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

Improving the catalytic activity for hydrogen evolution of monolayered SnSe2(1−x)S2x by mechanical strain

  • Sha Dong and
  • Zhiguo Wang

Beilstein J. Nanotechnol. 2018, 9, 1820–1827, doi:10.3762/bjnano.9.173

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  • non-noble metals and earth-abundant elements is a promising pathway for achieving practical electrochemical water splitting. In this work, the electronic properties and catalytic activity of monolayer SnSe2(1−x)S2x (x = 0–1) under compressive and tensile strain were investigated using density
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Published 18 Jun 2018

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

Graphical Abstract
  • TiO2 as a photocatalyst and the importance of its modification for photocatalytic reduction of Cr(VI) has also been addressed. In this review, the photocatalytic activity of TiO2 after modification with carbon-based advanced materials, metal oxides, metal sulfides and noble metals towards reduction of
  • with carbon-based advanced materials, noble metals, oxides and sulfides of transition metals for enhanced photocatalytic activity towards degradation of Cr(VI). The photocatalytic reduction of Cr(VI) over dye-sensitized TiO2 is also briefly discussed. The present review article has been divided into
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Published 16 May 2018

Understanding the performance and mechanism of Mg-containing oxides as support catalysts in the thermal dry reforming of methane

  • Nor Fazila Khairudin,
  • Mohd Farid Fahmi Sukri,
  • Mehrnoush Khavarian and
  • Abdul Rahman Mohamed

Beilstein J. Nanotechnol. 2018, 9, 1162–1183, doi:10.3762/bjnano.9.108

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  • , and Ir, exhibit high activity and resistance toward carbon formation [19][20][21]. However, these noble metals are associated with high cost and low availability, so non-noble metals, such as Ni [18][22][23][24], Fe [25][26][27][28], and Co [29][30] are most often used. Among the non-noble metals, Ni
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Published 13 Apr 2018

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

Graphical Abstract
  • due to the low redox potential of most of the metals, leading to fast oxidation or corrosion of metal sponges in ambient conditions. The oxidation stability of noble metals makes them more reliable as functional materials and thus materials such as porous silver, gold and platinum can be kept for a
  • long time in air. Mesoporous noble metals are mostly used as catalysts for high surface energy, gas sensor components, cell imaging mediators, etc. [5]. The most popular methods for mesoporous metal processing include acidic etching of bimetallic molts [6], electrochemical dealloying [7
  • distribution analysis is required for such materials as the first step towards a theoretical prediction of preferential adsorption and size selection factors. Noble metals such as silver and gold are mostly employed as SERS spectroscopy platforms because of their pronounced surface plasmons with energy in the
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Published 14 Mar 2018

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

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  • . Historically, noble metals such as gold, silver and copper have been used since ancient times for the treatment of many diseases and illnesses or for the disinfection of water. In ancient Greece and Rome, the silver or gold dishes left in the sun were believed to protect people against pathogenic
  • , clothes and dental treatment). For example, slowly released nanosilver has been used in a variety of domestic appliances, such as washing machines (e.g., Samsung SilverNanoHealth technology). Moreover, antibacterial properties of noble metals have been applied for medical purposes, including healing of
  • , by morphology design [22][23][24][25][26], surface modification [27][28][29][30][31][32], doping [33][34][35][36], or the formation of heterojunctions with other semiconductors [37][38][39][40]. Modification with noble metals seems the most promising as it is well known that under UV irradiation
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Published 07 Mar 2018

Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices

  • T. Anh Thu Do,
  • Truong Giang Ho,
  • Thu Hoai Bui,
  • Quang Ngan Pham,
  • Hong Thai Giang,
  • Thi Thu Do,
  • Duc Van Nguyen and
  • Dai Lam Tran

