Dynamics of colloids in phase separation

Our ability to understand and control interfacial phenomena on nano- to micro- scale is of extreme importance for efficient extraction, separation, processing and recycling of natural resources. Paraffinic froth treatment in oil sands extraction relies on strong colloidal association between water droplets, fine particles and aspaltene precipitates to produce bitumen of high quality. However, it remains challenging to quantitatively understand the dynamics of early stage phase separation in multicomponent liquid systems, due to the very small length scale, short time scale and complexity in chemical compositions. In this project, we will make use of state-of-the-art experimental technique and comprehensive numerical simulation approach to investigate microscopic dynamics during early stage phase separation. The findings may be valuable for rational design of solvent mixing process in phase separation. 

Automated Femtoliter Droplet-Based Determination of Oil--Water Partition Coefficient

Xuehua Zhang

Scholarly Refereed Journal

Bouncing Oil Droplet in a Stratified Liquid and its Sudden Death

Xuehua Zhang

Scholarly Refereed Journal

Bouncing behaviors of an oil droplet in a stratified liquid

Xuehua Zhang

Scholarly Refereed Journal

Control of Femtoliter Liquid on a Microlens: A Way to Flexible Dual-Microlens Arrays

Xuehua Zhang

Scholarly Refereed Journal

Controlled addition of new liquid component into surface droplet arrays by solvent exchange

Xuehua Zhang

Scholarly Refereed Journal

Enhanced efficiency and thermal stability of perovskite solar cells using poly (9-vinylcarbazole) modified perovskite/PCBM interface

Xuehua Zhang

Scholarly Refereed Journal

Evaporation-triggered ouzo effect in a Hele-Shaw cell

Xuehua Zhang

Scholarly Refereed Journal

Formation of Polystyrene Microlenses via Transient Droplets from the Ouzo Effect for Enhanced Optical Imaging

Xuehua Zhang

Scholarly Refereed Journal

Gas-vapor Interplay in Plasmonic Bubble Shrinkage

Xuehua Zhang

Scholarly Refereed Journal

Giant and explosive plasmonic bubbles by delayed

Xuehua Zhang

Scholarly Refereed Journal

Microdroplet nucleation by dissolution of a multicomponent drop in a host liquid

Xuehua Zhang

Scholarly Refereed Journal

Morphology of Evaporating Sessile Microdroplets on Lyophilic Elliptical Patches

Xuehua Zhang

Scholarly Refereed Journal

One-Step Nanoextraction and Ultrafast Microanalysis Based on Nanodroplet Formation in an Evaporating Ternary Liquid Microfilm

Xuehua Zhang, Zixiang Wei

Scholarly Refereed Journal

Plasmonic Bubble Nucleation and Growth in Water: Effect of Dissolved Air

Xuehua Zhang

Scholarly Refereed Journal

Plasmonic Nanobubbles in “Armored” Surface Nanodroplets

Xuehua Zhang, Hongying Zhao

Scholarly Refereed Journal

Plasmonic Nanobubbles in “Armored” Surface Nanodroplets

Xuehua Zhang, Hongying Zhao

Scholarly Refereed Journal

Porous supraparticle assembly through self-lubricating evaporating colloidal ouzo drops

Xuehua Zhang

Scholarly Refereed Journal

Sequential Evaporation--Induced Formation of Polymeric Surface Microdents via Ouzo Effect

Xuehua Zhang

Scholarly Refereed Journal

Solvent Exchange in a Hele--Shaw Cell: Universality of Surface Nanodroplet Nucleation

Xuehua Zhang

Scholarly Refereed Journal

Splitting droplets through coalescence of two different three-phase contact lines

Xuehua Zhang

Scholarly Refereed Journal

Surface nanodroplets: formation, dissolution, and applications

Xuehua Zhang

Scholarly Refereed Journal

Ultra-high Density of Gas Molecules Confined in Surface Nanobubbles in Ambient Water

Xuehua Zhang

Scholarly Refereed Journal