Research Progress of Radio-photoluminescence Materials and Their Applications

Abstract

With the progress of nuclear radiation technology in China, radiation detection has been developed rapidly in recent years, which is widely used in radiation safety monitoring, radioactive medicine diagnosis and treatment, X-ray security inspection system, industrial non-destructive detection, microscopic particle track detection and many other fields. As a new radiation detection method, radio-photoluminescence (RPL) is a phenomenon in which a new luminescence center is generated inside a material under the ionizing radiation and is excited by ultraviolet light to emit light. RPL materials usually have the characteristics of storing radiation information, almost no attenuation of information, good linear dose response, high radiation 无 机 材 料 学 报 sensitivity, low energy dependence and repeatable reading, which make up for the shortcomings of optically stimulated luminescence (OSL) materials and thermally stimulated luminescence (TSL) materials in storage stability and reusability. Since the RPL phenomenon was reported, RPL materials have emerged one after another, from the traditional materials as Ag-doped phosphate glass, Al2O3:C,Mg and LiF, to the novel materials as Cu-doped RPL system, Sm-doped RPL system and undoped RPL system materials, et al. Meanwhile, the applications of RPL materials have also been explored. RPL materials have become one of the indispensable materials in the field of radiation detection. Based on this, this paper summarizes the latest development of RPL materials, focuses on the luminescence principle, performance characteristics and applications of traditional & novel RPL materials. It especially compares the performance of different RPL materials in radiation detection. Finally, the advantages and disadvantages of RPL materials are summarized and analyzed. And also the development trend of RPL materials is prospected.

Biocompatibility of Membranes Based on a Mixture of Chitosan and Lythri herba Aqueous Extract

“…This evaluation highlighted hemolysis ratio values of all tested samples that were lower than the 5% recommended by the general standard for hemocompatibility materials. According to the ASTM standard F756, a hemoglobin release of 0-2%, 2-5% or >5% of the total release is classified as non-hemolytic, slightly hemolytic or hemolytic, respectively [87]. Chitosan, in blood contact processes, involves erythrocyte aggregation, platelet activation, the contact activation pathway and the formation of the space net structure.…”

(Invited) Preparation of N-Type and P-Type Doped Single Crystal Diamonds with Laser-Induced Doping and Microwave Plasma Chemical Vapor Deposition

“…MPCVD provides a highly repeatable and uniform boron-doped homoepitaxial growth process for diamond. Through MPCVD synthesis, lightly boron-doped diamond with a room-temperature carrier mobility of approximately 1000 cm 2 /(V ⋅ s) can be readily obtained (20,21). However, due to the highly explosive and toxic nature of borane and trimethyl boron (TMB) gases, their use in experimental procedures poses significant safety risks (22).…”