Massive ordering and alignment of cylindrical micro-objects by photovoltaic optoelectronic tweezers.
Massive ordering and alignment of cylindrical micro-objects by photovoltaic optoelectronic tweezers.
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DOI：
10.1364/ol.43.000030
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发表时间：
2018
期刊：
影响因子：
3.6
通讯作者：
I. Elvira;J. F. Muñoz-Martínez;Á. Barroso;C. Denz;J. Ramiro;A. García-Cabañes;F. Agullo-lopez;M. Carrascosa
中科院分区：
文献类型：
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作者：
I. Elvira;J. F. Muñoz-Martínez;Á. Barroso;C. Denz;J. Ramiro;A. García-Cabañes;F. Agullo-lopez;M. Carrascosa
用于操纵和捕获微米和纳米物体的光学工具是纳米和生物技术中许多应用的基本问题。这项工作报告使用这样一种方法，称为光伏光电子镊子，定向和组织圆柱形微晶，特别是细长的沸石L，在Fe掺杂铌酸锂晶体板的表面上。通过本体光伏效应产生的力和扭矩已经实现了定向沸石的图案。沸石分子筛的取向图案与衬底表面平行或垂直高度依赖于光分布和晶体构型的特征。此外，经常观察到长度达100 μm的沸石介电电泳链。讨论了沸石捕获和取向的实验结果，并与倏逝光伏电场和介电泳电位的理论模拟进行了比较。他们展示了光电光伏方法的显着能力，以定向和图案各向异性微晶。图案化和排列的组合作用提供了一种独特的工具来制备具有潜在应用的功能性纳米结构，其在诸如非线性光学或等离子体激元等各种领域中具有潜在应用。
Optical tools for manipulation and trapping of micro- and nano-objects are a fundamental issue for many applications in nano- and biotechnology. This work reports on the use of one such method, known as photovoltaic optoelectronics tweezers, to orientate and organize cylindrical microcrystals, specifically elongated zeolite L, on the surface of Fe-doped LiNbO3 crystal plates. Patterns of aligned zeolites have been achieved through the forces and torques generated by the bulk photovoltaic effect. The alignment patterns with zeolites parallel or perpendicular to the substrate surface are highly dependent on the features of light distribution and crystal configuration. Moreover, dielectrophoretic chains of zeolites with lengths up to 100 μm have often been observed. The experimental results of zeolite trapping and alignment have been discussed and compared together with theoretical simulations of the evanescent photovoltaic electric field and the dielectrophoretic potential. They demonstrate the remarkable capabilities of the optoelectronic photovoltaic method to orientate and pattern anisotropic microcrystals. The combined action of patterning and alignment offers a unique tool to prepare functional nanostructures with potential applications in a variety of fields such as nonlinear optics or plasmonics.