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

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

  • Jingxia Yang,
  • Johannes Ofner,
  • Bernhard Lendl and
  • Ulrich Schubert

Beilstein J. Nanotechnol. 2016, 7, 1815–1821, doi:10.3762/bjnano.7.174

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  • capacity. It is mostly used together with other components, such as noble metals or transition metal oxides, such as NiO or Co3O4, because synergistic effects improve the catalytic properties. Graphene-modified CeO2 greatly enhances the performance in electrochemical devices (supercapacitors, fuel cells or
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Published 23 Nov 2016

Sandwich-like layer-by-layer assembly of gold nanoparticles with tunable SERS properties

  • Zhicheng Liu,
  • Lu Bai,
  • Guizhe Zhao and
  • Yaqing Liu

Beilstein J. Nanotechnol. 2016, 7, 1028–1032, doi:10.3762/bjnano.7.95

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  • ; polyelectrolyte; Introduction Surface-enhanced Raman scattering (SERS) spectroscopy, which relies on metal nanostructures made of noble metals (Au, Ag and Cu) that sustain localized surface plasmon resonance (LSPR), is applied as a promising analytical tool for detecting and identifying trace amounts of
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Published 15 Jul 2016

Linear and nonlinear optical properties of hybrid metallic–dielectric plasmonic nanoantennas

  • Mario Hentschel,
  • Bernd Metzger,
  • Bastian Knabe,
  • Karsten Buse and
  • Harald Giessen

Beilstein J. Nanotechnol. 2016, 7, 111–120, doi:10.3762/bjnano.7.13

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  • triangles [58]. Here, the monolayers are the source of the signal, rather than the silver triangles themselves. The main hurdle, however, is the weak nonlinearity of dielectrics when compared with noble metals, such as gold or silver. Nonlinear waveguides are thus a doubly smart choice, as the waveguide
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Published 26 Jan 2016

Evaluation of gas-sensing properties of ZnO nanostructures electrochemically doped with Au nanophases

  • Elena Dilonardo,
  • Michele Penza,
  • Marco Alvisi,
  • Cinzia Di Franco,
  • Francesco Palmisano,
  • Luisa Torsi and
  • Nicola Cioffi

Beilstein J. Nanotechnol. 2016, 7, 22–31, doi:10.3762/bjnano.7.3

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  • operating temperature of the sensors [32], cycled temperature operation, and the use of nanotechnology. Among these, the use of dopants and/or catalytic elements has been considered an effective way to improve the sensor performance [33]. Specifically, the loading of MOS with noble metals (e.g., Au, Pt, and
  • Pd) that act as sensitizers or promoters, is an effective method to catalyze the gas-sensing reactions [34]. Until now, many strategies have been developed to deposit noble metals onto MOS matrices [35][36][37][38][39][40], and, although most of them are unique and effective, they are also complex
  • 300 °C, the spherical structures and the residual presence of electrolyte on Au NPs surfaces influence the gas-sensing response, yielding the worst sensor response towards NO2. Future work will be addressed to electrochemically functionalize ZnO nanocomposites with other noble metals, such as Pd, to
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Published 08 Jan 2016

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

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  • , noble metals such as gold, or oxide layers such as silica or alumina) not only prevents their aggregation due to the change in surface charge, but also protects them from oxidation [12][20][21]. Additionally, proper surface coverage increases the stability and half-life of the magnetic nanoparticles
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Published 03 Aug 2015

Materials for sustainable energy production, storage, and conversion

  • Maximilian Fichtner

Beilstein J. Nanotechnol. 2015, 6, 1601–1602, doi:10.3762/bjnano.6.163

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  • -noble metals with a long lifetime and a low kinetic barrier for conversion. For electrochemical storage, batteries based on new ionic shuttles such as sodium or magnesium are being explored. Moreover, oxygen from air could serve as an active cathode material, which does not need to be intrinsically
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Published 23 Jul 2015

Growth and morphological analysis of segmented AuAg alloy nanowires created by pulsed electrodeposition in ion-track etched membranes

  • Ina Schubert,
  • Loic Burr,
  • Christina Trautmann and
  • Maria Eugenia Toimil-Molares

Beilstein J. Nanotechnol. 2015, 6, 1272–1280, doi:10.3762/bjnano.6.131

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  • different noble metals [38]. In these cases, segmented nanowires were created by using different electrolytes for Au and Ag and by exchanging the electrolyte after the deposition of each segment. Our nanowires, in turn, are deposited from a single-bath electrolyte, which could influence the dissolution
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Published 08 Jun 2015

