Thermal sensing in fluid at the micro-nano-scales

Aberrant mechanical microenvironment in lung cancer probed at the micro- and nano-scales

The lung is a moderately soft organ with unique mechanical properties that are necessary for breathing. However, the appearance of a desmoplastic stroma rich in activated fibroblasts/myofibroblasts and pro-fibrotic extracellular matrix (ECM) components in lung tumors strongly suggests that the cellular microenvironment becomes abnormally stiff in lung cancer. To test this hypothesis, we have an...

The nature of the frictional force at the macro-, micro-, and nano-scales

Nowadays it is accepted that the friction force is a combined effect arising from various phenomena: adhesive forces, capillary forces, contact elasticity, topography, surface chemistry, and generation of a third body, etc. Any of them can dominate depending on the experimental force and length scales of the study. Typical forces in macro-tribology are in the Newtons, while are reduced to milli...

Report: a Model for Flows in Channels, Pipes, and Ducts at Micro and Nano Scales

Rarefied gas flows in channels, pipes, and ducts with smooth surfaces are studied in a wide ( ) ( ) range of Knudsen number Kn at low Mach number M with the objectiv e of dev eloping simple, physics-based models. Such flows are encountered in microelectromechanical systems ( ) MEMS , in nanotechnology applications , and in low-pressure env ironments. A new general boundary condition that accoun...

Controlling flow at the micro- and nano-scale in zebra-patterned micro- and nano-fluidic devices

When ions are driven by an external electrostatic field, their net motion will generate a net flow in the surrounding fluid called electro-osmotic flux. In microfluidic devices, the onset of such a flux ultimately depends on the effective interaction between the fluid and the inner walls of the channel. In particular novel scenarios can occur when the channel properties are not homogeneous, as ...

Flow boundary conditions from nano- to micro-scales