Jul 10
15
blue jeans invention
The interesting point it brings up is “What would a world be like where everyone says exactly the truth, where there is no such thing as embellishment, or fabrication, or imagination?” Everything that is said in the movie is the absolute, sometimes brutal, truth. Until, of course, he discovers lying. But I shan’t be a spoiler on this one.
“We had to develop a completely new way of making the materials in general,” Dichtel said. The strategy uses a simple acid catalyst and relatively stable molecules called protected catechols to assemble key organic molecules into a neatly ordered two-dimensional sheet. These sheets stack on top of one another to form a lattice that provides pathways for charge to move through the material.
The reaction is also reversible, allowing for errors in the process to be undone and corrected.
“The whole system is constantly forming wrong structures alongside the correct one,” Dichtel said, “but the correct structure is the most stable, so eventually, the more perfect structures end up dominating.” The result is a structure with high surface area that maintains its precise and predictable molecular ordering over large areas.
The material’s internal structure has been confirmed by using X-ray diffraction. The molecules at the core of this framework are called phtalocyanines (the dyes mentioned earlier). They have a structure similar to chlorophyll, the substance that gives plants their green color and that has the role of photosynthesis, the process that feeds the plants with solar energy.
By combining organic materials with electronics, the Cornell researchers hope to get some design that allows the hybridization to work with solar cells more efficiently or at least as efficient as silicon. The framework can be combined with other organic materials to form more efficient Graetzel cells, for example.
“This is the very beginning of our work,” says Dichtel, outlining that their discovery is not a complete solar cell, but merely a scientific tool on which solar cells can be built. That could take longer, though, but what’s most important is that this is a new discovery in the field and the base has been set for future experimentation.
