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Nematic liquid crystals used to control photo-thermal effects in gold nanoparticles

机译：向列液晶用于控制金纳米粒子中的光热效应

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摘要

We report on photo-thermal effects observed in gold nanoparticles (GNPs) dispersed in Nematic Liquid Crystals (NLCs). Under a suitable optical radiation, GNPs exhibit a strong light absorption/scattering; the effect depends on the refractive index of the medium surrounding the nanoparticles, which can be electrically or optically tuned. In this way, the system represents an ideal nano-source of heat, remotely controllable by light to adjust the temperature at the nanoscale. Photo-induced temperature variations in GNPs dispersed in NLCs have been investigated by implementing a theoretical model based on the thermal heating equation applied to an anisotropic medium; theoretical predictions have been compared with results of experiments carried out in a NLC medium hosting GNPs. Both theory and experiments represent a step forward to understand the physics of heat production at the nanoscale, with applications that range from photonics to nanomedicine.
机译：我们报告了分散在向列液晶（NLC）中的金纳米颗粒（GNP）中观察到的光热效应。在适当的光辐射下，GNP具有很强的光吸收/散射特性；效果取决于围绕纳米颗粒的介质的折射率，可以通过电或光学方式对其进行调节。这样，系统代表了理想的纳米热源，可以通过光进行远程控制以调节纳米级的温度。通过基于应用于各向异性介质的热加热方程的理论模型，研究了分散在NLC中的GNP中光诱导的温度变化。已将理论预测与在承载GNP的NLC培养基中进行的实验结果进行了比较。理论和实验都代表了向前迈出的一步，以了解纳米尺度上的热量产生的物理原理，其应用范围从光子学到纳米医学。

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  • 来源
    《Emerging liquid crystal technologies XI》|2016年|97690C.1-97690C.9|共9页
  • 会议地点 San Francisco CA(US)
  • 作者

    Luigia Pezzi; Luciano De Sio; Giovanna Palermo; Alessandro Veltri; Tiziana Placido; Maria Lucia Curri; Nelson Tabiryan; Cesare Umeton;

  • 作者单位

    LICRYL (Liquid Crystals Laboratory), Department of Physics University of Calabria, 87036 Arcavacata di Rende (CS), Italy;

    Beam Engineering for Advanced Measurements Company, Winter Park, Florida 32789, USA;

    LICRYL (Liquid Crystals Laboratory), Department of Physics University of Calabria, 87036 Arcavacata di Rende (CS), Italy;

    Colegio de Ciencias e Ingeniera, Universidad San Francisco de Quito, Quito, Ecuador;

    Universita degli Studi di Bari Dip. Chimica, Via Orabona 4, 70126 - Bari, Italy;

    Universita degli Studi di Bari Dip. Chimica, Via Orabona 4, 70126 - Bari, Italy,CNR-IPCF Istituto per i Processi Chimici e Fisici, Sez. Bari, c/o Dip. Chimica Via Orabona 4, 70126 - Bari, Italy;

    Beam Engineering for Advanced Measurements Company, Winter Park, Florida 32789, USA;

    LICRYL (Liquid Crystals Laboratory), Department of Physics University of Calabria, 87036 Arcavacata di Rende (CS), Italy;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NLC; Nanoparticles; thermal effect;

    机译：NLC；纳米颗粒；热效应;

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