#Nanowire implants offer remote-controlled drug delivery Abstract: Remote-controlled Eradication of Astrogliosis in Spinal cord Injury via Electromagnetically-induced Dexamethasone Release from"Smart"Nanowireswen Gao and Richard Borgenswe describe a system to deliver drugs to selected tissues continuously,
novel vertically aligned electromagnetically-sensitive Polypyrrole Nanowires (Ppynws). Approximately 1-2mm 2 Dexamethasone (DEX) doped Ppynws was lifted on a single drop of sterile water by surface tension,
A team of researchers has created a new implantable drug-delivery system using nanowires that can be controlled wirelessly.
The nanowires respond to an electromagnetic field generated by a separate device, which can be used to control the release of a preloaded drug.
The nanowires are made of polypyrrole, a conductive polymer material that responds to electromagnetic fields. Wen Gao, a postdoctoral researcher in the Center for Paralysis Research who worked on the project with Borgens
grew the nanowires vertically over a thin gold base, like tiny fibers making up a piece of shag carpet hundreds of times smaller than a human cell.
The nanowires can be loaded with a drug and, when the correct electromagnetic field is applied, the nanowires release small amounts of the payload.
This process can be started and stopped at will, like flipping a switch, by using the corresponding electromagnetic field stimulating device,
and transported a patch of the nanowire carpet on water droplets that were used used to deliver it to the site of injury.
The nanowire patches adhere to the site of injury through surface tension Gao said. The magnitude and wave form of the electromagnetic field must be tuned to obtain the optimum release of the drug,
The electromagnetic field is likely affecting the interaction between the nanomaterial and the drug molecules, Borgens said."
Functional Drug Delivery Using Electromagnetic field-Responsive Polypyrrole Nanowires, "was published in the journal Langmuir. Other team members involved in the research include John Cirillo,
A 1-2 millimeter patch of the nanowires doped with dexamethasone was placed onto spinal cord lesions that had been exposed surgically,
and those that received a nanowire patch but were exposed not to the electromagnetic field. In some cases, treated mice had no detectable GFAP signal.
'Copyright Purdue Universityissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Cancer Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015news and information Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
New technique creates multilayered, self-assembled grids with fully customizable shapes and compositions June 23rd,
2015nanomedicine Nanoparticle'wrapper'delivers chemical that stops fatty buildup in rodent arteries Experimental therapy restores normal fat metabolism in animals with atherosclerosis June 23rd, 2015picosun ALD
2015discoveries Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015announcements Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Nanoparticle'wrapper'delivers chemical that stops fatty buildup in rodent arteries Experimental therapy restores normal fat metabolism
San diego, report their success in Nature Nanotechnology.""Our work demonstrates new properties of polaritonic waves can be achieved by artificially combining different materials,
'858-246-0161copyright University of California-San Diegoissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
2015imaging Robust new process forms 3-D shapes from flat sheets of graphene June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
A simple reversible process that changes friction in the nanoworld June 22nd, 2015graphene heat-transfer riddle unraveled June 17th, 2015framework materials yield to pressure June 11th, 2015govt.
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
2015robust new process forms 3-D shapes from flat sheets of graphene June 23rd, 2015sweeping lasers snap together nanoscale geometric grids:
4-D printing to advance chemistry, materials sciences and defense capabilities June 18th, 2015discoveries Nanometric sensor designed to detect herbicides can help diagnose multiple sclerosis June 23rd, 2015sweeping lasers snap together
nanoscale geometric grids: New technique creates multilayered, self-assembled grids with fully customizable shapes and compositions June 23rd,
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
Carbon nanoparticles you can make at home June 18th, 201 0
#Biomanufacturing of Cds quantum dots: A bacterial method for the low-cost, environmentally-friendly synthesis of aqueous soluble quantum dot nanocrystals Abstract:
A team of Lehigh University engineers have demonstrated a bacterial method for the low-cost, environmentally friendly synthesis of aqueous soluble quantum dot (QD) nanocrystals at room temperature.
Principal researchers Steven Mcintosh, Bryan Berger and Christopher Kiely, along with a team of chemical engineering, bioengineering,
scalable and green synthesis of Cds nanocrystals with extrinsic crystallite size control in the quantum confinement range.
The result is Cds semiconductor nanocrystals with associated size-dependent band gap and photoluminescent properties. This biosynthetic approach provides a viable pathway to realize the promise of green biomanufacturing of these materials.