Synthesis, characterization and in vitro effects of 7 nm alloyed silver–gold nanoparticles

  • Simon Ristig,
  • Svitlana Chernousova,
  • Wolfgang Meyer-Zaika and
  • Matthias Epple

Beilstein J. Nanotechnol. 2015, 6, 1212–1220, doi:10.3762/bjnano.6.124

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  • of the two noble metals. Silver, as the less noble metal, is reduced more slowly than gold, leading to a slower nucleation and larger particle diameter for high silver content. Compared to the TEM images, the DCS measurements resulted in smaller nanoparticle diameters. This is due to a slightly
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Published 27 May 2015

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

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  • methods for zerovalent iron (ZVI) NP synthesis is chemical reduction. A variety of different approaches have been employed to protect this sensitive material from oxidation, where commonly used methods include coating with carbon [19][22], silica [23], noble metals and oxides [24][25][26], or the
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Published 21 May 2015

From lithium to sodium: cell chemistry of room temperature sodium–air and sodium–sulfur batteries

  • Philipp Adelhelm,
  • Pascal Hartmann,
  • Conrad L. Bender,
  • Martin Busche,
  • Christine Eufinger and
  • Juergen Janek

Beilstein J. Nanotechnol. 2015, 6, 1016–1055, doi:10.3762/bjnano.6.105

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  • been proposed [9][31][35][36][37][38] as well as noble metals [39][40][41]. In 2011, McCloskey et al. attentively figured out that catalysts such as Pt, MnO2 or Au also promote the decomposition of the aprotic electrolyte rather than the oxygen evolution reaction (see also Figure 5) [42]. Although both
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Published 23 Apr 2015

Electromagnetic enhancement of ordered silver nanorod arrays evaluated by discrete dipole approximation

  • Guoke Wei,
  • Jinliang Wang and
  • Yu Chen

Beilstein J. Nanotechnol. 2015, 6, 686–696, doi:10.3762/bjnano.6.69

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  • label-free spectroscopic tool with capabilities in real-time and multi-component analysis. Previous studies showed that Raman signals from molecules adsorbed on nanostructured metal surfaces, especially noble metals (e.g., Ag, Au), could be amplified by a factor of about 106 or even higher [3]. Although
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Published 09 Mar 2015

Self-assembled anchor layers/polysaccharide coatings on titanium surfaces: a study of functionalization and stability

  • Ognen Pop-Georgievski,
  • Dana Kubies,
  • Josef Zemek,
  • Neda Neykova,
  • Roman Demianchuk,
  • Eliška Mázl Chánová,
  • Miroslav Šlouf,
  • Milan Houska and
  • František Rypáček

Beilstein J. Nanotechnol. 2015, 6, 617–631, doi:10.3762/bjnano.6.63

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  • -based self-assembled monolayers (SAMs) [20] and silanes [21][22]. Despite the ease of preparation and high uniformity of the resulting layers, the thiol–SAMs provide an anchoring chemistry scheme limited only to noble metals. Furthermore, the established thiol bond is prone to oxidation and can be
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Published 02 Mar 2015

Palladium nanoparticles anchored to anatase TiO2 for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

  • Kah Hon Leong,
  • Hong Ye Chu,
  • Shaliza Ibrahim and
  • Pichiah Saravanan

Beilstein J. Nanotechnol. 2015, 6, 428–437, doi:10.3762/bjnano.6.43

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  • reusability trend proved the photostability of the prepared photocatalysts. Hence, the study provides a new insight about the modification of TiO2 with noble metals in order to enhance the absorption in the visible-light region for superior photocatalytic performance. Keywords: endocrine disrupting compound
  • the drawbacks of TiO2. This includes doping with either metallic/non-metallic species [13][14][15][16], forming heterostructures [17][18], and fine-tuning the morphology [19][20][21][22]. Alternatively, the coupling of semiconductor photocatalysts with noble metals (Au, Ag, Pd, Pt) turns out to be the
  • most promising strategy to defeat the limitations of TiO2. This is due to the characteristics of noble metals, which can drastically enhance the absorption of visible light through localized surface plasmon resonance effects (LSPRs) [23][24]. The LSPR absorption in noble metal NPs arise from the
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Published 11 Feb 2015

Nanoparticle shapes by using Wulff constructions and first-principles calculations

  • Georgios D. Barmparis,
  • Zbigniew Lodziana,
  • Nuria Lopez and
  • Ioannis N. Remediakis

