Počet záznamů: 1  

Counting graphene layers with very slow electrons

  1. 1. 0443322 - UPT-D 2016 RIV US eng J - Článek v odborném periodiku
    Frank, Luděk - Mikmeková, Eliška - Müllerová, Ilona - Lejeune, M.
    Counting graphene layers with very slow electrons.
    Applied Physics Letters. Roč. 106, 09 JAN (2015), 013117:1-5. ISSN 0003-6951
    Grant CEP: GA TA ČR(CZ) TE01020118; GA MŠk(CZ) LO1212
    Institucionální podpora: RVO:68081731
    Klíčová slova: graphene * ultralow energy STEM * counting graphene layers * cleaning of graphene * 2D crystals
    Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika
    Impakt faktor: 3.142, rok: 2015

    The study aimed at collection of data regarding the transmissivity of freestanding graphene for electrons across their full energy scale down to the lowest energies. Here, we show that the electron transmissivity of graphene drops with the decreasing energy of the electrons and remains below 10 percent for energies below 30 eV, and that the slow electron transmissivity value is suitable for reliable determination of the number of graphene layers. Moreover, electrons incident below 50 eV release adsorbed hydrocarbon molecules and effectively clean graphene in contrast to faster electrons that decompose these molecules and create carbonaceous contamination.
    Trvalý link: http://hdl.handle.net/11104/0246044