Related Experiment Video
Updated: Jan 27, 2026

Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
Published on: April 12, 2018
Feasibility Study of a Microfluidic Solenoid for Discrete Quantitation of Magnetized Cells
Abstract:
In this paper, a cell quantitation system is proposed based on a new microfluidic solenoid design. The design is simulated in COMSOL and a scaled version of the prototype is built and the induced voltage due to the passage of a magnetic material is measured using a low-noise amplifier and converted to a digital signal using a DSP chip. The simulation results show approximately 16-nV induced voltage across the solenoid and the measurement results for a scaled version of the solenoid outputs 125-mV peak voltage. A microfluidic fabrication process demonstrates a successful prototype of a microfluidic solenoid.
Related Concept Videos
Magnetic Field of a Solenoid
Consider a solenoid with 100 turns wrapped around a cylinder of...
Solenoids
Each turn in a solenoid can be approximated as a circular current carrying coil that generates a dipole moment. The...
Discrete Fourier Transform
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Discrete-time Fourier transform
One of the notable...
Basic Discrete Time Signals
The unit impulse or sample sequence is mathematically expressed as zero for all n values except at n=0, where it is one. The unit impulse sequence, denoted by δ(n), is the first difference of the unit step sequence, while the unit step sequence u(n) is the...

