and the polymer ring that protects the electronics in the fish s guts. The long haulthe fish can perform 20
The MIT team found that they could create novel sensors by coating the nanotubes with specifically designed amphiphilic polymers polymers that are drawn to both oil and water, like soap.
or diabetes in living systems. his new technique gives us an unprecedented ability to recognize any target molecule by screening nanotube-polymer complexes to create synthetic analogs to antibody function,
Synthetic antibodies The new polymer-based sensors offer a synthetic design approach to the production of molecular recognition sites enabling, among other applications, the detection of a potentially infinite library of targets.
Their approach takes advantage of a phenomenon that occurs when certain types of polymers bind to a carbon nanotube.
These polymers, known as amphiphilic, have both hydrophobic and hydrophilic regions. These polymers are designed and synthesized such that
when the polymers are exposed to carbon nanotubes, the hydrophobic regions latch onto the tubes like anchors
and the hydrophilic regions form a series of loops extending away from the tubes. These loops form a new layer surrounding the nanotube, known as a corona.
and the polymer before it attaches to the nanotube. he idea is that a chemist could not look at the polymer
because the polymer itself can selectively recognize these molecules. It has to adsorb onto the nanotube and then,
by having certain sections of the polymer exposed, it forms a binding site, Strano says.
The researchers used an automated, robot-assisted trial and error procedure to test about 30 polymer-coated nanotubes against three dozen possible targets, yielding three hits.
They are now working on a way to predict such polymer-nanotube interactions based on the structure of the corona layers,
and their targets. hat happening to the polymer and the corona phase has been a bit of a mystery,
In 2006, Doyle lab developed a way to create huge batches of identical particles made of hydrogel, a spongy polymer.
sprouts a thicket of polymers that attract water, creating an impenetrable barrier for microbes. Its chemical makeup also mimics that of cells important to homeostasis,
In addition to transmitting different kinds of signals, the new fibers are made of polymers that closely resemble the characteristics of neural tissues,
is the fabrication of polymer fibers hat are soft and flexible and look more like natural nerves.
These polymer templates, which can have dimensions on the scale of inches, are heated then until they become soft,
and Edelman originally developed this tissue glue several years ago by combining two polymers dextran (a polysaccharide) and a highly branched chain called dendrimer.
the number of keys attached to each polymer, and the ratio of the two polymers, the researchers can tune it to perform best in different types and states of tissue.
An inherent property of the adhesive is that any unused keys are absorbed back into the polymer,
preventing them from causing any undesired side effects. This would allow the researchers to create two
Brandl had synthesized previously polymers that could be cleaved apart by exposure to UV light. But he and Bertrand came to question their suitability for drug delivery,
because we saw that the particles aggregate once you irradiate them with UV light. trap for ater-fearingpollutionthe researchers synthesized polymers from polyethylene glycol,
Nanoparticles made from these polymers have a hydrophobic core and a hydrophilic shell. Due to molecular-scale forces
and the polymers are biodegradable, minimizing the risks of leaving toxic secondary products to persist in,
from environmental remediation to medical analysis. The polymers are synthesized at room temperature, and don need to be prepared specially to target specific compounds;
the UW-Madison team drew on cutting-edge technologies that use polymers to selectively sort out the semiconducting nanotubes,
and polymers without the involvement of conventional microfabrication techniques yet the thickness and uniformity of the printed films are two of the critical parameters that determine the performance
For this they developed a simple procedure to produce polymer vesicles small artificial bubbles with host cell receptors on the surface.
The preparation of such polymer vesicles with water-soluble host receptors was done by using a mixture of two different block copolymers.
For this work we focused on creating nanostructures using photosensitive polymers which are used commonly in lithography Zhang says.
and polymers. A paper describing this discovery by a research team led by John V. Badding a professor of chemistry at Penn State was published in the Sept. 21 issue of the journal Nature Materials.
The materials commonly used for restoration such as coatings of synthetic polymers or inorganic materials have a different composition than that of the original artefacts
and materials for modern and contemporary works of art such as acrylic paintings plastic sculptures and composite works that include metal textiles polymers etc.
Next a mixture of two polymers are added to the metal substrate to create patterns a process known as diblock copolymer lithography (BCP.
The pattern is transformed in a single polymer mask with nanometer-size features. Last a technique known as anisotropic ion beam milling (IBM) is used to etch through the mask to make an array of holes creating the nanoporous metal.
The high temperature processes essential for high performance electronic devices have restricted severely the development of flexible electronics because of the fundamental thermal instabilities of polymer materials.
