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Search for "metal oxides" in Full Text gives 213 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles as sulfur encapsulator for high-performance lithium/sulfur batteries

  • Yan Zhao,
  • Zhengjun Liu,
  • Liancheng Sun,
  • Yongguang Zhang,
  • Yuting Feng,
  • Xin Wang,
  • Indira Kurmanbayeva and
  • Zhumabay Bakenov

Beilstein J. Nanotechnol. 2018, 9, 1677–1685, doi:10.3762/bjnano.9.159

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  • Li/S batteries [5]. Another popular strategy to reduce polysulfides from dissolution is using metal oxides, such as TiO2 [6], ZnO [7], MnO2 [8], and SiO2 [9], as the additives or coating layer in the S-cathode. This is because metal oxides can provide strong binding sites with S and reduce the
  • shuttling effect [10]. In addition, metal oxides can be easily synthesized in various morphologies, e.g., hollow structures, to “hold” S [11]. Similar to S, metal oxides are, however, not conductive [12]. Therefore, an efficient approach is to use hybrids/composites of carbon materials and metal oxides, as
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Published 06 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

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  • 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
  • photocatalytic activity and light absorption range of TiO2 towards reduction of Cr(VI). The importance of the combination of metal oxides with TiO2 for photocatalytic reduction of Cr(VI) was discussed in section three. Section four highlights the enhancement of photocatalytic activity and the light absorption
  • . This also enhances the light absorption range towards longer wavelengths. The band edge potentials and band gaps of different semiconductor oxides and sulfides are given in Figure 2. Photocatalytic reduction of Cr(VI) over TiO2 modified with simple transition metal oxides under UV irradiation
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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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  • alkaline earth metal oxides, to the DRM catalyst to alter the catalyst acidity [39][45][46][47][48]. Numerous publications have reported on the ability of Mg-containing oxide catalysts to decrease the rate of carbon formation in a DRM reaction [18][19][49][50][51][52][53][54]. MgO exhibits superior surface
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Published 13 Apr 2018

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

  • Jaison Jeevanandam,
  • Ahmed Barhoum,
  • Yen S. Chan,
  • Alain Dufresne and
  • Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

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  • production methods for these carbon-based materials fabrication (except carbon black) [8]. (ii) Inorganic-based nanomaterials: These NMs include metal and metal oxide NPs and NSMs. These NMs can be synthesized into metals such as Au or Ag NPs, metal oxides such as TiO2 and ZnO NPs, and semiconductors such as
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Published 03 Apr 2018

Comparative study of antibacterial properties of polystyrene films with TiOx and Cu nanoparticles fabricated using cluster beam technique

  • Vladimir N. Popok,
  • Cesarino M. Jeppesen,
  • Peter Fojan,
  • Anna Kuzminova,
  • Jan Hanuš and
  • Ondřej Kylián

Beilstein J. Nanotechnol. 2018, 9, 861–869, doi:10.3762/bjnano.9.80

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  • ], and they are also cheaper compared to silver. These particles mainly show bactericidal effects through mechanisms (i) and (iii). Among the metal oxides, TiO2 is the best-known and most widely used semiconductor material with a wide band gap that under UV illumination generates electron–hole pairs
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Published 12 Mar 2018

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

  • Mengyuan Zhang,
  • Jiaqian Qin,
  • Pengfei Yu,
  • Bing Zhang,
  • Mingzhen Ma,
  • Xinyu Zhang and
  • Riping Liu

Beilstein J. Nanotechnol. 2018, 9, 789–800, doi:10.3762/bjnano.9.72

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  • degradation [3][4][5][6], nitrogen fixation [7][8], to solar fuel production [9]. The metal oxides, such as CdO [10], Al2O3 [11], and CuO [12][13], has attracted a lot of interest in photocatalytic applications. And among all of these metal oxides, it is titanium dioxide and zinc oxide (TiO2 and ZnO) that are
  • the most widely exploited by taking advantage of their long-term stability and environmental non-toxicity, in addition to providing a low-cost alternative to the n-type semiconductor photocatalysts [14][15][16]. However, further application of these metal oxides is usually significantly limited by the
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Published 05 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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  • precursors is higher, resulting in the core-spike architecture by minimizing the surface energy. It was found that the plasmonic metal nanomaterial/metal-oxide semiconductor structures were preferred as the nanometer-sized metal oxides for high photocatalytic activity and wide dispersion. However, in this
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Published 01 Mar 2018

