Determination of size and refractive index of single gold nanoparticles using an optofluidic chip

• Main Authors: Shi, Yu Zhi, Xiong, Sha, Chin, Lip Ket, Zhang, Jing Bo, Ser, Wee, Wu, Jiu Hui, Chen, Tian Ning, Yang, Zhen Chuan, Hao, Yi Long, Liu, Ai Qun
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2019
• Subjects: Polymers; Chromatography; DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/85408; http://hdl.handle.net/10220/48216
• Institution: Nanyang Technological University

We report a real-time method to determine the size, i.e. diameter, and refractive index of single gold nanoparticles using an optofluidic chip, which consists of a quasi-Bessel beam optical chromatography. The tightly focused (∼ 0.5 μm) quasi-Bessel beam with low divergence (NA ∼ 0.04) was used to t...