检索结果-南通市图书馆

fucoidan and topography modification improved in situ endothelialization on acellular synthetic vascular grafts

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2023年第4期22卷 535-550页

作者： Yuan Yao Aung Moe Zaw Deirdre E.J.Anderson YeJin Jeong Joshua kunihiro Monica T.Hinds evelyn k.f.yim Department of Chemical Engineering University of Waterloo200 University Avenue WestWaterlooONN2L 3G1Canada Department of Biomedical Engineering Oregon Health&Science UniversityPortlandOR97239USA Waterloo Institute for Nanotechnology University of Waterloo200 University Avenue WestWaterlooONN2L 3G1Canada Center for Biotechnology and Bioengineering University of Waterloo200 University Avenue WestWaterlooONN2L 3G1Canada

Thrombogenesis remains the primary failure of synthetic vascular *** coverage is crucial to provide an antithrombogenic ***,most synthetic materials do not support cell adhesion,and transanastomotic endothelial migration is ***,a surface modification strategy using fucoidan and topography was developed to enable fast in situ endothelialization of polyvinyl alcohol,which is not endothelial *** three different immobilization approaches compared,conjugation of aminated-fucoidan promoted endothelial monolayer formation while minimizing thrombogenicity in both in vitro platelet rich plasma testing and ex vivo non-human primate shunt *** of six topographical patterns showed that 2μm gratings increased endothelial cell migration without inducing inflammation responses of endothelial *** studies demonstrated that fucoidan could attract fibronectin,enabling integrin binding and focal adhesion formation and activating focal adhesion kinase(fAk)signaling,and 2μm gratings further enhanced fAk-mediated cell *** a clinically relevant rabbit carotid artery end-to-side anastomosis model,60%in situ endothelialization was observed throughout the entire lumen of 1.7 mm inner diameter modified grafts,compared to 0%of unmodified graft,and the four-week graft patency also *** work presents a promising strategy to stimulate in situ endothelialization on synthetic materials for improving long-term performance.

关键词： Blood-contacting devices Small diameter vascular graft Endothelialization Topography fucoidan

Regulating interfacial stability of SiO_(x) anode with fluoride-abundant solid–electrolyte interphase by fluorine-functionalized additive

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 671-681页

作者： Subin Lee Taeeun yim Advanced Batteries Laboratory Department of ChemistryIncheon National UniversityIncheon22012Republic of Korea Research Institute of Basic Sciences College of Natural ScienceIncheon National UniversityIncheon22012Republic of Korea

Silicon oxide(SiO_(x))has received remarkable attention as a next-generation battery material;however,the sudden decrease in the cycling retention constitutes a significant challenge in facilitating its ***(2,2,2-trifluoroethyl)phosphite(TTfP),which can control parasitic reactions such as the pulverization of SiO_(x)anode materials and electrolyte decomposition,has been proposed to improve the lifespan of the *** electrochemical reduction of TTfP results in solid-electrolyte interphase(SEI)layers that are mainly composed of Lif,which occur at a higher potential than the working potential of the SiO_(x)anode and carbonate-based *** electrolyte with TTfP exhibited a substantial improvement in cycling retention after 100 cycles,whereas the standard electrolyte showed acutely decreased *** thickness of the SiO_(x)anode with TTfP also changed only slightly without any considerable delamination spots,whereas the SiO_(x)anode without TTfP was prominently deformed by an enormous volume expansion with several internal *** cycled SiO_(x)anode with TTfP exhibited less increase in resistance after cycling than that in the absence of TTfP,in addition to fewer decomposition adducts in corresponding X-ray photoelectron spectroscopy(XPS)analyses between the cycled SiO_(x)*** results demonstrate that TTfP formed SEI layers at the SiO_(x)interface,which substantially reduced the pulverization of the SiO_(x)anode materials;in addition,electrolyte decomposition at the interface decreased,which led to improved cycling retention.

