122nd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Material Chemists
Room No. Room 322
Time THU 09:56-:
Code MAT.O-9
Subject Reversible Switching Nanoscale Sensor for Real Time Tracking
Authors Myoungsoo Han, SeoYeah Oh, Jihyeon Park, Jiwon Kim*
School of Integrated Technology, Yonsei University, Korea
Abstract In order to accurately – selectively and sensitively – detect target material within a small space (e.g. blood vessel), a nanoscale sensor with high density integration is required. Nanomaterial is a good candidate since it has many detection sites in a localized space; however, reversible reaction between target material and detection sites are still rare with short response time. Herein, we designed nanoscale sensors via gold nanoparticles (AuNPs) functionalized with 11-mercaptoundecanoic acid (MUA) and N,N,N-trimethyl 11-mercaptoundecyl ammonium (TMA). MUA and TMA ligands (or mixed) functionalized AuNPs (MUA/TMA AuNPs) can change surface charges according to surrounding pH change which can be easily recorded in real time by ζ-potential (ca. 20 mV in acid condition of pH ~ 3.0 and ca. -30 mV in basic condition of pH ~ 11.0). For real time detection, dilution and separation models were designed in order to minimize accumulation of information particles around the sensor. As a result, we could develop reversible switching nanoscale sensor which can read out dynamic signals in real time giving us more accurate information and can possibly be applied in nanoscale communication systems.
E-mail m-s_han@yonsei.ac.kr