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

  • Shahreen Binti Izwan Anthonysamy,
  • Syahidah Binti Afandi,
  • Mehrnoush Khavarian and
  • Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

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  • catalysts have been widely studied due to their high surface area, porosity, ability to regenerate and be reused, and good support properties [17]. Several metal oxides were impregnated with carbon-based materials such as carbon nanotubes (CNTs), activated carbon (AC), activated carbon nanofibres (ACNFs
  • that the active component was highly dispersed onto the TiO2 and CNT surface because the copper oxide was not detectable by XRD measurements. CNTs play a significant role in the catalyst structure, as they promote the distribution of metal oxides. The XPS analysis shows that the intensity peak of Cu
  • impregnated with several metal oxides (Ce, Ni, Fe, and V). The palm shell support was found to be capable of removing NO gas and further loading with metal oxides increased the conversion reaction due to the increased micropore volume of the palm shell AC. Yoon et al. [98] studied the effect of propellant
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Published 27 Feb 2018

Combined pulsed laser deposition and non-contact atomic force microscopy system for studies of insulator metal oxide thin films

  • Daiki Katsube,
  • Hayato Yamashita,
  • Satoshi Abo and
  • Masayuki Abe

Beilstein J. Nanotechnol. 2018, 9, 686–692, doi:10.3762/bjnano.9.63

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  • deposition; Introduction The surfaces of metal oxides have attractive and useful properties, such as superconductivity, ferroelectricity and catalytic activity [1]. These properties are derived from the unique structure, the electron and spin interactions, the degree of freedom of the electron orbit and the
  • lattice constant of the metal oxides. To understand and apply these characteristics, various studies have been conducted thus far, including investigations of physical properties by growth of ultra-high-quality metal oxide thin films [2][3], discovery of novel physical properties by fabricating
  • heterointerfaces using different metal oxides [4][5], and expression of conductivity and magnetism by doping metal oxides with specific elements [6][7]. In studies of metal oxide surfaces at the atomic scale, developments of observation techniques have been advancing rapidly, especially in the field of
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Published 21 Feb 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

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  • form, etc. Although many semiconductor metal oxides such as N-doped TiO2 [88], Fe2O3 [89], CdS [90] and Bi2O3 [91][92] have been reported, this section will mainly focus on TiO2, which is the most widely studied. Au or Ag nanoparticles can be employed to produce an outstanding plasmonic effect in the
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Published 19 Feb 2018

Electron interactions with the heteronuclear carbonyl precursor H2FeRu3(CO)13 and comparison with HFeCo3(CO)12: from fundamental gas phase and surface science studies to focused electron beam induced deposition

  • Ragesh Kumar T P,
  • Paul Weirich,
  • Lukas Hrachowina,
  • Marc Hanefeld,
  • Ragnar Bjornsson,
  • Helgi Rafn Hrodmarsson,
  • Sven Barth,
  • D. Howard Fairbrother,
  • Michael Huth and
  • Oddur Ingólfsson

Beilstein J. Nanotechnol. 2018, 9, 555–579, doi:10.3762/bjnano.9.53

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Published 14 Feb 2018

Facile synthesis of ZnFe2O4 photocatalysts for decolourization of organic dyes under solar irradiation

  • Arjun Behera,
  • Debasmita Kandi,
  • Sanjit Manohar Majhi,
  • Satyabadi Martha and
  • Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

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  • ]. It is important to develop a suitable environmentally friendly material that can absorb the full range of the solar spectrum for solving energy and environmental challenges. Since last decade, ternary transition metal oxides (TTMOs) have gained tremendous popularity in the field of photocatalysis by
  • the scientific community. To exploit solar light more efficiently, photocatalysts with narrow band gap (e.g., ZnSnO3 [2], Bi2WO6 [3], Ce(MoO4)2 [4] and ZnFe2O4 [5]) have been used, for absorbance of solar light in the visible region. Among ternary metal oxides, transition metal ferrites have drawn a
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Published 05 Feb 2018

Engineering of oriented carbon nanotubes in composite materials

  • Razieh Beigmoradi,
  • Abdolreza Samimi and
  • Davod Mohebbi-Kalhori

Beilstein J. Nanotechnol. 2018, 9, 415–435, doi:10.3762/bjnano.9.41

Graphical Abstract
  • oxides for metal-free catalysis [15] or in synergy with metal oxides [16][17], especially for sustainable energy applications [18][19]. Because of their electronic properties, CNT composites offer unmatched opportunities for conductive tissue regeneration [20], particularly if alignment, and thus 3D
  • compared to their random placements [13]. In recent research reported by Lee et al., two factors, the CNT length and their arrangement, were introduced as important characteristics affecting electron transport properties in the matrix of composite materials [14]. CNTs are excellent alternatives to metal
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Published 05 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

