Well-designed Te/SnS₂/Ag artificial nanoleaves for enabling and enhancing visible-light driven overall splitting of pure water

Yan, Changzeng,Xue, Xiaolan,Zhang, Wenjun,Li, Xiaojie,Liu, Juan,Yang, Songyuan,Hu, Yi,Chen, Renpeng,Yan, Yaping,Zhu, Guoyin,Kang, Zhenhui,Kang, Dae Joon,Liu, Jie,Jin, Zhong unknown 2017 Nano energy Vol.39 No.-

<P><B>Abstract</B></P> <P>To produce hydrogen and oxygen from photocatalytic overall splitting of pure water provides a promising green route to directly convert solar energy to clean fuel. However, the design and fabrication of high-efficiency photocatalyst is challenging. Here we present that by connecting different nanostructures together in a rational fashion, components that cannot individually split water into H<SUB>2</SUB> and O<SUB>2</SUB> can work together as efficient photocatalyst with high solar-to-hydrogen (STH) energy conversion efficiency and avoid the use of any sacrificial reagent. Specifically, Te/SnS<SUB>2</SUB>/Ag artificial nanoleaves (ANLs) consist of ultrathin SnS<SUB>2</SUB> nanoplates grown on Te nanowires and decorated with numerous Ag nanoparticles. The appropriate band structure of Te/SnS<SUB>2</SUB> p-n junctions and the surface plasmon resonance of Ag nanoparticles synergistically enhance the quantum yield and separation efficiency of electron-hole pairs. As a result, Te/SnS<SUB>2</SUB>/Ag ANLs enable visible-light driven overall water-splitting without any sacrificial reagent and exhibit high H<SUB>2</SUB> and O<SUB>2</SUB> production rates of 332.4 and 166.2μmolh<SUP>−1</SUP>, respectively. Well-preserved structure after long-term measurement indicates its high stability. It represents a feasible approach for direct H<SUB>2</SUB> production from only sunlight, pure water, and rationally-designed ANL photocatalysts.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Te/SnS<SUB>2</SUB>/Ag ANLs heterostructure is prepared to catalyze overall water splitting. </LI> <LI> The catalyst show impressive H<SUB>2</SUB> and O<SUB>2</SUB> production rate under visible light. </LI> <LI> The structure and efficiency of catalyst shows no degradation after 10 days. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Subdivision of Nasopharyngeal Carcinoma Patients with Bone-Only Metastasis at Diagnosis for Prediction of Survival and Treatment Guidance

Xue-Song Sun,Yu-Jing Liang,Sai-Lan Liu,Qiu-Yan Chen,Shan-Shan Guo,Yue-Feng Wen,Li-Ting Liu,Hao-Jun Xie,Qing-Nan Tang,Xiao-Yun Li,Jin-Jie Yan,Lin-Quan Tang,Hai-Qiang Mai 대한암학회 2019 Cancer Research and Treatment Vol.51 No.4

Purpose The purpose of this study was to subdivide M1 stage nasopharyngeal carcinoma (NPC) patients with bone-only metastases for prognosis prediction while identifying the treatment effect of locoregional radiotherapy (LRRT) and metastasis radiotherapy (MRT) among patients with different risk. Materials and Methods From November 2006 to October 2016, a total of 226 patients with bone-only metastasic NPC were retrospectively enrolled. All patients developed distant lesions before receiving treatment. All potential prognostic factors were considered and the correlation of the M1 subdivisions with overall survival (OS) was determined by Cox regression hazards model. Kaplan-Meier curves were used to appraise survival condition and log-rank testing was used to compare the differences. Results The median follow-up time was 33.9 months (range, 3 to 126 months). According to multivariate Cox proportional hazard analysis, the number of metastatic lesions and Epstein-Barr virus (EBV) DNA status after palliative chemotherapy (PCT) were independent prognostic factors for OS. Thus, we subdivided patients into three risk groups according to these two factors. Systemic chemotherapy combined with LRRT may benefit patients in low- and intermediate-risk groups but not in the high-risk group. Further aggressive MRT based on systemic chemotherapy showed no survival benefit in any risk group. Conclusion The stratification of NPC patients with bone-only metastasis based on EBV DNA after PCT and the number of metastatic lesions provided promising prognostic value and could aid clinicians in person-specific treatment.