These polymer-based nanocomposites are reinforced with graphite nanoplatelets for use in industry. Nanocomposites are formed by two
or more constituents in this case the polymer and a nano-sized reinforcing material: the graphite nanoplatelets s
nanoparticles comprised of a nontoxic biodegradable polymer matrix and insect derived double-stranded ribonucleic acid or dsrna.
Zheng Ling a doctoral student from Dalian spent a year at Drexel spearheading the research that led to the first MXENE-polymer composites.
To produce the flexible conductive polymer nanocomposite the researchers intercalated the titanium carbide MXENE with polyvinyl alcohol (PVA)- a polymer widely used as the paper adhesive known as school
They also intercalated with a polymer called PDDA (polydiallyldimethylammonium chloride) commonly used as a coagulant in water purification systems.
The uniqueness of MXENES comes from the fact that their surface is full of functional groups such as hydroxyl leading to a tight bonding between the MXENE flakes and polymer molecules while preserving the metallic conductivity of nanometer-thin
When mixing MXENE with PVA containing some electrolyte salt the polymer plays the role of electrolyte
ions also stay trapped near the MXENE flakes by the polymer. With these conductive electrodes and no liquid electrolyte we can eventually eliminate metal current collectors
and polymer will affect the properties of the resulting nanocomposite and also exploring other MXENES and stronger and tougher polymers for structural applications.
Explore further: Crumpled graphene could provide an unconventional energy storag g
#Microtubes create cozy space for neurons to grow and grow fast Tiny, thin microtubes could provide a scaffold for neuron cultures to grow
The nanocarriers are made from a polymer called polyethylene glycol (PEG) to which researchers attach the cancer-killing drug camptothecin (CPT) like bunches of grapes on a vine.
Using electron beam lithography she then stamps the pattern onto a polymer matrix and the nanowires are grown by applying electric current through electrodeposition.
The entire structure is surrounded by a polymer matrix. Nath and her research team can produce wires of any shape or size.
The polymer which is nonconductive can be removed to allow the wires to stand freely and yet not lose shape or consistency.
Zang and his team found a way to break up bundles of the carbon nanotubes with a polymer
"By modifying the surface of the nanotubes with a polymer, the material can be tuned to detect any of more than a dozen explosives,
depositing thin films of a uniquely designed polymer on a template so that it self-assembles into neat, precise, even rows of alternating composition just 10 or so nanometers wide.
and IBM Almaden Research center focuses on block copolymers a special class of polymers that under the proper conditions, will segregate on a microscopic scale into regularly spaced"domains"of different chemical composition.
and measure the shape and dimensions of the polymer rows in three dimensions. The experimental techniques can prove essential in verifying
Hence the polymers.""The issue in semiconductor lithography is not really making small featuresou can do thatut you can't pack them close together,
"Block copolymers (BCPS) are a class of materials made by connecting two or more different polymers that,
the BCPS in question will form a thin film in a pattern of narrow, alternating stripes of the two polymer compositions.
Alternatively, they can be designed so one polymer forms a pattern of posts embedded in the other.
Remove one polymer, and in theory, you have a near-perfect pattern for lines spaced 10 to 20 nanometers apart to become, perhaps, part of a transistor array.
although the basic technique was developed using short-wavelength"hard"X rays that have difficulty distinguishing two closely related polymers,
***Unlike the scattering technique, the TEM tomography can actually image defects in the polymer structureut only for a small area.
To overcome this challenge the researchers from the Institute for Integrated Cell-Material Sciences (icems) at Kyoto University borrowed a principle from polymer chemistry
By putting graphene oxide (an oxidized form of graphene) into contact with an oppositely charged polymer the two components could form a stable composite layer a process also known as interfacial complexation.
Interestingly the polymer could continuously diffuse through the interface and induce additional reactions which allowed the graphene-based composite to develop into thick multilayered structures.
The system is built around a polyethylene-glycol-based polymer that carries a small peptide component that allows it to bind preferentially to specific cell types The polymer itself serves as a photosensitizer that can be stimulated by light to release reactive oxygen species (ROS.
The natural fluorescence of the polymer assists with diagnosis and monitoring of therapy as it shows where nanoparticles have accumulated.
The ROS additionally break the link between the polymer and the doxorubicin. Thus cancer cells can be subjected to a two-pronged attack from the ROS therapy
and consists of PDMS#a rubber like polymer with silicon in it. Via this mask a pattern of zinc oxide can be placed on the perovskite for example.
