Počet záznamů: 1
Small-field dosimetry based on reduced graphene oxide under MeV helium beam irradiation
- 1.
SYSNO ASEP 0523740 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Small-field dosimetry based on reduced graphene oxide under MeV helium beam irradiation Tvůrce(i) Torrisi, L. (IT)
Cutroneo, Mariapompea (UJF-V) ORCID, RID, SAI
Torrisi, Alfio (UJF-V) RID, ORCID
Silipigni, L. (IT)
Havránek, Vladimír (UJF-V) RID, SAI, ORCIDCelkový počet autorů 5 Zdroj.dok. Radiation Effects and Defects in Solids. - : Taylor & Francis - ISSN 1042-0150
Roč. 175, 1-2 (2020), s. 120-135Poč.str. 16 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova dosimeter ; reduced graphene oxide ; helium ion beam ; Gy dose Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače Obor OECD Nuclear physics CEP LM2015056 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GBP108/12/G108 GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UJF-V - RVO:61389005 UT WOS 000517368700012 EID SCOPUS 85081032007 DOI 10.1080/10420150.2020.1718137 Anotace A new type of ion dosimeter based on graphene oxide (GO) foils is presented and discussed. GO is biocompatible, stable, tissue equivalent and has special chemical and physical properties. The ion irradiation reduces the material thanks to the breaking of oxygen functional groups bonded to the carbon matrix and to the consequent their desorption. The reduction effect increases the carbon-to-oxygen atomic ratio and transforms the pristine insulator GO into the semiconductive reduced GO (rGO). The reduction increases with the ion dose making the material more electrically conductive, decreasing its band gap and making it denser. At high doses of 2 MeV helium beam irradiation, the electrical conductivity increases linearly with the ion fluence for values within 10(11) and 5 x 10(14) ions/cm(2), corresponding to absorbed doses of 25.9 kGy and 129.55 MGy, respectively. The results indicate that this material reduction is controllable through the desorption of oxygen groups and absorbed hydrogen, by the increment of the electrical conductivity and by the surface roughness, all these parameters depending on the absorbed dose by the material, which can be a good candidate to realise small ion dosimeters, especially to be used in the small-field dosimetry. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2021 Elektronická adresa https://doi.org/10.1080/10420150.2020.1718137
Počet záznamů: 1