Detection of Gold Colloid Adsorption at a Solid/Liquid Interface Using Micromachined Piezoelectric Resonators

概要

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Microfabricated piezoelectric resonators have been used in a liquid environment for real time detection of gold colloid adsorption at a solid/liquid interface. Negatively charged gold colloids in suspension in a buffer solution adsorb on the surface of the piezoelectric microresonator passivated with a silicon dioxide layer that has been functionalized with an amino-silane self-assembled monolayer. The mass loading induced by adsorption on the surface of the piezoelectric resonator leads to a change in resonant frequency. Measured frequency shift as a function of time incubation in a colloidal suspension was observed and correlated with the mass of adsorbed gold colloids.
Japan Society of Applied Physicsの論文
2004-01-15