Kim tried adding different polymers to his nanosheets to make them responsive. For this experiment he incorporated a relatively simple polymer that responds to ph. He found that the resulting nanosheet would always curl in basic high ph conditions
and always flatten in acidic low ph conditions. Kim also made his nanosheets responsive to near-infrared light a wavelength of light that is harmless to humans.
creating a responsive nanosheet is just a matter of adding the right polymer. A nanosheet is like pizza dough Kim said.
A nanosheet with a heat-sensitive polymer could burn surrounding tumors to destroy them functioning as a kind of super-specific chemotherapy.
There are tons of smart polymers and metals Kim said explaining the many properties he hopes to incorporate into nanotechnology.
has taken a major step in developing long-sought polymer architecture to boost power-conversion efficiency of light to electricity for use in electronic devices.
but it also solves some instability problems where the materials in mixed blends of polymers tend to lose their phase-separated behavior over time degrading energy transfer the polymer chemist says.
and determined the mechanism of crystallization the polymer chemist adds. Vertical nanopillars are ideal geometries for getting around these challenges Briseno says
They can be mixed in a semiconducting polymer and deposited from solution by simple and inexpensive methods to form thin and flexible solar cells.
In this new study, Dr. Barbero and his team at Umeå University show that this threshold can be reduced by more than 100 times in a semiconducting polymer
The patch is attached to a polymer backbone that can hold a stitch and keep it in place to cover a hole in the heart.
"The researchers use a direct laser writing method called two-photon lithography to"write"a three-dimensional pattern in a polymer by allowing a laser beam to crosslink
and harden the polymer wherever it is focused. The parts of the polymer that were exposed to the laser remain intact
while the rest is dissolved away, revealing a three-dimensional scaffold. That structure can then be coated with a thin layer of just about any kind of material metal, an alloy, a glass, a semiconductor, etc.
Then the researchers use another method to etch out the polymer from within the structure
they coated the polymer scaffold with a ceramic called alumina (i e.,aluminum oxide), producing hollow-tube alumina structures with walls ranging in thickness from 5 to 60 nanometers and tubes from 450 to 1, 380 nanometers in diameter.
In research funded with a grant from the National institutes of health, Saraf and Nguyen perfected a thin film made of nanoparticles and polymers
Teflon is fluorinated a carbon polymer so we thought fluorinated graphene might be like two-dimensional Teflon.
Researchers from Empa and the Max Planck Institute for Polymer Research have developed now a new method to selectively dope graphene molecules with nitrogen atoms.
Fasel's team and colleagues at the Max-Planck-Institute for Polymer Research in Mainz have succeeded in showing that graphene nanoribbons can be transferred efficiently
but immensely powerful batteries) and an array of new materials that could make many of today's common metals and polymers redundant.
Two-dimensional aluminum (Al) nanofiber networks offering transparent conductors were fabricated by simple wet chemical etching of Al metalized polymer films using an electrospun polystyrene nanofiber mask template.
#Eco-friendly'prefab nanoparticles'could revolutionize nano manufacturing A team of materials chemists polymer scientists device physicists
For photovoltaics Venkataraman points out The next thing is to make devices with other polymers coming along to increase power conversion efficiency
Under certain PH conditions they found that graphene behaves like a polymer-changing shape by itself.
The hyaluronan gel contains a mesh of long proteins called polymers; the polymers are large enough to prevent micrometer-sized propellers from moving much at all.
But the openings are large enough for nanometer-sized objects to pass through. The scientists were able to control the motion of the propellers using a relatively weak rotating magnetic field.
The current generation of flexible photoactive materials based on organic polymers have a slow response time (few milliseconds)
Moreover organic polymers suffer from chemical instability at room conditions temperature and pressure) thus requiring extra protective layers
and it is superior to conductive polymers in terms of cost stability and performance; whereas Mos2 is optically active once reduced to a single 2d layer with a fast response time and excellent environmental stability.
One possibility is to use hybrid solar cells that combine silicon nanowires with low-cost, photoresponsive polymers. The high surface area and confined nature of nanowires allows them to trap significant amounts of light for solar cell operations.
The team analyzed the solar cell activity of their nanohole interfaces by coating them with a semiconducting polymer and metal electrodes.
along with Dr. Seok-In Na at Chonbuk National University and Dr. Byoung Gak Kim at KRICT synthesized carbon nanosheets similar to graphene using polymer
The research team synthesized a polymer with a rigid ladder structure namely PIM-1 (Polymer of intrinsic microporosity-1) to form the#through the simpole process
and Complexity have succeeded in developing a new technology that introduces metal nanoparticles on the surface of polymer nanocapsules made of cucurbit 6 uril.
