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首页> 外文期刊>RSC Advances >Core-shell silica-rhodamine B nanosphere for synthetic opals: from fluorescence spectral redistribution to sensing
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Core-shell silica-rhodamine B nanosphere for synthetic opals: from fluorescence spectral redistribution to sensing

机译：核 - 壳二氧化硅 - 罗丹明B纳米底圈用于合成蛋白石：从荧光光谱再分配到感应

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摘要

Photonic crystals are a unique tool to modify the photoluminescence of light-emitting materials. A variety of optical effects have been demonstrated by infiltrating opaline structures with photoactive media. On the other hand, the fabrication of such structures includes complex infiltration steps, that often affect the opal lattice and decrease the efficiency of light emission control. In this work, silica nanospheres were directly functionalized with rhodamine B to create an emitting shell around the dielectric core. Simple tuning of the microsphere preparation conditions allows selecting the appropriate sphere diameter and polydispersity index approaching 5%. These characteristics allow facile self-assembling of the nanospheres into three-dimensional photonic crystals whose peculiar density of photonic states at the band-gap edges induces spectral redistribution of the rhodamine B photoluminescence. The possibility to employ the new stable structure as sensor is also investigated. As a proof of principle, we report the variation of light emission obtained by exposure of the opal to vapor of chlorobenzene.
机译：光子晶体是改变发光材料的光致发光的独特工具。通过使用光活性介质渗透透光结构来证明了各种光学效应。另一方面，这种结构的制造包括复杂的渗透步骤，其经常影响蛋白石晶格并降低发光控制的效率。在该作品中，用罗丹明B直接官能化的二氧化硅纳米球在介电芯周围产生发射壳。微球的简单调整允许选择适当的球体直径和接近5％的多分散性指数。这些特性允许纳米球的体内组装成三维光子晶体，其在带间隙边缘处的光子状态的特殊密度诱导罗丹明B光致发光的光谱再分布。还研究了使用新的稳定结构作为传感器的可能性。作为原理的证据，我们报告了通过暴露蛋白石对氯苯的蒸气获得的发光的变化。

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  • 来源
    《RSC Advances》 |2020年第25期|共7页
  • 作者

    Lova Paola; Congiu Simone; Sparnacci Katia; Angelini Angelo; Boarino Luca; Laus Michele; Di Stasio Francesco; Comoretto Davide;

  • 作者单位

    Univ Genoa Dipartimento Chim &

    Chim Ind Via Dodecaneso 31 I-16132 Genoa Italy;

    Univ Genoa Dipartimento Chim &

    Chim Ind Via Dodecaneso 31 I-16132 Genoa Italy;

    Univ Piemonte Orientale Avogadro Dipartimento Sci &

    Innovaz Tecnol DISIT INSTM UdR Alessandria Viale T Michel 11 I-15121 Alessandria Italy;

    Ist Nazl Ric Metrol Inr Quantum Res Labs &

    Nanofacil Piemonte Adv Mat Metrol &

    Life Sci Div Str Cacce 91 IT-10135 Turin Italy;

    Ist Nazl Ric Metrol Inr Quantum Res Labs &

    Nanofacil Piemonte Adv Mat Metrol &

    Life Sci Div Str Cacce 91 IT-10135 Turin Italy;

    Univ Piemonte Orientale Avogadro Dipartimento Sci &

    Innovaz Tecnol DISIT INSTM UdR Alessandria Viale T Michel 11 I-15121 Alessandria Italy;

    Univ Genoa Dipartimento Chim &

    Chim Ind Via Dodecaneso 31 I-16132 Genoa Italy;

    Univ Genoa Dipartimento Chim &

    Chim Ind Via Dodecaneso 31 I-16132 Genoa Italy;

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  • 正文语种 eng
  • 中图分类 化学;
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