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Unraveling post-growth mechanisms of monolayer CsPbBr3 nanocubes:Laser-enhanced transformations and cathodoluminescence-electron microscopy correlations

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Journal of Energy Chemistry 2025年第01期 146-156页

作者： Mingxing Li Xiaoge Wang Xiaofan Cao Zhiqun He Chunjun Liang Mingxing Chen jing ju Fangtian You Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing Jiaotong University Beijing National Laboratory for Molecular Sciences (BNLMS) College of Chemistry and Molecular Engineering Peking University

Lead-halide perovskite nanoparticles（LHP NPs） are highly promising materials for next-generation displays and solid-state lighting due to their exceptional optical properties. However, their inherent instability presents a significant challenge. Recent advances have demonstrated that optoelectronic devices based on monolayer nanoparticle films exhibit both high luminescence efficiency and long-term *** research demonstrates that mobility limitations and anisotropic alignments in CsPbBr3nanocube monolayer films are key to their stabilization, hindering spontaneous growth through face-to-face fusion and resulting in the formation of connecting necks in a diagonal direction. Introducing laser irradiation confirmed this by significantly accelerating nanocubes growth, increasing mobility, and enhancing local structural ordering, leading to larger and more regularly shaped nanosheets. Fourier transform infrared spectroscopy and energy dispersive spectroscopy line-scan analyses indicated that laser irradiation did not disrupt the ligand structure. Transmission electron microscopy and correlative cathodoluminescence electron microscopy revealed the effects of post-growth and heterogeneous structures, including enhanced luminescence and inhomogeneous intensity in the nanosheets. These findings deepen the understanding of the post-growth mechanism of monolayer nanoparticles and the structure-emission correlation and highlight the unique role of laser irradiation in directing the formation of well-defined and regular nanostructures.

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The change of magnetic inclination angles associated with the X3.4 flare on December 13,2006

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Science China(Physics,Mechanics & Astronomy) 2009年第11期52卷 1702-1706页

作者： LI YiXuan jing ju TAN ChangYi WANG HaiMin Center for Solar-Terrestrial Research New Jersey Institute of TechnologyNewarkNJ 07102USA

Recent studies showed a consistent pattern of changes in the sunspot structure associated with major flares: part of the peripheral penumbral regions vanishes during flares, and meanwhile, the umbral cores and/or inner penumbral regions are darkened. To understand the underlying physics of these observations, we compare the magnetic inclination angle in the decayed peripheral and the enhanced inner penumbral regions before and after the 4B/X3.4 flare of 2006 December 13 by using the high-resolution vector magnetograms from Hinode. We find that the mean inclination angle in the decayed penumbra increases after the flare while that in the enhanced penumbra near flaring neutral line decreases. The result confirms the previous idea that two components of a δ sunspot become connected after flares. As a result of new connection, peripheral penumbral fields change from a more inclined to a more vertical configuration and transverse fields in umbral core and inner penumbral regions increase substantially (Liu et al. 2005). The flare-associated changes of Doppler width as well as other parameters (the transverse field strength, continuum intensity and filling factor) are also presented.

关键词： Sun:magnetic fields Sun:photosphere Sun:flares

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The correlation between expansion speed and magnetic field in solar flare ribbons

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Science China(Physics,Mechanics & Astronomy) 2009年第11期52卷 1754-1759页

作者： XIE WenBin WANG HaiMin jing ju BAO XingMing ZHANG HongQi Key Laboratory of Solar Activity National Astronomical Observatories of ChinaBeijing 100012China Physics Department New Jersey Institute of TechnologyNewarkNJ07102USA Jilin Normal University Jilin 136000China

In this paper, we study the correlation between the expansion speed of two-ribbon flares and the magnetic field measured in the ribbon location, and compare such correlation for two events with different magnetic configurations. These two events are: an M1.0 flare in the quiet sun on September 12, 2000 and an X2.3 flare in Active Region NOAA 9415 on April 10, 2001. The magnetic configuration of the M1.0 flare is simple, while that of X2.3 event is complex. We have derived a power-law correlation between the ribbon expansion speed (V r) and the longitudinal magnetic field (Bz) with an empirical relationship V r = A×Bz-δ, where A is a constant and δ is the index of the power-law correlation. We have found that δ for the M1.0 flare in the simple magnetic configuration is larger than that for the X2.3 flare in the complex magnetic configuration.

