High performance NEMS ultrahigh sensitive radiation sensor based on platinum nanorods capacitor

Abstract

A novel NEMS radiation sensor optimized for ultrahigh sensitive and isotropic detection of gamma irradiation is presented. The sensor is designed as a 3D symmetrical array of nanostructured platinum nanorod capacitor with 20 to 50 nm silicon oxide dielectric layer and a surface to volume ratio magnified by a factor of 5 × 10 3 to 8 × 10 5 as compared to bulk capacitor electrodes. For wide range gamma radiation doses from 5 to 35 kG using a Co 60 source in the ±90° angle range, the detected sensitivity is evaluated in the range of 800 nf/G compared to 1.1 pf/G for conventional bulk capacitive sensors, a factor of ~ 8 × 10 5 improvement.

Monolayer Graphene Radiation Sensor with Backend RF Ring Oscillator Transducer

“…In addition, semiconductor-based solid-state radiation sensors are widely used because they can generate numerous electron–hole pairs in response to incident radiation generated at low photon or particle energies, compared to conventional scintillators [ 15 ]. Solid-state radiation sensors and the materials used in them can be classified into two main classes: single detectors, which are mainly fabricated using silicon, germanium, or metals (e.g., platinum) and compound detectors, containing at least two elements (e.g., thallium bromide or thallium gallium selenide), which were proposed because Si and Ge single detectors need low temperatures to work efficiently at low noise levels [ 16 , 17 , 18 ].…”