title: A novel nanometric DNA thin film as a sensor for alpha radiation.
abstract: The unexpected nuclear accidents have provided a challenge for scientists and engineers to develop sensitive detectors, especially for alpha radiation. Due to the high linear energy transfer value, sensors designed to detect such radiation require placement in close proximity to the radiation source. Here we report the morphological changes and optical responses of artificially designed DNA thin films in response to exposure to alpha radiation as observed by an atomic force microscope, a Raman and a reflectance spectroscopes. In addition, we discuss the feasibility of a DNA thin film as a radiation sensing material. The effect of alpha radiation exposure on the DNA thin film was evaluated as a function of distance from an ²⁴¹Am source and exposure time. Significant reflected intensity changes of the exposed DNA thin film suggest that a thin film made of biomolecules can be one of promising candidates for the development of online radiation sensors.
authors.affiliation: Sungkyunkwan Advanced Institute of Nanotechnology-SAINT, Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Atul
authors.initials: A
authors.lastname: Kulkarni
authors.forename: Byeonghoon
authors.initials: B
authors.lastname: Kim
authors.forename: Sreekantha Reddy
authors.initials: SR
authors.lastname: Dugasani
authors.forename: Pranav
authors.initials: P
authors.lastname: Joshirao
authors.forename: Jang Ah
authors.initials: JA
authors.lastname: Kim
authors.forename: Chirag
authors.initials: C
authors.lastname: Vyas
authors.forename: Vijay
authors.initials: V
authors.lastname: Manchanda
authors.forename: Taesung
authors.initials: T
authors.lastname: Kim
authors.forename: Sung Ha
authors.initials: SH
authors.lastname: Park
mesh_terms: D000512:Alpha Particles; D015374:Biosensing Techniques; D004247:DNA / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D013059:Spectrum Analysis, Raman
chemical_list: D004247:DNA