Patterned binding of functionalized microspheres for optical diffraction-based biosensors
申请人:Kimberly-Clark Worldwide, Inc.
公开号:US06221579B1
公开(公告)日:2001-04-24
The present invention provides an inexpensive and sensitive system and method for detecting analytes present in a medium. The system comprises a diffraction enhancing element, such as functionalized microspheres, which are modified such that they are capable of binding with a target analyte. Additionally, the system comprises a polymer film, which may include a metal coating, upon which is printed a specific, predetermined pattern of a analyte-specific receptors. Upon attachment of a target analyte to select areas of the polymer film, either directly or with the diffraction enhancing element, diffraction of transmitted and/or reflected light occurs via the physical dimensions and defined, precise placement of the analyte. A diffraction image is produced which can be easily seen with the eye or, optionally, with a sensing device.
本发明提供了一种廉价而灵敏的系统和方法,用于检测介质中存在的分析物。该系统包括一种衍射增强元件,例如功能化微球,这些微球被改性以使其能够与目标分析物结合。此外,该系统包括一种聚合物膜,该聚合物膜可以包括金属涂层,在其上印刷了一种特定的、预定的分析物特异性受体图案。当目标分析物附着到聚合物膜的选择区域时,通过分析物的物理尺寸和定义的精确位置,通过透射和/或反射光的衍射发生。产生了一幅衍射图像,可以轻松地用肉眼或可选的感应装置看到。