droplet – TechConnect Briefs

Formation and Modeling of Droplet Ejection for Electrohydrodynamic Inkjet Printing

Choi J., Lee S., Son S.U., Sungkyunkwan University, KR

EHD(Electrohydrodynamic) inkjet printing based on electrospray and EHD discharging for tiny droplet/jet is known to be able to generate higher resolution and higher aspect ratio of patterns than the conventional inkjet printing(Lee, 2014). EHD inkjet [...]

Preparation of charged droplets via electro-hydrodynamic spraying of polyelectrolyte solutions for the removal of floating particles with less than 10 um (PM10)

Lee K-I., Lee K., Lee K-I., Lee K., Kim S., Korea Electronics Technology Institute, KR

Ambient air quality tends to be worse due to the particle pollution in the region where the rapid commercialization is going on. Particulate matter (PM) describes fine inhalable particles with the specific diameter and smaller, [...]

Interaction of a millimeter sized droplet on the powder substrates and study of capillarity in porous media flow

Avhad A.G., Tan H., Washington State University, US

Droplet impact on powder materials is a ubiquitous phenomenon in nature and engineering technologies including powder-binder based 3D printing, wet granulation, spray drying, powder coating, agricultural sprays, water erosion of soil, and raindrops landing on [...]

Droplet actuation on a digital microfluidic chip using a 5 volt battery

Rezaei Nejad H., University of British Columbia, CA

This paper presents a circuit using a 5-volt DC battery to actuate droplets on a DMF chip. The output of the circuit is a controllable high voltage, high frequency AC signal which can actuate a [...]

Droplet Dispensing from Open to Close Digital Microfluidics

Rezaei Nejad H., University of British Columbia, CA

There are two types of DMF platforms: open and closed systems. Each platform has its own advantages. For instance, it is easier to access the droplet in the open systems; whereas, the closed system limits [...]

Introducing a Digital Micropump for Driving a Droplet in a Microfluidic Channel

Rezaei Nejad H., University of British Columbia, CA

This paper presents a novel pumping technique which is compatible with both digital and continuous microfluidic platforms. In essence, a target droplet (referred to as the pumped droplet) is pumped by actuating the secondary droplet [...]

Template-Free Single-Step Fabrication of Metal Oxide Hollow Nanospheres and Nanofoams

Jiang X., Changzhou University, CN

Hollow nanospheres and nanofoams possess characteristics such as low density, high surface area and adjustable refractive index that make them attractive to tune their mechanical, optical, electrical, and chemical properties for applications ranging from drug [...]

A Microfluidic Platform for Parallel Synchronization of Multiple Droplets by Ladder-Like Fluidic Network

Lee H., Xu L., Oh K.W., SUNY at Buffalo, US

We present a method for a parallel synchronization of multiple droplets with different concentrations in a continuous flow manner. Our previous device was modified (e.g., a synchronized droplet pairing (n=2) using a ladder-like fluidic network) [...]

The Investigation of Electrostatic Induced Inkjet Printing System for the Ejection of a Stable Micro/Nano Droplet

Choi J., Kim Y.J., Son S.U., Chul An K., Lee S., Sungkyunkwan University, KR

Inkjet printing technology has recently attracted considerable attention for a simple fabrication and advanced pattering process during the past decade. In order to manufacture advanced inkjet printing technology, my team has alternatively proposed and investigated [...]

Electrohydrodynamic Micro-droplet Generation on Both Conducting and Non-conducting Surfaces by Electric Induction

Lee B-S, Lee J-G, Lee B-S, Lee J-G, Cho H.-J., Huh N., Ko C., Samsung Advanced Institute of Technology, KR

There is a rapid growing need of the drop-based delivery of small quantities of bio-functional materials, such as cells. We report a brand-new printing method to generate a single droplet in the range of pL [...]