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Blin T, Girard A, Fossard F, Guillou N, Catala L, Loiseau A, Huc V. η-Carbides (Co, Mo, or W) Nanoparticles from Octacyanometalates Precursors-Based Network. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301299. [PMID: 37154245 DOI: 10.1002/smll.202301299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/26/2023] [Indexed: 05/10/2023]
Abstract
This paper describes a simple, two-steps chemical pathway to obtain bimetallic carbide nanoparticles (NPs) of general formula MxM″yC, also called η-carbides. This process allows for a control of the chemical composition of metals present in the carbides (M = Co and M″ = Mo or W). The first step involves the synthesis of a precursor consisting of a network of octacyanometalates. The second step consists in a thermal degradation of the previously obtained octacyanometalates networks under neutral atmosphere (Ar or N2 ). It is shown that this process results in the formation of carbide NPs with diameter of ≈ 5nm, and the stoichiometries Co3 M'3 C, Co6 M'6 C, Co2 M'4 C for the CsCoM' systems.
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Affiliation(s)
- Thomas Blin
- Université Paris Saclay, UMR 104 ONERA-CNRS, LEM, F-92322, Châtillon, 92320, France
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris-Saclay, Orsay, 91190, France
| | - Armelle Girard
- Université Paris Saclay, UMR 104 ONERA-CNRS, LEM, F-92322, Châtillon, 92320, France
- Université de Versailles-Saint-Quentin-En-Yvelines (UVSQ), Université Paris-Saclay, Versailles, 78000, France
| | - Frédéric Fossard
- Université Paris Saclay, UMR 104 ONERA-CNRS, LEM, F-92322, Châtillon, 92320, France
| | - Nathalie Guillou
- Institut Lavoisier de Versailles (ILV), UMR CNRS 8180, UVSQ, Université Paris-Saclay, Versailles, 78000, France
| | - Laure Catala
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris-Saclay, Orsay, 91190, France
| | - Annick Loiseau
- Université Paris Saclay, UMR 104 ONERA-CNRS, LEM, F-92322, Châtillon, 92320, France
| | - Vincent Huc
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris-Saclay, Orsay, 91190, France
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Lefebvre W, da Costa G, Castro C, Vurpillot F. Combining Structure, Chemistry and Properties at the Nanoscale with Correlative Tomography Approaches. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2023; 29:611. [PMID: 37613050 DOI: 10.1093/micmic/ozad067.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- Williams Lefebvre
- Université de Rouen Normandie, Groupe Physique des Matériaux, GPM UMR CNRS 6634, France
| | - Gérald da Costa
- Université de Rouen Normandie, Groupe Physique des Matériaux, GPM UMR CNRS 6634, France
| | - Celia Castro
- Université de Rouen Normandie, Groupe Physique des Matériaux, GPM UMR CNRS 6634, France
| | - François Vurpillot
- Université de Rouen Normandie, Groupe Physique des Matériaux, GPM UMR CNRS 6634, France
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Front A, Oucheriah D, Mottet C, Amara H. Melting properties of Ag xPt 1-x nanoparticles. Faraday Discuss 2023; 242:144-159. [PMID: 36173312 DOI: 10.1039/d2fd00116k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
At the nanoscale, materials exhibit unique properties that differ greatly from those of the bulk state. In the case of AgxPt1-x nanoalloys, we aimed to study the solid-liquid transition of nanoparticles of different sizes and compositions. This system is particularly interesting since Pt has a high melting point (2041 K compared to 1035 K for Ag) which could keep the nanoparticle solid during different catalytic reactions at relatively high temperatures, such as we need in the growth of nanotubes. We performed atomic scale simulations using a semi-empirical potential implemented in a Monte Carlo code at constant temperature and chemical composition in a canonical ensemble. We observed that the melting temperature decreases with decreasing size (pure systems and alloys) and increasing Ag content. We show that the melting systematically passes through an intermediate stage with a crystalline core (pure platinum or mixed PtAg depending on the composition) and a pure silver liquid skin, which strongly questions the idea of having a faceted solid particle in catalytic reactions for carbon nanotube synthesis.
