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Regulating silver nanowire size enables efficient photoelectric conversion

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Science China Chemistry 2020年第8期63卷 1046-1052页

作者： Jie Xu Kai Wang Yi Li Tao-Tao Zhuang Huai-Ling Gao Yang-Yi Liu chuan-xin he Shu-Hong Yu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Department Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceDepartment of ChemistryInstitute of Biomimetic Materials&ChemistryUniversity of Science and Technology of ChinaHefei 230026China

The increasing demand for the state-of-the-art transparent conductive electrodes has received great interest in synthesizing silver nanowires(AgNWs)with a uniform diameter that exhibit excellent conductance,transparency,flexibility and mechanical ***,we report the controllable synthesis of ultrathin AgNWs with high aspect ratio via a polyol-assisted *** diameter of AgNWs can be continuously modulated from 20 to 80 nm by simply adjusting the aging *** selfassembled films fabricated by using AgNWs with a diameter of 20 nm as building blocks enable an excellent performance and show a sheet resistance of^30Ω/sq and an optical transmittance of 94%.In addition,such nanowire-based conductive films can keep the excellent flexibility and resistance after bending 10,000 ***,the intelligent dimming films prepared by this AgNW films also have excellent flexibility and stability.

关键词： silver nanowires polyol-assisted process assembly transparent conductive film conductive electrode

Bio-inspired synthesis of transition-metal oxide hybrid ultrathin nanosheets for enhancing the cycling stability in lithium-ion batteries

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Nano Research 2022年第6期15卷 5064-5071页

作者： Yan-Ru Wang Qing-Feng Zhuang Yi Li Ya-Lin Hu Yang-Yi Liu Qiao-Bao Zhang Lei Shi chuan-xin he Xiao Zheng Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterUniversity of Science and Technology of ChinaHefei 230026China Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenGuangdong 518060China Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamenFujian 361005China

Constructing two-dimensional(2D)structures for transition-metal oxides(TMOs)can optimize their electronic structures and enable high specific surface areas,thereby offering routes to enhancing the performance of TMOs in energy storage and ***,most 2D TMOs,e.g.,Fe_(2)O^(3),remain so far synthetically challenging due to their intrinsic non-layered ***,inspired by the mechanism of biomineralization,we report the synthesis of CuO/Fe_(2)O^(3)hybrid ultrathin nanosheets by using polyvinylpyrrolidone-decorated CuO nanosheets as growth modifiers to modulate the hydrolysis process of Fe^(2+).The formulated“absorption-and-crystallization”two-step formation processes of such 2D hybrid structures accorded well with the biomineralization scheme in *** the in-situ transmission electron microscopy(TEM)study,theoretical calculation,and control experiments,we validated that the large density of 2D/2D interfaces enabled by this bio-inspired synthesis process can overcome the self-stacking phenomenon during lithium-ion battery cycling,leading to their high operation *** work emphasizes the bio-inspired synthesis of 2D TMOs as a promising pathway toward material design and performance optimization.

关键词： bio-inspired synthesis two-dimensional transition-metal oxides hybrid nanosheets interfaces lithium-ion batteries

Ternary PtRuTe alloy nanofibers as an efficient and durable electrocatalyst for hydrogen oxidation reaction in alkaline media

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Science China Materials 2022年第12期65卷 3462-3469页

作者： Si-Yue Ma Tao Ma Qi Hu heng-Pan Yang chuan-xin he College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Sluggish kinetics of anodic hydrogen oxidation reaction(HOR)in alkaline media,which arises from the two orders of magnitude lower HOR activity in alkali than that in acid media for platinum group metals,hinders the commercial implementation of anion exchange membrane fuel cells(AEMFCs).Consequently,the development of platinum-based catalysts combined with high efficiency and durability is urgently ***,we report a facile route for the synthesis of ternary PtRuTe alloy nanofibers with Pt atomic ratio of only 11%via a simple galvanic replacement *** optimize the adsorption strength of platinum and ruthenium towards hydrogen and hydroxyl species by regulating the electron donation from tellurium to platinum and ***,the obtained trimetallic alloy catalyst exhibits an impressive kinetic current density of 30.6 mA cm^(−2)_(geo) at 50 mV and an exchange current density of 0.426 mA cm^(−2)_(metal),which shows 3.0-and 2.5-fold enhancement compared with the commercial Pt/C in alkaline electrolyte,***,the catalyst also demonstrates excellent stability with merely 5%activity attenuation after 2000 potential *** work offers new pathways to boost alkaline HOR by rationally designing multicomponent alloys.

