Sourabh Saha
Georgia Institute of Technology, GA·Engineering·Early-career
Building complex 3D objects with features smaller than a micrometer is hard. Chip-style microfabrication mostly makes flat patterns, and typical 3D printers cannot reach nanoscale precision.
- Fields
Engineering
Materials Science
- Topics
two-photon lithography
additive manufacturing
3D printing
- Grants
- 1 known grant, through May 2027
What they work on
- Develop physics-based relationships that predict printability and final print geometry in projection two-photon lithography, validated against experimental measurements.
- Identify the theoretical and practical limits on printing rate by studying light-matter interactions at high intensity and polymerization on millisecond and submicron scales.
- Develop error-compensation techniques using in-situ process monitoring and control to minimize defects when printing large structures with nanoscale precision.
More about the research
Two-photon lithography fills this gap by using a focused laser to harden a light-sensitive liquid polymer only at tiny points, printing 3D nanostructures directly. It is slow, however, and finding the right settings for a desired shape relies on trial and error, limiting use in quantum devices, electric transportation and biomedicine.
Why it matters
Faster, predictable nanoscale 3D printing could make two-photon lithography practical for industrial manufacturing of nano-enabled devices used in quantum information processing, electric transportation and biomedicine. Predictive models could replace slow trial-and-error, saving time and resources for manufacturers.
Known grants
From NIH and NSF research grants. Labs often have other funding we can't see.
Closest labs
Jun Li
Embry-Riddle Aeronautical University-Daytona Beach, FL·Engineering
Develop direct mesoscale simulations of 3D printing that couple heat, mechanical forces, chemistry and fluid-structure interactions, to show how temperature gradients and melting between filaments and reinforcing fibers lead to micro-cracks.
Arunkumar Subramanian
University of Illinois Chicago, IL·Engineering
Test whether nanoscale nozzles with on-chip electrodes enable sub-continuum nano-dripping, ejecting droplets smaller than 20 nanometers under very low electric stress, using the silicon-based SNAP-Chip printer.
Yanfei Gao
University of Tennessee-Knoxville, TN·Materials Science
Examine how materials and manufacturing processes affect the mechanical, functional and environmental performance of welded or 3D-printed metal parts, to improve reliability and extend the service life of critical infrastructure.
The school
Georgia Institute of Technology: 50 labs on PI Pages, $1.5B a year on research, 572 research doctorates a year.
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