Radiation hardness of 6H silicon carbide (SiC) p+n diode particle detectors has been studied. The charge collection efficiency (CCE) of the detectors decreases with the increased fluence of electrons with energies of 0.2 MeV and higher. Defect X2 with an activation energy of 0.5 eV was found in all detectors which showed the decreased CCE. The decreased CCE was restored to the initial value by thermal annealing of defect X2. It is concluded that defect X2 is responsible for the decreased CCE of 6H-SiC p+n diode particle detectors.
The germanium (Ge) films of nanostructures deposited at 300 and 77 K by the cluster-beam evaporation technique are found to consist of small nanostructures. The crystal structure of the films is not the ordinary diamond but tetragonal structure. The Ge film deposited at 77 K exhibits photo-oxidation and blue-light emission when it is exposed to UV light. It may be said that the material possesses an ability to sense the environment and change in response to a change in the environment, which is one of the functions of intelligent materials. It, however, never restores itself even if an external stimulus (UV light in this case) is removed. Nevertheless, because of the unique crystal structure and optical properties of the Ge films, there is a possibility that further study may reveal their potential for intelligent materials.
Conference Committee Involvement (1)
Micro- and Nanotechnology Sensors, Systems, and Applications V
29 April 2013 | Baltimore, Maryland, United States
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.