简介：LowcostsiliconcarbonnanometerpowderwassynthesizedbycarbothermalreductionmethodwithnanometerSiO2andcarbonasrawmaterial.Itssynthesisthermodynamicswerediscussed.TheinfluenceofLaonTG-DSCcurvewasalsoanalyzed.ItindicatedthatthesynthesisprocessofSiCpowderhadtwosteps.InthefirststeptwomedialproductionsofSiOgandCOgformed,andinthesecondstep,β-SiCwasfinallysynthesized.After0.3%Laadded,atthefirststep,theinitiatoryformingtemperatureofproducingSiO(g)andCO(g)declinedfrom1351.4to1250.9℃,andthethermalactivationenergydecreasedfrom223.6to34.7J·g-1;atthesecondsteptheinitiatoryformingtemperatureofsynthesizingβ-SiCpowderdeclinedfrom1526.5to1357.8℃,andthethermalactivationenergydecreasedfrom693.7to295.7J·g-1.WithoutLaadded,thebestsynthesistechnologyforβ-SiCpowderwas1550℃for120min,averagepowderdiameterwasbiggerabout150nm.WithLaadded,thebestsynthesistechnologywas1500℃for120min,averagepowderdiameterwasabout100nm.

简介：WetheoreticallyinvestigatednegativeentropySofbiopolymerwhichpassesthroughananometerpore(suchasα-hemolysin),especiallyenteringprocessandescapingprocess,onthebasisofwhichwealsostudiedbiopolymerentering-poretimeτent,biopolymerenteringmeanvelocityvent,biopolymerescaping-poretimeτesc,andbiopolymerescapingmeanvelocityvesc,respectively.Ourresultsillustratethattheenteringandescapingprocessesofbiopolymerdependonitsnegativeentropy,andenteringprocessismoredifficultthanescapingprocessforbiopolymertranslocation.Thistremendousdifferencebetweenthetwoprocesseswillofferausefulengineeringhintforsinglemacromoleculeidentification.

简介：TheencapsulationofstearicacidcoatednanometerCaCO3byapolystyrene(PS)networkviaemulsionpolymerizationisdescribed,whereγ-methacryloxypropyltrimethoxysilane(MPS)wasusedasanefficientcrosslinker.TheimportantfactorssuchasthetypeandamountofsurfactantandinitiatorandthecontentofCaCO3areinvestigatedaswellastheroleofMPS.IthasbeenshownthatlittlePSwasextractablewithonly0.6wt%ofMPS(relativetostyrene).Thecationicsurfactantcetyltrimethylammoniumbromide(CTAB)provedmoreeffectivethantheanionicsurfactantsodiumdodecylsulfonate(SDS).Theyieldrises,particlesbecomesmallerandsizedistributionbroadenswithincreasedamountofCTAB.Itisalsofoundthateither2,2′-azobis(isobutyronitrile)(AIBN)orammoniumpersulfate(APS)issuitableforattaininghighmonomerconversion.WithincreasedamountofCaCO3,theencapsulationratiocanbevariedfrom17.9to3.6,whilemonomerconversionandyielddecreaseslightly.FT-IRspectraoftheproductsafterextractionindicatetightencapsulationbetweenPSandCaCO3,andTEMphotographsofcompositeparticleswithwell-definedcore-shellstructuregivedirectevidenceofencapsulation.

简介：在大约431nm的蓝光在C+培植以后从取向附生的硅被获得，在顺序蚀刻的氢环境和化学药品退火。随化学蚀刻的增加，蓝山峰起初被一座红山峰最后提高，然后减少了并且代替。C=O混合物在C+培植期间被介绍并且在纳米Si的表面嵌入在退火期间形成了，并且最后被形成纳米硅与嵌入结构，它贡献蓝排放。介绍是光致发光的可能的机制。

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简介：　　Thebonecompositewasproducedbybiomimeticsynthesis.Itshowssomefeaturesofnaturalboneinbothcompositionandmicrostructure.Andthecollagenmolecularsandthenano-crystalhydroxyapatiteassembleintoultrastructuresimilartonaturalbone.Itpossessesporousstructurewithporosityfrom100μmto500μmaftermixedwithPLA(polylacticacid).　　……