'610-758-6656copyright Lehigh Universityissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
News and information Scientists highlight the importance of nanoscale hybrid materials for noninvasive cancer diagnosis June 24th,
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
and the Environment June 24th, 2015discoveries Scientists highlight the importance of nanoscale hybrid materials for noninvasive cancer diagnosis June 24th,
2015announcements Scientists highlight the importance of nanoscale hybrid materials for noninvasive cancer diagnosis June 24th, 2015physicists fine-tune control of agile exotic materials:
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
and the Environment June 24th, 2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Scientists highlight the importance of nanoscale hybrid materials for noninvasive cancer diagnosis June 24th,
Both outputs support the Nanotechnology Signature Initiative Nanotechnology for Sensors and Sensors for Nanotechnology: Improving and Protecting Health, Safety,
2015next-generation illumination using silicon quantum dot-based white-blue LED June 7th, 201 0
#World#s 1st Full-Color, Flexible, Skin-Like Display Developed at UCF A breakthrough in a University of Central Florida lab has brought those scenarios closer to reality.
A team led by Professor Debashis Chanda of UCF Nanoscience Technology Center and the College of Optics and Photonics (CREOL) has developed a technique for creating the world first full-color,
A thin liquid crystal layer is sandwiched over a metallic nanostructure shaped like a microscopic egg carton that absorbs some light wavelengths
Dr Thomas Bointon, from Moorfield Nanotechnology and former Phd student in Professor Craciun's team at Exeter added:"
#Green Chemistry Methods Used in Iran to Produce Zinc oxide nanoparticles Iranian researchers used a new method based on green chemistry to synthesize zinc oxide nanoparticles.
In this research, biocompatible nanoparticles based on zinc oxide were synthesized through green chemistry standards. Carrying out all reactions in the green solvent of water
The industrial and usual application of zinc oxide nanoparticles is in rubber industry due to its isolation against electricity
The use of zinc oxide nanoparticles in rubber leads to the smooth appearance of the rubber, increases its durability, maintains its strength at high temperature and increases the life of the rubber.
In addition, zinc oxide nanoparticles can have new applications in optoelectronics, sensors, transformators, and medical industries due to their properties, including semi-conductivity,
"This gives us unparalleled insight into nanoparticle structure and would be impossible to achieve without combining two complementary operando techniques."
They conducted x-ray studies at the National Synchrotron Light source (NSLS) and electron microscopy at the Center for Functional Nanomaterials (CFN), both DOE Office of Science User Facilities."
a focused electron beam passes through the sample and captures images of the nanoparticles within.
Particles smaller than a single nanometer were hidden behind what we call the resolution curtain of the technique."
and removed the TEM results covering particles larger than one nanometer--the remainder fills in that crucial subnanometer gap in our knowledge of catalyst size
Each of these microscale poles is covered with billions of nanoscale poles. In physics it is called Heterogeneous superhydrophobic surface.
'Copyright Canadelectrochimissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
News and information June 29th, 2015efforts to Use Smart Nanocarriers to Cure Leukemia Yield Promising Results June 29th, 2015making new materials with micro-explosions:
2015green Chemistry Methods Used in Iran to Produce Zinc oxide nanoparticles June 27th, 2015laser spectroscopy: A novel microscope for nanosystems June 25th, 2015iranian Researchers Synthesize Nanostructures with Controlled Shape, Structure June 25th, 2015discoveries June 29th, 2015efforts to Use Smart Nanocarriers to Cure Leukemia Yield
Promising Results June 29th, 2015making new materials with micro-explosions: ANU media release: Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon,
New technique combines electron microscopy and synchrotron X-rays to track chemical reactions under real operating conditions June 29th, 2015announcements June 29th, 2015efforts to Use Smart Nanocarriers to Cure Leukemia Yield Promising
Updates to the Basis of the Company's Industry-Changing Nanotechnology Designed to Strengthen Position in Global Air, Energy,
Magnetic organometallic framework (MOF) nanocomposite has been used to selectively separate these metals from the foodstuff and their pre-concentration.
Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content. Bookmark: News and information Samsung's New Graphene technology Will Double Life Of Your Lithium-Ion Battery July 1st,
2015philips Introduces Quantum dot TV with Color IQ Technology from QD Vision: Manufacturer is first to offer quantum dot displays for both TVS and monitors June 30th,
2015carnegie Mellon chemists characterize 3-D macroporous hydrogels: Methods will allow researchers to develop new'smart'materials June 30th, 2015discoveries Chitosan coated,
chemotherapy packed nanoparticles may target cancer stem cells June 30th, 2015graphene flexes its electronic muscles: Rice-led researchers calculate electrical properties of carbon cones, other shapes June 30th,
2015high-tech nanofibres could help nutrients in food hit the spot June 17th, 2015the European project SVARNISH,
#Leti Announces Launch of First European Nanomedicine Characterisation Laboratory: Project Combines Expertise of 9 Partners in 8 Countries to Foster Nanomedicine Innovation and Facilitate Regulatory Approval CEA-Leti today announced the launch of the European Nano-Characterisation Laboratory (EU
-NCL) funded by the European union Horizon 2020 research and innovation programm 1 e. Its main objective is to reach a level of international excellence in nanomedicine characterisation for medical indications like cancer, diabetes, inflammatory diseases or infections,
and make it accessible to all organisations developing candidate nanomedicines prior to their submission to regulatory agencies to get the approval for clinical trials and, later,
marketing authorization. s reported in the ETPN White paper 2, there is a lack of infrastructure to support nanotechnology-based innovation in healthcare,
said Patrick Boisseau, head of business development in nanomedicine at CEA-Leti and chairman of the European Technology Platform Nanomedicine (ETPN).
anocharacterisation is the first bottleneck encountered by companies developing nanotherapeutics. The EU-NCL project is of most importance for the nanomedicine community,
as it will contribute to the competiveness of nanomedicine products and tools and facilitate regulation in Europe.
EU-NCL is partnered with the sole international reference facility, the Nanotechnology Characterization Lab of the National Cancer Institute in the U s. US-NCL) 3,
to get faster international harmonization of analytical protocols. e are excited to be part of this cooperative arrangement between Europe
and the U s.,said Scott E. Mcneil, director of U s. NCL. e hope this collaboration will help standardize regulatory requirements for clinical evaluation and marketing of nanomedicines internationally.
This venture holds great promise for using nanotechnologies to overcome cancer and other major diseases around the world.
EU-NCL is connected also closely to national medicine agencies and the European Medicines Agency to continuously adapt its analytical services to requests of regulators.
as it will be the first transnational infrastructure in nanomedicine. It aims at fostering innovation by sharing knowledge and technologies between academia and industry.
in-vitro and in vivo biological testing), allowing researchers to fully comprehend the biodistribution, metabolism, pharmacokinetics, safety profiles and immunological effects of their medicinal nanoproducts.
To foster the use and deployment of standard operating procedures (SOPS), benchmark materials and quality management for the preclinical characterisation of medicinal nanoproducts.
and will also develop new or improved analytical assays to keep EU-NCL at the cutting edge of nanomedicine characterisation.
"This technology can actively stabilize two items relative to each other with a precision well below one nanometer at room temperature,
"This level of 3d stability may start to interest the nanomanufacturing world, when they look at making
and characterizing things on the single-nanometer scale.""The work builds on JILA's world-leading expertise in measuring positions of microscopic objects.
The instrument must be stable to within about one-tenth of a nanometer (1 angstrom to biologists, equivalent to the diameter of a hydrogen atom.
it can reliably achieve tenth of a nanometer stability for up to 100 seconds at a time. And it can do this over and over again for extended periods--the JILA team operated the system for up to 28 hours straight.
Gold nanoparticles have been used in the production of the biosensor. The four-strand structure of DNA plays an important role in the process of creation of cancerous cells and in the prohibition of a type of active enzyme in cancers.
and gold nanoparticles was used as an appropriate bed for the production of biosensors to detect four-strand structure of DNA
Winner of the 2015 Lindros Award for translational medicine, Kjeld Janssen is pushing the boundaries of the emerging lab-on-a-chip technology The postage stamp-sized square of fused silica Kjeld Janssen is holding
The $10, 000 grant provided by the award will be used in direct support of the development of the Omnisense lab-on-a-chip. he promise and delivery of high-throughput, real-time,
For his postdoctoral work, he studied the downscaling of bioanalytical techniques to the nanoscale, taking
He worked more than two years in industry, developing lab-on-a-chip technology for Medimate B. V, . before crossing the Atlantic to land in Pennathur lab. At UCSB,
"These samples displayed structures not smaller than 75 nanometres. But with this method we should be able to see even smaller structures
and obtain a resolution of 20 nanometres, "explains Florian Kronast. However, so far only electron holography could be considered for mapping magnetic domains of three-dimensional objects at the nanometre scale.
