Artificial limbs have experience tremendous evolution in their long history. Throughout history, we’ve gone from the peg leg of the Dark Ages to technologically advanced modern day prosthesis that mimic the function of a natural limb. However, most prosthesis still lack a sense of touch.

Zhenan Bao, past ECS member and chemical engineer at Stanford University, is at the forefront of the research looking to change that.

(MORE: Read Bao’s past meeting abstracts in the ECS Digital Library for free.)

Recently on NPR’s All Things Considered, Bao described her work in developing a plastic artificial skin that can essentially do all the things organic skin can do, including sensing and self-healing.

The self-healing plastic Bao uses mimics the electrical properties of silicon and contains a nano-scale pressure sensor. The sensor is then connected to electrical circuits that connect to the brain, transmitting the pressure to the brain to analyze as feeling.

Additionally, the skin is set to be powered by polymers that can turn light into electricity.

While there is still much work to be done, Bao and her colleagues believe that this product could help people who have lost their limbs regain their sense of touch.

The new polymer is able to store energy at higher temperatures.
Image: Qi Li/Nature

Polymer dielectric materials have many beneficial properties when it comes to energy storage for advanced electronics and power systems. While the materials are highly flexible and have good chemical stability, their main drawback is their limitation of functionality in primarily low working temperatures. In turn, this limits the wider use of polymer dielectric materials for applications such as electric vehicles and underground oil exploration.

However, researchers from Pennsylvania State University have developed a flexible, high-temperature dielectric material from polymer nanocomposites that looks promising for the application of high-temperature electronics.

The researchers, including current ECS member Lei Chen, were able to stabilize dielectric properties by crosslinking polymer nanocomposites that contain boron nitride nanosheets. In testing, the energy density was increased by 400 percent while remaining stable at temperatures as high as 300° C.

With the nanocomposites having huge energy storage capabilities at high temperatures, a much broader application of organic materials in high temperatures electronics and energy storage can be explored.

PS: Interested in polymer research? Make sure to attend the 228th ECS Meeting and get the latest polymer science at our polymers symposia.

The new arrangement of photovoltaic materials includes bundles of polymer donors (green rods) and neatly organized fullerene acceptors (purple, tan).
Image: UCLA

A team of UCLA scientists are delivering good news on the solar energy front with the development of their new energy storage technology that could change the way scientists think about solar cell design.

Taking a little inspiration from the naturally occurring process of photosynthesis, the researchers devised a new arrangement of solar cell ingredients to make a more efficient cell.

“In photosynthesis, plants that are exposed to sunlight use carefully organized nanoscale structures within their cells to rapidly separate charges — pulling electrons away from the positively charged molecule that is left behind, and keeping positive and negative charges separated. That separation is the key to making the process so efficient,” said Sarah Tolbert, senior author of this research and published ECS author.

PS: Check out Tolbert’s recently published open access paper in the Journal of The Electrochemical Society entitled, “The Development of Pseudocapacitive Properties in Nanosized-MoO₂.”

The currently dilemma in solar cell design revolves around developing a product that is both efficient and affordable. While conventional silicon works rather well, it is too expensive to be practical on a large scale. More engineers and researchers have been moving to replace silicon with plastic, but that leads to efficiency levels taking a hit.

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Blood clots treated with PolySTAT (second from right) had denser fibrin networks, which helps reinforce and strengthen the clots.
Image: University of Washington

University of Washington researchers have developed a new injectable polymer that could keep soldiers and trauma patients from bleeding to death, called the PolySTAT.

The new polymer works to strengthen blood clots once administered into the patient’s bloodstream in a simple shot. The polymer then finds unseen internal injuries and starts working to stop the bleeding.

Researchers believe this could become the first line of defense for anything from battlefield injuries to car accidents. With testing already underway, the polymer has the potential to reach humans in as few as five years.

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A bowl of “anelloni,” consisting of ring-shaped pasta made from linguine.
Credit: David Michieletto

If the complexities of polymer physics elude you, the scientists from the University of Warwick may have a way to more clearly explain this premise.

Davide Michieletto and Matthew S. Turner have taken to the kitchen in an effort to more clearly explain polymer complexities. In order to do this, the two physicists have created a new type of pasta called the “anelloni.”

The “annoloni” – which is the Italian word for “ring” – works as a sort of analogy to explain the complicated shapes that ring-shaped polymers can adopt.

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A new chemical sponge out of the University of Nottingham has the potential to lessen the carbon footprint of the oil industry.

Professor Martin Schröder and Dr. Sihai Yang of the University of Nottingham led a multi-disciplinary team from various institutions, which resulted in the discovery of this novel chemical sponge that separates a number of important gases from mixtures generated during crude oil refinement.

Crude oil has many uses – from fueling cars and heating homes to creating polymers and other useful materials. However, the existing process for producing this fuel has not been as efficient as it could possibly be.

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