Method and apparatus for integrated measurement of the mass and surface charge of discrete microparticles using a suspended mirochannel resonator
    7.
    发明申请
    Method and apparatus for integrated measurement of the mass and surface charge of discrete microparticles using a suspended mirochannel resonator 有权
    用于使用悬浮的微通道谐振器集成测量离散微粒的质量和表面电荷的方法和装置

    公开(公告)号:US20110271747A1

    公开(公告)日:2011-11-10

    申请号:US12799922

    申请日:2010-05-04

    IPC分类号: G01N29/22

    摘要: Measurements of the mass and surface charge of microparticles are employed in the characterization of many types of colloidal dispersions. The suspended microchannel resonator (SMR) is capable of measuring individual particle masses with femtogram resolution. The high sensitivity of the SMR resonance frequency to changes in particle position in the SMR channel is employed to determine the electrophoretic mobility of discrete particles in an applied electric field. When an oscillating electric field is applied to the suspended microchannel, the transient resonance frequency shift corresponding to a particle transit can be analyzed to extract both the buoyant mass and electrophoretic mobility of each particle. These parameters, together with the mean particle density, can be used to compute the size, absolute mass, and surface charge of discrete particles.

    摘要翻译: 测定微粒的质量和表面电荷用于表征许多类型的胶体分散体。 悬浮的微通道谐振器(SMR)能够用飞镖分辨率来测量各个粒子质量。 使用SMR共振频率对SMR通道中粒子位置变化的高灵敏度来确定施加电场中离散粒子的电泳迁移率。 当对悬浮微通道施加振荡电场时,可以分析对应于颗粒运输的瞬态共振频移,以提取每个颗粒的浮力质量和电泳迁移率。 这些参数与平均粒子密度一起可用于计算离散粒子的尺寸,绝对质量和表面电荷。

    Method and apparatus for integrated measurement of the mass and surface charge of discrete microparticles using a suspended microchannel resonator
    8.
    发明授权
    Method and apparatus for integrated measurement of the mass and surface charge of discrete microparticles using a suspended microchannel resonator 有权
    使用悬浮微通道谐振器集成测量离散微粒的质量和表面电荷的方法和装置

    公开(公告)号:US08418535B2

    公开(公告)日:2013-04-16

    申请号:US12799922

    申请日:2010-05-04

    IPC分类号: G01N29/00

    摘要: Measurements of the mass and surface charge of microparticles are employed in the characterization of many types of colloidal dispersions. The suspended microchannel resonator (SMR) is capable of measuring individual particle masses with femtogram resolution. The high sensitivity of the SMR resonance frequency to changes in particle position in the SMR channel is employed to determine the electrophoretic mobility of discrete particles in an applied electric field. When an oscillating electric field is applied to the suspended microchannel, the transient resonance frequency shift corresponding to a particle transit can be analyzed to extract both the buoyant mass and electrophoretic mobility of each particle. These parameters, together with the mean particle density, can be used to compute the size, absolute mass, and surface charge of discrete particles.

    摘要翻译: 测定微粒的质量和表面电荷用于表征许多类型的胶体分散体。 悬浮的微通道谐振器(SMR)能够用飞镖分辨率来测量各个粒子质量。 使用SMR共振频率对SMR通道中粒子位置变化的高灵敏度来确定施加电场中离散粒子的电泳迁移率。 当对悬浮微通道施加振荡电场时,可以分析对应于颗粒运输的瞬态共振频移,以提取每个颗粒的浮力质量和电泳迁移率。 这些参数与平均粒子密度一起可用于计算离散粒子的尺寸,绝对质量和表面电荷。