Trapping and assembling of particles and live cells on large-scale random gold nano-island substrates.
We experimentally demonstrated the use of random plasmonic nano-islands for optical trapping and assembling of particles and live cells into highly organized pattern with low power density. The observed trapping effect is attributed to the net contribution due to near-field optical trapping force and long-range thermophoretic force, which overcomes the axial convective drag force, while the lateral convection pushes the target objects into the trapping zone. Our work provides a simple platform for on-chip optical manipulation of nano- and micro-sized objects, and may find applications in physical and life sciences.
Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Zhiwen
Z
Kang
Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Jiajie
J
Chen
Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Shu-Yuen
SY
Wu
Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Kun
K
Chen
Program of Biochemistry, School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Siu-Kai
SK
Kong
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Ken-Tye
KT
Yong
Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Ho-Pui
HP
Ho