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Safety profile of two-dimensional Pd nanosheets for photothermal therapy and photoacoustic imaging

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Nano Research 2017年第4期10卷 1234-1248页

作者： mei chen Shuzhen chen chengyong He Shiguang Mo Xiaoyong wang Gang Liu Nanfeng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Engineering Research Center for Nano-Preparation Technology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Center for Molecular Imaging and Translational Medicine School of Public Health Xiamen University Xiamen 361005 China Department of Microbiology and Immunology Xiamen Medical College Xiamen 361008 China

Two-dimensional （2D） nanosheets have emerged as an important class of nanomaterial with great potential in the field of biomedicines, particularly in cancer theranostics. However, owing to the lack of effective methods that synthesize uniform 2D nanomaterials with controlled size, systematic evaluation of size-dependent bio-behaviors of 2D nanomaterials is rarely reported. To the best of our knowledge, we are the first to report a systematic evaluation of the influence of size of 2D nanomaterials on their bio-behaviors. 2D Pd nanosheets with diameters ranging from 5 to 80 nm were synthesized and tested in cell and animal models to assess their size-dependent bioapplication, biodistribution, elimination, toxicity, and genomic gene expression profiles. Our results showed size significantly influences the biological behaviors of Pd nanosheets, including their photothermal and photoacoustic effects, pharmacokinetics, and toxicity. Compared to larger-sized Pd nanosheets, smaller-sized Pd nanosheets exhibited more advanced photoacoustic imaging and photothermal effects upon ultralow laser irradiation. Moreover, in vivo results indicated that 5-nm Pd nanosheets escape from the reticuloendothelial system with a longer blood half-life and can be cleared by renal excretion, while Pd nanosheets with larger sizes mainly accumulate in the liver and spleen. The 30-nm Pd nanosheets exhibited the highest tumor accumulation. Although Pd nanosheets did not cause any appreciable toxicity at the cellular level, we observed slight lipid accumulation in the liver and inflammation in the spleen. Genomic gene expression analysis showed that 80-nm Pd nanosheets interacted with more cellular components and affected more biological processes in the liver, as compared to 5-nm Pd nanosheets. We believe this work will provide valuable information and insights into the clinical application of 2D Pd nanosheets as nanomedicines.

关键词： Pd nanosheets photothermal therapy photoacoustic imaging toxicity evaluation genomic gene expression

Correlating the interplanetary factors to distinguish extreme and major geomagnetic storms

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Earth and Planetary Physics 2021年第2期5卷 180-186页

作者： Ragini Balachandran Li-Jen chen Shan wang mei-Ching Fok Cornell University IthacaNY 14853USA NASA Goddard Space Flight Center GreenbeltMD 20770USA Department of Astronomy University of MarylandCollege ParkMD 20742USA

We investigate the correlation between Disturbance Storm Time(Dst)characteristics and solar wind conditions for the main phase of geomagnetic storms,seeking possible factors that distinguish extreme storms(minimum Dst<−250 nT)and major storms(minimum Dst<−100 nT).In our analysis of 170 storms,there is a marked correlation between the average rate of change of Dst during a storm’s main phase(ΔDst/Δt)and the storm’s minimum Dst,indicating a fasterΔDst/Δt as storm intensity *** events add a new regime toΔDst/Δt,the hourly time derivative of Dst(dDst/dt),and sustained periods of large amplitudes for southward interplanetary magnetic field Bz and solar wind convection electric field *** find that Ey is a less efficient driver of dDst/dt for extreme storms compared to major storms,even after incorporating the effects of solar wind pressure and ring current *** minimum Dst is correlated with minimum Bz,we observe a similar divergence,with extreme storms tending to have more negative Dst than the trend predicted on the basis of major *** results enable further improvements in existing models for storm predictions,including extreme events,based on interplanetary measurements.

关键词： extreme geomagnetic storm Dst prediction solar wind driving major storms

Janus membrane with enhanced interfacial activation for solar evaporation

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Journal of Energy Chemistry 2023年第12期87卷 1-11,I0002页

作者： Hao chen Guangze Pan mei Yan Fang wang Yadong Wu Chongshen Guo School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Low solar spectrum coverage,high evaporation enthalpy,and undesired salt deposition severely limited the solar-driven interfacial evaporation technology for further sewage purification and seawater *** overcome these problems,we designed an amphiphilic Janus-structured polyaniline(PANI)/ZrC/cellulose acetate(CA)(J-PZCA) ***,the interfacial interaction between PANI and ZrC enhances the photoabsorption and photothermal conversion ***,low thermal conductivity reduces the heat lost at the *** importantly,ZrC could facilitate interfacial activation,which weakens the intermolecular forces of water by affecting the hydrogen *** 1 solar irradiation(1 sun),the composite membrane exhibits a high evaporation rate of 1.31 kg m^(-2)h^(-1) and an excellent efficiency of 79.4%.In addition,the sewage purification and seawater desalination experiments reveal a remarkable purification capability of J-PZCA *** for the treatment of high-concentration salt solution,it realizes a long-term stable evaporation performance due to the excellent salt deposition ***,the J-PZCA membrane constructed in this study provides a new perspective for the design of efficient interfacial evaporation devices.

