‘고(高)’ 분자시스템: 기술융합(Technology Fusion)의 주역

Delocalized electrocloud Conducting Polymer π-conjugated polymer structure Delocalized electrocloud Preparation of Conducting Polymer – redox reaction - Chemical Doping, Electrochemical Doping, Physical Method - Dopant - Halogen( Br2, I2 etc.), Lewis acid( AsF5, SO3, FeCl3 etc.) protonic acid ( HCl, H2SO4, HClO4 etc.) low (10-9S/cm) high (103S/cm) (polaron)

Poly(phenylene sulfide) Conducting Polymer Polyacetylene Poly(p-phenylene) Poly(phenylene sulphide) Poly(p-phenylene vinylene) Polythiophene Polypyrrole Polyaniline Conduction Band Valence Band S cm-1 105 100 10-5 10-10 10-15 10-20 Metal Polyacetylene Poly(p-phenylene) Poly(phenylene sulfide) Polypyrrole Polythiophene Nylon PVC Polystyrene Polyimide(Kapton) PTFE(Teflon) C O N D U T I G P L Y M E R Semi- conductors X Insulators

Applications of Conducting Polymers Device (diodes, FETs, etc) Electrostatic Discharge(ESD) Electromagnetic Interference (EMI) Shielding Conducting Polymer Interconnecting Wiring Metallization Collosion Protection of Metals Rechargeable Batteries Lithography (Charge dissipators, Conducting resists)

Electronic Paper

전해질로 고체나 겔 형태의 고분자 전해질을 사용 Li-Polymer Battery 리튬 폴리머전지 전해질로 고체나 겔 형태의 고분자 전해질을 사용 - 리튬 이온 폴리머전지

Li-Polymer Battery

Cheap, Plastic Solar Cells

Photorefractive Polymer

Photoresists Lithographic processes Deep - UV : Eximer Laser, KrF (248㎚) → 0.25㎛ line for 256 M DRAM X-ray (~1nm) → 0.1 ㎛ line for >1 Giga DRAM (insol.) (sol.)

Polymeric Materials for Photonics Spatial light modulator Compact Disc Technology (Polycarbonate) The pits : 0.25㎛ deep, 0.5㎛ wide, 3.5㎛ long →control bifringence 2) Nonlinear Optical Materials → switches, modulators, and amplifiers March-Zehnder Interferometer Optical switching

Twisted Nematic Liquid Crystal Display Structure of the dispersed liquid crystal droplets

Organic Light Emitting Diodes

Organic Light Emitting Diodes

Applications of OLED

Nanopore Sensor Applied voltage draws a DNA strand and surrounding ionic solution through a biological nanopore. The various DNA units in the strand block ion flow by differing amounts. In turn, by measuring these differences in ion current, scientists can detect the sequence of DNA units. Simulation allows detailed study to enhance the abilities of these DNA sequencers. Potential applications for NASA missions include astronaut health, life detection and decoding of various genomes.

POLYMER - CNT COMPOSITE                                                                                                                             

Health, Medicine, and Biotechnology → The challenges are great : the rewards are greater. 1) Implants and Medical Devices ; Stable and Biocompatible ex) Artificial kidney. Contact lens, Artificial organs Dental material (PMMA), Catheters etc. 2) Diagnostic Automated clinical analyzer : Surlyn etc. 3) Controllled Drug Release Trans dermal patches (ex: Seasickness patches) Microspheres , pumps, aerosols, contraceptive implants → Diffusion, Erosion or Osmotically controlled systems ex. Procardia XL, Duragesic, Estraderm Nitrosoureas in Anhydride linkage (brain cancer) 4) Biopolymers DNA, RNA, proteins, carbohydrates and lipids in Molecular recognition, Biological motion, Bioelastomers Biocomposites