New method can deposit nanomaterials onto flexible surfaces and 3-D objects
Printing has come a long way since the days of Johannes Gutenberg. Now, researchers have developed a new method that uses plasma to print nanomaterials onto a 3-D object or flexible surface, such as paper or cloth. The technique could make it easier and cheaper to build devices like wearable chemical and biological sensors, flexible memory devices and batteries, and integrated circuits.
One of the most common methods to deposit nanomaterials–such as a layer of nanoparticles or nanotubes–onto a surface is with an inkjet printer similar to an ordinary printer found in an office. Although they use well-established technology and are relatively cheap, inkjet printers have limitations. They can’t print on textiles or other flexible materials, let alone 3-D objects. They also must print liquid ink, and not all materials are easily made into a liquid.
Some nanomaterials can be printed using aerosol printing techniques. But the material must be heated several hundreds of degrees to consolidate into a thin and smooth film. The extra step is impossible for printing on cloth or other materials that can burn, and means higher cost for the materials that can take the heat.
The plasma method skips this heating step and works at temperatures not much warmer than 40 degrees Celsius. “You can use it to deposit things on paper, plastic, cotton, or any kind of textile,” said Meyya Meyyappan of NASA Ames Research Center. “It’s ideal for soft substrates.” It also doesn’t require the printing material to be liquid.
The researchers, from NASA Ames and SLAC National Accelerator Laboratory, describe their work in Applied Physics Letters, from AIP Publishing>.
They demonstrated their technique by printing a layer of carbon nanotubes on paper. They mixed the nanotubes into a plasma of helium ions, which they then blasted through a nozzle and onto paper. The plasma focuses the nanoparticles onto the paper surface, forming a consolidated layer without any need for additional heating.
The team printed two simple chemical and biological sensors. The presence of certain molecules can change the electrical resistance of the carbon nanotubes. By measuring this change, the device can identify and determine the concentration of the molecule. The researchers made a chemical sensor that detects ammonia gas and a biological sensor that detects dopamine, a molecule linked to disorders like Parkinson’s disease and epilepsy.
But these were just simple proofs-of-principle, Meyyappan said. “There’s a wide range of biosensing applications.” For example, you can make sensors that monitor health biomarkers like cholesterol, or food-borne pathogens like E. coli and Salmonella.
Because the method uses a simple nozzle, it’s versatile and can be easily scaled up. For example, a system could have many nozzles like a showerhead, allowing it to print on large areas. Or, the nozzle could act like a hose, free to spray nanomaterials on the surfaces of 3-D objects.
“It can do things inkjet printing cannot do,” Meyyappan said. “But anything inkjet printing can do, it can be pretty competitive.”
The method is ready for commercialization, Meyyappan said, and should be relatively inexpensive and straightforward to develop. Right now, the researchers are designing the technique to print other kinds of materials such as copper. They can then print materials used for batteries onto thin sheets of metal such as aluminum. The sheet can then be rolled into tiny batteries for cellphones or other devices.
Learn more: Printing nanomaterials with plasma
The Latest on: Printing nanomaterials
via Google News
The Latest on: Printing nanomaterials
- Nanofabrication platform developed for directing components into 3D arrayson January 19, 2020 at 9:13 pm
Though self-assembly (SA) has successfully been used to organize nanomaterials of several kinds ... Potentially, our platform could be an enabling technology ‘beyond 3D printing manufacturing’ to ...
- New wearable gas sensor may soon be available for environmental and health monitoringon January 16, 2020 at 10:04 am
The nanomaterials used in this work are reduced graphene oxide and molybdenum disulfide ... This may involve using machine learning to identify the distinct signals of individual molecules on the ...
- 3D Printing Of Body Parts Is Coming, Regulations Need to Keep Upon January 15, 2020 at 11:50 am
But 3D printing has only just begun to transform ... such as gels and certain nanomaterials. A number of promising animal studies, some involving cardiac tissue, blood vessels and skin ...
- 3D Printed Implants Market 2027: Healthcare Industry Demand, Growth, Analysis & Forecaston January 14, 2020 at 8:56 am
Moreover, due to growing advancements in technologies such as nano-materials, today physicians can recreate exact replicas of individual ... The study published in the Journal of Tissue Engineering ...
- 3D printing of body parts is coming fast - but regulations are not readyon January 10, 2020 at 6:19 am
Engineers and medical professionals now routinely 3D print prosthetic hands and surgical tools. But 3D printing has only just begun to transform the field. Today, a quickly emerging set of ...
- Impact of Nanomaterials on the Performance of Medical Implantson January 6, 2020 at 10:13 pm
NEW YORK, Jan. 6, 2020 /PRNewswire/ -- Medical implants are devices implanted inside a human body to restore body function or monitor and treat chronic conditions. Driven by the rapid advances in ...
- 2019 Study: The Impact of Nanomaterials on the Performance of Medical Implantson January 6, 2020 at 5:07 pm
DUBLIN, Jan. 6, 2020 /PRNewswire/ -- The "Impact of Nanomaterials on the Performance of Medical Implants" report has been added to ResearchAndMarkets.com's offering. This research service (RS ...
- Impact of Nanomaterials on the Performance of Medical Implantson January 6, 2020 at 4:32 pm
The success rate of the implants can be improved by exploiting nanomaterials and nanotopography to modify the surface features, which interact with the surrounding tissue.This research service (RS ...
- Top 10 Most Stressed Out U.S. Citieson January 2, 2020 at 8:55 am
Working in cooperation with the Consumer Products Safety Commission (CPSC), EPA is studying possible harmful emissions that are emitted during the 3D printing process. Also conducting research on 3D ...
- Energy storage: The future enabled by nanomaterialson November 21, 2019 at 4:00 pm
Already-developed techniques such as 3D printing, roll-to-roll manufacturing, self-assembly from solutions, atomic layer deposition, and other advanced techniques should be used to manufacture devices ...
via Bing News