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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

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  • . Molybdenum dioxide (MoO2) materials are particularly attractive among the transition-metal oxides due to their high melting point, high chemical stability and low electrical resistivity (190 S cm−1). This material has great potential for applications in several fields such as sensing, catalysis
  • 50 cycles. The performance of the MoO2–CNF matrix for application in Li–S batteries is also compared with several other carbon nanofibers and metal oxides fibers (Table 3), which further demonstrates the long-life behavior of the sulfur/MoO2–CNF cathode. The EIS technique was used to investigate the
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Published 24 Jan 2018

Anchoring of a dye precursor on NiO(001) studied by non-contact atomic force microscopy

  • Sara Freund,
  • Antoine Hinaut,
  • Nathalie Marinakis,
  • Edwin C. Constable,
  • Ernst Meyer,
  • Catherine E. Housecroft and
  • Thilo Glatzel

Beilstein J. Nanotechnol. 2018, 9, 242–249, doi:10.3762/bjnano.9.26

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  • , Switzerland 10.3762/bjnano.9.26 Abstract The properties of metal oxides, such as charge-transport mechanisms or optoelectronic characteristics, can be modified by functionalization with organic molecules. This kind of organic/inorganic surface is nowadays highly regarded, in particular, for the design of
  • photovoltaics such as dye-sensitized solar cells (DSSCs) [1][2][3][4]. In the latter field, the wide band gap n-type semiconductor TiO2 has become one of the most common metal oxides for the design of classical n-type DSSCs, and is therefore a widely studied material, in particular in the field of scanning
  • been observed for several molecules on ionic crystals [56][57]. Comparably, it has been observed on metal oxides that molecular islands can arise undergoing a step-flow growth process [41][58]. However, depending on the studied molecule, it has also been shown that some are not adsorbed preferentially
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Published 23 Jan 2018

Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates

  • Arnau Coll,
  • Sandra Bermejo,
  • David Hernández and
  • Luís Castañer

Beilstein J. Nanotechnol. 2018, 9, 216–223, doi:10.3762/bjnano.9.23

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  • issues with structure definition [25]. Inverse opals can be created using colloidal crystals (CCs) as templates to build close packed assemblies of air spheres. Several materials have been used as templates, for example, metal oxides [26][27][28][29], semiconductors [30] or silicon [31][32][33][34
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Published 19 Jan 2018

Atomic layer deposition and properties of ZrO2/Fe2O3 thin films

  • Kristjan Kalam,
  • Helina Seemen,
  • Peeter Ritslaid,
  • Mihkel Rähn,
  • Aile Tamm,
  • Kaupo Kukli,
  • Aarne Kasikov,
  • Joosep Link,
  • Raivo Stern,
  • Salvador Dueñas,
  • Helena Castán and
  • Héctor García

Beilstein J. Nanotechnol. 2018, 9, 119–128, doi:10.3762/bjnano.9.14

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  • with a Zr/Fe atomic ratio of 2.0. Keywords: atomic layer deposition; metal oxides; thin films; Introduction Doped ZrO2 has been a subject of interest because of several potential applications, for example, in microelectronics as a memory material [1]. Also, doping a dielectric film with a magnetic
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Published 10 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

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  • : density functional theory (DFT); gas sensor; interdigital electrodes; nanocrystalline diamond; sensitivity; zinc oxide (ZnO); Introduction Currently, a number of studies have been focused on developing gas sensors based on nanomaterials and/or nanostructures. Metal oxides are the most common sensing
  • cell electrodes, light emitting devices, quantum dots and gas sensors [5][6][7][8][9][10][11][12][13]. The improvement in response of metal-oxide sensors has been observed by several authors, due to the formation of isolated functional layers on the one-dimensional nanostructure surface using metal
  • 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

One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon–carbon nanotube hybrids

  • Egor V. Lobiak,
  • Lyubov G. Bulusheva,
  • Ekaterina O. Fedorovskaya,
  • Yury V. Shubin,
  • Pavel E. Plyusnin,
  • Pierre Lonchambon,
  • Boris V. Senkovskiy,
  • Zinfer R. Ismagilov,
  • Emmanuel Flahaut and
  • Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 2669–2679, doi:10.3762/bjnano.8.267

