NOVEL CLINICAL CHEMISTRY SENSING MOTIF

我们将开发新的，简单的，廉价的临床化学传感材料，可用作视觉颜色测试条，灵敏和选择性地报告的浓度和身份的重要分析物，如Pb2+，K+，Hg2+，pH值，Ca2+等，我们将开发廉价的临床测试条，可以浸入体液中，以准确地确定分析物在病人床边。 我们还将开发这些化学传感材料的阵列，这些材料将被连接到光纤束上，用作多通道光极，以同时监测多种分析物。 这些传感材料是基于我们最近开发的智能聚合晶体胶体阵列技术。 这种创新的传感基序利用聚合成丙烯酰胺水凝胶的胶体颗粒的介观周期性阵列。 由于胶体颗粒的周期性阵列，该阵列衍射可见光谱区域中的光。 该材料还含有针对感兴趣的分析物定制的螯合剂。 当分析物结合时，其电荷被固定在丙烯酰胺水凝胶内。所产生的唐南势引起渗透压，其使水凝胶阵列与结合的分析物的浓度成比例地溶胀。 这导致衍射波长的偏移和感知的颜色变化。 衍射波长的变化报告了目标分析物的身份和浓度。 该基序是高度灵活的，并且可以被修饰以感测广泛种类和浓度的生物相关分析物。

We will develop novel, simple, inexpensive clinical chemistry sensing materials which can be used as visual color test strips to sensitively and selectively report on the concentration and identity of important analytes such as Pb2+, K+, Hg2+, pH, Ca2+, etc. We will develop inexpensive clinical test strips which can be immersed in bodily fluids to accurately determine analytes at the patient bedside. We will also develop arrays of these chemical sensing materials which will be attached to fiber optic bundles to be used as multichannel optrodes to simultaneously monitor numerous analytes. These sensing materials are based on the intelligent polymerized crystalline colloidal array technology we recently developed. This innovative sensing motif utilizes a mesoscopically periodic array of colloidal particles polymerized into an acrylamide hydrogel. This array diffracts light in the visible spectral region due to the periodic array of colloidal particles. This material also contains chelating agents tailored for the analytes of interest. When an analyte binds, its charge is immobilized within the acrylamide hydrogel. The resulting Donnan potential causes an osmotic pressure, which swells the hydrogel array in proportion to the concentration of analyte bound. This results in shifts in the diffracted wavelength and in the perceived color changes. The change in the wavelength diffracted reports on the identity and concentration of the target analyte. This motif is highly flexible and can be modified to sense a broad variety and concentration of biologically relevant analytes.