Disclosed is an ion sensor whose electrode (1) is covered with a water-repelling organic chemically adsorbed film (2), which is formed with at least one hole (4) permitting the passage of ions but preventing the passage of biopolymers, (eg proteins in blood) thereby allowing accurate measurement of ion concentrations over a long period. In forming the silane-based chemically adsorbed monomolecular film (2) on the surface of the electrode, a hole dozens of angstroms in diameter is formed on an organic thin film by physically adsorbing the mask compound (3) and then washing it away. The sensor can also be used in a solution containing numerous impurities, and for monitoring ion activities in vivo by implanting it in the body.
本发明公开了一种离子传感器,其电极(1)上覆盖有一层憎
水的有机
化学吸附薄膜(2),该薄膜上至少形成一个孔(4),允许离子通过,但阻止
生物聚合物(如血液中的蛋白质)通过,从而可以长时间精确测量离子浓度。在电极表面形成
硅烷基
化学吸附单分子膜 (2) 时,通过物理吸附掩膜化合物 (3) 然后将其洗掉,在有机薄膜上形成一个直径为几十埃的孔。该传感器还可用于含有大量杂质的溶液中,以及通过植入人体来监测体内离子活动。