Interplay between the structure and properties of new metastable carbon phases obtained under high pressures from fullerite C60 and carbyne

Бражкин, В. В.; Lyapin, A. G.; Попова, С. В.; Bayliss, S. C.; Varfolomeeva, T. D.; Волошин, Р. Н.; Gavrilyuk, Alexander; Kondrin, M. V.; Mukhamad’yarov, V. V.; Troyan, I. A.; Demishev, S. V.; Pronin, A. A.; Sluchanko, N. E.

doi:10.1134/1.1545583

Cited by 29 publications

(14 citation statements)

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“…[15][16][17] Contrary to the direct transition from small organic molecules or polymers to brous carbons via carbonization and then CO 2 etching, this work unveils an alternative transition from an activated carbon ake to a PCF structure undertaken under CO 2 and a co-gas atmosphere only. Hence, this transition differs from the transformations of carbon allotropes [18][19][20][21] because the former, in principle, involves convective mass transfer whereas the latter do not.…”

mentioning

confidence: 93%

The growth of porous carbon fibres through in situ vapour deposition

Zhou

Hong

2013

RSC Adv.

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This study investigates the transition of carbon flakes to porous carbon fibres (PCF) through vaporisation fragments of polyaromatic hydrocarbons (PAH) and their in situ condensation under the co-gas atmosphere of N 2 and CO 2 (v/v ¼ 1), where CO 2 plays a vital role in cutting out vaporizable PAH fragments. The polycrystalline PCF exhibit d-spacings as large as 17Å within the mesoporous framework.

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mentioning

confidence: 93%

The growth of porous carbon fibres through in situ vapour deposition

Zhou

Hong

2013

RSC Adv.

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“…The possibility of controlling semiconducting properties and mechanical characteristics by means of pressure through the change in the substance structure and atom fraction in sp-, sp 2 -and sp 3 -states is of great interest today [58]. The method of solid-phase amorphization (SSA) of high-pressure phases allows the production in the volume state of tetrahedral amorphous semiconductors based on Si and Ge and of A III B V compounds [59].…”

Section: Pile Of Hintsmentioning

confidence: 99%

“…Many metastable carbon phases obtained under pressure from fullerites, nanotubes and carbines [58]are semiconductors with the gap value ranging from 0.1 eV to 3 eV, as distinct from graphite (a semimetal) and diamond (an insulator). The possibility of controlling semiconducting properties and mechanical characteristics by means of pressure through the change in the substance structure and atom fraction in sp-, sp 2 -and sp 3 -states is of great interest today [58].…”

Section: Pile Of Hintsmentioning

confidence: 99%

High-pressure synthesized materials: treasures and hints

Бражкин

2007

High Pressure Research

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105

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The present review covers the production of new materials under high pressures. A primary limitation on the use of pressures higher than 1 GPa is a small volume and mass of a produced material. Therefore, despite an extremely wide range of new high-pressure synthesized substances with unique properties, synthesis on an commercial scale is applied up to now only to obtain superhard materials, this real treasure of today's industry. At the same time, high-pressure experiments often give material scientists a hint at what new intriguing substances can exist in principle. This is true for new superhard, semiconducting, magnetic, superconducting and optical materials already synthesized under pressure, and as well as for a large number of hypothetic new polymers from low-Z elements. Many of new materials, including the above polymers, may exist in the metastable form at normal pressure at sufficiently high temperatures.Keywords: high pressure, materials synthesis, metastable phases 1 IntroductionThe synthesis of materials under high pressure is a vast area of physics, chemistry and engineering. Should you browse the Internet to search "high pressure synthesis", the web search engines, for example, Google, would respond with over 10 mln links, making it absolutely impossible to write any comprehensive review on this topic. For this same reason, neither it is possible to list all relevant references. The purpose of this paper is to present the author's personal view on the state of art and prospects of the production of new materials by using highpressure synthesis, and to complement already existing reviews, for example [1,2]. It should be noted that a number of publications, for example [2], discuss a comparatively narrow range of materials synthesized under pressure. Other publications, for example [1], also focus on anomalous properties of materials in a strongly compressed state, although most of materials with such properties cannot be retained at normal pressure, hence, they are not directly related to the subject under consideration. In addition, the behavior of materials in a strongly compressed state has also been extensively covered in scientific literature (for example, see [3]).For physicists, the history of a high-pressure research is first of all associated with P.W. Bridgman, a 1946 Nobel Prize Laureate "for the invention of an apparatus to produce extremely high pressures, and for the discoveries he made therewith in the field of high pressure physics". Nowadays high-pressure synthesis of new materials is primarily associated with a successful synthesis of superhard materials -diamond and cubic boron nitride -in the second half of the 20 th century. At the same time, the pressures 1 -10 3 MPa have been already in use for more than a century in chemistry for the industrial production of materials. What's more, the development of relevant engineering procedures has been more than once rewarded with a Nobel Prize in chemistry. In 1918, F. Haber won the Nobel Prize "for the synthesis of ammonia from its el...

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“…Как видно из графика, при введении метана удельное сопротивление возрастает на несколько порядков, причем данная зависимость хорошо коррелирует с описанной выше зависимостью отношения интенсивностей I s p /I G от концентрации метана в рабочем объеме, что свидетельствует об определяющем вкладе s p-гибридизованного углерода в электропроводность всей структуры. Это также согласуется с высокими значениями удельного сопротивления, характерными для карбиноподобных материалов [30].…”

Section: удельное электросопротивлениеunclassified

Удельное электросопротивление тонких углеродных пленок с различной долей sp-связей

Завидовский¹,

Стрелецкий²,

Нищак³

et al. 2020

Журнал Технической Физики

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The technique of ion-plasma pulse-arc sputtering of graphite in a methane atmosphere has been employed to produce carbon films with different phase composition. Raman spectroscopy and transmission electron microscopy showed that increase of methane concentration in the vacuum deposition chamber leads to the growth of fraction containing sp-hybridized chains. In the investigated films structure, resistivity strongly correlates with the content of sp-hybridized carbon.

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Interplay between the structure and properties of new metastable carbon phases obtained under high pressures from fullerite C60 and carbyne

Cited by 29 publications

References 67 publications

The growth of porous carbon fibres through in situ vapour deposition

The growth of porous carbon fibres through in situ vapour deposition

High-pressure synthesized materials: treasures and hints

Удельное электросопротивление тонких углеродных пленок с различной долей sp-связей

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