Research

Colloidal and Interfacial Engineering at LSU

Active Matter

Active matter refers to systems composed of self-moving entities, such as bacteria, synthetic particles, or even animal groups, that can exhibit fascinating individualistic and collective behaviors. Active particles are akin to tiny engines moving on their own at micron and submicron length scales. We delve into the captivating world of directing single-particle active motion using external electromagnetic fields. We focus on understanding the fundamental principles that govern the movement of these self-propelled particles. Through experiments, we explore how various factors, such as particle shape, surface chemistry, and external stimuli, influence their motion and interactions with their environment. Our aim is to uncover the underlying mechanisms that drive these dynamic behaviors, which have implications in fields ranging from nanotechnology to drug delivery systems.

 

Directed Assembly

Directed assembly involves the precise arrangement of individual building blocks, such as colloidal particles or nanoparticles, into well-defined structures and patterns under the influence of external fields or templates. We explore the fascinating realm of controlling particle organization at the micro and nanoscale. Through experimental investigations, we seek to understand the intricate interplay between particle-particle and particle-surface interactions that govern the assembly process. By applying external electromagnetic fields, we can precisely guide the arrangement of these building blocks, resulting in tailored structures with unique properties and functionalities. Our work extends to exploring various applications, including designing advanced materials, developing efficient sensors, and creating microscale actuators. We aim to better understand the principles that underlie directed assembly processes and develop new routes to materials synthesis using bottom-up assembly approach.

 

Microplastics

Microplastics are minuscule plastic particles, typically less than 5 millimeters in size, that have become a concerning environmental issue. In our research group, we aim to understand how these tiny plastic particles respond and interact with environmental stimuli in aquatic ecosystems. As experimentalists, we study the individual and collective behavior of microplastics, exploring how factors like sunlight exposure, chemical composition of plastic, and presence of bacteria influence their movement and distribution. By focusing on interfacial characteristics of particles, we aim to uncover the fundamental principles governing the fate and transport of microplastics in diverse aquatic environments. This knowledge is crucial for assessing their potential impact on marine life and ecosystems, and correspondingly play a critical role in addressing one of the most pressing environmental challenges of our time. As a group, we work towards developing sustainable strategies to mitigate the effects of microplastic pollution and safeguard our aquatic ecosystems.