Sorption of ⁴He, H₂, Ne, N₂, CH₄, and Kr impurities in graphene oxide at low temperatures. Quantum effects

• Дата: 2013
• Автори: Dolbin, A.V., Esel'son, V.B., Gavrilko, V.G., Manzhelii, V.G., Vinnikov, N.A., Basnukaeva, R.M., Danchuk, V.V., Mysko, N.S., Bulakh, E.V., Maser, W.K., Benito, A.M.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2013
• Назва видання: Физика низких температур
• Теми: Наноструктуры при низких температурах
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/118925
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Sorption of ⁴He, H₂, Ne, N₂, CH₄, and Kr impurities in graphene oxide at low temperatures. Quantum effects / A.V. Dolbin, V.B. Esel'son, V.G. Gavrilko, V.G. Manzhelii , N.A. Vinnikov, R.M. Basnukaeva, V.V. Danchuk, N.S. Mysko, E.V. Bulakh, W.K. Maser, A.M. Benito // Физика низких температур. — 2013. — Т. 39, № 12. — С. 1397–1404. — Бібліогр.: 48 назв. — англ.

Sorption and the subsequent desorption of ⁴He, H₂, Ne, N₂, CH₄, and Kr gas impurities by graphene oxide(GO), glucose-reduced GO (RGO-Gl) and hydrazine-reduced GO (RGO-Hz) powders have been investigated in the temperature interval 2–290 K. It has been found that the sorptive capacity of the reduced sample RGO-Hz is three to six times higher than that of GO. The reduction of GO with glucose has only a slight effect on its sorptive properties. The temperature dependences of the diffusion coefficients of the GO, RGO-Gl and RGO-Hz samples have been obtained using the measured characteristic times of sorption. It is assumed that the temperature dependences of the diffusion coefficients are determined by the competition of the thermally activated and tunneling mechanisms, the tunneling contribution being dominant at low temperatures.