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透明β-NaYF4：Yb,Tm/PMMA 纳米复合材料的制备及其光学性能
上转换发光 掺杂浓度 核壳结构 NaYF4
2014/3/15
采用高温溶剂热法制备了一系列不同Yb3+掺杂浓度的上转换发光纳米粒子β-NaYF4：Yb，Tm和核壳结构的β-NaYF4：Yb，Tm@β-NaYF4：Yb纳米粒子。采用X射线衍射（XRD）、场发射扫描电镜（FESEM）、光致发光（PL）谱对材料的物相结构、形貌特征和发光性质进行了表征和研究，并特别研究了温度对材料发光性能的影响。结果表明：保持Tm3+浓度不变，随着Yb3+掺杂浓度的增加，β-NaY...
Testing the diffusion hypothesis as a mechanism of self-healing in Disperse orange 11 doped in PMMA
hypothesis self-healing
2011/9/1
In this work, we show that reversible photodegradation of Disperse Orange 11 doped in PMMA is not due to dye diffusion – a common phenomenon observed in many dye-doped polymers. The change in linear a...
生物分析是微流控芯片分析最具进一步发展及商品化前景的分支领域之一。报道了基于聚甲基丙烯酸甲酯(PMMA)微流控芯片DNA分析系统的研制。采用简易热压法自制的PMMA芯片，以小型光纤式激光诱导荧光为检测器，以四触点可切换1 800 V高压电源为电驱动系统，以2%羟乙基纤维素(HEC)为筛分介质，通过用于DNA分析的TO-PRO-3荧光染料和激光诱导荧光检测器670 nm截止滤光片的选择，构建了微流控...
Effect of Development Time on Polymer Phase Separation in a PMMA Resist
e-beam surface roughness PMMA phase separation develop time
2010/4/12
Developer composition type and development technique are known to influence surface and edge roughness in polymethylemethacrylate (PMMA); and it is during development, we believe, that the result is m...