Beilstein J. Nanotechnol. 2015, 6, 361–368, doi:10.3762/bjnano.6.35

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  • ], Si in amorphous SiO2 [37], diamond in amorphous C [38], Rh and Pd under oxidizing conditions [39], Cu in N gas [40], Au under oxidizing conditions [41], noble metals with an environment [42], complex metal hydrides [43], iron carbides [44] and dawsonites [45][46], just to name a few. Atomistic Wulff
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Published 03 Feb 2015

Synthesis and characterization of fluorescence-labelled silica core-shell and noble metal-decorated ceria nanoparticles

  • Rudolf Herrmann,
  • Markus Rennhak and
  • Armin Reller

Beilstein J. Nanotechnol. 2014, 5, 2413–2423, doi:10.3762/bjnano.5.251

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  • determination of the number of thiol groups and an estimate for the number of fluorescent molecules per nanoparticles, including a scattering correction, have been developed. Ceria nanoparticles decorated with noble metals (Pt, Pd, Rh) are models for the decomposition products of automobile catalytic converters
  • , ceria, titania and zinc oxide. This review article concentrates on synthesis and characterization of fluorescent silica and ceria NP, the latter also decorated with noble metals as models for decomposition products of automobile catalysts. We have recently reported on fluorescence-labelled coated
  • to prepare model NP of CeO2 decorated with the catalytically important noble metals platinum, palladium and rhodium. As for the silica particles, fluorescence labelling is essential for the biophysical studies. Controlling size and shape of ceria nanoparticles Many commercial ceria NP have a broad
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Published 16 Dec 2014

Synthesis of Pt nanoparticles and their burrowing into Si due to synergistic effects of ion beam energy losses

  • Pravin Kumar,
  • Udai Bhan Singh,
  • Kedar Mal,
  • Sunil Ojha,
  • Indra Sulania,
  • Dinakar Kanjilal,
  • Dinesh Singh and
  • Vidya Nand Singh

Beilstein J. Nanotechnol. 2014, 5, 1864–1872, doi:10.3762/bjnano.5.197

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  • years [12][13][14][15]. The ions of desired elements, especially those of noble metals, are implanted into a matrix with certain fluence and post-annealing of the sample leads to the formation of NPs within the matrix. The energy, which governs the stopping of ions in matter, is chosen to obtain a
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Published 24 Oct 2014

Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays

  • Christoph Rehbock,
  • Jurij Jakobi,
  • Lisa Gamrad,
  • Selina van der Meer,
  • Daniela Tiedemann,
  • Ulrike Taylor,
  • Wilfried Kues,
  • Detlef Rath and
  • Stephan Barcikowski

Beilstein J. Nanotechnol. 2014, 5, 1523–1541, doi:10.3762/bjnano.5.165

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  • inducing toxic effects due to oxidative stress. These effects are reviewed elsewhere in more detail [82][83], while this paragraph further focuses on noble metals such as gold for which ion release is negligible. Biocompatible Au-SMS were synthesized in a cylindrical batch where laser-generated gold
  • a systematic evaluation of adverse effects of less noble metals and metal oxide nanoparticles [154], their applicability to AuAg alloys may still be possible. The driving forces in this context were identified to be the surface potential and oxidation state of the nanoparticles, both potentially
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Published 12 Sep 2014

Magnesium batteries: Current state of the art, issues and future perspectives

  • Rana Mohtadi and
  • Fuminori Mizuno

Beilstein J. Nanotechnol. 2014, 5, 1291–1311, doi:10.3762/bjnano.5.143

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  • cm−1), share several critical draw backs which are: 1) The presence of chloride; which is an integral part in the make of these salts/complexes. This was found to cause severe corrosion of non-noble metals that becomes apparent at potentials exceeding 2 V vs Mg [7][8][26]. This is problematic as it
  • , possesses high oxidative stability (3.3 V vs Mg), and to date, exhibits the lowest tendency to corrode non-noble metals observed from a chloride bearing electrolyte (Figure 6). What was also notable is that the stable anion consisted of a magnesium Mg–C center as shown in Figure 6 below, indicating unique
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Published 18 Aug 2014

Self-organization of mesoscopic silver wires by electrochemical deposition

  • Sheng Zhong,
  • Thomas Koch,
  • Stefan Walheim,
  • Harald Rösner,
  • Eberhard Nold,
  • Aaron Kobler,
  • Torsten Scherer,
  • Di Wang,
  • Christian Kübel,
  • Mu Wang,
  • Horst Hahn and
  • Thomas Schimmel