Beilstein J. Nanotechnol. 2018, 9, 771–779, doi:10.3762/bjnano.9.70

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  • found that the synthesis of very diverse ZnO structures was easily controllable by different methods, for example, using hydrothermal routes. Thus, ZnO nano- or even microstructures decorated by some noble metals (Au, Ag and Pt) to form plasmonic metal/semiconductor structures are very attractive and
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Published 01 Mar 2018

Mechanistic insights into plasmonic photocatalysts in utilizing visible light

  • Kah Hon Leong,
  • Azrina Abd Aziz,
  • Lan Ching Sim,
  • Pichiah Saravanan,
  • Min Jang and
  • Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

Graphical Abstract
  • metal nanoparticle surface conduction electrons [3]. This phenomenon enables these photocatalysts to concentrate the light energy surrounding it and leads to a strong improvement and activation of electron movement within the metal (i.e, noble metals) and semiconductor material [4]. Besides this
  • of plasmonics are portrayed in Figure 1. Noble metals such as Au, Ag, Pt, Pd in the form of nanoparticles are a novel candidate for high absorption of visible light owing to their strong optical absorption in the entire solar region [8][9]. The unique characteristics of the LSPR effect in noble metal
  • to the others. These two noble metals can generate a stable, high electron–hole pair density [21]. However, the lower cost of Ag makes it more desirable to be utilized for broader applications as compared to Au, and therefore, most studies utilize Ag as a plasmonic inducer [22][23][24]. Moving away
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Published 19 Feb 2018

High-contrast and reversible scattering switching via hybrid metal-dielectric metasurfaces

  • Jonathan Ward,
  • Khosro Zangeneh Kamali,
  • Lei Xu,
  • Guoquan Zhang,
  • Andrey E. Miroshnichenko and
  • Mohsen Rahmani

Beilstein J. Nanotechnol. 2018, 9, 460–467, doi:10.3762/bjnano.9.44

Graphical Abstract
  • optical components that are adjustable, like beam shapers and lenses [29]. Importantly, thermal tuning is only applicable to dielectric metasurfaces, as the low thermo-optical coefficient of most of noble metals, such as gold [38], makes plasmonic metasurfaces insensitive to variation in temperature
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Published 06 Feb 2018

Review: Electrostatically actuated nanobeam-based nanoelectromechanical switches – materials solutions and operational conditions

  • Liga Jasulaneca,
  • Jelena Kosmaca,
  • Raimonds Meija,
  • Jana Andzane and
  • Donats Erts

Beilstein J. Nanotechnol. 2018, 9, 271–300, doi:10.3762/bjnano.9.29

Graphical Abstract
  • [112][113], or by the noncrystalline structure of the studied samples [110]. Atomistic simulations for fcc noble metals [113] showed that either a decrease or increase of the Young’s modulus for metallic crystalline nanowires can be achieved by variation of their size and operation temperature. The
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Published 25 Jan 2018

Synthesis and characterization of electrospun molybdenum dioxide–carbon nanofibers as sulfur matrix additives for rechargeable lithium–sulfur battery applications

  • Ruiyuan Zhuang,
  • Shanshan Yao,
  • Maoxiang Jing,
  • Xiangqian Shen,
  • Jun Xiang,
  • Tianbao Li,
  • Kesong Xiao and
  • Shibiao Qin

Beilstein J. Nanotechnol. 2018, 9, 262–270, doi:10.3762/bjnano.9.28

Graphical Abstract
  • known to be active in numerous reactions associated with noble metals, such as CO2 hydrogenation, water gas shift, alcohol synthesis and hydrazine decomposition. Here, CH4/H2 atmosphere was not used during calcination, which was much safer and facile when compared to other methods [27]. Raman
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Published 24 Jan 2018

Comparative study of post-growth annealing of Cu(hfac)2, Co2(CO)8 and Me2Au(acac) metal precursors deposited by FEBID

  • Marcos V. Puydinger dos Santos,
  • Aleksandra Szkudlarek,
  • Artur Rydosz,
  • Carlos Guerra-Nuñez,
  • Fanny Béron,
  • Kleber R. Pirota,
  • Stanislav Moshkalev,
  • José Alexandre Diniz and
  • Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 91–101, doi:10.3762/bjnano.9.11

