Laser raman studies on carbons

✍ Scribed by M. Nakamizo; R. Kammereck; P.L. Walker Jr.

• Book ID: 102999692
• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 663 KB
• Volume: 12
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(74)90068-2

✦ Synopsis

Laser

Raman spectra were studied of natural graphite (SP-1) and carbonaceous materials including pyrolytic graphite, carbon black, glassy carbon, coal, "white" carbon and sputtered carbon. All of these carbons have two Raman bands at 1580 cm ' and 1360 cm-', except for natural graphite which has a single sharp Raman band at 1580 cm-'. The relative intensity of the 1360 cm-' band to the 1580 cm-' band and the half band width increase going from graphite through glassy carbon to carbon black. The 1360 cm-' band in glassy carbon becomes sharper and stronger with the increase of heat-treatment temperature (HTT), while the addition of iron to the glassy carbon matrices results in a decrease in intensity and half band width of this band with increasing HTT and iron content. Sputtered carbon and "white" carbon, prepared from graphite irradiated by a high power laser, showed an additional broad band around 2140cm-'. This band is believed to originate from conjugated acetylenic bands (-C=C-),,.