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Carbon

About: Carbon is a(n) research topic. Over the lifetime, 129882 publication(s) have been published within this topic receiving 2718066 citation(s). The topic is also known as: element 6 & C.

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D. W. Nelson1, Lee E. Sommers2Institutions (2)
03 Feb 1983-

11,091 citations


Journal ArticleDOI
Abstract: Raman spectra are reported from single crystals of graphite and other graphite materials. Single crystals of graphite show one single line at 1575 cm−1. For the other materials like stress‐annealed pyrolitic graphite, commercial graphites, activated charcoal, lampblack, and vitreous carbon another line is detected at 1355 cm−1. The Raman intensity of this band is inversely proportional to the crystallite size and is caused by a breakdown of the k‐selection rule. The intensity of this band allows an estimate of the crystallite size in the surface layer of any carbon sample. Two in‐plane force constants are calculated from the frequencies.

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8,646 citations


Book ChapterDOI
D. W. Nelson1, Lee E. Sommers2Institutions (2)
14 Feb 1996-

8,397 citations


Journal ArticleDOI
Sumio Iijima1, Toshinari Ichihashi1Institutions (1)
17 Jun 1993-Nature
Abstract: CARBON nanotubes1 are expected to have a wide variety of interesting properties. Capillarity in open tubes has already been demonstrated2–5, while predictions regarding their electronic structure6–8 and mechanical strength9 remain to be tested. To examine the properties of these structures, one needs tubes with well defined morphologies, length, thickness and a number of concentric shells; but the normal carbon-arc synthesis10,11 yields a range of tube types. In particular, most calculations have been concerned with single-shell tubes, whereas the carbon-arc synthesis produces almost entirely multi-shell tubes. Here we report the synthesis of abundant single-shell tubes with diameters of about one nanometre. Whereas the multi-shell nanotubes are formed on the carbon cathode, these single-shell tubes grow in the gas phase. Electron diffraction from a single tube allows us to confirm the helical arrangement of carbon hexagons deduced previously for multi-shell tubes1.

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7,528 citations


Journal ArticleDOI
Meryl D. Stoller1, Sungjin Park1, Yanwu Zhu1, Jinho An1  +1 moreInstitutions (1)
13 Sep 2008-Nano Letters
TL;DR: CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.

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Abstract: The surface area of a single graphene sheet is 2630 m2/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. Our group has pioneered a new carbon material that we call chemically modified graphene (CMG). CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here we demonstrate in an ultracapacitor cell their performance. Specific capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively, have been measured. In addition, high electrical conductivity gives these materials consistently good performance over a wide range of voltage scan rates. These encouraging results illustrate the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.

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6,912 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2022216
20215,842
20206,521
20197,553
20187,151
20176,171

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Topic's top 5 most impactful authors

Jieshan Qiu

86 papers, 3.1K citations

Teresa J. Bandosz

85 papers, 5.3K citations

Sumio Iijima

80 papers, 8.1K citations

Yury Gogotsi

75 papers, 6.4K citations

Takashi Kyotani

62 papers, 4K citations