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Affiliation(s)
- Alexis Front
- Laboratoire d'Etude des Microstructures, ONERA-CNRS, UMR 104, Université Paris-Scalay, BP 72, Châtillon Cedex, 92322, France.
| | - Djahid Oucheriah
- Laboratoire d'Etude des Microstructures, ONERA-CNRS, UMR 104, Université Paris-Scalay, BP 72, Châtillon Cedex, 92322, France.
| | - Christine Mottet
- Aix-Marseille Université, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille, UMR 7325, 13288 Marseille, France
| | - Hakim Amara
- Laboratoire d'Etude des Microstructures, ONERA-CNRS, UMR 104, Université Paris-Scalay, BP 72, Châtillon Cedex, 92322, France. .,Université de Paris, Laboratoire Matériaux et Phénomènes Quantiques (MPQ), CNRS-UMR7162, 75013 Paris, France
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Yang F, Zhao H, Li R, Liu Q, Zhang X, Bai X, Wang R, Li Y. Growth modes of single-walled carbon nanotubes on catalysts. SCIENCE ADVANCES 2022; 8:eabq0794. [PMID: 36240273 PMCID: PMC9565797 DOI: 10.1126/sciadv.abq0794] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Understanding the growth mechanism of single-walled carbon nanotubes (SWCNTs) and achieving selective growth requires insights into the catalyst structure-function relationship. Using an in situ aberration-corrected environmental transmission electron microscope, we reveal the effects of the state and structure of catalysts on the growth modes of SWCNTs. SWCNTs grown from molten catalysts via a vapor-liquid-solid process generally present similar diameters to those of the catalysts, indicating a size correlation between nanotubes and catalysts. However, SWCNTs grown from solid catalysts via a vapor-solid-solid process always have smaller diameters than the catalysts, namely, an independent relationship between their sizes. The diameter distribution of SWCNTs grown from crystalline Co7W6, which has a unique atomic arrangement, is discrete. In contrast, nanotubes obtained from crystalline Co are randomly dispersed. The different growth modes are linked to the distinct chiral selectivity of SWCNTs grown on intermetallic and monometallic catalysts. These findings will enable rational design of catalysts for chirality-controlled SWCNTs growth.
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Affiliation(s)
- Feng Yang
- Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Haofei Zhao
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology of Beijing, Beijing 100083, China
| | - Ruoming Li
- Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Qidong Liu
- Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinrui Zhang
- Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xuedong Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Rongming Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology of Beijing, Beijing 100083, China
| | - Yan Li
- Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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Karasawa S, Sharma KP, Yamamoto D, Saida T, Naritsuka S, Maruyama T. In situ XAFS study of the chemical state of a Co catalyst during single-walled carbon nanotube growth under conventional growth conditions using alcohol catalytic chemical vapor deposition. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Forel S, Sacco L, Castan A, Florea I, Cojocaru CS. Simple and rapid gas sensing using a single-walled carbon nanotube field-effect transistor-based logic inverter. NANOSCALE ADVANCES 2021; 3:1582-1587. [PMID: 36132564 PMCID: PMC9419661 DOI: 10.1039/d0na00811g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 01/30/2021] [Indexed: 05/22/2023]
Abstract
Single-walled carbon nanotubes (SWCNTs) are promising candidates for gas sensing applications, providing an efficient solution to the device miniaturization challenge and allowing low power consumption. SWCNT gas sensors are mainly based on field-effect transistors (SWCNT-FETs) where the modification of the current flowing through the nanotube is used for gas detection. A major limitation of these SWCNT-FETs lies in the difficulty to measure their transfer curves, since the flowing current typically varies between 10-12 and 10-3 A. Thus, voluminous and energy consuming systems are necessary, severely limiting the miniaturization and low energy consumption. Here, we propose an inverter device that combines two SWCNT-FETs which brings a concrete solution to these limitations and simplifies data processing. In this innovative sensing configuration, the gas detection is based on the variation of an electric potential in the volt range instead of a current intensity variation in the microampere range. In this study, the proof of concept is performed using NO2 gas but can be easily extended to a wide range of gases.
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Affiliation(s)
- Salomé Forel
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), CNRS, Ecole Polytechnique, IP Paris 91128 Palaiseau Cedex France
| | - Leandro Sacco
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), CNRS, Ecole Polytechnique, IP Paris 91128 Palaiseau Cedex France
| | - Alice Castan
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), CNRS, Ecole Polytechnique, IP Paris 91128 Palaiseau Cedex France
| | - Ileana Florea
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), CNRS, Ecole Polytechnique, IP Paris 91128 Palaiseau Cedex France
| | - Costel Sorin Cojocaru
- Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), CNRS, Ecole Polytechnique, IP Paris 91128 Palaiseau Cedex France
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