Abstract: The present invention generally relates to systems and techniques for manipulating fluids and/or making droplets. In certain aspects, the present invention generally relates to droplet production. The droplets may be formed from fluids from different sources. In one set of embodiments, the present invention is directed to a microfluidic device comprising a plurality of droplet-making units, and/or other fluidic units, which may be substantially identical in some cases. Substantially each of the fluidic units may be in fluidic communication with a different source of a first fluid and a common source of a second fluid, in certain embodiments. In one aspect, substantially the same pressure may be applied to substantially all of the different sources of fluid, which may be used to cause fluid to move from the different sources into the microfluidic device. In some cases, the fluids may interact within the fluidic units, e.g., by reacting, or for the production of droplets within the microfluidic device.

Abstract: The present invention generally relates to systems and techniques for manipulating fluids and/or making droplets. In certain aspects, the present invention generally relates to droplet production. The droplets may be formed from fluids from different sources. In one set of embodiments, the present invention is directed to a microfluidic device comprising a plurality of droplet-making units, and/or other fluidic units, which may be substantially identical in some cases. Substantially each of the fluidic units may be in fluidic communication with a different source of a first fluid and a common source of a second fluid, in certain embodiments. In one aspect, substantially the same pressure may be applied to substantially all of the different sources of fluid, which may be used to cause fluid to move from the different sources into the microfluidic device. In some cases, the fluids may interact within the fluidic units, e.g., by reacting, or for the production of droplets within the microfluidic device.

Abstract: The present invention discloses a method for separating nanoparticles with a controlled number of active groups is disclosed. First, a plurality of nanoparticles are provided, wherein the surface of the nanoparticle comprises a plurality of first active groups. Next, a plurality of functional ligands are provided, wherein the functional ligand comprises at least one second active group and at least one third active group. Then, a binding process is performed to bind the nanoparticle with the functional ligand, wherein the first active group connects with the second active group. After the binding process, a converting process and a separation process are performed to isolate a plurality of nanoparticles with a controlled number of the fifth active groups. The controlled number is integers from 0 to 10.

Abstract: The present invention discloses a method for separating nanoparticles with a controlled number of active groups is disclosed. First, a plurality of nanoparticles are provided, wherein the surface of the nanoparticle comprises a plurality of first active groups. Next, a plurality of functional ligands are provided, wherein the functional ligand comprises at least one second active group and at least one third active group. Then, a binding process is performed to bind the nanoparticle with the functional ligand, wherein the first active group connects with the second active group. After the binding process, a separation process is performed to isolate a plurality of nanoparticles with a controlled number of the third active groups. The controlled number is integers from 0 to 10.

Abstract: Devices and methods for dividing droplets are generally described. In some embodiments, an article may comprise a fluidic channel comprising an array of obstructions. In certain embodiments, the arrangement of obstructions in the array may affect the flow path of fluid in the channel. For example, the array of obstructions may be used to convert a polydisperse population of droplets into a relatively monodisperse population of droplets. Passing a polydisperse population of droplets through the array may result in the division of droplets such that the population of droplets exiting the array has a narrower distribution in the characteristic dimensions of the droplets. The arrangement of obstructions in the array may allow for high-throughput production of a substantially monodisperse population of droplets in some cases. In some embodiments, the population of droplets exiting the array may be converted into particles.

Abstract: The present invention generally relates to systems and techniques for manipulating fluids and/or making droplets. In certain aspects, the present invention generally relates to droplet production. The droplets may be formed from fluids from different sources. In one set of embodiments, the present invention is directed to a microfluidic device comprising a plurality of droplet-making units, and/or other fluidic units, which may be substantially identical in some cases. Substantially each of the fluidic units may be in fluidic communication with a different source of a first fluid and a common source of a second fluid, in certain embodiments. In one aspect, substantially the same pressure may be applied to substantially all of the different sources of fluid, which may be used to cause fluid to move from the different sources into the microfluidic device. In some cases, the fluids may interact within the fluidic units, e.g., by reacting, or for the production of droplets within the microfluidic device.