This required very complicated sample preparation and the magnetisation could only be determined indirectly through the resulting distribution of the magnetic field."
Published in Nanomedicine, the study identified a new mechanism of targeting multi-subunit complexes that are critical to the function of viruses, bacteria or cancer,
director of UK's Nanobiotechnology Center and one of the top nanobiotechnology experts in the world.
"##Guo focuses much of his work on the use of ribonucleic acid (RNA) nanoparticles and a viral nanomotor to fight cancer, viral infections and genetic diseases.
He is well-known for his pioneering work of constructing RNA nanoparticles as drug carriers. Guo's research team also includes Dan Shu, Farzin Haque, Mario Vieweger, Fengmei Pi, Hui Zhang, Yi Shu, Chi Wang, Peng Zhang, Ashwani
and Northwestern University described their new method for the syntheses and fabrication of mesocopic three-dimensional semiconductors (intermediate between the nanometer and macroscopic scales)."
to promote the growth of silicon nanowires and to induce gold-based patterns in the silicon.
#Nanometer catalyst cleans up bad cigarette smoke in smoking room: The air cleaning equipment developed by KIST can purify 100 percent of it within 1 hour in a 30 square meter smoking room,
KIST has developed a nanocatalyst filter coated with a manganese oxide-based nanocatalyst, which can be used in a smoking room to reduce
The research team has developed a nanocatalyst filter by evenly coating a manganese oxide-based (Mn/Tio2)) nanocatalyst powder onto a ceramic-based filter media.
The nanocatalyst filter uses a technology that decomposes elements of cigarette smoke using oxygen radical,
which is generated by decomposing ozone in the air on the surface of the manganese-oxide-based nanocatalyst filter.
the research team made an air cleaning equipment prototype using the nanocatalyst filter. The equipment was installed in an actual smoking room in the size of 30 square meters (with processing capacity of 4 CMM.
or so to commercialize this technology as the nanocatalyst and the filter coating technologies had been developed already.
Also, from the convergence perspective, the new nanometer catalyst filter can be integrated with other air cleaning products such as air purifiers and air conditioners."
and has eight Areas of Advance Built environment, Energy, Information and Communication Technology, Life science, Materials science, Nanoscience and Nanotechnology, Production, and Transportation.
'Copyright Alphagalileo Ltdissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Full bibliographic information News and information Scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th,
2015human color vision gives people the ability to see nanoscale differences July 9th, 2015new micro-supercapacitor structure inspired by the intricate design of leaves:
Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th, 2015bbc World Service to broadcast
2015irt Nanoelec Partners Achieve 3d Chip-stacking Technology & 3d Network-on-chip Framework for Digital Processing July 9th, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th,
POSTECH scientists develop breakthrough technique to easily optimize electrical properties of Polyaniline nanosheets to an unprecedented level in an environmental-friendly and inexpensive way July 7th,
2015discoveries Scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015graphene gets competition: Layered semiconducting black arsenic phosphorus as an alternative to silicon July 9th, 2015depletion and enrichment of chlorine in perovskites observed July 9th,
2015human color vision gives people the ability to see nanoscale differences July 9th, 2015announcements Scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th,
2015renishaw adds Raman analysis to Scanning Electron microscopy at the University of Sydney, Australia July 9th, 2015nanocomposites Improve Tire Properties July 9th,
2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th,
Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015photonics/Optics/Lasers Human color vision gives people the ability to see nanoscale differences July 9th
, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th, 2015surfing a wake of light: Researchers observe and control light wakes for the first time July 6th,
2015research partnerships Tunneling out of the surface July 9th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th,
The wavelength of the infrared photon directed at a molecule is around 6 microns (6, 000 nanometres),
while the target measures only a few nanometres. It is very challenging to detect the vibration of such a small molecule in reflected light.
and"hearing"the vibration of a nanometric molecule that is attached to it. In this study, researchers first pattern nanostructures on the graphene surface by bombarding it with electron beams and etching it with oxygen ions.
When the light arrives, the electrons in graphene nanostructures begin to oscillate. This phenomenon concentrates light into tiny spots,
which are comparable with the dimensions of the target molecules. It is then possible to detect nanometric compounds in proximity to the surface.