关键词： solar activity solar flares solar magnetic field

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Changes in starch quality of mid-season indica rice varieties in the lower reaches of the Yangtze River in last 80 years

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Journal of Integrative Agriculture 2020年第12期19卷 2983-2996页

作者： ZHANG Hao jing Wen-jiang XU jing-ju MA Bing-ju WANG Wei-lu ZHANG Wei-yang GU jun-fei LIU Li-jun WANG Zhi-qin YANG Jian-chang Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009P.R.China

Rice (Oryza sativa L.) quality depends mainly on the characteristics of starch stored in kernels. Understanding the changes in starch characteristics in kernels during variety improvement would have great significance to improve rice quality. This study was designed to investigate the starch characteristics in the kernels and associated physiological traits of indica rice varieties in the lower reaches of the Yangtze River in China in last 80 years. Eight representative mid-season indica rice varieties were grown in the field. The results showed that the grain yield was significantly increased with the improvement of varieties and such an increase was mainly attributed to the increase in total number of spikelets. The tall varieties applied in the 1940s–1950s had higher protein content, relative crystallinity and infrared (IR) ratio of 1 045/1 022 cm^–1. The semi-dwarf varieties applied in the 1980s–1990s had higher gel consistency, amylopectin content, IR ratio of 1 022/995 cm^–1, and breakdown value. With the improvement of varieties, the amylose content, large-sized starch granule number and volume distribution, onset and peak of gelatinization temperature, gelatinization and retrogradation enthalpy, setback value, pasting temperature, viscosity of peak, hot and final, and 1-aminocycopropane-1-carboxylic acid (ACC) concentrations in panicles and root bleeding were gradually decreased, whereas the medium-sized starch granule number and volume distribution, activities of key enzymes in grains, and zeatin (Z)+zeatin riboside (ZR) contents in panicles and root bleeding at grain filling stage were gradually increased. Correlation analysis showed that starch thermodynamic characteristics were closely related to starch structure and components, key enzymes and hormones. The results suggest that starch quality was enhanced through the optimization of starch components, structure, thermodynamics, and the regulation of key enzymes in grains and hormones in panicles and roo

关键词： rice starch thermodynamics hormone variety improvement

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The Relationship between Magnetic Gradient and Magnetic Shear in Five Super Active Regions Producing Great Flares

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Chinese Journal of Astronomy and Astrophysics 2006年第4期6卷 477-488页

作者： Hai-Min Wang Hui Song ju jing Vasyl Yurchyshyn Yuan-Yong Deng Hong-Qi Zhang David Falconer jing Li National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Big Bear Solar Observatory New Jersey Institute of Technology Big Bear City CA 92314 USA Marshall Space Flight Center SD50 Huntsville AL 35812 USA Institute for Astronomy University of Hawaii 2680 Woodlawn Drive Honolulu HI 96822 USA

We study the magnetic structure of five well-known active regions that produced great flares （X5 or larger）. The six flares under investigation are the X12 flare on 1991 june 9 in AR 6659, the X5.7 flare on 2000 july 14 in AR 9077, the X5.6 flare on 2001 April 6 in AR 9415, the X5.3 flare on 2001 August 25 in AR 9591, the X17 flare on 2003 October 28 and the X10 flare on 2003 October 29, both in AR 10486. The last five events had corresponding LASCO observations and were all associated with Halo CMEs. We analyzed vector magnetograms from Big Bear Solar Observatory, Huairou Solar Observing Station, Marshall Space Flight Center and Mees Solar Observatory. In particular, we studied the magnetic gradient derived from line-of-sight magnetograms and magnetic shear derived from vector magnetograms, and found an apparent correlation between these two parameters at a level of about 90%. We found that the magnetic gradient could be a better proxy than the shear for predicting where a major flare might occur： all six flares occurred in neutral lines with maximum gradient. The mean gradient of the flaring neutral lines ranges from 0.14 to 0.50 G km^-1, 2.3 to 8 times the average value for all the neutral lines in the active regions. If we use magnetic shear as the proxy, the flaring neutral line in at least one, possibly two, of the six events would be mis-identified.

关键词： Sun: activity -- Sun: flares -- Sun: magnetic fields -- Sun: coronal mass ejections (CMEs)

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Research of community endowment volunteer service

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International English Education Research 2016年第7期 44-46页

作者： ju jing School of Management Shanghai University of Engineering Science Shanghai 201620 China

To solve the pension problem brought by the aging, community endowment service as a new endowment mode has become hot *** volunteer service for the needs of elderly services play an important *** to improve the quality of the community volunteer service is an important issue in the community *** to Maslow＇s hierarchy of needs analysis of community endowment volunteer service, meet the demand, community endowment volunteer workers can better promote the development of community endowment volunteer service.

