Substrate

Building materials (46)
Material science (1)
Substrate (23)
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Superconducting (5)

Synopsis: 8. materials: Substrate:

As soon as you introduce plastic substrates you have all kinds of issues with sensitivity to the environment

or even pieces of dust appeared on the substrate. The material is difficult to nucleate unlike hbn

We started learning that we could control that nucleation by adding artificial edges to the substrate

which single layers of graphene are grown on copper substrates in a high-temperature furnace. One of the first applications of graphene may be as a conducting layer in flexible displays.

In studying the processing techniques used to create their samples for testing they found that the chemical most commonly used to remove the copper substrate also causes damage to the graphene severely degrading its strength.

For instance we can easily remove this material from the growth substrate and transfer it on to any arbitrary surface

and substrate heterogeneity says Liphardt an expert in PALM technology. This enables us to quantify how

The new PALM-based technique should allow enzyme cock tails to be matched optimally to the structural organizations of particular biomass substrates such as grass

Georgia Institute of technology and Purdue University researchers have developed efficient solar cells using natural substrates derived from plants such as trees.

Just as importantly by fabricating them on cellulose nanocrystal (CNC) substrates the solar cells can be recycled quickly in water at the end of their lifecycle.

The researchers report that the organic solar cells reach a power conversion efficiency of 2. 7 percent an unprecedented figure for cells on substrates derived from renewable raw materials.

The CNC substrates on which the solar cells are fabricated are optically transparent enabling light to pass through them before being absorbed by a very thin layer of an organic semiconductor.

Within only minutes the CNC substrate dissolves and the solar cell can be separated easily into its major components.

The development and performance of organic substrates in solar technology continues to improve providing engineers with a good indication of future applications said Kippelen who is also the director of Georgia Tech's Center for Organic Photonics and Electronics (COPE.

and petroleum-based substrates are not very eco-friendly. For instance if cells fabricated on glass were to break during manufacturing

Paper substrates are better for the environment but have shown limited performance because of high surface roughness or porosity.

The substrates have a low surface roughness of only about two nanometers. Our next steps will be to work toward improving the power conversion efficiency over 10 percent levels similar to solar cells fabricated on glass

or petroleum-based substrates said Kippelen. The group plans to achieve this by optimizing the optical properties of the solar cell's electrode.

Funding for CNC substrate processing was provided by USDA-Forest Service (Grant No. 11-JV-11111129-118)( R. J. M. J. P. Y. J. L

The researchers used it as a substrate for graphene. Hitting the combined material with femtosecond pulses from a near-infrared laser prompted the indium phosphide to emit terahertz back through the graphene.

and transferring it to an indium phosphide substrate. Laser pulses generated coherent bursts of terahertz radiation through a built-in surface electric field of the indium phosphide substrate that changed due to charge transfer between the graphene and the contaminating molecules.

The terahertz wave when visualized reflected the change. The experimental results are a warning for electronics manufacturers.

The Rice and Osaka labs are continuing to collaborate on a project to measure the terahertz conductivity of graphene on various substrates he said.

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