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  • , Electronics and Telecommunications, Av. Mickiewicza 30, 30-059 Krakow, Poland 10.3762/bjnano.9.11 Abstract Non-noble metals, such as Cu and Co, as well as noble metals, such as Au, can be used in a number modern technological applications, which include advanced scanning-probe systems, magnetic memory and
  • removing the carbon matrix and drastically reducing the electrical resistance of the deposit. Keywords: copper; gold; cobalt; focused-electron-beam-induced deposition; noble metal; non-noble metals; post-growth annealing; Introduction Focused-electron-beam-induced deposition (FEBID) constitutes a well
  • methods are not utilized in depositions of non-noble metals in order to avoid oxidation of the metals. For W–C deposits, an electrical conductivity improvement of one order of magnitude was obtained using a genetic algorithm to optimize the deposition parameters [44]. In addition, high-purity W deposits
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Published 09 Jan 2018

Gas-sensing behaviour of ZnO/diamond nanostructures

  • Marina Davydova,
  • Alexandr Laposa,
  • Jiri Smarhak,
  • Alexander Kromka,
  • Neda Neykova,
  • Josef Nahlik,
  • Jiri Kroutil,
  • Jan Drahokoupil and
  • Jan Voves

Beilstein J. Nanotechnol. 2018, 9, 22–29, doi:10.3762/bjnano.9.4

Graphical Abstract
  • oxides or noble metals [14][15][16][17]. Aside from n-type semiconductors, p-type semiconductor materials have also been extensively used for the detection of toxic gases [3][18][19]. Recently, nanocrystalline diamond (NCD) films have been utilized for advanced electronic devices because of their
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Published 03 Jan 2018

The rational design of a Au(I) precursor for focused electron beam induced deposition

  • Ali Marashdeh,
  • Thiadrik Tiesma,
  • Niels J. C. van Velzen,
  • Sjoerd Harder,
  • Remco W. A. Havenith,
  • Jeff T. M. De Hosson and
  • Willem F. van Dorp

Beilstein J. Nanotechnol. 2017, 8, 2753–2765, doi:10.3762/bjnano.8.274

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  • decrease down the periodic table: The calculated CO dissociation energies for complexes of the heavier noble metals Pd and Pt are low. Consequently, Pd(CO)4 and Pt(CO)4 are unstable and only exist in an inert gas matrix at lower temperatures [58]. Similarly, CO complexes of Au(I), a noble metal of high
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Published 20 Dec 2017

Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals

  • Somi Kang,
  • Sean E. Lehman,
  • Matthew V. Schulmerich,
  • An-Phong Le,
  • Tae-woo Lee,
  • Stephen K. Gray,
  • Rohit Bhargava and
  • Ralph G. Nuzzo

Beilstein J. Nanotechnol. 2017, 8, 2492–2503, doi:10.3762/bjnano.8.249

Graphical Abstract
  • imaging-mode and multispectral plasmonic optics [23][24][34][35][36]. This fabrication method yields highly uniform arrays of nanoholes in a dielectric substrate that upon metallization provide a plasmonic platform for SPR sensing and SERS [22][23][24][25][26][37][38]. Noble metals such as Au and Ag are
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Published 24 Nov 2017

Evaluating the toxicity of TiO2-based nanoparticles to Chinese hamster ovary cells and Escherichia coli: a complementary experimental and computational approach

  • Alicja Mikolajczyk,
  • Natalia Sizochenko,
  • Ewa Mulkiewicz,
  • Anna Malankowska,
  • Michal Nischk,
  • Przemyslaw Jurczak,
  • Seishiro Hirano,
  • Grzegorz Nowaczyk,
  • Adriana Zaleska-Medynska,
  • Jerzy Leszczynski,
  • Agnieszka Gajewicz and
  • Tomasz Puzyn

