Intercalation of potassium in graphite studied by thermal desorption spectroscopy |
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| Institution: | 1. Department of Environmental Health Engineering, Faculty of Health, Jiroft University of Medical Sciences, Jiroft, Iran;2. Kurdistan Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran;3. Department of Chemical and Biochemical Engineering, Western University, London, ON N6A 5B9, Canada;4. College of Science and Management, University of Northern British Columbia, Prince George, BC, Canada;5. Department of Civil Engineering, Isra University, Amman, Jordan;6. Faculty of Health, Students Research Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran |
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| Abstract: | Thermal desorption spectra obtained after multilayer potassium depositions on graphite at Ts = 160 K reveal information about the formation and decomposition of potassium/graphite intercalation structures. Up to six desorption peaks were observed, of which three could be attributed to decomposition of three different intercalation-like surface structures. These structures are formed as the deposited potassium diffuses into the graphite substrate during the recording of the thermal desorption spectra. At submonolayer coverages, potassium desorbs in a sharp peak around 500 K, attributed to decomposition of a single intercalated potassium layer positioned between the two uppermost graphite layers. |
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