Chinese Optics Letters, 2017, 15 (5): 051401, Published Online: Jul. 23, 2018
Laser-accelerated self-assembly of colloidal particles at the water–air interface Download: 942次
140.7010 Laser trapping 350.4855 Optical tweezers or optical manipulation 230.5298 Photonic crystals
Abstract
We experimentally demonstrate that optical tweezers can be used to accelerate the self-assembly of colloidal particles at a water–air interface in this Letter. The thermal flow induced by optical tweezers dominates the growth acceleration at the interface. Furthermore, optical tweezers are used to create a local growth peak at the growing front, which is used to study the preferential incorporation positions of incoming particles. The results show that the particles surfed with a strong Marangoni flow tend to fill the gap and smoothen the steep peaks. When the peak is smooth, the incoming particles incorporate the crystal homogeneously at the growing front.
Mincheng Zhong, Ziqiang Wang, Yinmei Li. Laser-accelerated self-assembly of colloidal particles at the water–air interface[J]. Chinese Optics Letters, 2017, 15(5): 051401.