Photia Inc.

 

INDUSTRIAL-SCALE MANUFACTURING OF NANOCOMPOSITES
 


team:

Joseph Geddes, Ph.D.

Joseph Geddes, Ph.D.

Joseph Geddes has extensive practical experience developing scalable 2D and 3D nanolithography methods, both in industry and academia. He founded Photia Incorporated to commercialize advances in holographic lithography and materials engineering  for energy applications. As a postdoc, he worked with Paul Braun's group at the University of Illinois at Urbana-Champaign on several research projects involving holographic lithography to make photonic crystals. As an engineer at Rolith, he made key experimental and theoretical contributions to the development of rolling mask lithography (RML), a method for making two-dimensional nanostructured coatings. He earned his doctorate in Engineering Science and Mechanics from the Pennsylvania State University, where his work focused on the propagation of ultrashort optical pulses through nanostructured materials. 


technology:

Critical need: Materials having nanometer scale three dimensional structures could lead to dramatic improvements in solid state lighting, radiative cooling, photovoltaics, batteries, lightweighting, and membranes. However, no existing manufacturing process is capable of building these 3d nanostructures quickly, continuously, and at industrial scale.

Technology vision: Photia Incorporated is developing technology for high-throughput manufacturing of 3d nanostructured materials for energy applications.

Current state-of-the-art: Top-down methods like projection lithography and nanoimprint lithography can build precise nanostructures in 2d. However, they are too expensive and slow to manufacture 3d nanostructures at industrial scale. Bottom-up methods like self-assembly can be cheap and quick, but have high defect rates and are limited in the types of structures that can be produced.

Key innovation: Photia has pioneered advances in holographic lithography to enable high-speed, continuous nanomanufacturing of 3d nanostructured materials. This technique uses four or more lasers to etch 3d patterns into light sensitive materials. The etched material can be used as a part or can serve as a templates to build nanostructured materials using high-volume industrial techniques like electroplating or chemical vapor deposition. 

 
Process flow for holographic lithography. Four optical beams interfere to expose a photoresist, creating a latent image and 3D structure on development. (Graphics adapted from [Chen, Geddes, et al., APL 91, 241103 (2007).]).

Process flow for holographic lithography. Four optical beams interfere to expose a photoresist, creating a latent image and 3D structure on development. (Graphics adapted from [Chen, Geddes, et al., APL 91, 241103 (2007).]).

Scanning electron micrographs of material made by holographic lithography in (a) oblique view and (b, c) cross sections. (Adapted from [Chen, Geddes, et al., APL 91, 241103 (2007).].)

Scanning electron micrographs of material made by holographic lithography in (a) oblique view and (b, c) cross sections. (Adapted from [Chen, Geddes, et al., APL 91, 241103 (2007).].)

 

Competing technology: In addition to conventional 2d lithography, engineers sometimes use materials that are partially and randomly nanostructured. For example, metal matrix or carbon fiber composites are used for mechanical applications. Despite their adequacy for some applications, these methods would be greatly improved using engineered materials with specific morphology.

First market hypothesis: Performance optical coatings, filters, and lens arrays.

Potential for impact: Photia's technology could ultimately lead to the production of new materials for applications in solid state lighting, radiative cooling, photovoltaics, batteries, lightweight high-strength composites, and other energy systems. Each of these applications represents multiple quads of energy production or consumption.

We're looking for: 

  • Technical collaborators
  • Funders
  • Joint development partners
  • Technoeconomic analysis
  • Team members - scientist, engineers
  • Team members - business

Links:

Contact: Joe Geddes (jbg3 [at] photiatech [dot] com


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