关键词： Lithium-ion batteries(LIBs) Silicon oxide anode Electrolyte Additive Solid-electrolyte interphases(SEI) Tris(2,2,2-trifluoroethyl)phosphite

Critical role of corrosion inhibitors modified by silyl ether functional groups on electrochemical performances of lithium manganese oxides

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第12期29卷 425-433页

作者： Min Ji Seong Taeeun yim Department of Chemistry Incheon National UniversityYeonsu-gu 22012IncheonRepublic of Korea Research Institute of Basic Sciences College of Natural ScienceIncheon National UniversityYeonsu-gu 22012IncheonRepublic of Korea

Lithium manganese oxides(Li Mn2 O4, LMO) have attracted significant attention as important cathode materials for lithium-ion batteries(LIBs), which require fast charging based on their intrinsic electrochemical properties. However, these properties are limited by the rapid fading of cycling retention, particularly at high temperatures, because of the severe Mn corrosion triggered by the chemical reaction with fluoride(f-) species existing in the cell. To alleviate this issue, three types of silyl ether(Si–O)-functionalized task-specific additives are proposed, namely methoxytrimethylsilane, dimethoxydimethylsilane, and trimethoxymethylsilane. Ex-situ NMR analyses demonstrated that the Si-additives selectively scavenged the f-species as Si forms new chemical bonds with f via a nucleophilic substitution reaction due to the high binding affinity of Si with f-, thereby leading to a decrease in the f concentration in the cell. furthermore, the addition of Si-additives in the electrolyte did not significantly affect the ionic conductivity or electrochemical stability of the electrolyte, indicating that these additives are compatible with conventional electrolytes. In addition, the cells cycled with Si-additives exhibited improved cycling retention at room temperature and 45 °C. Among these candidates, a combination of MTSi and the LMO cathode was found to be the most suitable choice in terms of cycling retention(71.0%), whereas the cell cycled with the standard electrolyte suffered from the fading of cycling retention triggered by Mn dissolution(64.4%). Additional ex-situ analyses of the cycled electrodes using SEM, TEM, EIS, XPS, and ICP-MS demonstrated that the use of Si-additives not only improved the surface stability of the LMO cathode but also that of the graphite anode, as the Si-additives prevent Mn corrosion. This inhibits the formation of cracks on the surface of the LMO cathode, facilitating the formation of a stable solid electrolyte interphase layer on the su

关键词： Lithium-ion batteries Lithium manganese oxide cathode Electrolyte additive Corrosion Silyl ether fluoride scavenger

Homoclinic and heteroclinic solutions of cubic strongly nonlinear autonomous oscillators by hyperbolic Lindstedt-Poincaré method

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2010年第3期53卷 692-702页

作者： SZE kam yim Department of Mechanical Engineering The University of Hong Kong

The hyperbolic Lindstedt-Poincaré method is applied to determine the homoclinic and heteroclinic solutions of cubic strongly nonlinear oscillators of the form x + c1 x + c3 x 3= ε f (μ,x,x).In the method,the hyperbolic functions are employed instead of the periodic functions in the Lindstedt-Poincaré *** value of parameter μ under which there exists homoclinic or heteroclinic orbit can be determined by the perturbation *** applications are studied in *** illustrate the accuracy of the present method,its predictions are compared with those of Runge-kutta method.

关键词： Lindstedt-Poincaré Method nonlinear autonomous oscillator homoclinic orbit heteroclinic orbit

Synthesis and Ex Situ Doping of ZnTe and ZnSe Nanostructures with Extreme Aspect Ratios

在线全文

学校读者我要写书评

暂无评论

Nano Research 2009年第12期2卷 931-937页

作者： Joanne W.L.yim Deirdre Chen Gregory f.Brown Junqiao Wu Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

We report synthesis windows for growth of millimeter-long ZnTe nanoribbons and ZnSe nanowires using vapor *** tuning the local conditions at the growth substrate,high aspect ratio nanostructures can be synthesized.A Cu-ion immersion doping method was applied,producing strongly p-type conduction in ZnTe and ionic conduction in *** extreme aspect ratio wide-bandgap semiconductors have great potential for high density nanostructured optoelectronic circuits.

