Nanosensors based on functionalized nanoparticles and surface enhanced raman scattering
    2.
    发明授权
    Nanosensors based on functionalized nanoparticles and surface enhanced raman scattering 有权
    基于官能化纳米粒子和表面增强拉曼散射的纳米传感器

    公开(公告)号:US07301624B2

    公开(公告)日:2007-11-27

    申请号:US10935783

    申请日:2004-09-07

    IPC分类号: G01J3/44

    CPC分类号: G01N21/658 G01J3/44

    摘要: Surface-Enhanced Raman Spectroscopy (SERS) is a vibrational spectroscopic technique that utilizes metal surfaces to provide enhanced signals of several orders of magnitude. When molecules of interest are attached to designed metal nanoparticles, a SERS signal is attainable with single molecule detection limits. This provides an ultrasensitive means of detecting the presence of molecules. By using selective chemistries, metal nanoparticles can be functionalized to provide a unique signal upon analyte binding. Moreover, by using measurement techniques, such as, ratiometric received SERS spectra, such metal nanoparticles can be used to monitor dynamic processes in addition to static binding events. Accordingly, such nanoparticles can be used as nanosensors for a wide range of chemicals in fluid, gaseous and solid form, environmental sensors for pH, ion concentration, temperature, etc., and biological sensors for proteins, DNA, RNA, etc.

    摘要翻译: 表面增强拉曼光谱(SERS)是一种振动光谱技术,利用金属表面提供几个数量级的增强信号。 当感兴趣的分子连接到设计的金属纳米粒子时,可以通过单分子检测限达到SERS信号。 这提供了检测分子存在的超灵敏手段。 通过使用选择性化学成分,金属纳米粒子可以被功能化,以在分析物结合时提供独特的信号。 此外,通过使用诸如比例接收的SERS光谱的测量技术,除了静态结合事件之外,这种金属纳米颗粒可用于监测动态过程。 因此,这种纳米颗粒可用作流体,气体和固体形式的广泛化学品的纳米传感器,用于pH,离子浓度,温度等的环境传感器,以及用于蛋白质,DNA,RNA等的生物传感器。

    Sequencing single molecules using surface-enhanced Raman scattering
    3.
    发明申请
    Sequencing single molecules using surface-enhanced Raman scattering 审中-公开
    使用表面增强拉曼散射测序单分子

    公开(公告)号:US20080239307A1

    公开(公告)日:2008-10-02

    申请号:US11731418

    申请日:2007-03-30

    IPC分类号: G01J3/44

    摘要: A surface-enhanced Raman scattering method and apparatus to sequence polymeric biomolecules such as DNA, RNA, or proteins is introduced. The method uses metallic nanostructures such as, for example, spherical or cylindrical Au or Ag nanoparticles having characteristic lengths of 10-100 nm which when illuminated with light of the appropriate wavelength produce resonant oscillations of the conduction electrons (plasmon resonance). Electric field enhancements of 30-1000 near the particle surface resulting from such oscillations increase Raman scattering cross-sections by about 106-1015 due to the E4 dependence of the Raman scattering, wherein the largest enhancements occur in the gap/junction between novel closely spaced structures as disclosed herein.

    摘要翻译: 引入表面增强拉曼散射方法和用于对聚合物生物分子如DNA,RNA或蛋白质进行排序的装置。 该方法使用金属纳米结构,例如具有特征长度为10-100nm的球形或圆柱形Au或Ag纳米颗粒,当用适当波长的光照射时,会导致传导电子(等离子体共振)的共振振荡。 由于这种振荡导致的颗粒表面附近的30-1000的电场增强使由于E 4引起的拉曼散射横截面增加约10 -6 -10 15 拉曼散射的依赖性,其中最大的增强发生在本文公开的新颖的紧密间隔的结构之间的间隙/接合处。

    Chemical sensor system
    5.
    发明授权
    Chemical sensor system 失效
    化学传感器系统

    公开(公告)号:US06480730B2

    公开(公告)日:2002-11-12

    申请号:US09742775

    申请日:2000-12-20

    IPC分类号: A61B505

    摘要: An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.

    摘要翻译: 描述了用于医疗应用的可植入化学传感器系统,其允许使用在分析物存在下经历尺寸变化的可扩展生物相容性传感器(例如聚合物)来选择性识别分析物。 当聚合物改变尺寸时,可膨胀聚合物结合到电子电路组件中,其改变其性质(例如,频率)。 随着电路改变其特性,外部询问器将信号经皮传递至换能器,并根据测量的电路变化确定分析物的浓度。 本发明可用于糖尿病患者血糖水平的微创监测。

    Saccharide sensing molecules having enhanced fluorescent properties
    6.
    发明授权
    Saccharide sensing molecules having enhanced fluorescent properties 有权
    具有增强的荧光性质的糖感测分子

