Effect of the Synthesis Method on the Distribution of C, B, and N Elements in Multiwall Nanotubes: A Spatially Resolved Electron Energy Loss Spectroscopy Study

Enouz-Védrenne, Shaïma; Stéphan, Odile; Glerup, M.; Cochon, Jean-Lou; Colliex, C.; Loiseau, Annick

doi:10.1021/jp802583y

Cited by 40 publications

(26 citation statements)

References 52 publications

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“…[32] Following this, seminal contributions were made to their detailed analysis by highresolution transmission electron microscopy and electron energy loss spectroscopy, including a determination of the optical band gap. [33][34][35][36] Boron nitride nanotubes were also deposited as a composite material with carbon, [37] and boroncarbide nanofibers were obtained in an aligned manner by chemical processes from precursor compounds. [38] This chemical process to nanostructured materials, nanoparticles, nanofibers, and nanotubes is very promising; BN (in the form of particles resembling diatoms) and B 13 C 2 were synthesized, for example, from carbaboranes [39] and polyborazylenes.…”

Section: àmentioning

confidence: 99%

Boron: Elementary Challenge for Experimenters and Theoreticians

Albert¹,

Hillebrecht²

2009

Angew Chem Int Ed

559

436

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Many of the fundamental questions regarding the solid-state chemistry of boron are still unsolved, more than 200 years after its discovery. Recently, theoretical work on the existence and stability of known and new modifications of the element combined with high-pressure and high-temperature experiments have revealed new aspects. A lot has also happened over the last few years in the field of reactions between boron and main group elements. Binary compounds such as B(6)O, MgB(2), LiB(1-x), Na(3)B(20), and CaB(6) have caused much excitement, but the electron-precise, colorless boride carbides Li(2)B(12)C(2), LiB(13)C(2), and MgB(12)C(2) as well as the graphite analogue BeB(2)C(2) also deserve special attention. Physical properties such as hardness, superconductivity, neutron scattering length, and thermoelectricity have also made boron-rich compounds attractive to materials research and for applications. The greatest challenges to boron chemistry, however, are still the synthesis of monophasic products in macroscopic quantities and in the form of single crystals, the unequivocal identification and determination of crystal structures, and a thorough understanding of their electronic situation. Linked polyhedra are the dominating structural elements of the boron-rich compounds of the main group elements. In many cases, their structures can be derived from those that have been assigned to modifications of the element. Again, even these require a critical revision and discussion.

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Section: àmentioning

confidence: 99%

Boron: Elementary Challenge for Experimenters and Theoreticians

Albert¹,

Hillebrecht²

2009

Angew Chem Int Ed

559

436

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“…Various characterization techniques have been described in the literature to determine chemical interactions between the carbon nanostructures and new chemical groups attached by several methods. The characterization techniques listed below can be used either alone or in combination: [22][23][24][25][26] Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), nuclear magnetic resonance (NMR), electron energy loss spectroscopy (EELS), and imaging techniques such as high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). No reports have been found which combine the spectroscopic evaluation with imaging examination in the study of the CNFs modification via plasma polymerization.…”

Section: Introductionmentioning

confidence: 99%

Chemical Modification of Carbon Nanofibers with Plasma of Acrylic Acid

Neira‐Velázquez

Hernández‐Hernández

Ramos-deValle

et al. 2013

Plasma Process. Polym.

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Hydrophilization of carbon nanofibers (CNFs) was achieved using plasma polymerization of acrylic acid. Transmission electron microscopy (TEM) and spectroscopy techniques were used to assess the structural changes and type of chemical groups grafted on CNFs during plasma treatment. Electron energy loss spectroscopy analysis showed a decrease of sp2 bonds and an increase of sp3 bonds coming from the thin film of polyacrylic acid deposited on CNFs during the plasma treatment. X‐ray photoelectron spectroscopy (XPS) corroborated that the sp2/sp3 ratio of the treated CNFs decreased from 3.95 to 1.14. Also the presence of carbonyl and carboxyl groups were identified by XPS, whose presence promotes the hydrophilic character of CNFS and their dispersion in water. An amorphous structure on the surface of treated CNFs, which corresponds to the nanocoating of polyacrylic acid deposited by plasma, was observed by TEM.

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“…[32] Zu deren detaillierter Analyse mittels hochauflösender Transmissionselektronenmikroskopie (TEM) und Elektronenenergieverlustspektroskopie (EELS), durch die auch die optische Bandlücke ermittelt wurde, erschienen in der Folge richtungsweisende Arbeiten. [33][34][35][36] Bornitrid-Nanoröhren wurden auch als Komposit mit Kohlenstoff, [37] Borcarbid-Nanofasern sogar geordnet mittels chemischen Prozessen aus Vorstufenverbindungen abgeschieden. [38] Dieser chemische Prozess zu nanostrukturierten Materialien, Nanopartikeln und Nanofasern und -röhren ist sehr vielversprechend; BN (in Form Diatomeenähnlicher Partikel) und B 13 C 2 wurde so z.…”

Section: Introductionunclassified

Bor – elementare Herausforderung für Experimentatoren und Theoretiker

Albert

Hillebrecht

2009

Angewandte Chemie

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Auch mehr als zweihundert Jahre nach der Entdeckung des Elementes Bor gibt es auf viele grundlegende Fragen in der Festkörperchemie von Bor noch keine eindeutigen Antworten. In jüngster Zeit zeigten theoretische Arbeiten zur Stabilität und Existenz bekannter und neuer Modifikationen des Elements in Verbindung mit Hochdruck‐ und Hochtemperaturexperimenten neue Aspekte. Auch auf dem Gebiet der Reaktionen von Bor mit Hauptgruppenelementen hat sich in den letzten Jahren viel getan. Aufsehen haben binäre Verbindungen wie B6O, MgB2, LiB1−x, Na3B20 oder CaB6 erregt, aber auch die elektronenpräzisen, farblosen Boridcarbide Li2B12C2, LiB13C2 und MgB12C2 sowie Graphit‐analoges BeB2C2 verdienen besonderes Augenmerk. Physikalische Eigenschaften wie Härte, Supraleitfähigkeit, Neutroneneinfangquerschnitt und Thermoelektrizität machen borreiche Verbindungen auch für Materialforschung und Anwendung attraktiv. Die größten wissenschaftlichen Herausforderungen bestehen jedoch weiterhin in der Synthese einphasiger Produkte in makroskopischen Mengen und in Form von Einkristallen, in der zweifelsfreien Identifizierung und Bestimmung von Zusammensetzung und Kristallstruktur sowie im Verständnis der elektronischen Situation. Verknüpfte Polyeder sind das dominierende Strukturelement in borreichen Verbindungen der Hauptgruppenelemente. In vielen Fällen leiten sich deren Strukturen von denen ab, die den Elementmodifikationen zugeschrieben werden. Auch diese bedürfen allerdings einer neuen, kritischen Durchsicht und Diskussion.

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Effect of the Synthesis Method on the Distribution of C, B, and N Elements in Multiwall Nanotubes: A Spatially Resolved Electron Energy Loss Spectroscopy Study

Cited by 40 publications

References 52 publications

Boron: Elementary Challenge for Experimenters and Theoreticians

Boron: Elementary Challenge for Experimenters and Theoreticians

Chemical Modification of Carbon Nanofibers with Plasma of Acrylic Acid

Bor – elementare Herausforderung für Experimentatoren und Theoretiker

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