Nondispersive Raman lines in the D‐band region for ferrocene functionalized carbon nanotubes. Issue 12 (8th October 2014)

• Record Type: Journal Article
• Authors: Kuzmany, H.; Shi, L.; Pichler, T.; Kramberger, C.; Chernov, A.; Liu, X.
• Is Part Of: Physica status solidi. Volume 251:Issue 12(2014:Dec.)
• Page Start: 2457
• Page End: 2460
• Publication Date: 2014-10-08
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201451214
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssb201451214-sec-0001" sec-type="section"> <p>Carbon‐rich fillers like ferrocene can be transformed into an inner tube with extremely small diameter if they are filled into HiPco tubes. For ferrocene@HiPco three new Raman bands appear in the D‐band region during this transformation. These bands do not show dispersion and exhibit a strong resonance for red laser excitation. The observed resonance is for the outgoing phonon at 1247 cm<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgh2jcbg30d" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssb201451214:pssb201451214-math-0001" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:math></alternatives></inline-formula> for an electronic transition at 1.84 eV. Maximum response for the new lines is observed for transformation of the filled tubes between 800 and 900<sup>°</sup>C. In addition to the three bands in the D‐band region also an enhanced band at 470 cm<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgh2jcbg2qg" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssb201451214:pssb201451214-math-0002" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:math></alternatives></inline-formula> is observed with the same sensitivity to transformation temperature. In order to obtain more information on the origin of the new bands deuterium substituted FeCp<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgh2jcbg2t4" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:15213951:media:pssb201451214:pssb201451214-math-0003" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math></alternatives></inline-formula> was used. The new lines turned out to be sensitive to this substitution which is considered as a strong indication of their origin from organic compounds created inside or in between the tubes during the transformation process.</p> </sec> </abstract>