Small graphene spikes can slice open and kill bacteria. This creates a protective surface against infection.
I have seen conflicting results about anti bacterial properties of graphene so I personally find it satisfying that the group at Chalmers University of Technology discovered what kills the bacteria is not graphene itself but the vertical orientation of the flakes that act as tiny knives.
These small vertical flakes can damage and slice open the bacteria but because human cells are so much larger ( 25 micrometer vs 1 um) it doesn’t damage the human cells. Another cool thing is that they used PECVD (Plasma-Enhanced Chemical Vapor Deposition) to create these flakes which makes the layer of carbon grows vertically instead of horizontally.
Great visit to the University of Mississippi and its Center for Manufacturing Excellence. Spent the day with new NGA corporate partner, Curadite, Inc. from California, along with some NanoTek folks. We all had a blast in Oxford with unrivaled Southern hospitality and lots of wonderful Southern food!
Most conversations revolved around incorporating graphene in Curadite design…challenges, next steps, potential partners.
Curadite is focused on disposable, sensor-enabled drug packaging to manage the opioid crisis in the US.
“The Curadite platform transforms the simple plastic pill bottle into a cellular enabled blister pack that tracks patient engagement in real-time. Compliance is supported with personalized text/call reminders using 4G cellular technology. ”
We discussed the integration of graphene, 2D printing and nanosilver to elevate the design, bring substantial advantages and also reduce the cost.
A good point brought up by CEO Dennis McNanny was that when we are prescribed opioids for a certain medical condition for a short amount of time it is considered a medication; after that period has elapsed, however, the same medication is then classified as a “drug.” Many addictions start with teens stealing pills from a family member.
The Curadite cloud-based design allows for warnings to be sent to the person after a blister pack is opened, so every pill is accounted for. Graphene can enable more secure and more sensitive packaging options, and I personally look forward to the outcome of this collaboration!
The existence of G+ in these tires reduces rolling resistance and increasing grip (G+ is Directa Plus‘s brand of Graphene Nano Platelets).
The result is a tire that is both faster in motion and safer in turning under braking or in extreme weather conditions.
Good for those of us who like to drive!
“The benefits of incorporating G+ into tyres have been demonstrated by the Company’s longstanding relationship with Vittoria group, a leading manufacturer of bicycle tyres. Vittoria has launched multiple award-winning G+ bicycle tyres for on-road and off-road use. The Company is also conducting ongoing tests with other automotive and potential industrial partners of its G+ elastomeric composition for tyres.”
We saw a great talk on this by Deji Akinwande at the Graphene Innovation Summit in October in Nashville.
“The graphene tattoo is a dry physiological sensor which, because of its thinness, forms an ultra-conformal contact to skin, resulting in increased signal fidelity,” said co-author of the work Shideh Kabiri Ameri. “Conformability results in less susceptibility to motion artifacts, which is one the biggest drawbacks of conventional dry sensors and electrodes for physiological measurements.”
Last week, I asked Shideh on Linkedin, “How is the progress? Can you share any updates on the project?”
“Dear Zina, Thank you for asking. We recently lowered the thickness of the second version of the graphene electronic tattoo sensors by 25%, down to 350 nanometer. Our latest manuscript is under review and will be published soon.”
This should be interesting…looking forward to hearing more on the work.
A part of this study focuses on use of honey as an organic exfoliating agent to produce graphene and Graphene Nano Platelets.
Here’s Adrian’s comment that I received earlier today:
“Hi Zina Jarrahi Cinker,
Yes you have quite rightly focused in on the role of honey as the exfoliating agent. The team in China thought that there were two reasons honey was so good. i) It had a similar surface energy to graphene ii) It had the right viscosity to help the nanoplates slide apart in the roll mill. I’m more inclined to think the viscosity is the key factor here, but if you know better I’ll defer to your expert opinion. Good to hear from you, hope all that travelling around DC pays off.
A bio-inspired material that combines a soft, self-healing polymer with a tough layer of graphene oxide could be the basis of new, ultra-tough scratch resistant coatings.
“The material features a soft self-healing layer, a mixture of tannic acid and polyvinylalcohol (PVA) which form a dynamic hydrogen-bonded network. But this is reinforced by an outer PVA layer containing nanosheets of graphene oxide – a tough material that gives greater scratch resistance. This is similar, Yang says, to the structure of the skin epidermis, where hardened outer cells protect the soft, living tissue beneath, which can repair damage.”
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