정우재 교수

This paper presents a facile method for preparation of silica coated monodisperse superparamagnetic microsphere. Herein, monodisperse porous polystyrene-divinylbenzene microbeads were prepared by seeded emulsion polymerization and subsequently sulfonated with acetic acid/H 2 SO 4 . The as-prepared sulfonated macroporous beads were magnetized in presence of Fe 2+ /Fe 3+ under alkaline condition and were subjected to silica coating by sol-gel process, providing water compatibility, easily modifiab

The biogenesis of inorganic/organic composite materials such as bone typically involves the process of templated mineralization. Biomimetic synthesis of bone-like materials therefore requires the development of organic scaffolds that mediate mineralization of hydroxyapatite (HAP), the major inorganic component of bone. Using phage display, we identified a 12-residue peptide that bound to single-crystal HAP and templated the nucleation and growth of crystalline HAP mineral in a sequence- and comp

Designing biomimetic matrices with precisely controlled structural organization that provides biochemical and physical cues to regulate cell behavior is critical for the development of tissue-regenerating materials. We have developed novel liquid-crystalline film matrices made from genetically engineered M13 bacteriophages (viruses) that exhibit the ability to control and guide cell behavior for tissue-regenerating applications. To facilitate adhesion between the viruses and cells, 2700 copies o

We report on a novel method to utilize genetically engineered M13 phages as functional nano building blocks that can form structurally aligned film and fiber matrices for tissue engineering scaffolds. Two- and three-dimensional directionally aligned long range ordered structures were constructed using shearing and polyionic complexation with cationic polymers. Further we have demonstrated that aligned phage-based tissue engineering materials can guide and stimulate the growth of the target fibro

A bead affinity chromatography system, which was based on the photolytic elution method, was integrated into a glass-silicon microchip to purify specific target proteins. CutiCore beads, which were coupled with a photo-cleavable ligand, such as biotin and an RNA aptamer, were introduced into a filter chamber in the microchip. The protein mixture containing target protein labeled with fluorescein isothiocyanate (FITC) was then passed through the packed affinity beads in the microchamber by pressu

As the M13 bacteriophage, which has integrin binding and calcium binding sites, provides topological cues from the nanofibrous shape and biochemical cues from the Arg-Gly-Asp (RGD) sequence attached to the surface of fibrous phage, it has been recommended as a bioactive component for use in bone tissue engineering. However, although it has good biological activities, its low mechanical properties and low processing ability represent major issues that must be overcome before its use as a tissue e

A hybrid scaffold (M13-phage/alginate and PCL) was proposed as a biomedical scaffold.