Beilstein J. Nanotechnol. 2017, 8, 2171–2180, doi:10.3762/bjnano.8.216

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  • (Au > Pd) resulted in the formation of alloy structures. More details about the characterization of Au/Pd-TiO2 structures are reported in our previous study [5]. The relationship between the amount of noble metals (Au, Pd) in the sample and the cytotoxicity to CHO-K1 cells expressed as EC50 values
  • and moderate cytotoxicity. Several possible mechanisms of cytotoxic action can be taken into account to explain observed results. First, it is well known that ionic Au and Pd are one of the most toxic forms among the noble metals. The main factor responsible for their toxicity is related to the
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Published 17 Oct 2017

Ta2N3 nanocrystals grown in Al2O3 thin layers

  • Krešimir Salamon,
  • Maja Buljan,
  • Iva Šarić,
  • Mladen Petravić and
  • Sigrid Bernstorff

Beilstein J. Nanotechnol. 2017, 8, 2162–2170, doi:10.3762/bjnano.8.215

Graphical Abstract
  • magnetic recording [6]. Currently, research in these fields is dominated by nanoparticles based on noble metals due to their strong plasmonic resonance in the visible part of the electromagnetic spectrum [7]. However, due to the wide range of parameters for separate applications, such as operation at
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Published 16 Oct 2017

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

  • Suneel Kumar,
  • Ashish Kumar,
  • Ashish Bahuguna,
  • Vipul Sharma and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

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  • nanoparticles and accelerate the photocatalytic rate by introducing more reaction sites and promoting charge separation in semiconductors [115]. In water splitting reactions, generally noble metals (e.g., Pt, Rh) and some metal oxides (e.g., NiO) act as the cocatalyst and these are loaded on the surface of
  • photocatalysts to produce more reactive sites and to reduce the activation energy for H2 and O2 gas evolution. Cocatalysts also enhances the charge separation in photocatalytic materials because of their high work function. This high work function of noble metals and some metal oxides accelerates the transfer of
  • sites for H2 evolution, increasing interfacial charge transfer and reducing the recombination probability of photogenerated electron–hole pairs [116]. However, the high cost of noble metals limits their use as cocatalysts on a large scale. Graphene has been demonstrated to be one of the best
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Published 03 Aug 2017

Synthesis of [Fe(Leq)(Lax)]n coordination polymer nanoparticles using blockcopolymer micelles

  • Christoph Göbel,
  • Ottokar Klimm,
  • Florian Puchtler,
  • Sabine Rosenfeldt,
  • Stephan Förster and
  • Birgit Weber

Beilstein J. Nanotechnol. 2017, 8, 1318–1327, doi:10.3762/bjnano.8.133

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  • procedures for nanoparticles with size control (gold [6][7], metal oxides [8][9]) and/or shape control (gold and silver [10]) are already well known. The reduction of metal salts is very common for noble metals [11], while (fast) precipitation or inverse-micelle technique are often used for metal oxides
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Published 26 Jun 2017

Assembly of metallic nanoparticle arrays on glass via nanoimprinting and thin-film dewetting

  • Sun-Kyu Lee,
  • Sori Hwang,
  • Yoon-Kee Kim and
  • Yong-Jun Oh

Beilstein J. Nanotechnol. 2017, 8, 1049–1055, doi:10.3762/bjnano.8.106

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  • temperatures to completely transform them into pure silica by oxidizing and decomposing the CH3 groups in the resist. The maximum annealing temperature was limited to 600 °C, up to which the soda lime glass does not undergo deformation. Noble metals (Au and Ag) were sputter-deposited onto the imprinted resist
  • converted silica and the substrate glass, which was heated above its glass transition temperature (564 °C) during annealing. Indeed, some glass substrates were observed to be slightly deformed after annealing at 600 °C. Thin films of noble metals were deposited on imprinted resists that were converted to
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Published 12 May 2017

