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Search for "noble metal" in Full Text gives 146 result(s) in Beilstein Journal of Nanotechnology.

Nickel nanoparticle-decorated reduced graphene oxide/WO3 nanocomposite – a promising candidate for gas sensing

  • Ilka Simon,
  • Alexandr Savitsky,
  • Rolf Mülhaupt,
  • Vladimir Pankov and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

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  • Materials Research Center and Institute for Macromolecular Chemistry, Albert-Ludwigs-University Freiburg, 79104 Freiburg, Germany 10.3762/bjnano.12.28 Abstract We report for the first time the combination of WO3 sensing elements with a non-noble metal–carbon composite, namely a nickel metal nanoparticle
  • nanoparticles loaded with graphene have an enhanced acetone response at 350 °C with increased graphene loading level (best at 5 wt % graphene) [40]. ZnO nanostructures doped with nickel and rGO were used for hydrogen sensing at 100 °C [34]. The decoration of MOS with a noble metal, such as Pd or Pt, improves
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Published 15 Apr 2021

Self-standing heterostructured NiCx-NiFe-NC/biochar as a highly efficient cathode for lithium–oxygen batteries

  • Shengyu Jing,
  • Xu Gong,
  • Shan Ji,
  • Linhui Jia,
  • Bruno G. Pollet,
  • Sheng Yan and
  • Huagen Liang

Beilstein J. Nanotechnol. 2020, 11, 1809–1821, doi:10.3762/bjnano.11.163

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  • , Norway Shanghai Time Shipping CO., LTD, Shanghai, 200126, China 10.3762/bjnano.11.163 Abstract Lithium–oxygen batteries have attracted research attention due to their low cost and high theoretical capacity. Developing inexpensive and highly efficient cathode materials without using noble metal-based
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Published 02 Dec 2020

The influence of an interfacial hBN layer on the fluorescence of an organic molecule

  • Christine Brülke,
  • Oliver Bauer and
  • Moritz M. Sokolowski

Beilstein J. Nanotechnol. 2020, 11, 1663–1684, doi:10.3762/bjnano.11.149

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  • by the polar character of the B–N bonds, which induced a dipole in the adsorbed molecule. The resulting interfacial dipole–dipole interactions are thought to have a similar effect on the polarizability of the adsorbed molecule as a CT. Regarding the Raman enhancement effect of a noble metal surface
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Published 03 Nov 2020

Oxidation of Au/Ag films by oxygen plasma: phase separation and generation of nanoporosity

  • Abdel-Aziz El Mel,
  • Said A. Mansour,
  • Mujaheed Pasha,
  • Atef Zekri,
  • Janarthanan Ponraj,
  • Akshath Shetty and
  • Yousef Haik

Beilstein J. Nanotechnol. 2020, 11, 1608–1614, doi:10.3762/bjnano.11.143

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  • a fundamental point of view, gold/silver is a peculiar model system to study corrosion processes since gold is a noble metal. Interestingly, by using different types of Au/Ag nanoparticles, Lewis et al. showed how one can control and engineer, at the nanometer scale, the final shape and structure of
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Published 22 Oct 2020

Wafer-level integration of self-aligned high aspect ratio silicon 3D structures using the MACE method with Au, Pd, Pt, Cu, and Ir

  • Mathias Franz,
  • Romy Junghans,
  • Paul Schmitt,
  • Adriana Szeghalmi and
  • Stefan E. Schulz

Beilstein J. Nanotechnol. 2020, 11, 1439–1449, doi:10.3762/bjnano.11.128

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  • Abstract The wafer-level integration of high aspect ratio silicon nanostructures is an essential part of the fabrication of nanodevices. Metal-assisted chemical etching (MACE) is a promising low-cost and high-volume technique for the generation of vertically aligned silicon nanowires. Noble metal
  • nanoparticles were used to locally etch the silicon substrate. This work demonstrates a bottom-up self-assembly approach for noble metal nanoparticle formation and the subsequent silicon wet etching. The macroscopic wafer patterning has been done by using a poly(methyl methacrylate) masking layer. Different
  • fabrication uses cost-efficient subprocesses and omits expensive processes such as nanopatterning with high-resolution lithography. One low-cost method for the fabrication of such high aspect ratio templates and structures is metal-assisted chemical etching (MACE). This process uses a noble metal catalyst
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Published 23 Sep 2020

