Optical properties of carbon microcoils

Abstract

Carbon microcoils (CMCs) have emerged as versatile material artifacts for a variety of applications due to their helical and spiral structures. Embedded in matrix, CMCs have already been demonstrated for their potential tactile/proximity sensor application. In this study, CMCs were prepared using a conventional chemical vapor deposition method, and then were functionalized with octadecylamine. Upon photoexcitation, the functionalized CMCs exhibited photoluminescence in the visible region, which has never been found before. Similar to carbon based nanoparticles, the photoluminescence of CMCs was attributed to electron-hole radiative recombination after surface passivation. The results suggested that this kind of fluorescent functionalized CMCs might be used as a promising class of optical agents for biological applications.

Growth and Properties of Carbon Microcoils and Nanocoils

“…Hikita et al [66] reported an optical property of octadecylamine (ODA) functionalized CMCs. As shown in Figure 24, ODA functionalized CMCs emitted fluorescent light with a peak of ~423 nm using a 350 nm excitation light source.…”

“…This occurred by passivation on the surface of the CMC turbostratic structure with ODA [66]. [66]. Reprinted with permission from [66], Copyright 2014 AIP Publishing LLC.…”

“…As shown in Figure 24, ODA functionalized CMCs emitted fluorescent light with a peak of ~423 nm using a 350 nm excitation light source. This occurred by passivation on the surface of the CMC turbostratic structure with ODA [66]. [66].…”