关键词： alkaline fuel cells hydrogen oxidation reaction electrocatalysts Pt-based alloy nanofibers

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

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Science China Chemistry 2025年

作者： Jin Feng Zhen-Yu Geng Ting-Yao Song Ying-xin Ma chuan-Zeng Wang Wei Zhang Hong-Tao Lin Jin Zhou Shu-Ping Zhuo Shu-Hai Chen Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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基于卡尔加里-剑桥指南的沙龙培训模式提升全科规培医师医患沟通技能的对照研究

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中国全科医学 2025年第1期28卷 71-76页

作者：彭涛邹川曾欣张焱沈静四川省成都市第五人民医院全科医学科 611130

背景医患沟通技能是全科医生的核心岗位胜任力之一,高水平的医患沟通能力是创建和谐医患关系的基石,有助于提高患者就医获得感和满意度。而我国全科医生沟通能力普遍偏低,有待探索出一种适应我国国情、满足我国全科医生沟通需求的医患... 详细信息

背景医患沟通技能是全科医生的核心岗位胜任力之一,高水平的医患沟通能力是创建和谐医患关系的基石,有助于提高患者就医获得感和满意度。而我国全科医生沟通能力普遍偏低,有待探索出一种适应我国国情、满足我国全科医生沟通需求的医患沟通培训模式来提高其医患沟通能力。目的探索基于卡尔加里-剑桥指南的沙龙培训模式在全科规培医师医患沟通技能培训中的应用效果,为构建适合我国国情的医患沟通培训体系提供参考依据。方法选取成都市第五人民医院2019—2020年度全科规培医师40名作为研究对象,按照随机数字表法分为沙龙组和对照组,每组20名,其中沙龙组使用基于卡尔加里-剑桥指南的沙龙培训模式进行医患沟通培训,对照组设置为空白对照,培训前、培训后1周分别对两组学员采用标准化病人(SP)模式进行接诊,使用医患沟通评价量表(SEGUE量表)进行现场观察评分,比较两组学员的医患沟通培训效果。结果最终纳入28名,其中沙龙组15名,对照组13名,培训后沙龙组规培医师SEGUE量表评分从(11.80±4.36)分提高至(18.07±4.11)分,对照组规培医师SEGUE量表评分从(12.15±4.63)分提高至(14.46±3.71)分。沙龙组培训后的SEGUE量表评分与培训前的比较,差异有统计学意义(t=3.250,P<0.001);对照组培训后的SEGUE量表评分与培训前比较,差异无统计学意义(t=2.582,P=0.624);培训后对SEGUE量表中的25个项目进行分析,沙龙组与对照组SEGUE量表评分比较,差异有统计学意义(P<0.05)。沙龙组以下5个项目结果优于对照组,准备阶段中的“建立个人信任关系”(93.3%比7.7%)、“保护患者的隐私/尊重患者选择权”(53.3%比15.4%);理解患者阶段中的“认同患者为疾病所付出的努力、改变及其遇到的困难”(33.3%比23.1%)、“表达关心,使患者感到温暖/树立信心”(100.0%比69.2%);结束问诊阶段中的“询问患者是否还有其他的问题需要探讨”(66.7%比23.1%)。结论基于卡尔加里-剑桥指南的沙龙培训模式对全科规培医师进行医患沟通技能培训可增强学员主动参加培训的兴趣和积极性,对于医患沟通能力的提升具有较好的培训效果,值得借鉴和推广。

关键词：全科医学全科医师规范化培训医患沟通沟通培训卡尔加里-剑桥指南

Oncological outcomes and predictors of radiofrequency ablation of colorectal cancer liver metastases

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World Journal of Gastrointestinal Oncology 2020年第9期12卷 1044-1055页

作者： chuan-Zhuo Wang Guang-xin Yan he xin Zhao-Yu Liu Department of Radiology Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina

BACKGROUND Surgical resection is considered the standard treatment option for long-term survival in colorectal cancer liver metastasis(CRLM)patients,but only a small number of patients are suitable for resection following *** ablation(RFA)is an accepted alternative therapy for CRLM patients who are not suitable for ***,the relatively high rate of local tumor progression(LTP)is an obstacle to the more widespread use of *** To determine the oncological outcomes and predictors of RFA in CRLM *** A retrospective analyze was performed on the clinical data of 85 consecutive CRLM patients with a combined total of 138 liver metastases,who had received percutaneous RFA treatment at our institution from January 2013 to December ***-enhanced computed tomography was performed the first month after RFA to assess the technique effectiveness of the RFA and to serve as a baseline for subsequent *** Kaplan-Meier method was used to calculate overall survival(OS)and LTP-free survival(LTPFS).The log-rank test and Cox regression model were used for univariate and multivariate analyses to determine the predictors of the oncological *** There were no RFA procedure-related deaths,and the technique effectiveness of the treatment was 89.1%(123/138).The median follow-up time was 30 *** LTP rate was 32.6%(45/138),and the median OS was 36 *** 1-,3-,and 5-year OS rates were 90.6%,45.6%,and 22.9%,*** analysis revealed that tumor size and ablative margin were the factors influencing LTPFS,while extrahepatic disease(EHD),tumor number,and tumor size were the factors influencing *** analysis showed that tumor size larger than 3 cm and ablative margin of 5 mm or smaller were the independent predictors of shorter LTPFS,while tumor number greater than 1,size larger than 3 cm,and presence of EHD were the independent predictors of shorter *** RFA is a safe and effective tr

