Selective Adsorption Of Molecules Research Articles

シクロデキストリンを配合した酸化チタンナノハイブリッド薄膜の分子選択性

シクロデキストリンを配合した酸化チタンナノハイブリッド薄膜の分子選択性

Inverted tapered pillars for mass sensing

Micro and nano resonators have been proposed as mass sensors with very high sensitivity. A special class of resonators, vertical micro-pillars, has been recently introduced with increasing mass detection capability, high sensor density and uniformity and reduced sensitivity to contamination and non-specific target absorption. Herein, we describe a newly conceived vertical micro-resonator with inverted tapered shape. With sensitivity of 33 Hz/fg and the reproducibility of 0.1 fg. The proposed geometry allowed the development of a new self-calibrating functionalization strategy which also makes our pillars very suitable for passing from liquid to dry environment. Selective adsorption of molecules is demonstrated and the application of the detector for a test target made of a self assembled monolayer of organic molecules is reported. The measured mass of the adsorbed molecules is 64 fg which corresponds to a density of 6.1 × 10 14 mol/cm 2.