From ICFO, focussing on future industrial applications of this new sensor Prof. Valerio Pruneri commented that"the concept can be used in different application fields,
Reconfiguring graphene in real time to see the molecule's structurein addition to identifying the presence of nanometric molecules,
'34-935-542-246copyright ICFO-The Institute of Photonic Sciencesissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Layered semiconducting black arsenic phosphorus as an alternative to silicon July 9th, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th, 2015down to the quantum dot:
2015scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015super graphene helps boost chemotherapy treatment: Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015materials/Metamaterials Super graphene can help treat cancer July 10th,
2015scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015super graphene helps boost chemotherapy treatment: Replacing silver coating on catheters with graphene increases treatment effect July 9th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th, 2015announcements Women in Graphene network launched July 10th,
2015super graphene can help treat cancer July 10th, 2015graphene-based film can be used for efficient cooling of electronics July 10th,
2015scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Super graphene can help treat cancer July 10th,
2015scientists Apply Magnetic nanoparticles to Eliminate Cancerous Cells July 10th, 2015graphene gets competition: Layered semiconducting black arsenic phosphorus as an alternative to silicon July 9th,
2015groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015engineering the worlds smallest nanocrystal July 2nd,
2015research partnerships Graphene-based film can be used for efficient cooling of electronics July 10th, 2015tunneling out of the surface July 9th, 2015industrial Scale Production of Functionalised Graphitic Carbon nanomaterials July 9th,
#Researchers find nanowires have pronounced unusually'anelastic'properties Anelastic materials exhibit gradual full recovery of deformation once a load is removed, leading to efficient dissipation of internal mechanical energy.
and p-doped Si nanowires (NWS) can exhibit anelastic behaviour that is up to four orders of magnitude larger than the largest anelasticity observed in bulk materials, with a recovery time-scale in the order
Researchers from North carolina State university and Brown University have found that nanoscale wires (nanowires) made of common semiconductor materials have pronounced a anelasticity-meaning that the wires,
"Because nanowires are so small, the anelasticity is significant and easily observed --although it was a total surprise
when we first discovered the anelasticity in nanowires.""The anelasticity was discovered when Zhu and his students were studying the buckling behavior of nanowires."
"Anelasticity is a fundamental mechanical property of nanowires, and we need to understand these sort of mechanical behaviors
if we want to incorporate nanowires into electronics or other devices,"says Elizabeth Dickey, a professor of materials science and engineering at NC State and co-author of the paper.
Nanowires hold promise for use in a variety of applications, including flexible, stretchable and wearable electronic devices.
The researchers worked with both zinc oxide and silicon nanowires, and found that -when bent-the nanowires would return more than 80 percent of the way to their original shape instantaneously,
but return the rest of the way (up to 20 percent) slowly.""In nanowires that are approximately 50 nanometers in diameter,
it can take 20 or 30 minutes for them to recover that last 20 percent of their original shape,
"says Guangming Cheng, a Ph d. student in Zhu's lab and the first author for the paper.
The work was done using tools developed in Zhu's group that enabled the team to conduct experiments on nanowires
but in nanoscale materials there is time for the atoms to also move, or diffuse, from the compressed area to the stretched area in the material.
If you think of the bent nanowire as an arch, the atoms are moving from the inside of the arch to the outside.
"This phenomenon is pronounced in nanowires. For instance, zinc oxide nanowires exhibited anelastic behavior that is up to four orders of magnitude larger than the largest anelasticity observed in bulk materials,
with a recovery time-scale in the order of minutes,"says Huajian Gao, a professor at Brown University and co-corresponding author of the paper.
Detailed modeling by Gao's group indicates that the pronounced anelasticity in nanowires is because it is much easier for atoms to move through nanoscale materials than through bulk materials.
And the atoms don't have to travel as far. In addition nanowires can be bent much further than thicker wires without becoming permanently deformed or breaking."
"A reviewer commented that this is a new important page in the book on mechanics of nanostructures,
which was very flattering to hear,"Zhu says. The team plans to explore whether this pronounced anelasticity is common across nanoscale materials and structures.
They also want to evaluate how this characteristic may affect other properties, such as electrical conductivity and thermal transport.
#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,
a ubiquitous substance found in all plant cells. The findings introduce ideas for better, greener and safer nanotechnology and could lead to enhanced efficiency of antimicrobial products used in agriculture and personal care.
In a study being published in Nature Nanotechnology July 13 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,
effectively kill a broad swath of bacteria, including E coli and other harmful microorganisms. 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,
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