    公开(公告)号:US06673625B2

    公开(公告)日:2004-01-06

    申请号:US09823522

    申请日:2001-03-30

    IPC分类号: G01N3300

    摘要: The present invention provides formulae for fluorescent compounds that have a number of properties which make them uniquely suited for use in sensors of analytes such as saccharides. The advantageous fluorescent properties include favorable excitation wavelengths, emission wavelengths, fluorescence lifetimes, and photostability. Additional advantageous properties include enhanced aqueous solubility, as well as temperature and pH sensitivity. The compound comprises an aryl or a substituted phenyl botonic acid that acts as a substrate recognition component, a fluorescence switch component, and a fluorophore. Fluorescent compounds are described that are excited at wavelengths greater than 400 nm and emit at wavelengths greater than 450 nm, which is advantageous for optical transmission through skin. The fluorophore is typically selected from transition metal-ligand complexes and thiazine, oxazine, oxazone, or oxazine-one as well as anthracene compounds. The fluorescent compound can be immobilized in a glucose permeable biocompatible polymer matrix that is implantable below the skin.

    摘要翻译: 本发明提供具有多种性质的荧光化合物的配方,使其独特地适用于分析物如糖的传感器。 有利的荧光特性包括有利的激发波长,发射波长,荧光寿命和光稳定性。 其他有利的性质包括提高水溶性,以及温度和pH敏感性。 化合物包括用作底物识别组分的芳基或取代的苯基苯甲酸,荧光开关组分和荧光团。 描述了在波长大于400nm被激发并且以大于450nm的波长发射的荧光化合物,这对于通过皮肤的光学透射是有利的。 荧光团通常选自过渡金属 - 配体络合物和噻嗪,恶嗪,恶唑酮或恶嗪 - 以及蒽化合物。 荧光化合物可以固定在可植入皮肤下面的葡萄糖可渗透的生物相容性聚合物基质中。

    Glucose sensing molecules having selected fluorescent properties
    7.
    发明授权
    Glucose sensing molecules having selected fluorescent properties 有权
    具有选择的荧光性质的葡萄糖感测分子

    公开(公告)号:US06682938B1

    公开(公告)日:2004-01-27

    申请号:US09663567

    申请日:2000-09-15

    IPC分类号: G01N3300

    摘要: An analyte sensing fluorescent molecule that employs intramolecular electron transfer is designed to exhibit selected fluorescent properties in the presence of analytes such as saccharides. The selected fluorescent properties include excitation wavelength, emission wavelength, fluorescence lifetime, quantum yield, photostability, solubility, and temperature or pH sensitivity. The compound comprises an aryl or a substituted phenyl boronic acid that acts as a substrate recognition component, a fluorescence switch component, and a fluorophore. The fluorophore and switch component are selected such that the value of the free energy for electron transfer is less than about 3.0 kcal mol−1. Fluorescent compounds are described that are excited at wavelengths greater than 400 nm and emit at wavelengths greater than 450 nm, which is advantageous for optical transmission through skin. The fluorophore is typically selected from transition metal-ligand complexes and thiazine, oxazine, oxazone, or oxazine-one as well as anthracene compounds. The fluorescent compound can be immobilized in a glucose permeable biocompatible polymer matrix that is implantable below the skin.

    摘要翻译: 使用分子内电子转移的分析物感测荧光分子被设计为在分析物例如糖的存在下显示选择的荧光性质。 所选择的荧光特性包括激发波长,发射波长,荧光寿命,量子产率,光稳定性,溶解度和温度或pH敏感性。 化合物包括用作底物识别组分的芳基或取代的苯基硼酸,荧光开关组分和荧光团。 选择荧光团和开关组分使得电子转移的自由能的值小于约3.0kcal mol -1。 描述了在波长大于400nm被激发并且以大于450nm的波长发射的荧光化合物,这对于通过皮肤的光学透射是有利的。 荧光团通常选自过渡金属 - 配体络合物和噻嗪,恶嗪,恶唑酮或恶嗪 - 以及蒽化合物。 荧光化合物可以固定在可植入皮肤下面的葡萄糖可渗透的生物相容性聚合物基质中。

    Implantable medical sensor system
    10.
    发明授权
    Implantable medical sensor system 失效
    植入式医疗传感器系统

    公开(公告)号:US06201980B1

    公开(公告)日:2001-03-13

    申请号:US09166236

    申请日:1998-10-05

    IPC分类号: A61B505

    摘要: An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.

    摘要翻译: 描述了用于医疗应用的可植入化学传感器系统,其允许使用在分析物存在下经历尺寸变化的可扩展生物相容性传感器(例如聚合物)来选择性识别分析物。 当聚合物改变尺寸时,可膨胀聚合物结合到电子电路组件中,其改变其性质(例如,频率)。 随着电路改变其特性,外部询问器将信号经皮传递至换能器,并根据测量的电路变化确定分析物的浓度。 本发明可用于糖尿病患者血糖水平的微创监测。