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

被引：3

作者：

Pezzi, Luigia ^{[1
]}

De Sio, Luciano ^{[2
]}

Palermo, Giovanna ^{[1
]}

Veltri, Alessandro ^{[3
]}

Placido, Tiziana ^{[4
,5
]}

Lucia Curri, Maria ^{[4
,5
]}

Tabiryan, Nelson ^{[2
]}

Umeton, Cesare ^{[1
]}

机构：

[1] Univ Calabria, Dept Phys, LICRYL Liquid Crystals Lab, I-87036 Arcavacata Di Rende, CS, Italy

[2] Beam Engn Adv Measurements Co, Winter Pk, FL 32789 USA

[3] Univ San Francisco Quito, Colegio Ciencias & Ingn, Quito, Ecuador

[4] Univ Bari, Dip Chim, Via Orabona 4, I-70126 Bari, Italy

[5] CNR, IPCF, Sez Bari, Dip Chim, Via Orabona 4, I-70126 Bari, Italy

来源：

EMERGING LIQUID CRYSTAL TECHNOLOGIES XI | 2016年 / 9769卷

关键词：

NLC; Nanoparticles; thermal effect; REFRACTIVE-INDEXES; MODEL;

D O I：

10.1117/12.2216201

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：9

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