关键词： Interfacial water evaporation Photothermal synergy Interfacial activation ZrC PANI

Thermodynamic and kinetic roles of H2 in structure evolution of urchin-like Co:A density functional theory study

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Particuology 2020年第1期18卷 2-12页

作者： Xiaolei wang Ning Liu Qinwei Zhang Xin Liang Biaohua chen Donghai mei State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China College of Environmental and Energy Engineering Beijing University of TechnologyBeijing 100124China Institute of Integrated Catalysis Pacific Northwest National LaboratoryRichlandWA 99352USA

Small gas molecules acting as good capping agents play important roles in controlling the morphologies and surface structures of metal *** the present work,the thermodynamic and kinetic roles of H2 molecules in the morphology of Co nanocrystals were systematically studied by density functional theory(DFT).The Gibbs surface free energies of Co(100),Co(110),and Co(111)at different hydrogen surface coverages were determined by ab initio *** phase diagram of stable H coverage on each plane was obtained and morphology evolution of the Co nanocrystals with various surface hydrogen coverages was predicted by the Wulff *** of H2 changes the facet stability,generating diverse morphological Co *** kinetic role of H2 in adatom Co surface diffusion at different H coverages was investigated by *** results suggest that surface H hinders Co surface diffusions,except for Co(100)at 0.56 monolayer *** projected density of states gives deeper insight into the electronic structures of Co adatoms with addition of the surface H atoms,which affect its surface diffusion ability.

关键词： Nanocrystal Co Surface free energy Surface diffusion Density functional theory

Multifunctional robust aerogel separator towards high-temperature,large-rate,long-cycle lithium-ion batteries

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Chinese Chemical Letters 2023年第5期34卷 530-534页

作者： mei-chen Liu Hui-Jun chen Gang Wu Xiu-Li wang Yu-Zhong wang The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu 610064China

Separators is indispensable for the normal operation of lithium-ion batteries(LIBs).However,the widely used commercial polyolefin separators have some inherent deficiencies such as poor thermotolerance,high inflammability and inferior electrolyte wettability,which restrict their further applications of the advanced and safe ***,we design a novel thermotolerant(a shrinkage percentage of 0%at 300℃)and flame retarded aerogel separator consisting of aramid nanofibers(ANFs).Because of its high porosity(86.5%±6.1%)and excellent electrolyte uptake(695%),the ANFs aerogel separator has an ionic conductivity of 1.04 mS/cm and a high lithium-ion transference number(0.67),which can endow LIBs with outstanding rate performance and superior cycling ***,the ANFs aerogel separator-based batteries possess a discharge specific capacity of 102 m Ah/g with a capacity retention of 90.7%and a Coulombic efficiency of 99.3%after 600 cycles at 5 *** addition,under an operated temperature of 90℃,the battery with ANFs aerogel separator can still conduct the very steady chargedischarge,presenting a capacity retention of 90.1%and a Coulombic efficiency of 99.6%after 200 cycles at 3 ***,the separator can probably serve as a potential candidate for application to advanced and safe LIBs.

关键词： Aramid nanofibers Aerogel separator Lithium-ion batteries High performance Safety

Design and prediction for highly efficient SO_(2) capture from flue gas by imidazolium ionic liquids

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Green Energy & Environment 2022年第1期7卷 130-136页

作者： Lili Jiang Ke mei Kaihong chen Rina Dao Haoran Li Congmin wang Department of Chemistry Zhejiang UniversityHangzhou310027China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Zhejiang UniversityHangzhou310027China

An efficient method for prediction in the capture of SO_(2)from flue gas by imidazolium ionic liquids was reported,where the concentration of SO_(2)is 2000 *** the basis of quantitative calculations through a combination of Langmuir simulation,theoretical calculation and quantum chemical method,SO_(2)absorption and desorption performance from flue gas by twelve kinds of imidazolium ionic liquids with different anions were designed and ***,among them,five kinds of imidazolium ionic liquids were chosen and prepared to investigate their behavior of SO_(2)absorption capacity,desorption residue,and available absorption *** results indicated that the experimental values were in good agreement with the predicted ***,an ideal ionic liquid[Emim][Tetz]was obtained through the predictive method for the capture of SO_(2)of 2000 ppm,which showed high available absorption capacity of 0.24 g SO_(2)per g ionic liquid and excellent reversibility.

