title: Characteristics of X-ray attenuation in electrospun bismuth oxide/polylactic acid nanofibre mats.
abstract: The characteristics of the X-ray attenuation in electrospun nano(n)- and micro(m)-Bi2O3/polylactic acid (PLA) nanofibre mats with different Bi2O3 loadings were compared as a function of energy using mammography (i.e. tube voltages of 22-49 kV) and X-ray absorption spectroscopy (XAS) (7-20 keV). Results indicate that X-ray attenuation by electrospun n-Bi2O3/PLA nanofibre mats is distinctly higher than that of m-Bi2O3/PLA nanofibre mats at all energies investigated. In addition, with increasing filler loading (n-Bi2O3 or m-Bi2O3), the porosity of the nanofibre mats decreased, thus increasing the X-ray attenuation, except for the sample containing 38 wt% Bi2O3 (the highest loading in the present study). The latter showed higher porosity, with some beads formed, thus resulting in a sudden decrease in the X-ray attenuation.
authors: Department of Imaging and Applied Physics, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.
authors: Nurul Z
authors: NZ
authors: Noor Azman
authors: Salim A
authors: SA
authors: Siddiqui
authors: Hazim J
authors: HJ
authors: Haroosh
authors: Hani M M
authors: HM
authors: Albetran
authors: Bernt
authors: B
authors: Johannessen
authors: Yu
authors: Y
authors: Dong
authors: It M
authors: IM
authors: Low
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D008327:Mammography; D057139:Nanofibers; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D011835:Radiation Protection / Q000295:instrumentation*; D056928:X-Ray Absorption Spectroscopy; D014965:X-Rays
chemical_list: D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); C033301:bismuth oxide; D001729:Bismuth
keywords: X-ray attenuation; electrospun micro-Bi2O3/PLA nanofibre mat; electrospun nano-Bi2O3/PLA nanofibre mat; micro-Bi2O3/PLA thin films; nano-Bi2O3/PLA thin films; porosity