公开(公告)号：US20190324026A1

公开(公告)日：2019-10-24

申请号：US16455506

申请日：2019-06-27

Applicant: Advanced Liquid Logic, Inc. ,  Duke University

Inventor： Ramakrishna Sista ,  Vamsee K. Pamula ,  Michael G. Pollack ,  Vijay Srinivasan ,  Allen E. Eckhardt ,  Richard B. Fair

IPC: G01N33/543 ,  B01L3/00 ,  G01N27/447 ,  C12M1/12

Abstract: A method comprising effecting a change in a shape of a droplet, wherein the droplet is disposed over a substrate in sensing proximity to a sensor and the droplet has a starting surface area exposed to the sensor; and producing an expanded surface area of the droplet in the sensing proximity exposed to the sensor, wherein the expanded surface area exposed to the sensor is greater than the starting surface area exposed to the sensor.

公开(公告)号：US20190011443A1

公开(公告)日：2019-01-10

申请号：US16132175

申请日：2018-09-14

Applicant: Advanced Liquid Logic, Inc.

Inventor： Vamsee K. Pamula ,  Michael G. Pollack ,  Ramakrishna Sista ,  Arjun Sudarsan

IPC: G01N33/543 ,  B03C1/28 ,  B03C1/30 ,  B03C5/00 ,  B01F11/00 ,  B01F13/00 ,  B03C1/02 ,  B01L3/00 ,  C12N15/10 ,  G01N33/561 ,  B01L7/00 ,  G01N35/10

CPC classification number: G01N33/54333 ,  B01F11/0071 ,  B01F13/0071 ,  B01F13/0076 ,  B01L3/502715 ,  B01L3/502761 ,  B01L3/502784 ,  B01L3/502792 ,  B01L7/52 ,  B01L7/525 ,  B01L2200/027 ,  B01L2200/0647 ,  B01L2200/0668 ,  B01L2300/0654 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0864 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/0421 ,  B01L2400/0424 ,  B01L2400/0427 ,  B01L2400/043 ,  B01L2400/0436 ,  B01L2400/0442 ,  B03C1/02 ,  B03C1/288 ,  B03C1/30 ,  B03C5/005 ,  B03C2201/18 ,  B03C2201/26 ,  C12N15/1013 ,  G01N33/561 ,  G01N2035/1046 ,  Y10T436/11 ,  Y10T436/25 ,  Y10T436/25625 ,  Y10T436/2575

Abstract: Methods are provided for separating magnetically responsive beads from a droplet in a droplet actuator. Droplet operations electrodes and a magnet are arranged in a droplet actuator to manipulate a bead-containing droplet and position it relative to a magnetic field region that attracts the magnetically responsive beads. The droplet operations electrodes are operated to control the droplet shape and transport it away from the magnetic field region to form a concentration of beads in the droplet. The continued transport of the droplet away from the magnetic field causes the concentration of beads to break away from the droplet to yield a small, concentrated bead-containing droplet immobilized by the magnet.

公开(公告)号：US20160271623A1

公开(公告)日：2016-09-22

申请号：US15165883

申请日：2016-05-26

Applicant: ADVANCED LIQUID LOGIC, INC.

Inventor： Vamsee K. Pamula ,  Prasanna Thwar ,  Arjun Sudarsan ,  Ramakrishna Sista

IPC: B03C7/02 ,  B01L3/00

CPC classification number: B03C7/026 ,  B01L3/50273 ,  B01L3/502761 ,  B01L2200/0647 ,  B01L2300/0887 ,  B01L2400/0424 ,  B01L2400/0427 ,  B03C1/01 ,  B03C1/288 ,  B03C5/00 ,  B03C5/005 ,  B03C5/026 ,  B03C2201/26 ,  G01N33/54326

Abstract: The invention provides a method of redistributing magnetically responsive beads in a droplet. The method may include conducting on a droplet operations surface one or more droplet operations using the droplet without removing the magnetically responsive beads from the region of the magnetic field. The droplet operations may in some cases be electrode-mediated. The droplet operations may redistribute and/or circulate the magnetically responsive beads within the droplet. In some cases, the droplet may include a sample droplet may include a target analyte. The redistributing of the magnetically responsive beads may cause target analyte to bind to the magnetically responsive beads. In some cases, the droplet may include unbound substances in a wash buffer. The redistributing of the magnetically responsive beads causes unbound substances to be freed from interstices of an aggregated set or subset of the magnetically responsive beads.

Abstract translation: 本发明提供了一种在液滴中重新分布磁响应珠的方法。 该方法可以包括在液滴操作表面上使用液滴进行一个或多个液滴操作，而不从磁场的区域移除磁响应珠。 在某些情况下，液滴操作可能是电极介导的。 液滴操作可以在液滴内重新分布和/或循环磁响应珠。 在一些情况下，液滴可以包括样品液滴可以包括靶分析物。 磁响应珠的重新分布可能导致目标分析物结合磁响应珠。 在一些情况下，液滴可以包括洗涤缓冲液中的未结合物质。 磁响应珠子的重新分布导致未结合物质从磁性响应珠粒的聚集或子集的空隙中释放出来。

公开(公告)号：US20160109338A1

公开(公告)日：2016-04-21

申请号：US14978935

申请日：2015-12-22

Applicant: Advanced Liquid Logic, Inc.

