资源描述：
《纳米材料双语翻译》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、aPhotoluminescencepropertiesofLaF3:Eunanoparticlespreparedbyrefluxingmethod光致发光性质：镐掺杂的三氟化精纳米粒子的回流制备方法Rareearthions-dopednanostructurematerialshavebeenwidelyinvestigatedbecauseoftheirsharpandintenseemissionoriginatingfromtheelectronictransitionswithinthe4fsh
2、ellofthedopingionsandtheirapplicationsinmanyfields.Incomparisonwiththeconventionaloxide-basedluminescentmaterials,fluoridesareadvantageousasfluorescenthostmaterialsowingtotheirlowvibrationalenergiesandthesubsequentminimizationofthequenchingoftheexcitedstate
3、oftherare-earthions[1].Hence,rareearthions-dopednanostructuralfluorideshaveattractedextensiveinterestsduetotheirpotentialapplicationsinlightinganddisplays12,31,upconverters[3_8],magneticresonanceimaging(MRI)[刃，biologicalfluorescentlabels110I4],opticalamplif
4、iers'^151,transparentglass1161,scintillators"",photoniccrystals^81,etc.Amongthesefluorides,LaF3hostmatrixexhibitsthephotochemicalstability,thebiocompatibility,andtherelativelowcrystallinetemperature,anditsphononenergyisaslowas350cm-f19,201.Rareearthions(Eu3
5、+,Ce3Tb3+,Nd3+,E产，P产，Ho3+,Yb3+,Tm3)dopedLaF3nanoparticles[21_24],LaF3triangularnanoplates[24,25andsilica-coated〔⑼，ororganicligandsf20261modifiedLaF3luminescentnanoparticleshavebeenreportedinliteratures.稀土离了掺杂的纳米结构材料已被广泛研究，因为其尖锐和激烈的排放來源于电子跃迁的4f内壳的掺杂离子和其在许多
6、领域的应用。在与传统的氧化物系发光材料相比，氟化物是有利的，因为由于其低的振动能级和随后的最小化的稀土离了的激发态猝灭，并且是荧光基质材料。因此，稀土离了掺朵的纳米结构氟化物已经吸引了广泛的兴趣，由于其潜在的应用在照明和显示，上变频器，磁共振成像(MRI),生物荧光标记，光放大器，透明玻璃，闪烁晶体，光了晶体等。在这些氟化物中，三氟化鉤基质具有光化学稳定性，生物相容性，和相对较低的结晶温度，它的声子能量低至350cm'1处。地球离子稀土(钩，肺，钛，钱，钳,错，钦，镇，怯)掺杂三氟化澜纳米粒了，三氟化镰J三角
7、形纳米片，和硅涂层，或冇机配体修饰三氟化鋼发光纳米粒子已经被报道文献中。Rareearthions-dopedLaF3atnanoscalecanbesynthesizedbyusingcoprecipitationtechnique111,15single-sourceprecursor(SSP)strategy^4',polyolmethod1221,andhydrothermalmethod*".Veggelandcoworkershavesystematicallyinvestigatedthesy
8、nthesis,surfacemodification,andluminescentpropertiesofrareearthions-dopedLaF3nanoparticlesfl8_211.Usinglanthanidesaltsandsodiumfluorideorammoniumfluorideasstartingmaterials,theysynthesizedthedopedLaF3n
