China Academy of Engineering Physics

About: China Academy of Engineering Physics is a facility organization based out in Mianyang, China. It is known for research contribution in the topics: Laser & Microstructure. The organization has 14158 authors who have published 12055 publications receiving 115810 citations. The organization is also known as: Ninth Institute of Second Ministry of Mechanical Industry & Ninth Institute of Ministry of Nuclear Industry.

Total dose effects in MOS devices under different dose rates

Abstract: Three MOS devices are tested under two different dose rates of different simulation radiant point. The sensitive parameters related to the total-dose and the dose rate about the threshold voltage of MOSFET are studied in detail. The experiment results are analysed and discussed. Experimentation indicates:under the same radiation dose, ionizing radiation damage at low dose rate is more than that at high dose rate.

Evident Hydrogen Bonded Chains Building CL-20-Based Cocrystals

Abstract: We report two kinds of evident hydrogen bonded chains constructing two binary cocrystals of 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (CL-20) with para-benzoquinone (1) and 1,4-naphthoquinone (2): one kind is the CL-20 molecule chains linked by R22(6) hydrogen bonds, and the other is connected by CL-20 and coformer (1 or 2) molecules alternately through R21(5) hydrogen bonds. All chains extend to the entire cocrystals CL-20/1 and CL-20/2 with crossing points of CL-20 molecules. In contrast to the unremarkable intermolecular interactions in observed CL-20 polymorphs and cocrystals, these two kinds of chains in CL-20/1 and CL-20/2 are evident and can be readily understood using the definition of supramolecular synthons. Moreover, the thermal behaviors, impact sensitivity, and detonation properties of these two energetic cocrystals are reported.

Phosphorization Engineering on Metal-Organic Frameworks for Quasi-Solid-State Asymmetry Supercapacitors.

Abstract: Porous carbon and metal oxides/sulfides prepared by using metal-organic frameworks (MOFs) as the precursors have been widely applied to the realm of supercapacitors. However, employing MOF-derived metal phosphides as positive and negative electrode materials for supercapacitors has scarcely been reported thus far. Herein, two types of MOFs are used as the precursors to prepare CoP and FeP4 nanocubes through a two-step controllable heat treatment process. Due to the advantages of composition and structure, the specific capacitances of FeP4 and CoP nanocubes reach 345 and 600 F g-1 at the current density of 1 A g-1 , respectively. Moreover, a quasi-solid-state asymmetric supercapacitor is assembled based on charge matching principle by employing CoP and FeP4 nanocubes as the positive and negative electrodes, respectively, which exhibits a high energy density of 46.38 Wh kg-1 at the power density of 695 W kg-1 . Furthermore, a solar-charging power system is assembled by combining the quasi-solid-state asymmetric supercapacitor and monocrystalline silicon plates, substantiating that the device can power the toy electric fan. This work paves a practical way toward the rational design of quasi-solid-state asymmetry supercapacitors systems affording favorable energy density and long lifespan.

Packing Structures of CL-20-Based Cocrystals

Abstract: The CL-20-based cocrystals (CCCs) are now the most active in the field of energetic cocrystals, due to an advantage of high energy density while a disadvantage of low stability of CL-20, which may be tuned with desired structures and properties by cocrystallization. This work presents a comprehensive insight into the packing structures of 27 CCCs observed since 2017. First, it shows a high multiplicity of the coformer molecules of CL-20, with various shapes and sizes. Regarding the conformers, the β-, γ-, η-, e-, and ζ-forms appear in the CCCs, with a total above that observed in the CL-20 polymorphs; that two forms can exist in the same CCC highlights a difference in conformers between single component crystals and cocrystals; and the γ- and β-forms govern the CCCs with a total population of 87%. This high conformational diversity serves as a reason for the abundance of CCCs. Meanwhile, various stoichiometric ratios from 1:1 to 1:6 except from 1:5 are observed, and the lower ones predominate the CCCs, wi...