Raman Scattering Cross Section of Confined Carbyne

Abstract

We experimentally quantify the Raman scattering from individual carbyne chains confined in double-walled carbon nanotubes. We find that the resonant differential Raman cross section of confined carbyne is on the order of 10 −22 cm 2 sr −1 per atom, making it the strongest Raman scatterer ever reported.

Isotopic Labelling of Confined Carbyne

“…[37] Here again, the table in Figure 3, shows the CCM peak shifts and the calculated 13 C-incorporation ratio of C1-C5 calculated by the Raman frequencies. [27] These 13 C-incorporation ratios in the CCs synthesized from the 13 C- methanol are 5 to 12 times greater than those found in the CCs made with natural isotope. Surprisingly, the 13 C-incorporation ratio for confined carbyne with small excitonic gaps is higher than the ratio observed on CC with large excitonic gaps.…”

“…We report here how large sections of 13 C-isotopes in a CC confined to single-walled CNTs (SWCNTs) can take shape by using 13 C-methanol as precursor. Around 11.9 % 13 C labelling has been achieved and this is a solid step towards tailored carbyne with designed functionality.…”

“…q , where n and n 0 are the frequencies of CCM with or without isotope labelling, respectively, and c 0 = 0.011 is the natural abundance of 13 C in carbon materials. [37] Here again, the table in Figure 3, shows the CCM peak shifts and the calculated 13 C-incorporation ratio of C1-C5 calculated by the Raman frequencies.…”

“…q , where n and n 0 are the frequencies of CCM with or without isotope labelling, respectively, and c 0 = 0.011 is the natural abundance of 13 C in carbon materials. [37] Here again, the table in Figure 3, shows the CCM peak shifts and the calculated 13 C-incorporation ratio of C1-C5 calculated by the Raman frequencies. [27] These 13 C-incorporation ratios in the CCs synthesized from the 13 C- methanol are 5 to 12 times greater than those found in the CCs made with natural isotope.…”

“…Those results place carbyne in an exceptional position for experiments that rely on the strong interaction between light and vibrational modes enabling a new scope of applications, such as sensors and biodetection tracers. [13] Although making stable carbyne in high yield has been the focus of a century of research, its high reactivity is responsible for its limited stability. This inspired the use of carbon nanotubes (CNTs) as nanoreactors to grow CC protected inside their hollow core.…”