Energetic deuterium and helium irradiation effects on chemical structure of CVD diamond

Thermal desorption behavior of deuterium implanted into polycrystalline diamond

“…It has been reported that deuterium desorption process in the temperature region 700 to 1100 K would be attributed to detrapping from the trapping site where deuterium could interact strongly with carbon in HOPG. The deuterium desorption was resulted from the breaking bond of sp 3 C-D [8,9]. Deuterium implanted into diamond could form sp 3 C-D as reported in a previous paper [8].…”

“…The deuterium desorption was resulted from the breaking bond of sp 3 C-D [8,9]. Deuterium implanted into diamond could form sp 3 C-D as reported in a previous paper [8]. These are the reasons why the deuterium desorption in the lower temperature region from diamond would be attributed to the detrapping caused by the breaking bond of sp 3 C-D.…”

“…From the results, the C 1s peak was found to shift towards lower energy with heating at more than 773 K. After heating at 1173 K and 1333 K, it was observed that a new peak appeared in the higher energy side of the C 1s peak. The diamond structure was disordered by ion implantation, with forming vacancies, sp 2 C-C and sp 3 C-D bonds [8]. The desorption of deuterium implanted into the diamond and the formation of local sp 2 C-C bonds occurred simultaneously by heating.…”

Effects of chemical states of carbon on deuterium retention in carbon-containing materials

“…In our previous studies, chemical behavior of energetic hydrogen isotopes in carbon-containing materials such as highly oriented pyrolytic graphite (HOPG), poly-crystalline diamond, poly-crystalline silicon carbide (SiC), and sintered tungsten carbide [3,4,[6][7][8][9][10].…”