Growth of Long Linear Carbon Chains after Serious Field Emission from a CNT Film

Abstract

Carbyne is a long one-dimensional chain of sp-hybridized carbon atoms and is known as one of the allotropes of carbon. Mechanical and electrical properties of carbyne expected from theoretical studies have attracted much interest because of many promising applications to advance nanotechnology and nanoscience, and much effort has been dedicated to the synthesis of carbyne. This chapter describes Raman spectroscopy and electron microscopy of the long linear carbon chains generated by field electron emission of SWCNT films. The presence of long linear carbon chins in the damaged regions of the SWCNT films after electrical discharge can be recognized by high-resolution transmission electron microscopy. Resonant Raman scattering of the L band for the long linear carbon chain occurs when the excitation energy is close to the band gap of the long linear carbon chain.