Quantum spin dynamics

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Selective host–guest interaction of single-walled carbon nanotubes with functionalised fullerenes

Chemical Communications 4:2 (2004) 176-177

Authors:

DA Britz, AN Khlobystov, J Wang, AS O’neil, M Poliakoff, A Ardavan, GAD Briggs

Abstract:

Exohedrally functionalised fullerenes have been inserted in single-walled carbon nanotubes (SWNTs) with the aid of supercritical carbon dioxide to form peapods; C61(COOEt)2 are encapsulated in SWNTs in high yield, whereas C61(COOH)2 aggregate via hydrogen bonding to form a supramolecular complex, which sterically hinders encapsulation and causes it to adhere to the exterior surface of the SWNTs. © 2004 The Royal Society of Chemistry.
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Controlled orientation of ellipsoidal fullerene C70 in carbon nanotubes

APPLIED PHYSICS LETTERS 84:5 (2004) 792-794

Authors:

AN Khlobystov, R Scipioni, D Nguyen-Manh, DA Britz, DG Pettifor, GAD Briggs, SG Lyapin, A Ardavan, RJ Nicholas
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Experimental demonstration of emission from a superluminal polarization current - a new class of solid-state source for MHz-TRz and beyond

(2004) 591-592

Authors:

J Singleton, A Ardavan, H Ardavan, J Fopma, D Halliday, W Hayes

Abstract:

We describe the Polarization Synchrotron, an experimental implementation of a superluminal (faster than light in vacuo) polarization current distribution that both oscillates and undergoes centripetal acceleration. The prototype machine produces tightly-beamed monochromatic radiation in the 100s of MHz range. The technique should also have applications as a broad-band GHz-THz source.
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Experimental observation of nonspherically-decaying radiation from a rotating superluminal source (vol 96, pg 4614, 2004)

JOURNAL OF APPLIED PHYSICS 96:12 (2004) 7760-7777

Authors:

A Ardavan, W Hayes, J Singleton, H Ardavan, J Fopma, D Halliday
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Inserting fullerene dimers into carbon nanotubes: Pushing the boundaries of molecular self-assembly

AIP CONF PROC 723 (2004) 255-258

Authors:

K Porfyrakis, AN Khlobystov, DA Britz, JJL Morton, A Ardavan, M Kanai, TJS Dennis, GAD Briggs

Abstract:

Carbon nanotubes can encapsulate several molecular species forming one-dimensional crystals. Using previously reported methods we produced directly-bonded, asymmetric C-60-C-70 dimers and oxygen-bridged dimers of the type C-60-O-C-60, We present here microscopic evidence of filling single-waited carbon nanotubes (SWNTs) with the above fullerene dimers. The most important filling constraint is found to be the nanotube size. SWNTs with diameters around 1.6 nm incorporate dimers; considerably more easily than SWNTs with smaller diameters. This kind of molecular self-assembly opens up the potential for using nanotubes and fullerenes for nanodevices.
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