Here are the highlights from Session 4 – Nano Materials from day two of the IEEE San Francisco Bay Area Nanotechnology Council 6th Annual Symposium“Nanotechnology: State of the Art & Applications”
Presentation archive for talks not linked below. Updated as the council receives the presentations.
Eric Granstrom, General Manager and V.P. of R&D, Cima NanoTech – “Self Aligning Nano Technology for Electronics.”
- First product Self Aligning Nano Technology for Transparent Electronics (SANTE) is transparent conductive film produced by self aligning silver nanoparticles.
- For the same transparency, it has 1/10 the resistance of Indium Tin Oxide (ITO). Also doesn’t yellow shift the color.
- Based upon current consumption, it is projected that there is only a 7 year supply of ITO. China controls 80% of this supply.
- Largest initial market is displays which have one or more (LCDs have two) conductive films.
- Solar is another application since it would:
- Reduce the area of the solar cell blocked by the conductors. Up to 10% improvement may be possible.
- Enable thinner Si wafers since it takes less pressure to attach than the current silkscreen.
- Process “tons” of silver nanoparticles per year. Films are produced by the kilometer roll.
Dr. Wenbing Yun, CTO, Xradia, “Nondestructive 3D Visualization of Nanoworld.”
- X-ray computed tomography (CT) based upon technology initially developed at Lawrence Berkeley National Lab.
- Can image down to 25 nm resolution. Only player in “Nano CT” space with systems that have resolution below 1 um.
- CT avoids issues of artifacts from sample preparation (as seen with SEMs)
- Excellent looking high aspect ratio structures for the Zone Plate lens (450 nm high by 50 nm wide features) & calibration standards (650 nm high by 50 nm line/space).
- Many surprising uses of the technology – including measuring paper coatings and oil porosity.
Dr. Walter Trybula, IEEE Distinguished Lecturer and Director Nanomaterials Application Center – Texas State University, “Safely Handling NanoMaterials.”
- Need systematic approach to nano safety since not all the answers are known and often there are not even clear definitions. Current knowledge provides directions but not absolutes.
- A big challenge is that the behavior – including toxicity – of nanomaterials change with size. So hard to generally classify.
- Issue with definition – 26 different government agencies involved, each with different rules.
- Proactive work is required, especially in educational institutes
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