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Organic Semiconductor Nanotubes Used To Create High-Performance Electrochemical Actuator

Depiction of the application of organic semiconductor nanotubes in artificial muscles. Credit: Artwork Provided by: Mohammad Reza Abidian

Actuator discovery is better than existing technology

Researchers at the University of Houston have reported breakthroughs in the fields of materials science and engineering with the development of electrochemical actuators that use specialized organic semiconductor nanotubes (OSNTs).

Today, in the early stages of development, actuators will be an important part of research that will contribute to the future of robots, bioelectronics, and biomedicine.

“Electrochemical devices that convert electrical energy into mechanical energy have the potential to be used in many applications, from soft robotics and micropumps to autofocus microlenses and bioelectronics,” said an associate professor of biomedical engineering. Mohammad Reza Abidian says. you know Karen Institute of Technology. He is the corresponding author of the journal article “Organic Semiconductor Nanotubes for Electrochemical Devices”. Advanced functional materials, Discovery details.

Mohammad Reza Avidian

Mohammad Reza Abidian, an associate professor of biomedical engineering at the University of Houston, Karen Institute of Technology, announced a breakthrough in the development of electrochemical actuators.Credit: University of Houston

Important movements (defined by scientists as actuation and measured as deformation strain) and fast response times were elusive goals, especially for electrochemical actuator devices that operate in liquids. This is because the drag of the liquid limits the movement of the actuator, limiting the transport and accumulation of ions in the electrode material and structure. In Avidian’s lab, he and his team have improved how to avoid these two stumbling blocks.

“Our organic semiconductor nanotube electrochemical device exhibits high operating performance with fast ion transport and storage in liquid and gel polymer electrolytes, and adjustable dynamics. This device has low power consumption / strain and high operating performance. It offers excellent performance, including deformation, fast response, and excellent operational stability, “says Avidian.

He explained that this outstanding performance derives from the huge effective surface area of ​​the nanotube structure. The larger area promotes the transport and accumulation of ions, resulting in high electrical activity and durability.

“The low power / strain values ​​of this OSNT actuator are significantly improved over the previously reported liquid and air-operated electrochemical actuators, even when operating with liquid electrolytes,” Abidian said. increase. “We evaluated long-term stability. This organic semiconductor nanotube actuator showed superior long-term stability compared to previously reported conjugate polymer-based actuators operating in liquid electrolytes.”

Mohammadjavad Eslamian, Fereshtehsadat Mirab, Vijay Krishna Raghunathan and Sheereen Majd all joined Abidian on this project. you know Karen Institute of Technology.

The organic semiconductors used are called conductive polymers, and three scientists, Alan J. Heager and Alan Mc, who won the Nobel Prize in 2000 for the discovery and development of conductive polymers in the 1970s. Discovered by Diamid, Hideki Shirakawa.

In order for new types of actuators to surpass the status quo, it must be proven that the final product is not only very effective (in this case, with both liquid and gel polymer electrolytes), but also lasts longer.

“To demonstrate potential applications, we designed and developed a micron-scale mobile nerve probe based on OSNT microactuators. This microprobe can be implanted in the brain and is due to displacement of damaged tissue or neurons. The recording of adversely affected neural signals can be enhanced by adjusting the position of the movable microcantilever, “said Abidian.

The next step is animal testing.This will soon Columbia University.. Early results are expected by the end of 2021 and long-term testing will continue.

“Given our work to date, we expect these new OSNT-based electrochemical devices to help advance the next generation of soft robotics, artificial muscles, bioelectronics, and biomedical devices,” Abidian said. Says.

See also: “Organic Semiconductor Nanotubes for Electrochemical Devices”, Mohammadjavad Eslamian, Fereshtehsadat Mirab, Vijay Krishna Raghunathan, Sheereen Majd, Mohammad Reza Abidian, July 30, 2021 Advanced functional materials..
DOI: 10.1002 / adfm.202105358



Organic Semiconductor Nanotubes Used To Create High-Performance Electrochemical Actuator Source link Organic Semiconductor Nanotubes Used To Create High-Performance Electrochemical Actuator

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