One-step synthesis of carbon-supported electrocatalysts

  • Sebastian Tigges,
  • Nicolas Wöhrl,
  • Ivan Radev,
  • Ulrich Hagemann,
  • Markus Heidelmann,
  • Thai Binh Nguyen,
  • Stanislav Gorelkov,
  • Stephan Schulz and
  • Axel Lorke

Beilstein J. Nanotechnol. 2020, 11, 1419–1431, doi:10.3762/bjnano.11.126

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  • commercial production of fuel cell catalysts, especially the scarcity of noble metals and the insufficient electrochemical long-term stability. Even though the surface-to-volume ratio can be drastically increased by the use of nanoparticles instead of thin films, the amount of noble metal (usually platinum
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Published 17 Sep 2020

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

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  • of the salts followed by their thermal decomposition. In the alternative method, more academic in nature, atomic layer deposition (ALD) is applied to the felts after anodization. ALD allows for a controlled coating with ultralow noble-metal loadings in narrow pores. In acidic electrolyte, the ALD
  • approach yields improved mass activity (557 A·g−1 as compared to 80 A·g−1 at 0.39 V overpotential) on the basis of the noble-metal loading, as well as improved stability. Keywords: atomic layer deposition (ALD); oxygen evolution reaction (OER); redox flow battery; vanadium–air redox flow battery (VARFB
  • composition and pH value, temperature, or reference electrode), or even the choice of performance parameters (current density at a given overpotential, mass activity based on noble-metal loading, or overpotential for a given current), are usually different. Hence, often direct comparisons between catalysts of
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Published 22 Jun 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

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  • surface active sites [11][12]. In addition, TiO2 combined with noble metal (e.g., Au, Ag, Pt), nanostructured to form a metal–oxide structure, has been shown to greatly improve the catalytic efficiency of the material [13]. When excited by light, noble metal nanoparticles can exhibit surface plasmon
  • . Conclusion By combining the interaction mechanism between noble metal particles and semiconductor materials using a template method, the effect of different loading positions of Ag particles on the catalytic efficiency of Ag-loaded TiO2 nanocolumn (Ag-TNC) arrays has been evaluated. According to the results
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Published 05 May 2020

Luminescent gold nanoclusters for bioimaging applications

  • Nonappa

Beilstein J. Nanotechnol. 2020, 11, 533–546, doi:10.3762/bjnano.11.42

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  • [18][19]. Luminescent nanomaterials including semiconductor quantum dots, carbon dots, metal-doped nanoparticles, noble-metal nanoparticles, and organic–inorganic hybrid nanoparticles, have been studied for their ultrabright photoluminescence (PL) [20][21][22][23]. Semiconductor quantum dots (SCQDs
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Published 30 Mar 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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  • charged silica NPs as well as the disulfide linkages between cysteine blocks and gold NPs resulted in two types of functionalities in the capsule. In a similar way, the capsules incorporated with noble metal NPs (e.g., gold and silver) respond to external light illumination by increased surface plasmon
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Published 27 Mar 2020

Evolution of Ag nanostructures created from thin films: UV–vis absorption and its theoretical predictions

  • Robert Kozioł,
  • Marcin Łapiński,
  • Paweł Syty,
  • Damian Koszelow,
  • Wojciech Sadowski,
  • Józef E. Sienkiewicz and
  • Barbara Kościelska

Beilstein J. Nanotechnol. 2020, 11, 494–507, doi:10.3762/bjnano.11.40

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  • excited by the electromagnetic field of light. The conditions for its occurrence are primarily met by materials with a large number of free electrons, which leads to intensive plasmon resonance and a negative real permittivity over a wide frequency range. Particularly important are noble-metal
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Published 25 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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  • depending on the computational setup, the authors conclude that the adsorption of noble metal chains allows for a small opening of the bandgap of graphene, although they are unable to interpret the exact mechanism by which this occurs. The adsorption of 29 atom nanoparticles of Cu, Ag and Au on a MoS2
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Published 26 Feb 2020

Using gold nanoparticles to detect single-nucleotide polymorphisms: toward liquid biopsy

  • María Sanromán Iglesias and
  • Marek Grzelczak

Beilstein J. Nanotechnol. 2020, 11, 263–284, doi:10.3762/bjnano.11.20

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  • attracted wide interest. Particularly attractive is the colorimetric detection of analytes in a liquid phase, which represents a direct way to evaluate the presence of an analyte by the naked eye. This facilitates its implementation as a transduction system in point-of-care devices. Therefore, noble metal
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Published 31 Jan 2020