Inventor： Ramakrishna Sista ,  Vamsee K. Pamula ,  Vijay Srinivasan ,  Michael G. Pollack ,  Allen Eckhardt

IPC: G01N1/38

CPC classification number: G01N33/54326 ,  B01F11/0071 ,  B01F13/0071 ,  B01F13/0076 ,  B01F13/0809 ,  B01L3/50273 ,  B01L3/502761 ,  B01L3/502792 ,  B01L7/52 ,  B01L7/525 ,  B01L2200/027 ,  B01L2200/0647 ,  B01L2200/0673 ,  B01L2300/06 ,  B01L2300/0654 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0864 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/0421 ,  B01L2400/0424 ,  B01L2400/0427 ,  B01L2400/043 ,  B01L2400/0436 ,  B01L2400/0442 ,  G01N1/38 ,  G01N2001/386 ,  G01N2035/1046 ,  Y10T436/11 ,  Y10T436/25 ,  Y10T436/25625 ,  Y10T436/2575

Abstract: The invention provides a method of circulating magnetically responsive beads within a droplet in a droplet actuator. The invention also provides methods for splitting droplets. The invention, in one embodiment, makes use of a droplet actuator with top and bottom substrates, a plurality of magnetic fields respectively present proximate the top and bottom substrates, wherein at least one of the magnet fields is selectively alterable, and a plurality of droplet operations electrodes positioned along at least one of the top and bottom surfaces. A droplet is positioned between the top and bottom surfaces and at least one of the magnetic fields is selectively altered.

公开(公告)号：US20150268235A1

公开(公告)日：2015-09-24

申请号：US14731740

申请日：2015-06-05

Applicant: Advanced Liquid Logic, Inc.

Inventor： Michael G. Pollack ,  Vamsee K. Pamula ,  Ramakrishna Sista ,  Arjun Sudarsan

IPC: G01N33/543

CPC classification number: G01N33/54333 ,  B01F11/0071 ,  B01F13/0071 ,  B01F13/0076 ,  B01L3/502715 ,  B01L3/502761 ,  B01L3/502784 ,  B01L3/502792 ,  B01L7/52 ,  B01L7/525 ,  B01L2200/027 ,  B01L2200/0647 ,  B01L2200/0668 ,  B01L2300/0654 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0864 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/0421 ,  B01L2400/0424 ,  B01L2400/0427 ,  B01L2400/043 ,  B01L2400/0436 ,  B01L2400/0442 ,  B03C1/02 ,  B03C1/288 ,  B03C1/30 ,  B03C5/005 ,  B03C2201/18 ,  B03C2201/26 ,  C12N15/1013 ,  G01N33/561 ,  G01N2035/1046 ,  Y10T436/11 ,  Y10T436/25 ,  Y10T436/25625 ,  Y10T436/2575

Abstract: The invention relates to bead incubating and washing on a droplet actuator. Methods for incubating magnetically responsive beads that are labeled with primary antibody, a sample (i.e., analyte), and secondary reporter antibodies on a magnet, on and off a magnet, and completely off a magnet are provided. Also provided are methods for washing magnetically responsive beads using shape-assisted merging of droplets. Also provided are methods for shape-mediated splitting, transporting, and dispensing of a sample droplet that contains magnetically responsive beads. The apparatuses and methods of the invention provide for rapid time to result and optimum detection of an analyte in an immunoassay.

Abstract translation: 本发明涉及在液滴致动器上的珠孵化和洗涤。 提供了用于将用一抗标记的磁响应珠，样品（即分析物）和二次报告基因抗体孵育在磁体上，磁铁上和从磁体上离开并完全离开磁体的方法。 还提供了使用形状辅助的液滴合并来洗涤磁响应珠的方法。 还提供了用于形状介导的分离，输送和分配含有磁响应珠的样品液滴的方法。 本发明的装置和方法提供了免疫测定中分析物的快速结果和最佳检测的时间。

公开(公告)号：US09086345B2

公开(公告)日：2015-07-21

申请号：US14308110

申请日：2014-06-18

Applicant: Advanced Liquid Logic, Inc.

