Carbon nanoparticles you can make at home June 18th, 201 0
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#Environmentally friendly lignin nanoparticle'greens'silver nanobullet to battle bacteria Abstract: Silver nanoparticles have antibacterial properties,
but their use has been a cause for concern because they persist in the environment. Here, we show that lignin nanoparticles infused with silver ions
and coated with a cationic polyelectrolyte layer form a biodegradable and green alternative to silver nanoparticles.
The polyelectrolyte layer promotes the adhesion of the particles to bacterial cell membranes and, together with silver ions, can kill a broad spectrum of bacteria,
Ion depletion studies have shown that the bioactivity of these nanoparticles is limited time because of the desorption of silver ions.
when compared to an equivalent mass of metallic silver nanoparticles or silver nitrate solution. Our results demonstrate that the application of green chemistry principles may allow the synthesis of nanoparticles with biodegradable cores that have higher antimicrobial activity and smaller environmental impact than metallic silver nanoparticles.
North carolina State university researchers have developed an effective and environmentally benign method to combat bacteria by engineering nanoscale particles that add the antimicrobial potency of silver to a core of lignin,
NC State engineer Orlin Velev and colleagues show that silver-ion infused lignin nanoparticles, which are coated with a charged polymer layer that helps them adhere to the target microbes,
As the nanoparticles wipe out the targeted bacteria, they become depleted of silver. The remaining particles degrade easily after disposal because of their biocompatible lignin core,
"People have been interested in using silver nanoparticles for antimicrobial purposes, but there are lingering concerns about their environmental impact due to the long-term effects of the used metal nanoparticles released in the environment,
"said Velev, INVISTA Professor of Chemical and Biomolecular engineering at NC State and the paper's corresponding author."
"The researchers used the nanoparticles to attack E coli, a bacterium that causes food poisoning; Pseudomonas aeruginosa, a common disease-causing bacterium;
The nanoparticles were effective against all the bacteria. The method allows researchers the flexibility to change the nanoparticle recipe in order to target specific microbes.
Alexander Richter, the paper's first author and an NC State Ph d. candidate who won a 2015 Lemelson-MIT prize,
Ultrasonic waves are also the cause of the homogenous distribution of simultaneous charges of silver and nitrogen on the surfaces of zinc oxide nanoparticles.
such as solutions made from metal nanoparticles. To make the ink, graphene flakes are mixed with a solvent,
Taking advantage of cottons irregular topography, Hinestroza and his students added conformal coatings of gold nanoparticles,
Synthesizing nanoparticles and attaching them to cotton not only creates color on fiber surfaces without the use of dyes,
#Environmentally friendly lignin nanoparticle'greens'silver nanobullet to battle bacteria North carolina State university researchers have developed an effective
In a study published in Nature Nanotechnology("An environmentally benign antimicrobial nanoparticle based on a silver-infused lignin core),
"NC State engineer Orlin Velev and colleagues show that silver-ion infused lignin nanoparticles, which are coated with a charged polymer layer that helps them adhere to the target microbes,
As the nanoparticles wipe out the targeted bacteria, they become depleted of silver. The remaining particles degrade easily after disposal because of their biocompatible lignin core,
People have been interested in using silver nanoparticles for antimicrobial purposes, but there are lingering concerns about their environmental impact due to the long-term effects of the used metal nanoparticles released in the environment,
said Velev, INVISTA Professor of Chemical and Biomolecular engineering at NC State and the papers corresponding author.
The researchers used the nanoparticles to attack E coli a bacterium that causes food poisoning; Pseudomonas aeruginosa, a common disease-causing bacterium;
The nanoparticles were effective against all the bacteria. The method allows researchers the flexibility to change the nanoparticle recipe in order to target specific microbes.
Alexander Richter, the papers first author and an NC State Ph d. candidate who won a 2015 Lemelson-MIT prize,
#New study shows how nanoparticles can clean up environmental pollutants Many human-made pollutants in the environment resist degradation through natural processes,
In a new paper published this week in Nature Communications("Nanoparticles with photoinduced precipitation for the extraction of pollutants from water and soil),
"researchers from MIT and the Federal University of Goiás in Brazil demonstrate a novel method for using nanoparticles
Nanoparticles that lose their stability upon irradiation with light have been designed to extract endocrine disruptors, pesticides,
The system exploits the large surface-to-volume ratio of nanoparticles, while the photoinduced precipitation ensures nanomaterials are released not in the environment.
They initially sought to develop nanoparticles that could be used to deliver drugs to cancer cells. Brandl had synthesized previously polymers that could be cleaved apart by exposure to UV LIGHT.