Fabrication of Ag-modified hollow titania spheres via controlled silver diffusion in Ag–TiO2 core–shell nanostructures

  • Bartosz Bartosewicz,
  • Malwina Liszewska,
  • Bogusław Budner,
  • Marta Michalska-Domańska,
  • Krzysztof Kopczyński and
  • Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2020, 11, 141–146, doi:10.3762/bjnano.11.12

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  • template was used in the fabrication of rattle-type HSs of Au@TiO2 using multistep template deposition and a surface-protected etching method [13], of TiO2 HSs of mixed anatase/rutile composition loaded with noble metal NPs (Au, Pt, Pd) [14], and of N-doped Ag/TiO2 HSs [15]. A hard-templating method with a
  • growing number of applications in many fields, including catalysis and solar cells. Hence, a simple fabrication method with a low number of simple steps is desired, which would allow for good control over the structural features and physicochemical properties of titania hollow spheres modified with noble
  • metal nanoparticles. A simple method employing sol–gel coating of nanoparticles with titania followed by controlled silver diffusion was developed and applied for the synthesis of Ag-modified hollow TiO2 spheres. The morphology of the synthesized structures and their chemical composition was
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Published 10 Jan 2020

Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts

  • Maximilian Wassner,
  • Markus Eckardt,
  • Andreas Reyer,
  • Thomas Diemant,
  • Michael S. Elsaesser,
  • R. Jürgen Behm and
  • Nicola Hüsing

Beilstein J. Nanotechnol. 2020, 11, 1–15, doi:10.3762/bjnano.11.1

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  • . Both rely on the oxygen reduction reaction (ORR). The best established ORR catalysts are so far based on Pt nanoparticles or Pt alloys. However, Pt is expensive and its stability under fuel-cell working conditions is limited. Therefore, alternative catalysts based on noble-metal-free, less expensive
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Published 02 Jan 2020

The importance of design in nanoarchitectonics: multifractality in MACE silicon nanowires

  • Stefania Carapezzi and
  • Anna Cavallini

Beilstein J. Nanotechnol. 2019, 10, 2094–2102, doi:10.3762/bjnano.10.204

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  • anisotropic wet etching technique where the sculpting of the nanostructures is catalyzed by a discontinuous thin film of noble metal deposited on a substrate. The metal works as a local cathode where the reduction of oxidants occurs. The underneath semiconductor is the local anode where a charge-mediated
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Published 31 Oct 2019

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

  • William W. Bryan,
  • Riddhiman Medhi,
  • Maria D. Marquez,
  • Supparesk Rittikulsittichai,
  • Michael Tran and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

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  • [78], we needed the hydrogel particle surfaces to be positively charged. For this modification, we chose poly(diallyldimethylammonium chloride) MW: 100,000 (pDADMAC), which has been previously used to attach noble metal seeds to hydrogel cores [79][80][81]. To verify the successful functionalization
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Published 04 Oct 2019

Growth dynamics and light scattering of gold nanoparticles in situ synthesized at high concentration in thin polymer films

  • Corentin Guyot,
  • Philippe Vandestrick,
  • Ingrid Marenne,
  • Olivier Deparis and
  • Michel Voué

Beilstein J. Nanotechnol. 2019, 10, 1768–1777, doi:10.3762/bjnano.10.172

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  • nanocomposites, which globally belong to two categories: the synthesis of NPs in a liquid medium, which provides good control during their growth, or the in situ synthesis of NPs, e.g., by thermal annealing of a noble metal-doped solid phase such as HAuCl4-doped polymer films. In the latter approach there is
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Published 23 Aug 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

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  • used for the oxidative degradation of organic pollutants [18]. In this context, there is a need for more efforts regarding the design and development of efficient noble metal-decorated CuBi2O4 photocatalysts. Recently, composite photocatalysts of zero-dimensional (0D) and one-dimensional (1D) materials
  • materials promotes the dispersion and stability of 0D nanomaterials. Among the noble metal NPs, Au is considered to be one of the most promising materials because of its high photocatalytic activity, low toxicity and good biocompatibility [23][24][25]. In addition, size, shape and environment of the Au NPs
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Published 04 Jul 2019

Molecular attachment to a microscope tip: inelastic tunneling, Kondo screening, and thermopower

