3)Name the allotrope of carbon which exhibits superconductivity at a certain
temperature.___________
Answers
Answer:
A metal-doped compound of C60 (allotrope of carbon), which is one type of fullerene molecule, exhibited superconductivity at certain temperatures.
Explanation:
Carbon-based superconductors have attracted great attention of researchers in many different fields, such as physics, chemistry and material science, because the carbon (C) atom is one of the most common but important elements.
In recent decades, many allotropes have been discovered and widely studied. In the 1990s, fullerenes and carbon nanotubes were discovered and many researchers studied their chemical and physical properties. Among the above-mentioned allotropes, the metal-doped C60 compound, which is one type of fullerene molecules, showed superconductivity, and higher superconductivity transition temperatures Tc were quickly discovered. The maximum Tc is currently 0 K for Cs3C60. Since the discovery of C60 superconductors, many research papers and notable reviews have been published.
Since 2000, research on graphite and graphene has made great progress. First, new graphite superconductors were discovered and their physical properties were systematically studied. Intercalation chemistry plays an important role in graphitic superconductors, such as in C60. Secondly, the study of new physical properties characteristic of graphene, described by the relativistic Dirac equation with linear energy dispersion, was developed on a large scale. In such a situation, it is natural to target the superconductivity of graphene, and various techniques have been applied to graphene to discover superconductivity. Third, since 2010, there has been much interest in new types of superconductors; that is, metal intercalation of polycyclic hydrocarbons, traditionally known organic molecules, led to superconductivity. Tc values of 33-35 K have been discovered within a few years, but quantitative and systematic studies are lacking. In addition to these carbon-based superconductors, many superconductors, such as amorphous carbon and metal carbides, are also energetically studied.
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Answer:
Fullerene
Explanation:
A superconductor is a substance that has no electrical resistance and allows electric current to pass indefinitely.The allotrope of carbon used as a superconductor is fullerene.Buckminsterfullerene, popularly known as “buckyballs,” is a kind of fullerene that includes C60. Fullerenes have many carbon atoms (the number may vary between 30 and 900) held together in a cage-like structure.They are used as superconductors because they provide minimum resistance to the flow of current. Carbon-based superconductors have attracted great attention of researchers in many different fields, such as physics, chemistry and material science, because the carbon (C) atom is one of the most common but important elements. A metal-doped compound of C60 (allotrope of carbon), which is one type of fullerene molecule, exhibited superconductivity at certain temperatures.
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