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简介：这份报纸论述nanometer-CeO2的影响的比较研究(tribological和锂的润滑性质上的nano-CeO2)和温度润滑。nanocrystals的形态学和结构分别地借助于传播电子显微镜学(TEM)和X光检查衍射(XRD)被描绘。磨擦并且穿测试在磨擦上被进行并且穿测试者。有nanometer-CeO2的增加的锂油脂举办的结果表演更好减少磨擦并且反穿性能比基础油脂的。当在油脂的添加剂是0.6时?wt%，磨擦系数(COF)并且穿疤直径(WSD)在28%和13%减少分别地与基础油脂作比较。有0.6的基础油脂和油脂?wt%nanometer-CeO2拥有最低平均COF并且在50点穿宽度?????|

简介：纳米大小的钇铝石榴石(钇铝柘榴石)粉末被与铵氢碳酸盐把一起沉淀方法用作综合一急躁。当碘在分别地，在答案的Y3+和Al3+的起始的集中在0.018和0.03mol/L被设置的条件和pH=8上在一起沉淀过程被介绍时，结果显示一位极其松开的钇铝柘榴石先锋被获得。因而，在在为2h的1173K的锻烧与30nm和更好的sinterability的一种平均谷物尺寸由monodispersed粒子组成以后，产生钇铝柘榴石搽粉。现在的结果显示修改一起沉淀方法，与是的碘添加剂，比常规一起沉淀方法优异，综合极其细小的钇铝柘榴石粉末。

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简介：不同尺寸的喷雾器被一个安德森空气刺绣花样收集观察黑碳(BC)的详细形态学与另外的伴随的喷雾器化学上被分开的喷雾器，用与一个精力DispersiveX光线分光计(SEM-EDX)装备的一台扫描电子显微镜。结果显示大多数BC喷雾器是在直径并且与同类的表面的大约50nm的球形的粒子。结果也证明这些粒子与另外的喷雾器或与自己一起聚集形成更大在测微计范围聚结。这些50-nmBC球形的粒子的形状被发现很类似于免除石油动力的车辆的内燃机的BCparticles的。这些球形的BCparticles被显示与发现帮助usingMatrix的激光解吸附作用/电离蒂米夫莱特·马斯·斯佩克特罗梅特里(MALDI-TOF-MS)的以前报导的fullerenes不同。

简介：IntheprocessofsynthesisofnanometerSiCprecursorswithsol-gelofSiO2andlignin,theproductsofallsizesrequiredcanbecontrolledbytheconcentrationofreac-tants,pH,temperature,ractionandageingtime,andsoon.Thebestconditionsinthisreserchare:theconcentrationofNa2SiO3andorganicmattersare4.50%and26.4%respectively,pH=3.3,T=65℃，ageingtimeis30min,driedat150℃，thesizeofSiCprecursorsisabout2.0μm。

简介：为在水样品的踪迹水银的分析的一个新方法被开发，基于用象由冷蒸汽的稳固的阶段提炼之物和决心的修改dithizone的纳米钛二氧化物(TiO2)的preconcentration/separation的联合原子吸附spectrometry(CVAAS)。Dithizone与酒精被溶解并且在缩放nano的TiO2粉末的表面上装载了由激动人心。修改dithizone的nanoparticles上的Hg2+的静态的吸附行为详细被调查。为Hg2+的优秀吸附比率能与15min，和3.5摩尔的5mL的一摆动时间在78的pH范围被获得，这被发现

简介：TiO2nanoparticleswithdifferentphasesarepreparedbyhydrolysisoftitaniumtetrabutoxideinthepresenceofHCl.ThecompositionandmicrostructureoftheresultingsamplesarestudiedbyXRDandTEM.TheseresultsshowthattherangeofparticlesizeofTiO2isfrom20to30nm.ThemechanismofTiO2photocatalysisreactionhasbeendiscussedextensively.PhotocatalyticactivitiesofnanometerTiO2arealsoevaluatedbydegradationofthecrystalvioletsolution.ExperimentalresultsindicatethatthesynergisticactionofH2O2andultrasonicwavegreatlyenhancesphoto-catalyticreactionofTiO2.