Raman depolarization ratio of vibrational modes in solid C60

Abstract

We studied the dependence of the Raman depolarization ratio in a C 60 /C 70 film within the temperature interval 20-300 K. The experimentally determined RDR is compared with that expected from the corresponding Raman tensors for the low-(s.c.) and high-(f.c.c.) temperature phase of solid C 60 . We demonstrate that RDR can be successfully used for detection of subtle C 60 -mode-splitting in insufficiently resolved spectra. ᭧

Raman Spectroscopic Study of As-Deposited and Exfoliated Defected Graphene Grown on (001) Si Substrates by CVD

“…The strong modes of fullerenes C 70 at about 1180 and 1568 cm −1 are merged with D" and G bands. The Raman spectra ( Figure 6) taken from points 2 and 3 ( Figure 1(c)) are similar as they contain the most prominent modes of C 70 peaks at 1160, 1220, 1454, 1526, and 1565 cm −1 [25,26], nanodiamond (Nd) peaks at 1330 and 1620 cm −1 (see [27]), and turbostratic graphite. The D, G, and D' bands are found at 1335, 1590, and 1612 cm −1 , respectively, but in a different proportion: the spectrum from point 3 is dominated Journal of Spectroscopy by the peaks of C 70 and Nd while the spectrum from point 2 is dominated by turbostratic graphite (see Figure 6).…”

“…The D, G, and D' bands are found at 1335, 1590, and 1612 cm −1 , respectively, but in a different proportion: the spectrum from point 3 is dominated Journal of Spectroscopy by the peaks of C 70 and Nd while the spectrum from point 2 is dominated by turbostratic graphite (see Figure 6). It should be also remarked that features of C 60 fullerenes (see, e.g., [25,26]) were not observed.…”

“…The remaining interlayers have different optical contrasts (see Figure 1(c)) and Raman spectra: the spectrum of typically retained interlayer (point 1 in Figure 1(c)) in Figure 5 is very similar to that of turbostratic graphite (see [24]), but weak peaks of C 70 fullerenes (the features observed at about 1450 and 1530 cm −1 (see [25,26])) are also clearly distinguished ( Figure 5). The strong modes of fullerenes C 70 at about 1180 and 1568 cm −1 are merged with D" and G bands.…”

Surface-Enhanced Raman Scattering of C60 and C70 in Gold Hydrosols

“…As promising functional materials, C 60 and C 70 molecules have been paid extensive attention, especially in the form of thin films. − Properties of a thin film are mainly determined by its interface configuration and adsorption pattern. − Because surface-enhanced Raman scattering (SERS) uses photons as probes, which results in high-sensitivity spectra without damage to samples, revealing rich information concerning the interactions between adsorbate and base, it has become an important method of in situ investigation of thin films and interfaces. − Hydrosolution should be an ideal circumstance for this purpose, because water has no significant Raman band in the concerned range. Many Raman studies on C 60 and C 70 have been reported, while reports of SERS studies are dramatically rare. − A very important reason is that these two molecules have poor solubility in water.…”

Guest‐Host Raman under Liquid Nitrogen Spectroscopy for the Acquisition of Improved Vibrational Spectra of Solids

“…Here, we demonstrate this method on C 60 , Buckminsterfullerene encapsulated in a matrix of water ice (Figure 1) and propose a mechanism for the resulting spectral enhancement. C 60 has been studied in low‐temperature environments in the past, and most theoretically predicted perturbations to its vibrational spectrum have been observed experimentally [12–21] . Intrinsic disorder, however, within the low temperature simple cubic lattice has hidden mode splittings and certain Raman activity [13] .…”