The present invention provides materials and devices for immobilizing functional organic bio-molecules through a covalent bond via a thiolate or disulfide monolayer to a metal surface wherein an extra activation step of the surface layer or an activation step of the functional bio-molecules or bio-receptors is avoided. The mono-layer can contain two moieties, one having a group that resist non-specific adsorption and another group that directly reacts with functional groups on the bio-molecules. In addition, poly(ethylene oxide) groups are incorporated in the monolayer surfaces in order to resist the non-specific adsorption and to enhance specific affinity interactions. The invention also provides a sensor device for performing reproducible, sensitive, specific and stable bio-analysis.
本发明提供了通过
硫酸酯或二
硫化物单层共价键将功能性有机
生物分子固定在
金属表面的材料和装置,其中避免了表层的额外活化步骤或功能性
生物分子或
生物受体的活化步骤。单层可以包含两个分子,一个分子中的基团可以抵制非特异性吸附,另一个基团可以直接与
生物分子上的功能基团发生反应。此外,单层表面还加入了聚
环氧乙烷基团,以抵制非特异性吸附并增强特异性亲和性相互作用。本发明还提供了一种传感器装置,用于进行可重复、灵敏、特异和稳定的
生物分析。