关键词： Aspect ratio doping nanowires zinc selenide zinc telluride

New onset atrial fibrillation following sub-Tenon's anaesthesia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2013年第6期6卷 900-901页

作者： Elliott Y.Ah-kee James f.Li yim Department of Ophthalmology University Ayr Hospital

Dear Sir,We write to report a case of new onset atrial fibrillation following sub-Tenon’s *** surgery is nowadays mostly performed as a day case procedure with 95.5%of surgery performed under local *** can be done with sub-Tenon’s,retrobulbar,peribulbar,intracameral or topical anaesthesia[1].Sub-Tenon’s anaesthesia involves opening the conjunctiva and tenon’s

关键词： figure New onset atrial fibrillation following sub-Tenon’s anaesthesia

Bilateral acute angle closure glaucoma precipitated by over the counter oral decongestant

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2014年第2期7卷 387-388页

作者： Elliott Y.Ah-kee James f.Li yim University of Glasgow University Avenue Glasgow G12 8QQ United Kingdom Department of Ophthalmology University Hospital AyrDalmellington Road Ayr Glasgow KA6 6DX United Kingdom

Dear Sir,We hereby report a case of bilateral acute angle closure glaucoma secondary to a systemic decongestant containing pseudoephedrine freely available over the *** angle closure glaucoma is an ocular *** recognition and treatment inevitably leads to permanent visual *** angle closure occurs as a result of obstruction to aqueous drainage by blockage of the trabecular meshwork by the *** presenting symptoms include acute onset of ocular pain,headache and blurred *** clinical examination,it is characterized by a markedly raised IOP of above 21 mm Hg together with

关键词： oral Bilateral acute angle closure glaucoma precipitated by over the counter oral decongestant over

A comparison of transmittance properties between ZnO∶Al films for transparent conductors for solar cells deposited by sputtering of AZO and cosputtering of AZO/ZnO

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2006年第Z1期25卷 105-109页

作者： LEE Chongmu yim keunbin CHO Youngjoon Lee J.G. Department of Materials Science and Engineering Inha University 253 Yonghyeon-dong Incheon 402-751 Korea School of Advanced Materials Engineering Kookmin University Seoul 136-702

Aluminum-doped zinc oxide (AZO) thin films were deposited on sapphire (002) and glass substrates by two different sputtering techniques radio frequency magnetron cosputtering of AZO and ZnO targets and sputtering of an AZO target. The dependence of the photoluminescence (PL) and transmittance properties of the AZO films deposited by cosputtering and sputtering on the AZO/ZnO target power ratio, R and the O2/Ar flow ratio, r were investigated, respectively. Only a deep level emission peak appears in the PL spectra of cosputtered AZO films whereas both UV emission and deep level emission peaks are observed in the PL spectra of sputtered AZO films. The absorption edges in the transmittance spectra of the AZO films shift to the lower wavelength region as R and r increase. Effects of crystallinity, surface roughness, PL on the transmittance of the AZO films were also explained using the X-ray diffraction (XRD), atomic force microscopy (AfM), and PL analysis results.

关键词： Al-doped ZnO (AZO) R.f. magnetron sputtering R.f. power transparent conducting oxide (TCO) transmittance

Electrical Properties of Sputter-deposited ZrO2-based Pt/ZrO_2/Si Capacitors

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2006年第6期22卷 807-810页

作者： keunbin yim Yeonkyu PARk Anna PARk Namhee CHO Chongmu LEE Department of Materials Science and Engineering Inha UniversityIncheon 402-751Korea

Pt/ZrO2/Si sandwich structures where ZrO2 is deposited by radio frequency （r.f.） magnetron sputtering using a Zr target in an atmosphere of O2/Ar gas mixture, were fabricated and the effects of the O2/Ar flow ratio in the reactive sputtering process, the annealing temperature, the ZrO2 film thickness on the structure, the surface roughness of ZrO2 films and the electric properties of Pt/ZrO2/Si metal-oxide-semiconductor （MOS） capacitors were investigated. The optimum process parameters of the Pt/ZrO2/Si capacitor based on reactively sputtered-ZrO2 determined in such a way as the capacitance is maximized and the leakage current, the oxide charge, and the interface trap density are minimized that is the O2/Ar flow ratio of 1.5, the annealing temperature of 800℃, and the film thickness of 10 nm. Also the conduction mechanism in the Pt/ZrO2/Si capacitor has been discussed.

关键词： ZrO2 Gate dielectrics Radio frequency Magnetron sputtering