Chirp Characteristics of a Wavelength Converter Based on XGM in SOA

Xue Yan Zheng,Ke Jian Guan,Pei Da Ye 한국통신학회 1997 OPTOELECTRONICS & COMMUNICATIONS CONFERENCE Vol.2 No.1

The Study of Influencing Factors of Mobile E-commerce Software Use Intention-based on TAM and TRA

Yan Zhao,Ya-Ru Xue,Yan-Fei Jin,Jun-Wei Li,Yi He 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.8

With the wide popularity of mobile devices, e-commerce software in the mobile client forms a larger consumer market, which makes the volume of e-commerce transactions having a wide range of growth. As the consumers have a frequent contact with mobile devices, which makes consumers pay more attention to security and entertainment of the e-commerce software. Past mobile e-business research typically focus on the related factors about transaction process, like interface design, services and user experience, but seldom study the factors about consumers. On the basis of the TAM, this paper not only added perceived security and perceived entertainment, but also the consumers’ personality factors like subjective norm in TRA, into the model. The study shows that PU, PEU, PS and PE all will have direct or indirect effects on use attitude and use intention, and subjective norms and use attitude will directly affect the consumers' use intention. Through the empirical analysis we found that e-commerce operators not only make the consumers experience more of usefulness and ease of use, security, and entertainment in the technology and services, but also improve the popularity with the aid of the mainstream media propaganda and star power to enhance the public's normative beliefs, which will ultimately affect the user behavior of the consumers.

Morphology Characterization and Mechanism Analysis of the Microstructure of LiNbO3 Crystals Fabricated by Using Focused Ion Beam Milling

Xue-Lin Wang,Peng Liu,Qing Huang,Xue-Feng Xu,Sha Yan 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.4

This paper reports the basic results obtained from an investigation of the microstructure of lithium niobate (LiNbO3) crystals fabricated by using the focused ion beam (FIB) sputtering method. The morphology characterization of the microstructure is explained in terms of scanning electron microscopy observations based on the geometrical integrity, surface smoothness, cross-sectional area, aspect ratio, etc. The optimized micro-fabrication conditions and the sample morphology characterization are presented, and the sputtering rate of Ga ions for a 30-keV energy milling of the LiNbO3 crystal is calculated, which is lower than the theoretical one gained from “The Stopping and Range of Ions in Matter” (SRIM) sputtering simulation due to the redeposition effect being enhanced with increasing milling depth

Effect of a Novel Intracycle Motion Correction Algorithm on Dual-Energy Spectral Coronary CT Angiography: A Study with Pulsating Coronary Artery Phantom at High Heart Rates

Yan Xing,Yuan Zhao,Ning Guo,Cun-Xue Pan,Gulina Azati,Yan-Wei Wang,Wen-Ya Liu 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.6

Objective: Using a pulsating coronary artery phantom at high heart rate settings, we investigated the efficacy of a motion correction algorithm (MCA) to improve the image quality in dual-energy spectral coronary CT angiography (CCTA). Materials and Methods: Coronary flow phantoms were scanned at heart rates of 60−100 beats/min at 10-beats/min increments, using dual-energy spectral CT mode. Virtual monochromatic images were reconstructed from 50 to 90 keV at 10-keV increments. Two blinded observers assessed image quality using a 4-point Likert Scale (1 = non-diagnostic, 4 = excellent) and the fraction of interpretable segments using MCA versus conventional algorithm (CA). Comparison of variables was performed with the Wilcoxon rank sum test and McNemar test. Results: At heart rates of 70, 80, 90, and 100 beats/min, images with MCA were rated as higher image scores compared to those with CA on monochromatic levels of 50, 60, and 70 keV (each p < 0.05). Meanwhile, at a heart rate of 90 beats/min, image interpretability was improved by MCA at a monochromatic level of 60 keV (p < 0.05) and 70 keV (p < 0.05). At a heart rate of 100 beats/min, image interpretability was improved by MCA at monochromatic levels of 50 keV (from 69.4% to 86.1%, p < 0.05), 60 keV (from 55.6% to 83.3%, p < 0.05) and 70 keV (from 33.3% to 69.3%, p < 0.05). Conclusion: Low-keV monochromatic images combined with MCA improves image quality and image interpretability in CCTAs at high heart rates.

