Density of fullerene containing soot as determined by helium pycnometry

✍ Scribed by R.S. Ruoff; T. Thornton; D. Smith

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 244 KB
• Volume: 186
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)90208-q

✦ Synopsis

Mass-spcctrometric techniques have demonstrated the presence of carbon clusters Czn with n as high as 300, in carbon soot material produced using the "arc-synthesis" method. While new techniques are being explored for solvation of larger fullerene cages, beyond the more conventional solvation of the "smaller" fullerene molecules such as CeO and C,,,, the question arises: how much of the soot is fullerene cage molecules? One expects the density of fullerene soot composed of, say, CzN and larger cages, to be significantly less than graphite, 2.2670 g cm-), and also less than C,,, 1.65 g cmm3. The helium pycnometry determined density of a sample of commercially available raw "fullerene" soot is 1.565 1 g cmm3. It is likely that this is an upper bound to the density, due to permeation by helium resulting from the large size of some fullerenes present in the soot.