The researchers have found that using polymer nanocapsules made of cucurbit 6 uril and metal salts can serve as a versatile platform where equal sized metal nanoparticles can be distributed evenly on the surface of the polymer nanocapsules.
Cucurbit 6 uril has properties which strongly and selectively recognize organic and inorganic chemical species. This makes it possible to use it as a protecting agent
The metal nanoparticle-decorated polymer nanocapsules exhibit the following properties in water: high stability for up to 6 months;
They are made supramolecular constructs up of building blocks called amphiphilic polymers. These nanocarriers hold the guest molecules within the confines of their water-insoluble interior and use their water-soluble exterior to travel through an aqueous environment.
yet remarkably strong, structure down to the microscaleesigning a system that could be fabricated from a variety of materials, such as metals or polymers,
#Shatterproof screens that save smartphones University of Akron polymer scientists have developed a transparent electrode that could change the face of smartphones, literally,
In a recently published scientific paper, researchers demonstrated how a transparent layer of electrodes on a polymer surface could be extraordinarily tough and flexible,
and replace conventional touchscreens, according to Yu Zhu, UA assistant professor of polymer science. Currently used coatings made of indium tin oxide (ITO) are more brittle,
Taox-capped Pt nanoparticles as efficient catalysts for polymer electrolyte fuel cells More information: Covert thermal barcodes based on phase change nanoparticles Scientific Reports 4 Article number:
explosive derivative drug polymer and ink. This method has high labeling capacity owing to the small sizes of nanoparticles sharp melting peaks
Sandwiched between the two electrodes is a polymer film that acts as a reservoir of charged ions, similar to the role of electrolyte paste in a battery.
the polymer oozes into the tiny pores in much the same way that melted cheese soaks into the nooks and crannies of artisan bread in a Panini.
When the polymer cools and solidifies it forms an extremely strong mechanical bond.""The biggest problem with designing load-bearing supercaps is preventing them from delaminating,
"Combining nanoporous material with the polymer electrolyte bonds the layers together tighter than superglue.""The use of silicon in structural supercapacitors is suited best for consumer electronics and solar cells,
and polymer material to simulate a live explosive in the lab) and identical plastic containers filled with air water or a clay material.#
C Three double-braided polymer tethers prevent the airship from drifting away. One contains copper conductors that transmit power collected as high as 2000 feet down to a battery or the grid.
and polymers to make it as light and flexible as possible the exoskeleton weighs in at around 60kg.
so the team is working on creating a sensitive polymer skin to make the appearance of the hand more realistic and more usable in everyday life situations.
Finally a high energy density Lithium-Ion Polymer battery is used to power all the electronics and actuators contained onboard.
and a two-component thermosetting polymer to build up objects on any working surface that the polymer can adhere to including floors walls and ceilings without the need for additional support structures.
In our case, we used a conductive polymer for the actuators. A feature of these actuators is theye powerful, yet extremely compact.
The motors are six-micrometer-long tubes with an outer polymer surface that holds a chemical enzyme carbonic anhydrase designed to speed up the reaction between carbon dioxide and water and form bicarbonate.
If engineers require a polymer material to have specific properties strength, resilience, size to name a few then we need to question
Geniphys collagen polymers allow scientists to grow cells within a highly reproducible, physiologically relevant 3-D collagen fibril matrix that they can customize.
Harbin's startup Geniphys is currently manufacturing research-grade collagen polymer and standardized polymerization kits that support creation and customization of 3-D cell culture systems.
Rasmussen is a synthetic polymer chemist, who founded RAS Labs in 2003. She began working with PPPL in the early stages of the company from 2007 through 2011.
"Rasmussen holds a Phd in chemistry, specialty polymer chemistry, from Virginia Tech and a master's degree in biology, specialty biophysics, from Purdue University.
The microfluidic chip was designed by Autocad software and manufactured from a widely used silicon-based organic polymer known as PDMS.
#New Polymer Gel Could Create Edible Devices for Ultra-Long Drug Delivery A team of scientists has developed a polymer gel that could allow for the development of long-acting devices that reside in the stomach,
However, these devices, often created with nondegradable elastic polymers, bear an inherent risk of intestinal obstruction as a result of accidental fracture or migration.