Nanoparticles made from these polymers have a hydrophobic core and a hydrophilic shell. Due to molecular-scale forces
in a solution hydrophobic pollutant molecules move toward the hydrophobic nanoparticles, and adsorb onto their surface,
The fundamental breakthrough, according to the researchers, was confirming that small molecules do indeed adsorb passively onto the surface of nanoparticles. o the best of our knowledge,
it is the first time that the interactions of small molecules with preformed nanoparticles can be measured directly,
we showed in a system that the adsorption of small molecules on the surface of the nanoparticles can be used for extraction of any kind,
and can aggregate into nanoparticles or micelles. Versatile nanostructures made from CO2 based polycarbonates. Wiley-VCH) CO2 and epoxides (highly reactive compounds with a three-membered ring made of two carbon atoms
#Here's how to make carbon nanoparticles with honey and a microwave Carbon nanoparticles can be incredibly useful in the treatment of many types of disease,
as they can evade our natural immune defences and deliver medicine to wherever it's most needed in the body.
but so far creating these nanoparticles has been a long and expensive process. Now researchers at the University of Illinois in the US have found a much easier way to create a certain type of nanoparticle:
using a process that involves plain old honey and a microwave. The resulting particles are less than 8 nanometres thick (a human hair is around 80,000-100,000 nanometres)
but that is nanoparticles with high luminescence. This is one of the simplest systems that we can think of.
the microwave-produced nanoparticles are effective in delivering the drugs where they're needed, and vibrational spectroscopic techniques were used to monitor how the polymers gradually released their payload.
Different polymer coatings were tested too as the team works towards getting these'homemade'carbon nanoparticles ready for clinical use."
#New way to produce carbon nanoparticles found only honey and microwave needed Researchers at University of Illinois have created a new inexpensive and simple way to produce carbon nanoparticles.
They are small enough to evade the body immune system, reflect light in the near-infrared range for easy detection,
However, when usual methods to produce carbon nanoparticles are rather complex and can take days,
and time that these carbon nanoparticles can virtually be made at home. Dipanjan Pan bioengineering professor one of authors of the study, said that you just have to mix honey
but that is nanoparticles with high luminescence This method is extremely simple and highly scalable for eventual clinical use.
These carbon nanoparticles produced in such a simple and inexpensive way have several attractive properties.
Finally, carbon nanoparticles are rather small, less than eight nanometres in diameter (in comparison, a human hair is 80,000 to 100,000 nanometres thick).
The team of researchers tested the therapeutic potential of these carbon nanoparticles by loading them with an anti-melanoma drug
so they used vibrational spectroscopic techniques to identify the molecular structure of the nanoparticles and their cargo.
The experiment showed that the carbon nanoparticles did not release the drug payload at room temperature
Study showed that cancer cells were affected positively by drugs delivered by these carbon nanoparticles. These carbon nanoparticles,
despite being made from honey in the microwave, are very useful indeed. They can be used to carry a variety of different drugs into a human body.
having in mind that currently production of carbon nanoparticles requires expensive equipment and purification processes that can take days.
Taking advantage of cotton irregular topography, Hinestroza and his students added conformal coatings of gold nanoparticles,
Synthesizing nanoparticles and attaching them to cotton not only creates color on fiber surfaces without the use of dyes,
#Environmentally Friendly Lignin Nanoparticle reenssilver Nanobullet to Battle Bacteria North carolina State university researchers have developed an effective
NC State engineer Orlin Velev and colleagues show that silver-ion infused lignin nanoparticles, which are coated with a charged polymer layer that helps them adhere to the target microbes,
As the nanoparticles wipe out the targeted bacteria, they become depleted of silver. The remaining particles degrade easily after disposal because of their biocompatible lignin core,
limiting the risk to the environment. eople have been interested in using silver nanoparticles for antimicrobial purposes, but there are lingering concerns about their environmental impact due to the long-term effects of the used metal nanoparticles released in the environment,
said Velev, INVISTA Professor of Chemical and Biomolecular engineering at NC State and the paper corresponding author. e show here an inexpensive and environmentally responsible method to make effective antimicrobials with biomaterial cores. he researchers used the nanoparticles
to attack E coli, a bacterium that causes food poisoning; Pseudomonas aeruginosa, a common disease-causing bacterium; Ralstonia, a genus of bacteria containing numerous soil-borne pathogen species;
The nanoparticles were effective against all the bacteria. The method allows researchers the flexibility to change the nanoparticle recipe in order to target specific microbes.
Alexander Richter, the paper first author and an NC State Ph d. candidate says that the particles could be the basis for reduced risk pesticide products with reduced cost
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