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    • 5. 发明授权
    • Apparatus for measuring nanoparticles
    • 用于测量纳米颗粒的装置
    • US08274654B2
    • 2012-09-25
    • US12663772
    • 2007-06-13
    • Yukihisa Wada
    • Yukihisa Wada
    • G01N15/02G01N21/00
    • G01N21/4788G01N15/0211G01N2015/0038G01N2015/0216
    • A dielectric sheet 3 is arranged between a pair of electrodes 2a and 2b for forming an electric field in a cell 1 that stores therein a sample having particles dispersed movably in a medium, the dielectric sheet 3 being formed to include multiple mutually parallel slits 3a to form a diffraction grating, and a parallel light flux is applied to the diffraction grating to generate diffracted light. A gradient electric field in the vicinity of the slits 3a generated by applying a voltage between the electrodes 2a and 2b causes the particles P to migrate in such a manner as to cover the slits 3a or away from the slits 3a and thereby the contrast of the diffraction grating to vary, and whereby the diffusion coefficient and/or size of the particles P can be calculated from the temporal change of the diffracted light when the particles diffuse freely after stopping the application of the voltage. In this measurement apparatus, the particles P might not migrate toward the electrodes 2a and 2b and are not absorbed there, which can prevent damage of the electrodes 2a and 2b and also the occurrence of an electrode reaction.
    • 在一对电极2a和2b之间设置电介质片3,用于在其中存储有可移动地分散在介质中的颗粒的电池1中形成电场,电介质片3形成为包括多个相互平行的狭缝3a至 形成衍射光栅,并且将平行光束施加到衍射光栅以产生衍射光。 在通过在电极2a和2b之间施加电压而产生的狭缝3a附近的梯度电场使得颗粒P以覆盖狭缝3a或远离狭缝3a的方式迁移,由此, 衍射光栅变化,从而可以在停止施加电压之后颗粒自由扩散时由衍射光的时间变化计算出粒子P的扩散系数和/或尺寸。 在该测定装置中,粒子P不会向电极2a,2b移动,不会吸收,能够防止电极2a,2b的损伤以及电极反应的发生。
    • 6. 发明申请
    • APPARATUS FOR MEASURING NANOPARTICLES
    • 用于测量纳米颗粒的装置
    • US20100177311A1
    • 2010-07-15
    • US12663772
    • 2007-06-13
    • Yukihisa Wada
    • Yukihisa Wada
    • G01N15/02
    • G01N21/4788G01N15/0211G01N2015/0038G01N2015/0216
    • A dielectric sheet 3 is arranged between a pair of electrodes 2a and 2b for forming an electric field in a cell 1 that stores therein a sample having particles dispersed movably in a medium, the dielectric sheet 3 being formed to include multiple mutually parallel slits 3a to form a diffraction grating, and a parallel light flux is applied to the diffraction grating to generate diffracted light. A gradient electric field in the vicinity of the slits 3a generated by applying a voltage between the electrodes 2a and 2b causes the particles P to migrate in such a manner as to cover the slits 3a or away from the slits 3a and thereby the contrast of the diffraction grating to vary, and whereby the diffusion coefficient and/or size of the particles P can be calculated from the temporal change of the diffracted light when the particles diffuse freely after stopping the application of the voltage. In this measurement apparatus, the particles P might not migrate toward the electrodes 2a and 2b and are not absorbed there, which can prevent damage of the electrodes 2a and 2b and also the occurrence of an electrode reaction.
    • 在一对电极2a和2b之间设置电介质片3,用于在其中存储有可移动地分散在介质中的颗粒的电池1中形成电场,电介质片3形成为包括多个相互平行的狭缝3a至 形成衍射光栅,并且将平行光束施加到衍射光栅以产生衍射光。 在通过在电极2a和2b之间施加电压而产生的狭缝3a附近的梯度电场使得颗粒P以覆盖狭缝3a或远离狭缝3a的方式迁移,由此, 衍射光栅变化,从而可以在停止施加电压之后颗粒自由扩散时由衍射光的时间变化计算出粒子P的扩散系数和/或尺寸。 在该测定装置中,粒子P不会向电极2a,2b移动,不会吸收,能够防止电极2a,2b的损伤以及电极反应的发生。
    • 7. 发明申请
    • OPTICAL MEASURING DEVICE
    • 光学测量装置
    • US20090251695A1
    • 2009-10-08
    • US11996057
    • 2006-01-17
    • Naoji MoriyaYuzo NagumoYukihisa WadaNaofumi SakauchiFujio InoueMasahiro TakebeKenji TakuboShinichiro Totoki
    • Naoji MoriyaYuzo NagumoYukihisa WadaNaofumi SakauchiFujio InoueMasahiro TakebeKenji TakuboShinichiro Totoki
    • G01N15/02G01N21/47
    • G01N15/0211G01N21/4788G01N2021/1721
    • Within a container 1 which is storing a sample is generated a regularly arranged electric field distribution by an impression of a voltage upon an electrode pair 2 provided within the container 1, thereby generating diffraction grating formed by a density modulation of particles within the sample within the container 1, there is obtained information upon a diffusion of the particles based upon a temporal change in an extinction process of an intensity of a diffracted light beam obtained by irradiating a light beam upon the diffraction grating formed by the density modulation of the particles, the electrodes 21, 22 constituting the electrode pair 2 are configured to have multiple linear electrode teeth 21a, 22a parallel with each other, the electrodes 21, 22 are arranged such that the electrode teeth 21a of one electrode 21 are inserted between the electrode teeth 22a of the other electrode 22, thereby increasing the width of the diffraction grating formed by the density modulation of the particles, and a ratio of a component of the diffracted light beam thereof included in an entire diffracted light beam is increased to increase sensitivity of a measurement. As a result, there is provided an optical measuring device which can measure the information upon the diffusion of the particles movably dispersed within a medium at a high sensitivity and with an excellent S/N ratio.
    • 在存储样品的容器1内通过设置在容器1内的电极对2上的电压印制产生规则排列的电场分布,从而产生通过在样品内的颗粒的密度调制形成的衍射光栅 容器1根据粒子的密度调制形成的衍射光栅照射光束而获得的衍射光束的强度的消光处理中的时间变化,获得了粒子扩散的信息, 构成电极对2的电极21,22被配置为具有彼此平行的多个线状电极齿21a,22a,电极21,22被布置成使得一个电极21的电极齿21a插入到电极齿22a 另一个电极22,从而增加由t的密度调制形成的衍射光栅的宽度 并且包括在整个衍射光束中的衍射光束的分量的比率增加,以增加测量的灵敏度。 结果,提供了一种光学测量装置,其可以以高灵敏度和良好的S / N比来测量可移动地分散在介质中的颗粒的扩散的信息。