Nanoparticle Trapping and Characterization Using Open Microcavities.
Nanoparticle Trapping and Characterization Using Open Microcavities.
复制标题
DOI：
10.1021/acs.nanolett.6b02433
复制
发表时间：
2016-09
期刊：
影响因子：
10.8
通讯作者：
A. Trichet;P. Dolan;D. James;G. Hughes;C. Vallance;J. Smith
中科院分区：
文献类型：
--
作者：
A. Trichet;P. Dolan;D. James;G. Hughes;C. Vallance;J. Smith
纳米粒子在溶液中的表征和捕获对于生物医学、环境和材料科学中的芯片实验室应用非常重要。现在开始出现允许实时进行此类操作和调查的设备。因此，为了在这一领域取得进展，有必要更好地了解纳米粒子与光阱之间的相互作用。在这项工作中，我们提出了一种新的基于开放微腔的纳米镊子。我们表明，通过监测腔模波长偏移的颗粒扩散通过腔，它是可能的，以建立纳米粒子的极化率和摩擦系数。此外，我们的实验提供了一个深刻的洞察纳米粒子和腔模式之间的相互作用。该技术具有陷阱强度和弹簧常数的内置校准，使其在实际应用中具有吸引力。这项工作说明了这种光学微腔在纳米颗粒传感器和芯片实验室设备的未来发展的潜力。
Characterization and trapping of nanoparticles in solution is of great importance for lab-on-a-chip applications in biomedical, environmental, and materials sciences. Devices are now starting to emerge allowing such manipulations and investigations in real-time. Better insights into the interaction between the nanoparticle and the optical trap is therefore necessary in order to move forward in this field. In this work, we present a new kind of nanotweezers based on open microcavities. We show that by monitoring the cavity mode wavelength shift as the particle diffuses through the cavity, it is possible to establish both the nanoparticle polarizability and its coefficient of friction. Additionally, our experiment provides a deep insight in the interaction between the nanoparticle and the cavity mode. The technique has built-in calibration of the trap strength and spring constant, making it attractive for practical applications. This work illustrates the potential of such optical microcavities for future developments in nanoparticle sensors and lab-on-a-chip devices.