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Investigation of Vacuum Ultraviolet Photoionization of Methylcyclohexane in Energy Region of 9$ - $15.5 eV
Hang Zhang, Li Yan-bo, Zhu Long, Chen Jun, Yu Ye-peng, Li Zhao-hui, Lin Xuan, Shan Xiao-bin, Liu Fu-yi, Sheng Liu-si
2020, 33(3): 296-302. doi: 10.1063/1674-0068/cjcp1905095
摘要:
Tuning Structural, Electronic, and Magnetic Properties of Black-AsP Monolayer by Adatom Adsorptions: A First Principles Study
Xin Liu, Yu-xiang Ni, Hong-yan Wang, Hui Wang
2020, 33(3): 311-318. doi: 10.1063/1674-0068/cjcp1907136
摘要:
Six-Dimensional $ab$ $ initio$ Potential Energy Surface and Bound States for He-H$ _\textbf{2} $S Complex
Chao-ying Han, Ting Jiang, Hua Zhu, Hong-jun Fan
2020, 33(3): 319-326. doi: 10.1063/1674-0068/cjcp1907145
摘要:
Electronic Stability of Bimetallic Au$ _{\textbf{2}} $@Cu$ _{\textbf{6}} $ Nanocluster: Closed-Shell Interaction and Multicenter Bonding
Ying-ying Ma, Yuan-qin Yu, Long-jiu Cheng
2020, 33(3): 327-333. doi: 10.1063/1674-0068/cjcp1912200
摘要:
Metallophilic interaction is a unique type of weak intermolecular interaction, where the electronic configuration of two metal atoms is closed shell. Despite its significance in multidisciplinary fields, the nature of metallophilic interaction is still not well understood. In this work, we investigated the electronic structures and bonding characteristic of bimetallic Au$ _{2} $@Cu$ _{6} $ nanocluster through density functional theory method, which was reported in experiments recently [Angew. Chem. Int. Ed. 55 , 3611 (2016)]. In general thinking, interaction between two moieties of (CuSH)$ _{6} $ ring and (Au$ _{2} $PH$ _{3} $)$ _{2} $ in the Au$ _{2} $@Cu$ _{6} $ nanocluster can be viewed as a d$ ^{10} $-$ \sigma $ closed-shell interaction. However, chemical bonding analysis shows that there is a ten center-two electron (10c-2e) multicenter bonding between two moieties. Further comparative studies on other bimetallic nanocluster M$ _{2} $@Cu$ _{6} $ (M = Ag, Cu, Zn, Cd, Hg) also revealed that multicenter bonding is the origin of electronic stability of the complexes besides the d$ ^{10} $-$ \sigma $ closed-shell interaction. This will provide valuable insights into the understanding of closed-shell interactions.
Principles of Surface Potential Estimation in Mixed Electrolyte Solutions:Taking into Account Dielectric Saturation
Wen-xin Zou, Jing Peng, Wei-ning Xiu, Xin-min Liu
2020, 33(3): 334-342. doi: 10.1063/1674-0068/cjcp1907132
摘要:
The dielectric properties between in-particle/water interface and bulk solution are significantly different, which are ignored in the theories of surface potential estimation. The analytical expressions of surface potential considering the dielectric saturation were derived in mixed electrolytes based on the nonlinear Poisson-Boltzmann equation. The surface potentials calculated from the approximate analytical and exact numerical solutions agreed with each other for a wide range of surface charge densities and ion concentrations. The effects of dielectric saturation became important for surface charge densities larger than 0.30 C/m$ ^2 $. The analytical models of surface potential in different mixed electrolytes were valid based on original Poisson-Boltzmann equation for surface charge densities smaller than 0.30 C/m$ ^2 $. The analytical model of surface potential considering the dielectric saturation for low surface charge density can return to the result of classical Poisson-Boltzmann theory. The obtained surface potential in this study can correctly predict the adsorption selectivity between monovalent and bivalent counterions.
Interaction of CO and O$ _\textbf{2} $ with Supported Pt Single-Atoms on TiO$ _\textbf{2} $(110)
Shi-hui Dong, Wang Ao-lei, Zhao Jin, Shi-jing Tan, Bing Wang
2020, 33(3): 349-356. doi: 10.1063/1674-0068/cjcp1911198
摘要:
In view of the high activity of Pt single atoms in the low-temperature oxidation of CO, we investigate the adsorption behavior of Pt single atoms on reduced rutile TiO$ _2 $(110) surface and their interaction with CO and O$ _2 $ molecules using scanning tunneling microscopy and density function theory calculations. Pt single atoms were prepared on the TiO$ _2 $(110) surface at 80 K, showing their preferred adsorption sites at the oxygen vacancies. We characterized the adsorption configurations of CO and O$ _2 $ molecules separately to the TiO$ _2 $-supported Pt single atom samples at 80 K. It is found that the Pt single atoms tend to capture one CO to form Pt-CO complexes, with the CO molecule bonding to the fivefold coordinated Ti (Ti$ _{5 \rm{c}} $) atom at the next nearest neighbor site. After annealing the sample from 80 K to 100 K, CO molecules may diffuse, forming another type of complexes, Pt-(CO)$ _2 $. For O$ _2 $ adsorption, each Pt single atom may also capture one O$ _2 $ molecule, forming Pt-O$ _2 $ complexes with O$ _2 $ molecule bonding to either the nearest or the next nearest neighboring Ti$ _{5 \rm{c}} $ sites. Our study provides the single-molecule-level knowledge of the interaction of CO and O$ _2 $ with Pt single atoms, which represent the important initial states of the reaction between CO and O$ _2 $.
Fabrication of Melamine/Tb\begin{document}$ ^{\textbf{3+}} $\end{document}-Intercalated Polydiacetylene Nanosheets and Their Thermochromic Reversibility Test
Qing Wang, Gang Wang, Xia-yun Huang, Dao-yong Chen
2020, 33(3): 357-364. doi: 10.1063/1674-0068/cjcp1907143
摘要:

Polydiacetylene (PDA) is one kind of the conjugated polymer with layered structure, which can serve as a host to accommodate the guest components through intercalation. In these intercalated PDAs, some of them were reported to have a nearly perfect organized structure and perform completely reversible thermochromism. Till now, these reported intercalated PDAs were made by only introducing a single component for intercalation. Here, we chose 10, 12-pentacosadiynoic acid (PCDA) as the monomer, of which the carboxyl-terminal groups can interact with either Tb

\begin{document}$ ^{3+} $\end{document}

ions or melamines (MAs). When the feeding molar ratio of PCDA, MA, and Tb

\begin{document}$ ^{3+} $\end{document}

ion was 3:267:1, only Tb

$ ^{3+} $

ions were intercalated though excess MAs existed. Such Tb

$ ^{3+} $

-intercalated poly-PCDA exhibited completely reversible thermochromism, where almost all the carboxyl groups interacted with Tb

$ ^{3+} $

ions to form the nearly perfect structure. When the feeding molar ratio of PCDA, MA, and Tb

$ ^{3+} $

ion was 3:267:0.6, both Tb

$ ^{3+} $

ions and MAs were intercalated. There existed some defects in the imperfect MA-intercalated domains and at the domain boundaries. The MA/Tb

$ ^{3+} $

-intercalated poly-PCDA exhibits partially reversible thermochromism, where the backbones near the defects are hard to return the initial conformation, while the rest, those at nearly perfect organized domains, are still able to restore the initial conformation.