关键词： Ionic liquids Desulfurization Quantum calculation Langmuir simulation Prediction

Evaluation of the effects of health education interventions for hypertensive patients based on the health belief model

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World Journal of Clinical Cases 2024年第15期12卷 2578-2585页

作者： Hong-mei wang Ying chen Yan-Hua Shen Xiao-mei wang Department of Emergency Lishui Second People's HospitalLishui 323000Zhejiang ProvinceChina Department of Pancreatic and Biliary Surgery The First Affiliated Hospital of China Medical UniversityShenyang 110002Liaoning ProvinceChina

BACKGROUND Hypertension is a major risk factor for cardiovascular disease and stroke,and its prevalence is increasing *** education interventions based on the health belief model(HBM)can improve the knowledge,attitudes,and behaviors of patients with hypertension and help them control their blood *** To evaluate the effects of health education interventions based on the HBM in patients with hypertension in *** Between 2021 and 2023,140 patients with hypertension were randomly assigned to either the intervention or control *** intervention group received health education based on the HBM,including lectures,brochures,videos,and counseling sessions,whereas the control group received routine *** were measured at baseline,three months,and six months after the intervention and included blood pressure,medication adherence,self-efficacy,and perceived benefits,barriers,susceptibility,and *** The intervention group had significantly lower systolic blood pressure[mean difference(MD):-8.2 mmHg,P<0.001]and diastolic blood pressure(MD:-5.1 mmHg,P=0.002)compared to the control group at six *** intervention group also had higher medication adherence(MD:1.8,P<0.001),self-efficacy(MD:12.4,P<0.001),perceived benefits(MD:3.2,P<0.001),lower perceived barriers(MD:-2.6,P=0.001),higher perceived susceptibility(MD:2.8,P=0.002),and higher perceived severity(MD:3.1,P<0.001)than the control group at six *** Health education interventions based on the HBM effectively improve blood pressure control and health beliefs in patients with hypertension and should be implemented in clinical practice and community settings.

关键词： Hypertension Health education Health belief model Blood pressure control Randomized controlled trial

树脂基质的表观粘度对防火涂料发泡成炭过程的影响

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上海涂料 2006年第2期44卷 1-4页

作者：许乾慰陈志梅王国建王伟同济大学材料科学与工程学院上海200092

树脂基质作为防火涂料中的粘结剂,对涂层的防火性能有着重要的影响。借用泡沫塑料中的发泡理论讨论了树脂的表观粘度对膨胀炭层泡孔结构的影响作用。试验结果表明:较高温度下仍具有较高粘度的高氯化聚乙烯(HCPE)比相对粘度较低的丙烯酸... 详细信息

树脂基质作为防火涂料中的粘结剂,对涂层的防火性能有着重要的影响。借用泡沫塑料中的发泡理论讨论了树脂的表观粘度对膨胀炭层泡孔结构的影响作用。试验结果表明:较高温度下仍具有较高粘度的高氯化聚乙烯(HCPE)比相对粘度较低的丙烯酸酯树脂具有更理想的泡孔结构,以HCPE为基质的涂料燃烧炭层的孔洞面积占总面积的百分比较丙烯酸酯树脂的为小,但单位面积孔洞计数却比丙烯酸酯树脂的大,从而以HCPE为基质的涂料防火隔热性能也更好。

关键词：防火涂料树脂基质熔融指数表观粘度发泡

The impact of key parameters on the cycle efficiency of multi-stage RCAES system

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Journal of Modern Power Systems and Clean Energy 2014年第4期2卷 422-430页

作者： Bin LIU Laijun chen Shengwei mei Feng LIU Junjie wang Sixian wang State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Due to the uncertainty and anti-peaking nature,large scale integration of renewable energy imposes great challenges to the operation and dispatch of power *** air energy storage(CAES)system provides new ideas to solve this problem as its characteristics of fast regulating,flexible location and long-service ***,regenerative compressed air energy storage(RCAES)system is widely concerned as its capability of heat recovery in the compression *** cycle efficiency is a key indicator of RCAES system which can be significantly impacted by the key parameters of the systems including compression ratio,exhaust air pressure of throttle(EAPT)and the maximum working pressure(MWP)of compressed air storage vessel(CASV).However,current research mostly focuses on the thermodynamic process and few studies have focused on the impact of key parameters on RCAES *** on the efficiency evaluation method which was formulated through the electricalmechanical-thermal dynamic process and measurable parameters,the impact of key parameters on the cycle efficiency of RCAES system is analyzed in this paper and a practical RCAES design scheme is adopted for case study.

关键词： RCAES Efficiency evaluation Parameters analysis Energy conversion Energy storage