Investigation of temporal pulse splitting in a three-level cold-atom ensemble

Xue, Yan,Ham, B. S. American Physical Society 2008 Physical review. A. Atomic, molecular, and optical Vol.78 No.5

Defining Peace: Peace vs. Security

( Xue Tong Yan ) 한국국방연구원 2004 The Korean Journal of Defense Analysis Vol.16 No.1

One of the most popular beliefs in the modern world is that peace means security. Meanwhile many wars have been fought for the sake of security at the price of peace. The article argues that the state of security differs in terms of the degree of security. Peace is only one state of security, along with the other two states of security: war and neither-peace-nor-war. Peace comprises four degrees of security: no security, partial security, fair security and absolute security. These inherent characteristics of peace, explain why people substitute peace for war. As a social phenomenon, peace shares some common characteristics with war. Peace is an objective sought by man as well as a means used by man. Therefore, the justice of peace is determined by human concepts rather than by peace per se. These social characteristics of peace explain why peace has no superior justice over war. In terms of the social qualities of peace, it is clear that peace is an objective that people hope to achieve, but it is not the highest one for national security. Therefore, we should not confuse "peace" with "security." Peace is one way to resolve conflict but not necessarily the most efficient way. Accordingly, we should take care not to regard "maintaining peace" as the essential approach to strengthening national security. Peace as a criterion for justice is true only in some situations; peace achieved through power politics is an injustice.

Genetic Structure Among Populations of Elymus burchan-buddae and E. nutans (Triticeae; Poaceae) from the Qinghai-Tibetan Plateau

Xue-Bing Yan,Cheng-zhang Wang,Yu-Xia Guo,Bao-Rong Lu 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08

Genetic structure of 22 populations of two self-pollinating pasture species, Elymus nutans and E. burchan-buddae collected from various altitudes of the Qinghai-Tibetan Plateau was studied using fluorescence-based amplified fragment length polymorphism technique. Analysis of molecular variance revealed 42.97% and 37.63% among-population variation for the two Elymus species, respectively, indicating that the majority of the total variation presented within populations. This result contradicts the common genetic variation pattern for a selfing plant species: lower generic variation within populations. STRUCTURE analyses of the Elymus populations indicated an evident admixture genetic structure, particularly among neighboring populations from the same region, supporting the hypothesis of considerable seed dispersal among populations. The among-population gene flow promulgated by grazing animals may promote the maintenance of genetic diversity in the pasture species, particularly in small and fragmented populations within a given region. The gene flow promulgated by grazing animals may promote the maintenance of genetic diversity in the pasture species, particularly in small and fragmented populations within a given region.

Transducer analysis and signal processing of PMSF with embedded bluff body

Yan, Xiao-Xue,Xu, Ke-Jun,Xu, Wei,Yu, Xin-Long,Wu, Jian-Ping Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.2

Permanent magnet sodium flowmeter (PMSF) have been used to measure the sodium flow in fast breeder reactors. Due to the effects of irradiation, thermal cycling, time lapse, etc., the magnetic flux density of the PMSF will decrease after being used in the reactor for a period of time. Therefore, it must be calibrated regularly. But some flowmeters that immersed in sodium cannot be removed for an off-line calibration, so the on-line calibration is required. However, the best online calibration accuracy of PMSF using cross-correlation analysis method was 2.0-level without considering the repeatability. In order to further improve this work, the operational principle of the transducer in PMSF is analyzed and the design principle of the transducer is proposed. The transducers were tested on the sodium flow loop to collect the experimental data. The signal characteristics are analyzed from the time and frequency domains, respectively. The cross-correlation analysis method based on biased estimation is adopted to obtain the flow rate. The verification experimental results showed that the measurement accuracy is 1.0-level when the flow velocity is above 0.5 m/s, and the measurement accuracy is 3.0-level when the flow velocity is in the range of 0.2 m/s to 0.5 m/s.