Heavy-to-light electron transition enabling real-time spectra detection of charged particles by a biocompatible semiconductor.

ABSTRACT: The current challenge of wearable/implantable personal dosimeters for medical diagnosis and radiotherapy applications is lack of suitable detector materials possessing both excellent detection performance and biocompatibility. Here, we report a solution-grown biocompatible organic single crystalline semiconductor (OSCS), 4-Hydroxyphenylacetic acid (4HPA), achieving real-time spectral detection of charged particles with single-particle sensitivity. Along in-plane direction, two-dimensional anisotropic 4HPA exhibits a large electron drift velocity of 5 × 10⁵cm s^-1 at "radiation-mode" while maintaining a high resistivity of (1.28 ± 0.003) × 10¹² Ω·cm at "dark-mode" due to influence of dense π-π overlaps and high-energy L1 level. Therefore, 4HPA detectors exhi

SUBMITTER: Zhao D 

PROVIDER: S-EPMC10847108 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature