Research Projects
I was lucky to be part with some exciting research projects involving force-matter interactions. Particularly, both electric & magnetic fields hold huge potentials as external energy sources to guide matter. Where an electric field can tune di-electric constant, an identifying characteristic parameter of any subject, the magnetic field, on other hand, can strongly control direction of interactions. Consequently, recent years are witnessing significant exploration taking advantage of technological paradigm shift. I can't help sharing some of my work domains & interesting observations.
Stripes
Braids
01
Reconfigurable Colloidal Micro-structures
Butterfly
Pyramids
Description is reserved for now for data not being published yet. Would be updated soon!!
Skills learnt/applied: Electro-mechanical hardware & Signal modulation, Optical microscopes, Script writing for Digital Image Processing, Advanced Electro-chemistry, Data presentation & publish
02
Micro-propulsion of linear
objects
Description is reserved for now for data not being published yet. Would be updated soon!!
Skills learnt/applied: Wet lab knowledge & instruments, Chemical sample handling, Polymer synthesis, Slow motion captures, COMSOL Multiphysics with user inputs, Physics Based Modeling,, Data presentation & publish
a
03
EHD Pump by Ion Harvesting
Corona discharge is a good art of ionization which have a heavy historical background in gas pump technology until recently where the attention has shifted towards liquids.
In this study, an EHD pump is built. The liquids investigated are high viscous silicone 50 cst, silicone 150 cst, castor 3000 cst, which were found to even climb tilted wall.
Furthermore, the EHD pump with arrays of electrode could create controlled agitation on viscous liquids, by controlling the sequence of ON-OFF modes.
Agitation by electro-convective motion can increase heat transfer. Besides, non-contact agitation can be extremely useful to uniformly disperse insoluble suspensions.
b
Skills learnt/applied: Flow characterization, High-speed camera , Data presentation & publish
04
Electric levitation and Motion of droplets Under High Voltage Ion Energy
Objects can achieve motion under non-uniform electric field through Di-electrophoresis (DEP). A common practice to create DEP is placing asymmetric sets of electrode, which can be overwhelming at small scale.
These experiments proposed a contactless DEP actuation via ion injection. It is devoid of burden of electrode specifications. The liquid layer, inside which objects/particles resides in, can act as pseudo-electrode. Avoiding metal electrodes & forcing the objects to touch liquid electrode can help maintain droplet stability by reducing amount of charge transfer.
The technique can be extended to array of electrodes that can maintain leaping motion in 3-D.
a
b
Skills learnt/applied: Emulsion rheology and characterization, High-speed camera , High voltage discharge, Experiment design, Data presentation & publish