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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Analytical Chemists I |
| Room No. |
Room C311+C312 |
| Time |
THU 09:38-: |
| Code |
ANAL1.O-12 |
| Subject |
Label-free Optical Biosensor Based on Chemical Interface Damping
Using Gold-nanorods
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| Authors |
SeongWoo Moon, JI WON HA*
Department of Chemistry, University of Ulsan, Korea
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| Abstract |
We studied the optical properties of gold nanorods using a darkfield microscope(DF) and a scanning electron microscope(SEM). The existing LSPR based biosensor was a method of sensing by the shift of the SPR peak when the target molecule was attached. However, the dielectric constant of the surrounding medium affects this sensing method. So, we propose a label-free plasmon-based biosensor that is sensitive to the adsorption of biomolecules without being disturbed by the dielectric constant of the surrounding medium. When thiol is attached to gold nanorods, wavelength shifts and FWHM (Full Width at Half Maximum) are increase. This is called chemical interface damping(CID). As the line width increases, sensing becomes possible without being affected by the dielectric constant. We propose a biosensing method based on CID by confirming the change of the optical characteristics according to the aspect ratio and the broadening of the plasmon line width of the rod-shaped gold nanoparticles by using three kinds of gold nanorods having different aspect ratios. |
| E-mail |
tjddn806@naver.com |
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120th General Meeting of the KCS