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 2 Gy. 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.
Graphite ion chambers and semiconductor diode detectors have been used to make measurements inphantoms 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 nanotubeshave properties that potentially meet the demand, requiring low voltage in active devices and anatomic number similar to adipose tissue. In this study, single-wall carbon nanotubes (SWCNTs) buckypaperhas been used to measure the beta particle dose deposited from a strontium-90 source, themedium displaying thermoluminescence at potentially useful sensitivity. As an example, the samplesshow a clear response for a dose of 2 Gy. This finding suggests that carbon nanotubes can be used as apassive 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 minimalcapacitance.
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