizing with different catalytic metals, MOx or noble metals [11][146]. Doping changes the reaction kinetics and electronic characteristics as well as the
  • 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
  • ] have been extensively applied for sensing of acetone, ethanol, toluene, formaldehyde and volatile organic compounds (VOCs). WO3 NFs functionalized by Au NPs exhibit improved VOC sensing properties. Noble metals onto metal oxide NFs reduce the activation energy, thus increasing their efficiency [109
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Published 13 Aug 2018
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