Inventor： Ramakrishna Sista ,  Vamsee K. Pamula ,  Vijay Srinivasan ,  Michael G. Pollack ,  Allen Eckhardt

IPC: G01N15/06 ,  G01N33/00 ,  G01N33/48 ,  G01N1/38 ,  B01F11/00 ,  B01F13/00 ,  B01L3/00 ,  B01L7/00 ,  G01N35/10

CPC classification number: G01N33/54326 ,  B01F11/0071 ,  B01F13/0071 ,  B01F13/0076 ,  B01F13/0809 ,  B01L3/50273 ,  B01L3/502761 ,  B01L3/502792 ,  B01L7/52 ,  B01L7/525 ,  B01L2200/027 ,  B01L2200/0647 ,  B01L2200/0673 ,  B01L2300/06 ,  B01L2300/0654 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0864 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/0421 ,  B01L2400/0424 ,  B01L2400/0427 ,  B01L2400/043 ,  B01L2400/0436 ,  B01L2400/0442 ,  G01N1/38 ,  G01N2001/386 ,  G01N2035/1046 ,  Y10T436/11 ,  Y10T436/25 ,  Y10T436/25625 ,  Y10T436/2575

Abstract: The invention provides a method of dispersing or circulating magnetically responsive beads within a droplet in a droplet actuator. The invention, in one embodiment, makes use of a droplet actuator with a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at a portion of the plurality of droplet operations electrodes. A bead-containing droplet is provided on the droplet actuator in the presence of the uniform magnetic field. Beads are circulated in the droplet during incubation by conducting droplet operations on the droplet within a uniform region of the magnate field. Other embodiments are also provided.

Abstract translation: 本发明提供了一种在液滴致动器中的液滴内分散或循环磁响应珠的方法。 在一个实施例中，本发明利用具有配置成传送液滴的多个液滴操作电极的液滴致动器和存在于多个液滴操作电极的一部分处的磁场。 在均匀磁场存在的情况下，在液滴致动器上提供含珠的液滴。 在孵育期间，通过在大气场的均匀区域内的液滴上进行液滴操作，珠子在液滴中循环。 还提供了其他实施例。

公开(公告)号：US20140302580A1

公开(公告)日：2014-10-09

申请号：US14308110

申请日：2014-06-18

Applicant: Advanced Liquid Logic, Inc.

Inventor： Ramakrishna Sista ,  Vamsee K. Pamula ,  Vijay Srinivasan ,  Michael G. Pollack ,  Allen Eckhardt

IPC: G01N1/38

CPC classification number: G01N33/54326 ,  B01F11/0071 ,  B01F13/0071 ,  B01F13/0076 ,  B01F13/0809 ,  B01L3/50273 ,  B01L3/502761 ,  B01L3/502792 ,  B01L7/52 ,  B01L7/525 ,  B01L2200/027 ,  B01L2200/0647 ,  B01L2200/0673 ,  B01L2300/06 ,  B01L2300/0654 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0864 ,  B01L2300/0867 ,  B01L2300/089 ,  B01L2300/1827 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/0421 ,  B01L2400/0424 ,  B01L2400/0427 ,  B01L2400/043 ,  B01L2400/0436 ,  B01L2400/0442 ,  G01N1/38 ,  G01N2001/386 ,  G01N2035/1046 ,  Y10T436/11 ,  Y10T436/25 ,  Y10T436/25625 ,  Y10T436/2575

Abstract: The invention provides a method of dispersing or circulating magnetically responsive beads within a droplet in a droplet actuator. The invention, in one embodiment, makes use of a droplet actuator with a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at a portion of the plurality of droplet operations electrodes. A bead-containing droplet is provided on the droplet actuator in the presence of the uniform magnetic field. Beads are circulated in the droplet during incubation by conducting droplet operations on the droplet within a uniform region of the magnate field. Other embodiments are also provided.

Abstract translation: 本发明提供了一种在液滴致动器中的液滴内分散或循环磁响应珠的方法。 在一个实施例中，本发明利用具有配置成传送液滴的多个液滴操作电极的液滴致动器和存在于多个液滴操作电极的一部分处的磁场。 在均匀磁场存在的情况下，在液滴致动器上提供含珠的液滴。 在孵育期间，通过在大气场的均匀区域内的液滴上进行液滴操作，珠子在液滴中循环。 还提供了其他实施例。

公开(公告)号：US20140231257A1

公开(公告)日：2014-08-21

申请号：US14234855

申请日：2012-07-25

Applicant: ADVANCED LIQUID LOGIC, INC.

Inventor： William Craig Bauer ,  Ramakrishna Sista ,  Donovan E. Bort

IPC: C02F1/40 ,  B23P11/02 ,  G01N27/00

CPC classification number: B01L3/502715 ,  B01L3/502792 ,  B01L2200/025 ,  B01L2200/04 ,  B01L2300/0816 ,  B01L2300/089 ,  B01L2400/0427 ,  B01L2400/043 ,  B23P11/02 ,  Y10T29/49945

Abstract: Droplet actuator apparatus and system are provided. An apparatus comprises: a microfluidics system having an insertion slot for insertion of a droplet actuator; a bottom plate against which the droplet actuator would slide when inserting the droplet actuator into the insertion slot; and means for forcing a substrate in the droplet actuator parallel to the bottom plate, wherein warpage in the substrate is corrected.

Abstract translation: 提供液滴致动器装置和系统。 一种装置包括：具有用于插入液滴致动器的插入口的微流体系统; 当将液滴致动器插入插槽时液滴致动器将滑动的底板; 以及用于强制平行于底板的液滴致动器中的基板的装置，其中校正基板中的翘曲。