关键词： Maslow's hierarchy of needs Community endowment Volunteer service

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Community endowment service localization and globalization

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International English Education Research 2015年第5期 84-86页

作者： ju jing School of Management Shanghai University of Engineering and Science Shanghai 201620 China

to solve the pension problem brought by the aging and aging, community endowment service as a new endowment mode has become hot spot. Britain, the United States, Japan and other developed countries have formed a distinctive pattern of community endowment service. Community endowment service pattern in China is also actively explore, in the process, we accumulated a lot of valuable experience, but also there are quite a lot of problems to be solved. We should be in combination with the actual situation in our country, on the basis of draw lessons from foreign advanced community endowment development practices at the same time, set the global vision, local consciousness, people＇s standard all organic unification, perfecting endowment service system in our country, to have a more substantial development.

关键词： Community endowment localization globalization

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Development of technique to detect and classify small-scale magnetic flux cancellation and rapid blue-shifted excursions

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Research in Astronomy and Astrophysics 2015年第7期15卷 1012-1026页

作者： Xin Chen Na Deng Derek A.Lamb ju jing Chang Liu Rui Liu Sung-Hong Park Haimin Wang Space Weather Research Laboratory New Jersey Institute of Technology University Heights Southwest Research Institute CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary Sciences University of Science and Technology of China Institute for Astronomy Astrophysics Space Applications and Remote Sensing National Observatory of Athens Korea Astronomy and Space Science Institute

We present a set of tools for detecting small-scale solar magnetic cancellations and the disk counterpart of type II spicules（the so-called Rapid Blueshifted Excursions（RBEs））, using line-of-sight photospheric magnetograms and chromospheric spectroscopic observations, respectively. For tracking magnetic cancellation,we improve the Southwest Automatic Magnetic Identification Suite（SWAMIS） so that it is able to detect certain obscure cancellations that can be easily missed. For detecting RBEs, we use a normalized reference profile to reduce false-positive detections caused by the non-uniform background and seeing condition. Similar to the magnetic feature tracking in SWAMIS, we apply a dual-threshold method to enhance the accuracy of RBE detection. These tools are employed to analyze our coordinated observations using the Interferometric BIdimensional Spectrometer at the Dunn Solar Telescope of the National Solar Observatory and Hinode. We present the statistical properties of magnetic cancellations and RBEs, and explore their correlation using this data set.

关键词： Sun: chromosphere -- Sun: magnetic fields

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Comparison between the eruptive X2.2 flare on 2011 February15 and confined X3.1 flare on 2014 October 24

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Research in Astronomy and Astrophysics 2015年第9期15卷 1537-1546页

作者： ju jing Yan Xu Jeongwoo Lee Nariaki V.Nitta Chang Liu Sung-Hong Park Thomas Wiegelmann Haimin Wang Center for Solar-Terrestrial Research New Jersey Institute of Technology Big Bear Solar Observatory Astronomy Program Department of Physics and Astronomy Seoul National University Lockheed Martin Solar and Astrophysics Laboratory Institute for Astronomy Astrophysics Space Applications and Remote Sensing (IAASARS)National Observatory of Athens Max-Planck-Institut fuer Sonnensystemforschung

We compare two contrasting X-class flares in terms of magnetic free energy, relative magnetic helicity and decay index of the active regions （ARs） in which they occurred. The events in question are the eruptive X2.2 flare from AR 11158 accompanied by a halo coronal mass ejection （CME） and the confined X3.1 flare from AR 12192 with no associated CME. These two flares exhibit similar behavior of free magnetic energy and helicity buildup for a few days preceding them. A major difference between the two flares is found to lie in the time-dependent change of magnetic helicity of the ARs that hosted them. AR 11158 shows a significant decrease in magnetic helicity starting -4 hours prior to the flare, but no apparent decrease in helicity is observed in AR 12192. By examining the magnetic helicity injection rates in terms of sign, we confirmed that the drastic decrease in magnetic helicity before the eruptive X2.2 flare was not caused by the injection of reversed helicity through the photosphere but rather the CME-related change in the coronal magnetic field. Another major difference we find is that AR 11158 had a significantly larger decay index and therefore weaker overlying field than AR 12192. These results suggest that the coronal magnetic helicity and the decay index of the overlying field can provide a clue about the occurrence of CMEs.

关键词： Sun: magnetic topology -- Sun: evolution -- Sun: flares -- Sun: coronal mass ejections (CMEs)

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The Reflection of Modern Females' Prominent Qualities in Jane Eyre

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海外英语 2015年第6期 173-174页

作者：刘佳 ju jing 宁夏大学 Foreign Languages College Ningxia University

Nowadays the modern females get out of home, fighting with males to display their wonderful life and demonstrate the wonderful characters, so we will ask the question what qualities do the modern females belong? By analyzing the novel Jane Eyre, it is easy to see the qualities of heroine such as independence, desiring of knowledge, exploring true love and emphasizing on spirit world and so on. This paper explains that it is important for modern females to build up their excellent qualities in order to deal with a lot of barriers in their future way.

关键词： Jane Eyre qualities modern females

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