关键词： Colorectal cancer liver metastasis Radiofrequency ablation Local tumor progression Local tumor progression-free survival Overall survival

The influence of radial entrance width of the circular cavity on incident shock wave focusing

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Propulsion and Power Research 2018年第2期7卷 120-128页

作者： xin Chen chuan Wang Sheng Tan Liming he Qiang Zhang Aeronautics and Astronautics Engineering College Air Force Engineering UniversityXi’an 710038China Aerospace Science and Engineering College National University of Defense TechnologyChangsha 410071China

Despite the achievement of shock wave focusing with certain reflectors,the influence of the radial entrance width of a circular cavity on the flow field has yet to be *** this study,we systematically investigated the effects of the shock wave focusing process in a cavity based on the radial entrance *** experimental system was installed to research the evolution of the flow field under conditions with different radial entrance widths of 3.0,11.1,19.5,and 33.0 mm.A schlieren system was used to photograph the structures of the flow field in the cavity,and a data acquisition system was used to record the dynamic pressure histories of different points.A numerical simulation was carried out to investigate greater details of the shock wave focusing process.A third-order strong stability-preserving Runge-Kutta method,third-order weighed essential non-oscillation scheme,and an adaptive mesh refinement algorithm were adopted to simulate the shock wave reflection,diffraction,and focus *** agreement between the experimental and numerical results was *** comparing the evolution process of the flow field under the conditions of four different entrance cavity widths,we found that when the entrance width was 19.5 mm,there was the stronger intensity of the shock wave focusing in the focal region,and the larger pressure value at the apex of the cavity than the other three entrance widths,*** study improves our understanding of shock wave focusing.

关键词： Shock wave focusing Radial entrance widths Cavity Schlieren system Weighed essential nonoscillation

NUMERICAL SIMULATION OF VENTILATED CAVITATING FLOW AROUND A 2D FOIL

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Journal of Hydrodynamics 2005年第5期17卷 607-614页

作者： CheN xin LU chuan-jing Department of Engineering Mechanics Shanghai Jiaotong University Shanghai 200240 China

By using a pressure-based method and the finite volume method in the framework of the time dependent Reynolds-averaged Navier-Stokes equations, the authors studied the unsteady process of ventilated cavities generated forcing air through an orifice in a 2D hydrofoil without natural cavitation physically. The computation was carried out with the Volume Of Fluid （VOF） technique to track the gas-liquid two-phase interface. The results of simulation indicate that the ventilation rate is an important parameter in determining the morphology of cavity. There exists a critical value to convert sheet cavity into supereavity. A high ventilation rate can induce a two phase interface fluctuation and enable the ventilated eavitating flow to present a characteristic of periodicity.

关键词： ventilated cavity re entrant jet interface fluctuation Volume Of Fluid (VOF) techinique

Phase transformation and reduction kinetics during the hydrogen reduction of ilmenite concentrate

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International Journal of Minerals,Metallurgy and Materials 2012年第5期19卷 384-390页

作者： xin-guo Si Xiong-gang Lu chuan-wei Li Chong-he Li Wei-zhong Ding Shanghai Key Laboratory of Modern Metallurgy and Materials Processing Shanghai University Shanghai 200072 China hebei Iron and Steel Group Tangshan Steel Company Tangshan 063020 China

The reduction of ilmenite concentrate by hydrogen gas was investigated in the temperature range of 500 to 1200℃. The microstructure and phase transition of the reduction products were studied by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and optical microscopy （OM）. It was found that the weight loss and iron metallization rate increased with the increase of reduction temperature and reaction time. The iron metallization rate could reach 87.5% when the sample was reduced at 1150℃ for 80 min. The final phase constituents mainly consist of Fe, M305 solid solution phase （M=Mg, Ti, and Fe）, and few titanium oxide. Microstructure analysis shows that the surfaces of the reduction products have many holes and cracks and the reactions take place from the exterior of the grain to its interior. The kinetics of reduction indicates that the rate-controlling step is diffusion process control with the activation energy of 89 ***1-1.

关键词： ilmenite phase transformations kinetics hydrogen reduction metallization