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    • 65. 发明申请
    • ACTIVE PROBE FOR AN ATOMIC FORCE MICROSCOPE AND METHOD OF USE THEREOF
    • 用于原子力显微镜的主动探测器及其使用方法
    • WO00058759A2
    • 2000-10-05
    • PCT/US2000/005450
    • 2000-03-03
    • G01B21/30G01Q10/06G01Q20/02G01Q60/24G01Q60/34G05D3/00G05D3/12G02B
    • G01Q60/34G01Q10/045G01Q10/065Y10S977/849Y10S977/851Y10S977/863Y10S977/869Y10S977/875Y10S977/881
    • An AFM (10) that combines an AFM Z position actuator (16) and a self-actuated Z-position cantilever (20) (both operable in cyclical mode and contact mode), with appropriate nested feedback control circuitry to achieve high-speed imaging and accurate Z-position measurements. The self-actuated cantilever (20) includes a Z-positioning element (36) integrated therewith and an oscillator that oscillates the cantilever (20) at a resonant frequency and at an oscillation amplitude equal to a setpoint value. The AFM includes a first feedback circuit (12) nested within a second feedback circuit (14), wherein the first feedback circuit generates a cantilever control signal in response to vertical displacement of the self-actuated cantilever (20) during a scanning operation, and the second feedback circuit (14) is responsive to the cantilever control signal to generate a position control signal.
    • AFM(10)组合了AFM Z位置执行器(16)和自动Z位置悬臂(20)(均可在循环模式和接触模式下操作)与适当的嵌套反馈控制电路实现高速成像 和精确的Z位置测量。 自动驱动悬臂(20)包括与其成一体的Z定位元件(36)和振荡器,振荡器以共振频率和等于设定值的振荡振幅振荡悬臂(20)。 AFM包括嵌套在第二反馈电路(14)内的第一反馈电路(12),其中第一反馈电路在扫描操作期间响应于自致动悬臂(20)的垂直位移而产生悬臂控制信号,以及 第二反馈电路(14)响应于悬臂控制信号以产生位置控制信号。
    • 66. 发明申请
    • METHOD FOR MEASURING INTRAMOLECULAR FORCES BY ATOMIC FORCE MICROSCOPY
    • 通过原子力显微镜测量分子内力的方法
    • WO00044938A1
    • 2000-08-03
    • PCT/US2000/001647
    • 2000-01-27
    • C12Q1/68G01Q30/20G01Q60/24
    • G01Q60/42Y10S977/853Y10S977/863Y10S977/873Y10S977/881Y10S977/924
    • A method is disclosed for measuring intramolecular forces within a sample compound by providing an atomic force microscope that includes a sample support member and a cantilever. The sample support member has a plurality of protrusions, and each protrusion has an apical substrate region that has been chemically modified to have a sample compound immobilized thereon. The cantilever has a fixed end and a free end, the free end having a surface region that has been chemically modified to have a grasping compound immobilized thereon. To measure intramolecular forces within the sample compound, the relative position and orientation of the cantilever and the sample support member are controlled to select a particular protrusion and to allow a molecule of the grasping compound to bind with a molecule of the sample compound. Then, the relative position and orientation of the cantilever and the sample support member are controlled to vary the distance between the cantilever and the sample support member so that the forces exerted on the cantilever as the distance between the cantilever and the sample support member is varied and as the molecule of the sample compound is stretched between the cantilever and the sample support member can be measured.
    • 公开了一种通过提供包括样品支撑构件和悬臂的原子力显微镜来测量样品化合物内的分子内力的方法。 样品支撑构件具有多个突起,并且每个突起具有经化学修饰以固定其上的样品化合物的顶端基底区域。 悬臂具有固定端和自由端,自由端具有经化学修饰以具有固定在其上的抓握化合物的表面区域。 为了测量样品化合物中的分子内力,控制悬臂和样品支撑构件的相对位置和取向以选择特定的突起并使得抓握化合物的分子与样品化合物的分子结合。 然后,控制悬臂和样品支撑构件的相对位置和取向以改变悬臂和样品支撑构件之间的距离,使得当悬臂与样品支撑构件之间的距离变化时施加在悬臂上的力 并且可以测量样品化合物的分子在悬臂和样品支撑构件之间的拉伸。