From Batteries To Water Purifiers, Carbon Nanotubes Are Where It’s At
Lawrence Livermore National Laboratory (LLNL) scientists are scaling up the production of vertically aligned single-walled carbon nanotubes (SWCNT) that could revolutionize diverse commercial products ranging from rechargeable batteries, automotive parts and sporting goods to boat hulls and water filters.
Most CNT production today is used in bulk composite materials and thin films, which rely on unorganized CNT architectures. For many uses, organized CNT architectures such as vertically aligned forests provide important advantages for exploiting the properties of individual CNTs in macroscopic systems.
“Robust synthesis of vertically-aligned carbon nanotubes at large scale is required to accelerate deployment of numerous cutting-edge devices to emerging commercial applications,” said LLNL scientist and lead author Francesco Fornasiero. “To address this need, we demonstrated that the structural characteristics of single-walled CNTs produced at wafer scale in a growth regime dominated by bulk diffusion of the gaseous carbon precursor are remarkably invariant over a broad range of process conditions.”
The team found that the vertically oriented SWCNTs retained very high quality when increasing precursor concentration (the initial carbon) up to 30-fold, the catalyst substrate area from 1 cm2 to 180 cm2, growth pressure from 20 to 790 Mbar and gas flowrates up to 8-fold.
LLNL scientists derived a kinetics model that shows the growth kinetics can be accelerated by using a lighter bath gas to aid precursor diffusion, and that byproduct formation, which becomes progressively more important at higher growth pressure, could be greatly mitigated by using a hydrogen-free growth environment. The model also indicates that appropriate choice of the CNT growth recipe and fluid dynamics conditions can increase the production throughput by 6-fold and the carbon conversion efficiency to higher than 90%.
“These model projections, along with the remarkably conserved structure of the CNT forests over a wide range of synthesis conditions, suggest that a bulk-diffusion-limited growth regime may facilitate preservation of vertically aligned CNT-based device performance during scale up,” said LLNL scientist and first author Sei Jin Park.
The team concluded that operating in a growth regime that is quantitatively described by a simple CNT growth kinetics model can facilitate process optimization and lead to a more rapid deployment of cutting-edge vertically-aligned CNT applications.
Applications include lithium-ion batteries, thermal interfaces, water purification, supercapacitors, breathable fabrics and sensors.
New raw vaccine materials that could make vaccines more accessible, sustainable, and ethical have been discovered. The results of the research have been published in Polymers. Adjuvants are vaccine ingredients that boost a person's immune response [...]
Researchers developed a light yet strong material by combining two unexpected ingredients—DNA and glass. Working at the nanoscale provides scientists with a deep understanding and precision in crafting and analyzing materials. In broader-scale production, and even [...]
Researchers at Houston's Rice University are developing an implant that could diminish deaths caused by cancer by half. The device will contain synthetically nurtured human cells and be embedded with sensors to keep track of cancer [...]
Scientists utilize nanotechnology to address a prevalent cause of vision loss. Scientists have discovered a way to use nanotechnology to create a 3D ‘scaffold’ to grow cells from the retina. This breakthrough could lead [...]
NIH study reviews 25 years of data and finds AI/ML can detect common hormone disorder. Artificial intelligence (AI) and machine learning (ML) can effectively detect and diagnose Polycystic Ovary Syndrome (PCOS), which is the most common [...]
New insights are enhancing scientists’ efforts to stay ahead of COVID-19 and the next pandemic. Unexpected new insights into the ways COVID-19 infects cells could shed light on the virus’s adept ability to jump from one species to another [...]
Researchers want to know why cells produce tiny packages called vesicles — and whether these bundles could be used for therapy. Graça Raposo was a young postdoc in the Netherlands in 1996 when she [...]
Magnetic bacteria possess extraordinary capabilities due to the magnetic nanoparticles, the magnetosomes, which are concatenated inside their cells. A research team at the University of Bayreuth has now transferred all of the approximately 30 [...]
Researchers have invented a nano-thin superbug-slaying material that could one day be integrated into wound dressings and implants to prevent or heal bacterial infections. The innovation – which has undergone advanced pre-clinical trials – [...]
The medial temporal lobe (MTL) houses the human memory system. Broadly, it contains the hippocampus, parahippocampal cortex, perirhinal cortex, and entorhinal cortex. “One big challenge in studying the MTL is its great anatomical variability [...]
C. diff might not originate from external transmission but rather from within the infected patient themselves. Hospital staff dedicate significant effort to safeguard patients from infections during their hospital stay. Through practices ranging from [...]
Google says it has made a significant step in identifying disease-causing genes, which could help spot rare genetic disorders. A new model named AlphaMissense is able to confidently classify 89 per cent of all [...]
MINDWATCH study reveals cognitive peaks with everyday pleasures. Listening to music and drinking coffee are the sorts of everyday pleasures that can impact a person’s brain activity in ways that improve cognitive performance, including [...]
Moderna has developed a new and improved version of its COVID-19 vaccine. The unique formulation (mRNA-1283) reduces the vaccine's content from the full-length SARS-CoV-2 spike protein to a narrowly focused encoding of just two [...]
You can adjust all of your cookie settings by navigating the tabs on the left hand side.
Strictly Necessary Cookies
Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings.
If you disable this cookie, we will not be able to save your preferences. This means that every time you visit this website you will need to enable or disable cookies again.
What Are Cookies
For more general information on cookies see the Wikipedia article on HTTP Cookies.
You can prevent the setting of cookies by adjusting the settings on your browser (see your browser Help for how to do this). Be aware that disabling cookies will affect the functionality of this and many other websites that you visit. Disabling cookies will usually result in also disabling certain functionality and features of the this site. Therefore it is recommended that you do not disable cookies.
The Cookies We Set
Site preferences cookies. In order to provide you with a great experience on this site we provide the functionality to set your preferences for how this site runs when you use it. In order to remember your preferences we need to set cookies so that this information can be called whenever you interact with a page is affected by your preferences.
Third Party Cookies
This site uses Google Analytics which is one of the most widespread and trusted analytics solutions on the web. It helps us to understand how you use the site and ways that we can improve your experience. These cookies may track things such as how long you spend on the site and the pages that you visit so we can continue to produce engaging content. For more information on Google Analytics cookies, see the official Google Analytics page.
Hopefully that has clarified things for you and as was previously mentioned if there is something that you aren’t sure whether you need or not it’s usually safer to leave cookies enabled in case it does interact with one of the features you use on our site.
However if you are still looking for more information then you can contact us through our preferred contact method: