Welcome to the BioSM Lab

Soft matter and biological physics are closely related branches of physics because many parts of biological cells and tissues consist of soft matter systems. Using theoretical modelings and computer simulations our lab focuses primarily on understanding of the underlying physical mechanisms of biological systems from molecular to cellular scales and investigating free energy landscapes and conformational changes of polymer complexes. We are also interested in modeling and simulations of aqueous electrolytes and identifying mechanism of ion transport. Current research topics include membrane proteins structure & function, functional & mechanical properties of biological soft matter, cell-penetrating peptides(CPPs) & drug delivery, ion transport in water-in-salt electrolytes(WISEs), etc.

Group Members

Principal Investigator


Seungho Choe

Associate Professor of Energy Science & Engineering

Current Projects

Cell-Penetrating Peptides(CPPs) and Drug Delivery

Cell-Penetrating Peptides(CPPs) can deliver pharmalogically active molecules (e.g., proteins, plasmid-DNA, liposomes, and also nanoparticles) into cells, and thus they have great potential as future therapeutics. However, the uptake mechanisms are still debating.

Functional and Mechanical Properties of Biological Soft Matter

In order to understand mechanisms of various biological functions at molecular scales it is crucial to identify functional and mechanical properties of basic structures, such as peptides, DNAs, membranes(bilayer or monolayer), etc.

Ion Transport in Water-In-Salt Electrolytes (WISEs)

Recently, water-in-salt electrolytes (WISEs) have attracted much attention due to their wider electrochemical stability window than conventional dilute aqueous electrolytes. WISEs have been used in batteries and supercacitors, however, the ion transport mechanism has not been fully understood.

Light-harvesting: Mechanisms of Energy Transfer

Light-harvesting is one of research areas which studies materials and molecules that capture photons of solar light. This includes studies to better understand the light-harvesting properties of photosynthetic organisms or those of artificial systems that are designed to promote photochemical reactions.

Membrane Proteins Structure and Function

Membrane proteins(e.g, enzymes, receptors, ion channels, transporters, etc.) play crucial roles in all organisms, and they are the major drug targets for pharmaceuticals. Our general goal is to understand functional properties of various membrane proteins and to identify suitable drugs to control their biological functions.

Modeling and Simulations of Self-Assembly of Polymers

The self-assembly of polymers is one of emerging fields within material sciences, offering many potential applications in nanotechnology as well as in nanobiotechnology. It is necessary to investigate the energy landscape between the self-assembled polymers, and to explore the fate of these polymers and how the final morphology can be obtained.

Molecular Dynamics Studies of Polyelectrolyte-Polyampholyte Complexes

Polyelectrolytes(PEs) are polymers carrying either positively or negatively charged ionizable groups while polyampholytes(PAs) are charged polymers with both positively and negatively charged groups. The adsorption of PEs and PAs onto charged chains and surfaces has been extensively studied for a long time because of its importance in biology, materials science, soft matter research, etc.

Path Sampling of Rare Events

Path sampling approaches can enhance the efficiency of simulating rare events, e.g, protein folding, protein (un)binding, cellular signaling, etc. Weighted Ensemble (WE) method has been known for one of powerful and flexible path sampling techniques.

Theoretical Modeling of a Cell Division and the Min System

In E. coli the Min protein system, which consists of Min C, Min D, and Min E proteins, plays an important role in positioning the cell division. We have been working on partial differential equations which describe the Min system.

Recent Posts

Our group was awarded computing time on supercomputers@KISTI.

Open Positions

Our group is seeking talented and motivated students (intern, Master, PhD). Please contact us if you are interested.


  • schoe[at]dgist.ac.kr
  • 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988 Rep. of Korea