Researchers made an egg-roll-shaped capillary tube with inclined microplates. Liquids move directionally based on contact angles, opening new ways to control fluids in microchannels.

🔗 https://pubs.aip.org/aip/pof/article/38/3/032004/3381856/A-curled-open-capillary-tube-for-selective

#Microfluidics #Capillarity #LiquidTransport #SurfaceScience #PhysicsOfFluids

Ilir Aliu (@IlirAliu_)

실시간으로 매우 안정적인 모션으로 96웰 플레이트 내에 1 나노리터에서 1 마이크로리터 사이의 액적을 거의 완벽한 반복성으로 배치하는 로봇 시연. 흔들림·드리프트·오버슈트가 없고 팁을 스케일 수준에서 정확히 추적해 정밀한 액체 취급을 보여준다는 설명.

https://x.com/IlirAliu_/status/2028031539846553891

#labautomation #robotics #liquidhandling #microfluidics

Microfluidic Chip Enables Direct Pollutant Detection Without Sample Cleaning

https://newsletter.tf/microfluidic-chip-pollutant-detection-korea/

A new microfluidic chip can detect pollutants directly from samples with dirt or sand, speeding up the testing process.

#PollutionDetection, #Microfluidics, #PFAS, #EnvironmentalTesting, #Korea

New Chip Finds Pollution Fast Without Cleaning Samples

Scientists have created a new small chip that can find harmful pollution in water or soil very fast. It does not need to clean the sample first, which makes testing quicker and easier.

https://newsletter.tf/microfluidic-chip-pollutant-detection-korea/

#PollutionDetection, #Microfluidics, #PFAS, #EnvironmentalTesting, #Korea

Watching Waves on the Nanoscale

It’s tough to simulate nonlinear wave dynamics, so scientists often test theories in wave flumes, where they can create more controlled waves than what we see in the wild. But conventional wave flumes are big–meters-long, complicated equipment–and can only test a small range of conditions. To reach more extreme nonlinear dynamics, researchers have turned to a chip-based approach. These 100-micron-long wave flumes carry a film of superfluid helium less than 7 nanometers thick. But despite that tiny size, the system can reach levels of nonlinearity five orders of magnitude greater than their full-sized counterparts. (Image and research credit: M. Reeves et al.; via Physics Today)

Necroprinting By Mosquito

Engineers have been adapting biological materials into robotics in recent years. One of the latest versions of this trend is “necroprinting,” in which researchers built a microscale 3D printer around a mosquito’s proboscis. Made to pierce thick skin to reach blood, the mosquito proboscis offered the kind of size, geometry, and stiffness needed for small-scale printing. The team found that their necroprinter performed well at the ~20 micron scale, with the mosquito-based nozzle costing only a fraction of what a conventional human-made nozzle would. (Image credit: NIAID; research credit: J. Puma et al.; via Ars Technica)

Acoustically Trapping Nanoparticles

Micrometer-sized particles can be trapped in place against a flow using acoustic waves. But smaller nano-sized particles feel less radiation pressure from acoustic waves, and so keep moving in the flow. But new work shows that it is possible to trap those nanoparticles with some additional help.

In this case, researchers seeded their flow with microparticles that were held in place by acoustic waves against the background flow. When nanoparticles were added to the mix, they remained trapped in the wells between microparticles due to a combination of acoustic forcing and the hydrodynamic shielding of the nearby large particles. (Image credit: P. Czerwinski; research credit: A. Pavlič and T. Baasch; via APS)

#acousticTrapping #acoustics #fluidDynamics #microfluidics #particleSuspension #physics #science