Light‐Activated Upconverting Spinners,Advanced Optical Materials

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Light‐Activated Upconverting Spinners
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-03-30 , DOI: 10.1002/adom.201800161
Paloma Rodriguez-Sevilla ₁ , Tianli Lee ₂ , Liangliang Liang ₂ , Patricia Haro-González ₁ , Ginés Lifante ₁ , Xiaogang Liu ₂ , Daniel Jaque _{1,

3}

Affiliation

Rare earth doped upconverting particles (UCPs, capable of efficient infrared‐to‐visible light conversion) have played a fundamental role in the development of up‐to‐date photonics. Thanks to their unique combination of properties (high brightness, superior spectral and intensity stabilities, and high biocompatibility) old dreams have become possible such as obtaining intracellular dynamical images or remote measurement of temperature in the nanoscale. In this work, it is demonstrated how a rarely considered property of UCNPs, their intrinsic optical birefringence, expands their multifunctionality by converting them into fully controlled, optically activated luminescent spinners. Thanks to the luminescence‐based thermal sensing ability of upconverting spinners, it is possible, by comparison between experimental data and numerical modeling, to explain the supralinear behavior of spinning rate with optical power. The complete understanding of rotation dynamics allows the use of UCPs as mechanical microthermometers with thermal sensitivities larger than those traditionally achieved by luminescence‐based thermometry. Experimental demonstration of the potential use of UCPs as remote light‐activated microrotors is also provided. Results included in this work constitute the first step toward the overcoming of new challenges in photonics including those raising in modern biophotonics and colloidal science.

中文翻译：

光激活的上变频微调器

稀土掺杂的上转换粒子（UCP，能够有效地将红外光转换为可见光）在开发最新的光子学中起着根本性的作用。由于它们独特的特性组合（高亮度，出色的光谱和强度稳定性以及高生物相容性），使旧梦成为可能，例如获得细胞内动态图像或远程测量纳米级温度。在这项工作中，证明了UCNPs很少考虑的特性（其固有的光学双折射）如何通过将它们转换为完全受控的，光学激活的发光微调器来扩展其多功能性。借助上转换微调器的基于发光的热感应功能，可以通过比较实验数据和数值模型来实现，用光功率解释纺丝速率的超线性行为。对旋转动力学的完全理解允许将UCP用作具有比传统的基于发光的测温法更大的热灵敏度的机械微温度计。还提供了将UCP用作远程光激活微转子的潜在实验证明。这项工作中包含的结果构成了克服光子学新挑战（包括现代生物光子学和胶体科学中提出的挑战）的第一步。还提供了将UCP用作远程光激活微转子的潜在实验证明。这项工作中包含的结果构成了克服光子学新挑战（包括现代生物光子学和胶体科学中提出的挑战）的第一步。还提供了将UCP用作远程光激活微转子的潜在实验证明。这项工作中包含的结果构成了克服光子学新挑战（包括现代生物光子学和胶体科学中提出的挑战）的第一步。

更新日期：2018-03-30

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