  • Rouzhaji Tuerhong,
  • Mauro Boero and
  • Jean-Pierre Bucher

Beilstein J. Nanotechnol. 2019, 10, 1243–1250, doi:10.3762/bjnano.10.124

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  • localized spin and the conduction electrons of the substrate. Manganese phthalocyanine (MnPc) molecules adsorbed on noble-metal surfaces have been studied quite extensively by STM and Kondo behavior of MnPc is well documented [19][20][21]. However the electron transport through a single MnPc molecule
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Published 19 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

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  • - and Pt-doped TiO2@clay nanoarchitectures based on sepiolite and montmorillonite have been also prepared by applying two different strategies: i) in situ incorporation of the noble-metal precursor (typically acetylacetonate) in the suspension of commercial organoclays (e.g., Cloisite®30B and sepiolite
  • Pangel B20, prepared by modification of montmorillonite and sepiolite with cationic surfactants, respectively) during sol-gel process, and ii) selective photodeposition of the noble metal in the previously formed TiO2@clay nanoarchitecture [131]. The good dispersion of the noble-metal NPs, clearly
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Published 31 May 2019

Revisiting semicontinuous silver films as surface-enhanced Raman spectroscopy substrates

  • Malwina Liszewska,
  • Bogusław Budner,
  • Małgorzata Norek,
  • Bartłomiej J. Jankiewicz and
  • Piotr Nyga

Beilstein J. Nanotechnol. 2019, 10, 1048–1055, doi:10.3762/bjnano.10.105

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  • percolation threshold has the SERS signal about four times lower than the highest signal sample. Keywords: metal island film; plasmon resonance; semicontinuous silver film; SERS; surface-enhanced Raman spectroscopy; Introduction Noble metal nanostructures exhibit exceptional optical properties. They can
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Published 15 May 2019

Enhanced inhibition of influenza virus infection by peptide–noble-metal nanoparticle conjugates

  • Zaid K. Alghrair,
  • David G. Fernig and
  • Bahram Ebrahimi

Beilstein J. Nanotechnol. 2019, 10, 1038–1047, doi:10.3762/bjnano.10.104

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  • systems. We have explored the potential for noble-metal nanoparticle conjugates of FluPep to enhance its antiviral activity and to determine their potential as a delivery platform for FluPep. FluPep ligand is FluPep extended at its N-terminus with the sequence CVVVTAAA, to allow for its incorporation into
  • exert its antiviral activity from the outside of the cell. Thus, the addition of FluPep to cells in culture prevents infection by influenza viruses, as does intranasal delivery of the peptide in a murine model of human influenza [15]. Noble-metal nanoparticles possess a strong plasmon absorbance, which
  • allows for the detection at very low levels, using a range of approaches, from absorbance [17][18] to photothermal microscopy [19] and various extensions of the latter [20][21]. Noble-metal nanoparticles can be passivated and functionalised with biomolecules such that they possess the biological
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Published 14 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

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  • using the methods reported here. Keywords: catalyst; ionic liquid; methylene blue; platinum; semiconductor nanorod; Introduction Core@shell semiconductor nanorods with attached noble metal particles have been widely studied as photocatalysts, and any improvement on the synthesis of these materials has
  • be used to deposit nanoscopic noble metal particles onto a well-defined semiconductor nanorod substrate with diameters less than 10 nm. We found that photodeposition of platinum onto CdSe@CdS (core@shell) nanorods proceeded readily from Pt(acac)2 in the ionic liquid 1-butyl-3-methylimidazolium bis
  • using gold. Conclusion In conclusion, we have demonstrated that deposition of noble metal nanoparticles onto CdSe@CdS nanorods is possible using the ionic liquid [bmim][Tf2N] without the need for additional surfactants or reducing agents. These procedures resulted in heterostructured particles with
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Published 14 Mar 2019

The effect of translation on the binding energy for transition-metal porphyrines adsorbed on Ag(111) surface

  • Luiza Buimaga-Iarinca and
  • Cristian Morari

Beilstein J. Nanotechnol. 2019, 10, 706–717, doi:10.3762/bjnano.10.70

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  • and their derivatives on noble-metal surfaces. Computational Details The computational setup and calculations performed for the present study were similar to those used in our study on metal phthalocyanines adsorbed on a gold surface [29]. We used the “Siesta” code [52][53][54]. One main
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Published 13 Mar 2019
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