Highly Sensitive Flexible Pressure Sensors based on Graphene/Graphene Scrolls Multilayer Hybrid Films
Yi-heng Zhai, Tao Wang, Zhi-kai Qi, Xiang-hua Kong, Hang-xun Xu, Heng-xing Ji
2020, 33(3): 365-370. doi: 10.1063/1674-0068/cjcp1907146
摘要:
In recent years, flexible pressure sensors have attracted much attention owing to their potential applications in motion detection and wearable electronics. As a result, important innovations have been reported in both conductive materials and the underlying substrates, which are the two crucial components of a pressure sensor. 1D materials like nanowires are being widely used as the conductive materials in flexible pressure sensors, but such sensors usually exhibit low performances mainly due to the lack of strong interfacial interactions between the substrates and 1D materials. In this paper, we report the use of graphene/graphene scrolls hybrid multilayers films as the conductive material and a micro-structured polydimethylsiloxane substrate using Epipremnum aureum leaf as the template to fabricate highly sensitive pressure sensors. The 2D structure of graphene allows to strongly anchor the scrolls to ensure the improved adhesion between the highly conductive hybrid films and the patterned substrate. We attribute the increased sensitivity (3.5 kPa$ ^{-1} $), fast response time ($ < $50 ms), and the good reproducibility during 1000 loading-unloading cycles of the pressure sensor to the synergistic effect between the 1D scrolls and 2D graphene films. Test results demonstrate that these sensors are promising for electronic skins and motion detection applications.
Facile Green Synthesis of Magnetic Fe$ _\textbf{3} $C@C Nanocomposite using Natural Magnetite
Ju-wen Gu, Yong Bai, Song-bai Qiu, Qian Zhang, Tie-jun Wang
2020, 33(3): 371-375. doi: 10.1063/1674-0068/cjcp1907142
摘要:
One simple and environmental friendly synthesis strategy for preparing low-cost magnetic Fe$ _3 $C@C materials has been facilely developed using a modified sol-gel approach, wherein natural magnetite acted as the iron source. A chelating polycarboxylic acid such as citric acid (CA) was employed as the carbon source, and it dissolved Fe very effectively, Fe$ _3 $O$ _4 $ and natural magnetite to composite an iron-citrate complex with the assistance of ammonium hydroxide. The core-shell structure of the as-prepared nanocomposites was formed directly by high-temperature pyrolysis. The Fe$ _3 $C@C materials exhibited superparamagnetic properties (38.09 emu/mg), suggesting potential applications in biomedicine, environment, absorption, catalysis, etc.
Magnetic Nano-Amorphous-Iron-Oxide-Based Drug Delivery System with Dual Therapeutic Mechanisms
Shan Lei, Li-an Wang, Fu-xing Lin, Kun Zeng, Mo-zhen Wang
2020, 33(3): 376-384. doi: 10.1063/1674-0068/cjcp1906123
摘要:
Smart nanoparticles that respond to pathophysiological parameters, such as pH, GSH, and H$ _2 $O$ _2 $, have been developed with the huge and urgent demand for the high-efficient drug delivery systems (DDS) for cancer therapy. Herein, cubic poly(ethylene glycol) (PEG)-modified mesoporous amorphous iron oxide (AFe) nanoparticles (AFe-PEG) have been successfully prepared as pH-stimulated drug carriers, which can combine doxorubicin (DOX) with a high loading capacity of 948 mg/g, forming a novel multifunctional AFe-PEG/DOX nanoparticulate DDS. In an acidic microenvironment, the AFe-PEG/DOX nanoparticles will not only release DOX efficiently, but also release Fe