Beilstein J. Nanotechnol. 2014, 5, 1285–1290, doi:10.3762/bjnano.5.142

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  • with incident electromagnetic waves at specific frequencies and induce a collective resonant absorption on the surface known as surface plasmon resonance [21]. Because of this feature, noble metals can serve as plasmon waveguides [22][23]. Especially, single-crystalline metallic materials are preferred
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Published 15 Aug 2014

Review of nanostructured devices for thermoelectric applications

  • Giovanni Pennelli

Beilstein J. Nanotechnol. 2014, 5, 1268–1284, doi:10.3762/bjnano.5.141

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  • noble metals (most commonly gold or silver, but also platinum) on a silicon substrate is used to catalyze the chemical etching of silicon by an aqueous solution of HF and an oxidant as H2O2. Following the most accepted model, H2O2 is reduced at the metal through the reaction: Thus, the metal acts as a
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Published 14 Aug 2014

Effects of palladium on the optical and hydrogen sensing characteristics of Pd-doped ZnO nanoparticles

  • Anh-Thu Thi Do,
  • Hong Thai Giang,
  • Thu Thi Do,
  • Ngan Quang Pham and
  • Giang Truong Ho

Beilstein J. Nanotechnol. 2014, 5, 1261–1267, doi:10.3762/bjnano.5.140

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  • ], compatibility with other nanodevices, and are potentially the best gas sensors. Oxides cannot easily distinguish between different types of gases, but the addition of certain noble metals as dopants can promote the gas-sensing performance [9][10][11]. Noble metal dopants in ZnO can modify the optical and
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Published 13 Aug 2014

Functionalized nanostructures for enhanced photocatalytic performance under solar light

  • Liejin Guo,
  • Dengwei Jing,
  • Maochang Liu,
  • Yubin Chen,
  • Shaohua Shen,
  • Jinwen Shi and
  • Kai Zhang

Beilstein J. Nanotechnol. 2014, 5, 994–1004, doi:10.3762/bjnano.5.113

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  • nanosized NiS surface heterojunctions. The hydrogen evolution rate over this photocatalyst could reach 1.4 mmol/h, with a QE of 33.9%. This efficiency is much higher than that of many photocatalysts containing noble metals. As shown in Figure 4, in the hybrid photocatalyst, the NiS nanoparticles can serve
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Published 09 Jul 2014

Growth and characterization of CNT–TiO2 heterostructures

  • Yucheng Zhang,
  • Ivo Utke,
  • Johann Michler,
  • Gabriele Ilari,
  • Marta D. Rossell and
  • Rolf Erni

Beilstein J. Nanotechnol. 2014, 5, 946–955, doi:10.3762/bjnano.5.108

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  • surfaces prevailing on many metaloxide surfaces are ideally suited [20][21]. However, single-wall (SW) carbon nanotubes, graphene, and a few noble metals do not possess naturally such a functional-group termination but rather inert surfaces and ALD nucleation is prohibited [22]. Hydrogen-terminated
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Published 02 Jul 2014

Nanoscale particles in technological processes of beneficiation

  • Sergey I. Popel,
  • Vitaly V. Adushkin and
  • Anatoly P. Golub'

Beilstein J. Nanotechnol. 2014, 5, 458–465, doi:10.3762/bjnano.5.53

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  • . Conclusion: The cavitation disintegration mechanism is important because the availability of high-grade deposits in the process of mining and production of noble metals is decreasing. This demands for an enhancement of the efficiency in developing low-grade deposits and in reprocessing ore dumps and tailings
  • , which contain a certain amount of noble metals in the form of finely disseminated fractions. The cavitation processes occuring on the interface between liquid and fine solid particles are occasionally more effective than the bulk cavitation processes that were considered earlier. Keywords: cavitation
  • result of the interaction of particles with collapsing cavitation bubbles was shown for the minerals most abundant in gold ore. This disintegration mechanism is important because the availability of high-grade deposits in the process of mining and production of noble metals is decreasing. This demands
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Published 11 Apr 2014

Confinement dependence of electro-catalysts for hydrogen evolution from water splitting

  • Mikaela Lindgren and
  • Itai Panas

Beilstein J. Nanotechnol. 2014, 5, 195–201, doi:10.3762/bjnano.5.21

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  • gratifying to find that the oxy-hydroxide supported Au+ and Pt+ sites become preferred only when approaching ambient conditions, as oxides of noble metals are generally unstable, a property which is often associated with their softness. Consequently, the drive to replace the hydride ion by an oxygen ion is
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Published 24 Feb 2014
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