Research

홈이미지 점 Research

FUNCTIONAL MATERIALS

Researchers

  • Soohyun Kim (Ph.D. candidate)
  • Tian Qiao (Ph.D. candidate)
  • Woojin Choi(Undergraduate)
  • Yujin Ha (Undergraduate)
  • Mirim Ham(Undergraduate)
  • This group's interest focuses on synthesizing functional nano/micro-particles which can be used in energy devices such as solar cell, thermoelectric devices, lithium ion battery and so on. Improving the dispersion stability of nanoparticles in various mediums is essential for those applications. We have discussed why it is difficult to control the stability of nanoparticles in liquids. Our recent studies introduce the surface modification via attachment of organic functional groups on the surface of nano/micro-particles and the surface stabilization by engineering surface charges.



    Figure : Non-aggregated titania nanoparticles coated with organic layer

  • The other focus lies in synthesizing functional resins which can be used in 3D printers (laser-based stereolithography (SLA) and digital light processing (DLP), etc) to fabricate cross-linked architectures with a variety of chemical functionalities. It ranges from acrylate_based UV-curable materials to shape-memory polymers, whose shape can be programmed at a particular temperature and then mechanically altered.


Relevant
Publications

  • 1 Tian Qiao, Soohyun Kim, Wonmok Lee, and Hyunjung Lee*, “Biodegradable and Porous Poly(lacticco-glycolic acid) Microbeads for In vitro Evaluation of Negatively Charged Fluorescent Bacteria”, Macromolecular Research, 2019, 27.3: 321-326
  • 2 Soohyun Kim, Hyunwoo Bark, Seungjin Nam, Hyunjoo Choi, and Hyunjung Lee*, “Control of Electrical and Thermal Transport Properties by Hybridization of Two-Dimensional Tungsten Disulfide and Reduced Graphene Oxide for Thermoelectric Applications”, ACS Sustainable Chem. Eng, 2018, 6, 15487-15493
  • 3 Hyunwoo Bark, Museok Ko, Mijung Lee, Wonmok Lee, Byunghee Hong, and Hyunjung Lee*, “Thermoelectric Properties of Thermally Reduced Graphene Oxide Observed by Tuning the Energy States”, ACS Sustainable Chem. Eng, 2018, 6(6), 7468–7474
  • 4 Kakaraparthi Kranthiraja, Sang Ho Park, Hyunji Kim, Kumarasamy Gunasekar, Gibok Han, Bumjoon J. Kim, Chang Su Kim, Soohyun Kim, Hyunjung Lee*, Ryosuke Nishikubo, Akinori Saeki*, Sung-Ho Jin*, and Myungkwan Son. “Accomplishment of Multifunctional π-Conjugated Polymers by Regulating the Degree of Side-Chain Fluorination for Efficient Dopant-Free Ambient-Stable Perovskite Solar Cells and Organic Solar Cells”, ACS Appl. Mater. Interfaces, 2017, 9 (41), pp 36053–36060
  • 5 Wonmok Lee, Jongseung Yoon, Edwin L. Thomas*, Hyunjung Lee *. “Dynamic Changes in Structural Color of a Lamellar Block Copolymer Photonic Gel during Solvent Evaporation” , Macromolecules, 2013, 46, 6528−6532
  • 6 Young Gon Seo, Min Ah Kim, Hyunjung Lee* and Won Mok Lee*, “Solution Processed Thin Films of Non-Aggregated TiO2 Nanoparticles Prepared by Mild Solvothermal Treatment”, Solar Energy Materials and Solar Cells, 2011, 95, 332-225