ions to catalyze the transformation of H$ _2 $O$ _2 $ to $ \cdot $OH, acting as fenton reagents. In vitro experimental results proved that the AFe-PEG/DOX nanoparticles can achieve combination of chemotherapeutic (CTT) and chemodynamic therapeutic (CDT) effects on Hela tumor cells. Furthermore, the intrinsic magnetism of AFe-PEG/DOX makes its cellular internalization efficiency be improved under an external magnetic field. Therefore, this work develops a new and promising magnetically targeted delivery and dual CTT/CDT therapeutic nano-medicine platform based on amorphous iron oxide.
融合出版视角下的内容标引体系构建
赵宏源
2020, 0(0): 1-7. doi: 10.19619/j.issn.1007-1938.2020.00.021
摘要:
在融合出版背景下,内容标引作为出版物内容传播的基础,作用更加突出,从知识关联、智能化推荐、搜索引擎优化到内容交付都有赖于完整的内容标引体系。文章根据融合出版内容运营的特征,提出构建包含知识元标引、社会标引、隐性知识标引在内的标引体系,及基于内容交互的标引动态更新,以满足用户不同场景的使用需求。
Single-photon avalanche diode imagers in biophotonics: review and outlook
Claudio Bruschini, Harald Homulle, Ivan Michel Antolovic, Samuel Burri, Edoardo Charbon
2019, 8(): 87-87. doi: 10.1038/s41377-019-0191-5
摘要:
Single-photon avalanche diode (SPAD) arrays are solid-state detectors that offer imaging capabilities at the level of individual photons, with unparalleled photon counting and time-resolved performance. This fascinating technology has progressed at a very fast pace in the past 15 years, since its inception in standard CMOS technology in 2003. A host of architectures have been investigated, ranging from simpler implementations, based solely on off-chip data processing, to progressively "smarter" sensors including on-chip, or even pixel level, time-stamping and processing capabilities. As the technology has matured, a range of biophotonics applications have been explored, including (endoscopic) FLIM, (multibeam multiphoton) FLIM-FRET, SPIM-FCS, super-resolution microscopy, time-resolved Raman spectroscopy, NIROT and PET. We will review some representative sensors and their corresponding applications, including the most relevant challenges faced by chip designers and end-users. Finally, we will provide an outlook on the future of this fascinating technology.
疫情影响下的图书出版市场及应对策略
李静丽
0, 0(0): . doi: 10.19619/j.issn.1007-1938.2020.00.033
摘要:
受新冠肺炎疫情影响,我国图书零售市场、图书品种结构及营销模式都发生了明显改变。后疫情时期,各出版机构应对图书的选题趋势、市场需求等有客观的分析和认识,并做出合理的市场预判;发挥专业优势和品牌图书的影响力,以“不变”应“万变”,积极打造精品图书门类,形成图书出版的抗疫合力;利用疫情变化的窗口期,积极探索图书出版的模式和品类,实现多业态、多平台的跨界融合,满足读者需求及阅读习惯的变化,不断优化、调整、延伸出版产业链,提升出版企业的抗风险能力。
《中华医学百科全书》医学名词规范化探索
沈冰冰
0, 0(0): . doi: 10.19619/j.issn.1007-1938.2020.00.023
摘要:
医学名词规范化是《中华医学百科全书》编纂过程中的重要课题之一。文章从该书的编辑工作实践出发,分析了医学名词规范化过程中存在的问题,通过分析研究,确立了遵循科学性、体现医学科学发展、遵循国际规范等医学名词规范化原则,实现了《中华医学百科全书》编辑工作的创新性。
书有其表:西方古书经典装帧形制拾珍
齐世峰
0, 0(0): .
摘要:
在漫长的书籍衍变过程中,出现了不同风格的装帧形制。西方古书装帧受不同材料、工艺、地区、时代等因素影响有着让人眼花缭乱的装帧形式和风格。本文整理分析了珠宝装帧、腰带书、连背装帧、混凝纸装帧和古软装帧五种经典装帧形式的结构、历史文化等内容,以管窥西方古书装帧的发展变化。
议程设置视域下国际关系学术期刊的选题策划
李意
0, 0(0): .
摘要:
议程设置对国际关系学术期刊的选题策划有重要的指导作用。通过对信息进行捕捉、对选题进行设计、论证和优化,期刊编辑完成了针对国际关系热点问题的具体议程,从而一定程度上影响公众舆论和决策部门。国际关系学术期刊的议程设置具有较强的理论价值与应用价值。本文以国际关系学术期刊为例,在梳理议程设置与期刊选题策划关系的基础上,分析议程设置在期刊选题策划中的行为过程,探索议程设置对期刊选题策划的作用。在议程设置的指引下,国际关系学术期刊通过加强选题策划的工作,不断凸显期刊的办刊特色,发挥着影响学术生态、引导舆论传播的重要作用。
试论新闻出版审读环节中的保密自审
柴静
0, 0(0): .
摘要:
新闻出版是社会信息公开传播的重要渠道,内容涉及政治、军事、经济、科技、国防建设等诸多领域,种类繁多且覆盖面广,加上新闻出版传播迅速,一旦发生泄密事件,会给国家安全和利益造成严重影响和损失。新闻出版行业应当高度重视新闻出版保密工作,坚决落实新闻出版工作各环节的保密审查制度,做到既维护国家安全和利益,又能够推进新闻出版事业繁荣发展。
“盲盒”经济在图书营销中的创新应用——以南京先锋书店“盲选图书”为例
刘洋
0, 0(0): . doi: 10.19619/j.issn.1007-1938.2020.00.030
摘要:
图书盲盒通过盲选图书或结合文创产品促进图书销售,不失为一种有效的图书营销策略。文章以南京先锋书店“盲选图书”为例,分析“盲选图书”的现状和困境,提出发展策略,探究其对图书营销的启示。