title: Carbon nanotubes buckypaper radiation studies for medical physics applications.
abstract: Graphite ion chambers and semiconductor diode detectors have been used to make measurements in phantoms but these active devices represent a clear disadvantage when considered for in vivo dosimetry. In such circumstance, dosimeters with atomic number similar to human tissue are needed. Carbon nanotubes have properties that potentially meet the demand, requiring low voltage in active devices and an atomic number similar to adipose tissue. In this study, single-wall carbon nanotubes (SWCNTs) buckypaper has been used to measure the beta particle dose deposited from a strontium-90 source, the medium displaying thermoluminescence at potentially useful sensitivity. As an example, the samples show a clear response for a dose of 2Gy. This finding suggests that carbon nanotubes can be used as a passive dosimeter specifically for the high levels of radiation exposures used in radiation therapy. Furthermore, the finding points towards further potential applications such as for space radiation measurements, not least because the medium satisfies a demand for light but strong materials of minimal capacitance.
authors.affiliation: Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK; Medical Physics Department, Cancer Centre, Prince Mohammed Medical City, P.O. Box: 2254, Sakaka Aljouf 42421, Saudi Arabia. Electronic address: a.alanazi@surrey.ac.uk.
authors.forename: Abdulaziz
authors.initials: A
authors.lastname: Alanazi
authors.affiliation: Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK; Department of Radiological Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia. Electronic address: malkhorayef@KSU.EDU.SA.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Alkhorayef
authors.affiliation: Department of Radiological Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia. Electronic address: Kalzimami@ksu.edu.sa.
authors.forename: Khalid
authors.initials: K
authors.lastname: Alzimami
authors.affiliation: Department of Physics, Faculty of Eng & Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK. Electronic address: Izabela.Jurewicz@surrey.ac.uk.
authors.forename: Izabela
authors.initials: I
authors.lastname: Jurewicz
authors.affiliation: Diagnostic radiology department, Faculty of medical applied sciences, Jazan University, P. O. Box 114, Jazan, Saudi Arabia. Electronic address: n_pasint@hotmail.com.
authors.forename: Nouf
authors.initials: N
authors.lastname: Abuhadi
authors.affiliation: Department of Physics, Faculty of Eng & Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK. Electronic address: A.Dalton@surrey.ac.uk.
authors.forename: Alan
authors.initials: A
authors.lastname: Dalton
authors.affiliation: Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK; Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: D.A.Bradley@surrey.ac.uk.
authors.forename: D A
authors.initials: DA
authors.lastname: Bradley
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry* / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006283:Health Physics / Q000295:instrumentation / Q000379:methods; D008422:Materials Testing; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects*; D010209:Paper; D011829:Radiation Dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods
chemical_list: D037742:Nanotubes, Carbon
keywords: Carbon nanotubes; Radiation therapy; Thermoluminescence