Now, researchers at MIT Koch Institute for Integrative Cancer Research and Massachusetts General Hospital (MGH) have created a polymer gel that overcomes this safety concern
This polymer is ph-responsive: It is stable in the acidic stomach environment but dissolves in the small intestine near-neutral ph,
and folding of devices into easily ingestible capsules meaning this polymer can be used to create safe devices designed for extremely prolonged residence in the stomach. ne of the issues with any device in the GI TRACT is that there the potential for an obstruction,
of this new polymer gel for creating gastric devices. Shiyi Zhang, a postdoc at the Koch Institute, is the paper lead author.
the researchers were interested in developing a polymer with elastic properties. n elastic device can be folded into something small,
But the size and shape of existing devices with elastic polymers have been limited by safety concerns,
Because of this, the researchers wanted their polymer to also be enteric or have a mechanism that would enable it to pass through the stomach unaltered before disintegrating in the intestines. o lower any possible risk of obstruction,
the researchers synthesized an elastic polymer and combined it in solution with a clinically utilized enteric polymer.
Adding hydrochloric acid and centrifuging the solution resulted in a flexible, yet resilient, polymer gel that exhibits both elastic and enteric properties.
The researchers used the gel polycaprolactone (PCL), a nontoxic, degradable polyester, to construct several device prototypes.
the polymer gel dissolved, allowing for the safe passage of the small PCL pieces without obstruction.
Improving adherence The combined enteric and elastic properties of this polymer gel could significantly improve the design and adoption of gastric-resident devices.
With further work in adjusting the polymer composition or the design of the system they say that they could tailor devices to release drugs over a specific timeframe of up to weeks or months at a time.
The researchers improved on the conductivity of the graphene by coating it with a thin layer of a polymer that also served as an adhesion layer to the perovskite active layer during the lamination process.
The researchers improved on the conductivity of the graphene by coating it with a thin layer of a polymer that also served as an adhesion layer to the perovskite active layer during the lamination process.
treat cancer, strengthen polymers, sterilize medical devices, and even to make diamonds green and pearls black.
The process begins with liquid polymer and a collector plate. Voltage is applied to the polymer and plate,
which creates a pull to draw the liquid polymer out of its container toward the plate.
As the polymer travels, it becomes increasingly thin. So thin, in fact, that at some point
air resistance actually begins to influence the flow of the liquid, causing the now-thin polymer to become convoluted as it falls onto the collector plate.
During the trip, the polymer solution also converts to a solid. The resulting pattern is a 3d mat of a seemingly random, extremely thin fiber array.
Screen Shot 2015-05-04 at 7. 24.11 AM This filtration membrane is highly flexible and durable
Nebia flat, circular shower head is made of a high-density polymer with nozzles that spray out micro droplets.
The organically designed polymers respond to energetic events such as space debris or bullets rapidly hitting the material.
This is because the polymer reacts to heating. s the bullet goes in it actually raises the temperature around the region,
and it is working to improve on the tensile strength of these polymers, but there is progress here.
The microfluidic chip was made of a silicon-based polymer, polydimethylsiloxane (PDMS), and had microvalves and fluidic channels to transport the sample between nodes for various sample preparation steps.
is pipe-shaped polymer structure with a square cross-section, the inside of which is divided into five adjoining resonance chambers connected via small windows. he resonance achieved by this structure intensifies the evanescent waves,
They attached the 3d printed polymer structure along with microphones, to a robot close to the object surface,
and the method needs to be refined before it can be applied in practice. ecause the size of the polymer structure has to be adjusted to the operational wavelength,
Basically, the OLO uses photopolymer 3d printing technology, wherein liquid polymer hardens when exposed to a light sourcehich in SLA
the polymer foam can be poured into a mold to form a soft yet solid material.
the outside of the organ is coated with the polymer, minus the salt. This prevents the external layer from also becoming permeable and eakingfluid.
3d printing bone requires a combination of a reabsorbable material such as a biodegradable polymer and an inorganic bioactive phase material such as ceramics.
The polymer they used was a material that is rather easy to 3d print and that was approved FDA for use in implants:
and polymers are used widely as bone regenerators and biocompatible functional materials in tissue engineering, as they are very similar to the natural bone tissue,
by adding conducting CNTS into the bioprinted polymer and mineral prosthetic bone implant, you can stimulate the regrowth of the actual bone cells.
while the polymer-based support dissolves efficiently. These research lines also involve the production and study of bioceramic systems for the controlled release of biotechnological and antitumoral species
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