Numerical simulation of nanoparticle pattern fabricated by electrostatic spray deposition--颗粒学报PARTICUOLOGY

Wei, W., Gu, Z., Wang, S., Fukuda, T., Kase, K., Ju, J., Yamagata, Y., & Tajima, Y. (2013). Numerical simulation of nanoparticle pattern fabricated by electrostatic spray deposition. Particuology, 11(1), 20–24. https://doi.org/10.1016/j.partic.2012.05.004

Numerical simulation of nanoparticle pattern fabricated by electrostatic spray deposition

Wei Wei ^a, Zhaolin Gu ^a, Sheng Wang ^b *, Takeshi Fukuda ^c, Kiwamu Kase ^b, Jungmyoung Ju ^b, Yutaka Yamagata ^b, Yusuke Tajima ^b

a Xi’an Jiaotong University, 28, Xianning West Road, Xi’an, Shaanxi 710049, China
b RIKEN Institute, 2-1 Hirosawa, Wako City, Saitama 351-0198, Japan
c Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan

10.1016/j.partic.2012.05.004

Volume 11, Issue 1, February 2013, Pages 20-24

Received 6 December 2011, Revised 27 March 2012, Accepted 30 May 2012, Available online 31 August 2012.

E-mail: swang@riken.jp

Highlights

► Solution dielectric constant effect on electrospray deposition was simulated by Lagrangian model.

► Increasing solvent dielectric constant and applied voltage made spray area wider while no mask.

► Controlling focusing by changing surface charge density on mask was confirmed.

Abstract

Electrospray deposition (ESD) as a patterning method of nanoparticles deposited on a substrate has attracted much attention due to several advantages over other methods. However, obtaining an optimum ESD processing condition for nanoparticle pattern relies much on trial experiments because of the lack of reliable numerical simulation. In this study, the deposition characteristics of nanoparticle generated by electrospray were investigated by using a three-dimensional Lagrangian model. Three important process parameters, including solution dielectric constant, applied voltage and surface charge density on mask were considered by fixing the geometrical parameters of the ESD device. Simulation result showed that under the condition of without a mask, the spray diameter increases with increasing solvent dielectric constant, and higher applied voltage makes the spray area wider. Controllability of focusing by changing surface charge density on the mask was confirmed: higher surface charge density on the mask results in more focused deposition. Validity of the numerical simulation developed in this study was verified by comparison with experimental data.

Graphical abstract

Keywords

Nanoparticle pattern; Electrospray deposition; Deposition characteristics; Lagrangian model

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