Selective photon-breaking of C-S bonds in polythiophene to form quasi-one-dimensional carbon chains in cubic nanocrystals

ZhongMin Ren; Yongfeng Lu; H. W. Choy; Tow Chong Chong; S. C. Ng; P. Miao

doi:10.1117/12.456811

25 February 2002 Selective photon-breaking of C-S bonds in polythiophene to form quasi-one-dimensional carbon chains in cubic nanocrystals

ZhongMin Ren, Yongfeng Lu, H. W. Choy, Tow Chong Chong, S. C. Ng, P. Miao

Author Affiliations +

Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456811
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore

Abstract

A solid polythiophene pellet was ablated by a KrF excimer laser beam to deposit thin films on silicon substrates. The laser-ablated plasma was studied by optical emission spectroscopy to identify the photon-breaking of C-S bonds in the ablated heterocycles. The selective photon-induced bond breaking was also supported by Raman and X-ray photoelectron spectroscopy measurements of the deposited thin films. The thin films appeared to be composed of cubic nanocrystals with an uniform size of 240 nm. X-ray diffraction measurement determined the cubic crystal structures with a lattice constant of aequals 3.38angstrom and suggested a quasi-one-dimensional carbon chain structure along the body diagonal of the cube.

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ZhongMin Ren, Yongfeng Lu, H. W. Choy, Tow Chong Chong, S. C. Ng, and P. Miao "Selective photon-breaking of C-S bonds in polythiophene to form quasi-one-dimensional carbon chains in cubic nanocrystals", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); https://doi.org/10.1117/12.456811

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