Gas sensing properties of MWCNT layers electrochemically decorated with Au and Pd nanoparticles

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

Beilstein J. Nanotechnol. 2017, 8, 592–603, doi:10.3762/bjnano.8.64

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  • of CNT-based sensors, due to an increase in the number of the adsorption sites for the targeted gases [18]. CNT sidewalls can be decorated with various noble metals such as Au, Pt, Pd, Rh, and Ag [19][20][21][22][23][24]. Different methods have been used to decorate CNTs, including electrodeposition
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Published 10 Mar 2017

Photocatalysis applications of some hybrid polymeric composites incorporating TiO2 nanoparticles and their combinations with SiO2/Fe2O3

  • Andreea Laura Chibac,
  • Tinca Buruiana,
  • Violeta Melinte and
  • Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

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  • the catalytic activity of titanium(IV) oxide in the range of visible light (λ > 430 nm) can be attained by doping the TiO2 network with non-metals [16][17][18], lanthanide ions [19][20], transitional metal ions [21][22][23], noble metals [24][25] or metallic oxides [26]. Other strategies can be
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Published 27 Jan 2017

Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation

  • Amit Singhania and
  • Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 264–271, doi:10.3762/bjnano.8.29

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  • anthropogenic activities. The catalytic CO oxidation is a very well established and exploited process. So far, noble metals such as Pt, Pd, Rh and Au dominated as catalysts for CO oxidation [10][11][12]. Various supports such as Al2O3, TiO2, SiO2, CeO2, Fe2O3 and carbon nanotubes (CNTs) have also been used for
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Published 26 Jan 2017

Sensitive detection of hydrocarbon gases using electrochemically Pd-modified ZnO chemiresistors

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

Beilstein J. Nanotechnol. 2017, 8, 82–90, doi:10.3762/bjnano.8.9

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  • but lower the activation energy. The sensing response of ZnO towards most of the toxic gases in general, and towards HC gases in particular, can be improved by surface deposition of noble metals. Sivapunniyam et al. [39] have reported the improvement of ZnO-nanorod-based HC gas sensing by doping the
  • NPs on the surface of ZnO NRs improves the sensitivity and selectivity towards the detection of HCs gases at an operating temperature of 300 °C. Future work will be addressed to evaluate the sensing properties of electrochemically functionalize ZnO NRs with noble metals (e.g. Au and Pd), used as
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Published 10 Jan 2017

Surface-enhanced Raman scattering of self-assembled thiol monolayers and supported lipid membranes on thin anodic porous alumina

  • Marco Salerno,
  • Amirreza Shayganpour,
  • Barbara Salis and
  • Silvia Dante

Beilstein J. Nanotechnol. 2017, 8, 74–81, doi:10.3762/bjnano.8.8

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  • surface roughness [3][4], the latter of which can play an important role in the adhesion and proliferation of cells [5][6][7]. The self-ordered nano-structured APA, also demonstrated recently as a possible nanolithographic mask [8][9] and for chemical sensors and biosensors [10], after coating with noble
  • metals can be used for plasmonics-based enhanced spectroscopy such as in surface-enhanced Raman spectroscopy (SERS) [11][12][13][14]. In recent years, the thin form of APA (tAPA), resulting from anodization of Al films of less than 1 µm thickness, has been increasingly used because it can be better
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Published 09 Jan 2017

Fundamental properties of high-quality carbon nanofoam: from low to high density

  • Natalie Frese,
  • Shelby Taylor Mitchell,
  • Christof Neumann,
  • Amanda Bowers,
  • Armin Gölzhäuser and
  • Klaus Sattler

Beilstein J. Nanotechnol. 2016, 7, 2065–2073, doi:10.3762/bjnano.7.197

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  • various chemical elements have been investigated. In particular, foams from transition metals and noble metals have attracted attention, and interesting applications have been developed. Nickel nanofoam has been used for glucose sensing [1] and also been suggested for high-performance supercapacitor
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Published 27 Dec 2016
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