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  • Figure S5 in Supporting Information File 1). The samples started to lose a weight at 440–450 °C and finished at 640, 690, and 620 °С, for the catalysts Co/Mo, Ni/Mo, and Fe/Mo, respectively (Figure S5 in Supporting Information File 1). The residual mass of ≈5% corresponds to metal oxides. The broad peaks
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Published 12 Dec 2017

Fabrication of CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

  • Ling Liu,
  • Jingjing Shi,
  • Hongxia Cao,
  • Ruiyu Wang and
  • Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

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  • , CeO2-based composite oxides by combining ceria with other low-valence metal oxides have been widely studied. Importantly, due to the synergistic effect between the two components, CeO2-based composite oxides exhibit a remarkable catalytic activity that is comparable with or even superior to that of
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Published 16 Nov 2017

Increasing the stability of DNA nanostructure templates by atomic layer deposition of Al2O3 and its application in imprinting lithography

  • Hyojeong Kim,
  • Kristin Arbutina,
  • Anqin Xu and
  • Haitao Liu

Beilstein J. Nanotechnol. 2017, 8, 2363–2375, doi:10.3762/bjnano.8.236

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  • metals, metal oxides, or inorganic oxides can also be used as long as they can be conformally coated at a temperature below 250 °C. Above 250 °C, the degradation of DNA nanostructures deposited onto silicon wafers starts to occur although the decomposition residue may still maintain their nanoscale
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Published 09 Nov 2017

Systematic control of α-Fe2O3 crystal growth direction for improved electrochemical performance of lithium-ion battery anodes

  • Nan Shen,
  • Miriam Keppeler,
  • Barbara Stiaszny,
  • Holger Hain,
  • Filippo Maglia and
  • Madhavi Srinivasan

Beilstein J. Nanotechnol. 2017, 8, 2032–2044, doi:10.3762/bjnano.8.204

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  • coulombic efficiency, its flat voltage curve and the low operating voltage of 0.1 V vs Li/Li+ it is limited to a lithium storage capacity of only 372 mAh g−1, given a stoichiometry of LiC6 [8]. In 2000, the Tarascon research group brought attention to transition metal oxides as a new class of possible anode
  • materials that showed capacities in the range of twice as high as graphite [9], and some of them even show values higher than 1000 mAh g−1 with the interaction with lithium ions [10]. Therefore, transition metal oxides are candidates as new, high-capacity, electrode active materials in next generation LIBs
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Published 28 Sep 2017

Functional materials for environmental sensors and energy systems

  • Michele Penza,
  • Anita Lloyd Spetz,
  • Albert Romano-Rodriguez and
  • Meyya Meyyappan

Beilstein J. Nanotechnol. 2017, 8, 2015–2016, doi:10.3762/bjnano.8.201

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  • nanomaterials (e.g., nanowires, nanotubes, graphene, metal oxides, carbon nanostructures, large band gap semiconductors, and metals) with new sensing properties (e.g., ppb-level detection, high sensitivity, selectivity) that are self-heating and provide durable operation for low-power devices (tens of μW to
  • tens of mW) are key elements for adequate air-quality measurement at indoor and outdoor levels. This Thematic Series, published in the platinum open access Beilstein Journal of Nanotechnology, is an exciting collection of works on functional nanomaterials such as metal oxides, carbon nanomaterials (e.g
  • scientific community, policy makers and social networks. The topics of this Thematic Series, based on 23 peer-reviewed articles, includes works on advanced gas sensing semiconducting materials, hybrid materials and nanocomposites for chemical sensing, catalytic sensing materials, metal oxides for chemical
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Published 26 Sep 2017

Effect of the fluorination technique on the surface-fluorination patterning of double-walled carbon nanotubes

  • Lyubov G. Bulusheva,
  • Yuliya V. Fedoseeva,
  • Emmanuel Flahaut,
  • Jérémy Rio,
  • Christopher P. Ewels,
  • Victor O. Koroteev,
  • Gregory Van Lier,
  • Denis V. Vyalikh and
  • Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 1688–1698, doi:10.3762/bjnano.8.169

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  • diameter distribution of the DWCNTs ranged from 0.5 to 2.5 nm for the inner tubes and from 1.2 to 3.2 nm for the outer tubes. DWCNTs were purified by heating the sample in air at 450 °C for 1 h followed by treatment with concentrated HCl to dissolve metal oxides [47]. Fluorination of DWCNTs using a mixture
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Published 15 Aug 2017
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