蝶翅二维光子晶体结构Y2O3:Eu3+的仿生制备

以自然界中多种多样、复杂精细的生物结构为模板，即通过生物模板法,可制备出具有类似结构的人工材料以提高材料性能或探索材料新的性质。本研究以具有精细二维光子晶体结构的绿斑德凤蝶(Papilio epiphorbas)鳞片为模板,采用以水溶胶凝胶为前驱体的生物模板法成功制备出具有精细二维光子晶体结构的Y2O3:Eu3+荧光体。场发射扫描电镜对仿生Y2O3:Eu3+进行了结构表征,证明仿生Y2O3:Eu3+可以完好地复制蝴蝶鳞片的二维光子晶体结构;采用激光共聚焦显微拉曼光谱仪对仿生Y2O3:Eu3+进行了光致发光测试,证明Eu3+充分掺杂使荧光体产生了特征荧光。通过水溶胶前驱体工艺和水溶液前驱体工艺的对比研究,证明了以水溶胶为前驱体的生物模板法在制备精细结构材料上的优势,对精细结构材料的生物模板法制备具有重要参考价值。

Biomimetic fabrication of 2D photonic Y2O3:Eu3+ phosphor templated from butterfly wing scales

Using the natural intricate and delicate structures in biology as templates,i.e.biotemplation,the artificial analogue could be fabricated for improving the properties of novel materials.The green wing scales of the butterfly Papilio epiphorbas with intricate two dimensional photonic crystal(2D PhC) structure were adopted as templates to fabricate the 2D PhC Y2O3:Eu3+ phosphor through the aqueous sol-gel method.Field emission scanning electron microscopy(FE-SEM) demonstrated that the biomimetic Y2O3:Eu3+ could well duplicate the 2D PhC structure of butterfly scales.Emission spectra of the biomimetic Y2O3:Eu3+ tested via Laser-focused Raman microspectrometer confirmed that Eu3+ was efficiently dopped into the Y2O3 matrix and the target biomimetic material was obtained.The experimental contrast of fabrication routes with aqueous sol-gel precursor and water solution precursor indicated the advantages of the aqueous sol-gel method in fabricating delicate materials through biotemplation and thus could provide significant reference.