#Making polymer nanostructures from a greenhouse gas (Nanowerk News) A future where power plants feed their carbon dioxide directly into an adjacent production facility instead of spewing it up a chimney
In the journal Angewandte Chemie("Construction of Versatile and Functional Nanostructures Derived from CO2-based Polycarbonates),
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
and one oxygen atom) can be polymerized to form polycarbonates in reactions that use special catalysts.
#Boron Turns Graphene into Blue light Emitter FRANKFURT, Germany, July 14, 2015 Chemists at Goethe University Frankfurt have developed a new class of organic luminescent materials through the targeted introduction of boron
atoms into graphene. The compounds exhibit an intense blue fluorescence and, consequently, are of interest for use as organic LEDS (OLEDS).
Within graphene, benzene rings are fused to form a honeycomb structure. Sections of this structure, referred to as nanographenes or polycyclic aromatic hydrocarbons (PAHS), play an integral role in organic electronics.
Within the study, boron atoms specifically replaced the two meso carbon atoms within the PAH, which resulted in its ability to transform a near-infrared dye into a blue luminophore.
The boron-containing nanographenes have an impact on two key properties of an OLED luminophore
"For a long time, efforts were focused largely on affecting the properties of nanographenes by chemically manipulating their edges,
Hertz and Wagner anticipate that such materials like the graphene flakes they developed will be particularly suitable for use in portable electronic devices,
#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)
so your body's immune system won't try and interfere with them as they deliver their medicine."
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."
#Nanowire clothing could keep people warm without heating everything else To stay warm when temperatures drop outside,
But scientists have developed now a novel nanowire coating for clothes that can both generate heat
the special nanowire cloth trapped body heat far more effectively. Because the coatings are made out of conductive materials,
Use of nanotechnology in cosmetics and pharmaceuticals A Faculty of science Universiti Putra Malaysia (UPM) lecturer Professor Dr Mahiran Basri not only succeeded in producing new useful substances made of oils
This organic synthesis uses enzymes and it is produced through nanotechnology. Our focus is to process new substances derived from oils
and antiaging substances through the use of nanotechnology those substances can easily absorb through the skin.
'Thus we created drugs through nanotechnology and that way we hope they are more effective she said.
which increasingly benefits both micro-and nanoelectronics. The integration of optical components is advanced already well in many areas.
However in spite of intensive research a laser source that is compatible with the manufacturing of chips is not yet achievable according to the head of Semiconductor Nanoelectronics (PGI-9). The basis of chip manufacturing is silicon an element of main group IV of the periodic table.
That way we were able to demonstrate that the germanium-tin compound can amplify optical signals as well as generate laser light reports Dr. Hans Sigg from the Laboratory for Micro and Nanotechnology.
transparent nanomaterial made from wood. Compared to other polymers like plastics, the wood nanomaterial is biocompatible
and has relatively low thermal expansion coefficient, which means the material won't change shape as the temperature changes.
#Nanoscale light-emitting device has big profile University of Wisconsin-Madison engineers have created a nanoscale device that can emit light as powerfully as an object 10,000 times its size.
and his collaborators describe a nanoscale device that drastically surpasses previous technology in its ability to scatter light.
They showed how a single nanoresonator can manipulate light to cast a very large"reflection."
"The nanoresonator's capacity to absorb and emit light energy is such that it can make itself--and, in applications,
Given the nanoresonator's capacity to absorb large amounts of light energy, the technology also has potential in applications that harvest the sun's energy with high efficiency.
Because the nanoresonator has a large optical cross-section--that is, an ability to emit light that dramatically exceeds its physical size--it can shed a lot of heat energy,
so Bailie did it manually. e used a sheet of plastic with silver nanowires on it, he said. hen we built a tool that uses pressure to transfer the nanowires onto the perovskite cell, kind of like a temporary tattoo.
You just need to rub it to transfer the film. Remarkable efficiency For the experiment, the Stanford team stacked a perovskite solar cell with an efficiency of a 12.7 percent on top of a low-quality silicon cell with an efficiency of just 11.4 percent. y combining two cells
has been developing sustainable nanomaterials since 2009. f you take a big tree and cut it down to the individual fiber,
#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).
This is very important and useful, since human immune system fails to recognize anything under 10 nanometres,
which allows for a better therapeutic potential. The team of researchers tested the therapeutic potential of these carbon nanoparticles by loading them with an anti-melanoma drug
and mixing them in a topical solution that was applied to pig skin. However, scientists have to make sure they coated particles properly,
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.
#New nanogenerators collect friction energy from rolling tires Team of engineers from University of Wisconsin-Madison and a collaborator from China have developed a new nanogenerator that is able to generate power from friction created by rolling
The nanogenerator harvests the wasted tire friction energy by relying on the triboelectric effect. It is the electric charge that results from the contact or rubbing together of two dissimilar objects.
and see how these nanogenerators develop and when they will be introduced for practical application c
#Nanotech transforms cotton fibers into modern marvel Marcia Silva da Pinto, postdoctoral researcher, works on growing metal organic frameworks onto cotton samples to create a filtration system capable of capturing toxic gas,
as Juan Hinestroza looks on. Juan Hinestroza and his students live in a cotton-soft nano world,
who directs the Textiles Nanotechnology Laboratory at Cornell. n a nanoscale world and that is our world we can control cellulose-based materials one atom at a time. he Hinestroza group has turned cotton fibers into electronic components such as transistors and thermistors,
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,
can be manipulated at the nano level to build nanoscale cages that are the exact same size as the gas they are trying to capture. e wanted to harness the power of these molecules to absorb gases
#Environmentally Friendly Lignin Nanoparticle reenssilver Nanobullet to Battle Bacteria 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,
greener and safer nanotechnology and could lead to enhanced efficiency of antimicrobial products used in agriculture and personal care.
In a study published in Nature Nanotechnology, 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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