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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Fourier Transform Surface Plasmon Resonance of Magnetic Gyro-Nanodisks: Magnetic modulation and viscosity measurement at a localized area

등록일
2019년 2월 14일 14시 49분 27초
접수번호
4463
발표코드
MAT.P-516 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 19일 (금요일) 11:00~12:30
발표형식
포스터
발표분야
Material Chemistry
저자 및
공동저자
Sang Baek Jung, Seongkeun Ih, Dajeong Kim, Jeongwon Kim, Sungho Park*
Department of Chemistry, Sungkyunkwan University, Korea
2-D noble metallic nanoparticles with localized surface plasmon resonance (LSPR) have attracted lots of attention in the field of therapeutics as well as sensors due to their unique properties and extensive applicability. Herein, we propose that the fabrication and application of magnetic modulatable and plasmonically active gyro-nanodisks(GNDs) for Fourier transform surface plasmon resonance (FTSPR) based viscosity sensing. These GNDs were precisely fabricated using the electrochemical deposition method with porous anodized alumina templates. Since these GNDs contain two plasmonically-active thin Au disks at each end, as well as the middle Ni segment responsive to an external magnetic field, periodic extinction signals can be generated under an external rotating magnetic field, which is converted from time domain to frequency domain using Fourier transformation. Moreover, an external magnetic field provided good remote control of the angular velocity and shear force, all of which is induced by the external rotating magnetic field which is controllable. Furthermore, Terminal frequency, defined as the available last signal frequency, is generated when the angular velocity is too high because of resistive forces between GND surface and fluid, the extinction of frequency signal decreased gradually because a certain portion of GNDs can’t follow the rotating magnetic field. To understand and investigate their behavior enables us to study the viscosity of fluid (i.e the friction between GNDs and fluid.) As a proof of concept, a glycerol-water mixture was used as a variation of viscosity. These GNDs using FTSPR detected not only the viscosity of the bulk system of fluid but also localized fields at a micro-scale.

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