Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 37, Pages 42403-42409Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c12234
Keywords
gamma radiation; gold nanoparticle; DNA; nanosensor; surface plasmon resonance; radiation dosimeter
Funding
- National Natural Science Foundation of China [11575086, 11775115]
- Fundamental Research Funds for the Central Universities [NP2015207]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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It is very important to control the ionizing radiation dose in radiation therapy, which depends on the accurate and rapid measurement of radiation. Herein, a novel and highly sensitive nanosensor for gamma-radiation detection is constructed using single-stranded DNA sequences as radiation-sensitive material and gold nanoparticles (AuNPs) as a signal reporter. Well-dispersed AuNPs gradually aggregated at high salt concentration when the sensor was irradiated, and this change was quantified by the visible spectra and surface plasmon resonance spectra. The radiation nanosensor has excellent linearity in the dose range of 0-100 Gy under optimal conditions. This method is simple and fast, which provides a new path for the gamma-radiation dosimeter and has potential applications in the assessment of radiation-induced biological effects.
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