Nano Technology Part 2

China builds world’s largest nano research centre

2 months ago

  • Chinese scientists are building the world’s largest multifunctional research platform for nano-science and nano-technology that could help develop more powerful computers and more intelligent robots. The Vacuum Interconnected Nano-X Research Facility in Suzhou, Jiangsu Province, integrates the state-of-art capabilities of material growth, device fabrication and testing in one ultra-high vacuum environment, said Ding Sunan, deputy director of the project.

http://www.nan.ng/news/china-builds-worlds-largest-nano-research-centre/

Neutrons, simulation analysis of tRNA-nanodiamond combo could transform drug delivery design principles

February 27, 2017

  • The project began when ORNL’s P. Ganesh and Xiang-Qiang Chu of Wayne State University wondered how the water-phobic surfaces of nanoparticles alter the dynamics of biomolecules coated with water, and if it might be something that they could eventually control. They then formed a team including Gurpreet Dhindsa, Hugh O’Neill, Debsindhu Bhowmik and Eugene Mamontov of ORNL and Liang Hong of Shanghai Jiao Tong University in China to observe the motions of hydrogen atoms from the model system, tRNA, in water using SNS’s BASIS neutron backscattering spectrometer, SNS beam line 2.

https://phys.org/news/2017-02-neutrons-simulation-analysis-trna-nanodiamond-combo.html

Atom-scale oxidation mechanism of nanoparticles helps develop anti-corrosion materials

Feb 23, 2017

  • The research group led by Prof. BAO Xinhe from Dalian Institute of Chemical Physics, Chinese Academy of Sciences discovered that oxide nanostructures (NSs) with a diameter below 3 nm could exhibit an oxidation resistance much more superior than larger NSs. By investigating the oxidation mechanism at the atomic level, the team proposed, for the first time, a “dynamic size effect”, that determines the stability of supported nanoparticles. These findings were published in the latest issue of (“Enhanced oxidation resistance of active nanostructures via dynamic size effect”). This study not only brings the atomic understanding of the dynamic remodeling mechanism of nanocatalyst under the atmosphere, but also provides a new interface control for the development of anti-corrosion and anti-oxidation nano-protective coating.

http://www.nanowerk.com/nanotechnology-news/newsid=45942.php

Graphene foam gets big and tough: Rice University’s nanotube-reinforced material can be shaped, is highly conductive

February 13th, 2017

  • Junwei Sha, a visiting graduate student at Rice and a graduate student at Tianjin University, China, is lead author of the paper. Co-authors from Rice are postdoctoral researchers Rodrigo Salvatierra, Pei Dong and Yongsung Ji; graduate students Yilun Li, Tuo Wang, Chenhao Zhang and Jibo Zhang; former postdoctoral researcher Seoung-Ki Lee; Pulickel Ajayan, chair of the Department of Materials Science and NanoEngineering, the Benjamin M. and Mary Greenwood Anderson Professor in Engineering and a professor of chemistry; and Jun Lou, a professor of materials science and nanoengineering. Naiqin Zhao, a professor at Tianjin University and a researcher at the Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, is also a co-author. Tour is the T.T. and W.F. Chao Chair in Chemistry as well as a professor of computer science and of materials science and nanoengineering at Rice.

http://www.nanotech-now.com/news.cgi?story_id=54326

Miniaturized robots can be propelled through biological fluids by an enzymatic reaction or ultrasound

February 13, 2017

  • And there is another new aspect of the nanojet which scientists from the Harbin Institute of Technology in Shenzhen in China also helped to develop: for the first time, all the materials and reaction partners used are fully biocompatible. “Previous chemical drives of this kind were usually based on a metallic catalyst at the surface of which hydrogen peroxide was broken down into hydrogen and oxygen molecules”, says Sanchez. Oxygen bubbles are created in the process, which creates a thrust in the opposite direction. Both the hydrogen peroxide and the gas bubbles would have disadvantages if used in the human body. But this is not the case with the urease-coated version with its water-soluble – and therefore bubble-free – reaction products. “Urease occurs anyway in the human organism”, Sanchez explains.

https://phys.org/news/2017-02-miniaturized-robots-propelled-biological-fluids.html

Turning the world’s smallest screw

Feb 08, 2017

  • Jun Wei from ASTAR’s Singapore Institute of Manufacturing Technology and co-workers from the ASTAR Institute of Materials Research and Engineering, Nanyang Technological University and Nanjing Tech University in China, developed a simpler method that uses etching techniques to convert a straight nanowire into a screw. The team created 10-micrometer silver nanowires, 80 nanometers in diameter and with five sides. The structures were attached to a silicon substrate and then placed into a solution of silver nitride in ethylene glycol at 80 degrees Celsius for 20 minutes. The sample was then rinsed clean and the process repeated five times.

http://www.nanowerk.com/nanotechnology-news/newsid=45780.php

Catch wave power in floating nets

08 February 2017

  • Nature provides three sources of energy for free: sunlight, air and gravity. Solar and wind power are increasingly exploited, gravity less so. Hydraulic power plants harvest energy from flowing rivers. Tidal energy can be gathered along some inlets and coasts. But few places are suitable for dams or barrages, which can also damage the environment. Zhong Lin Wang proposes a radically different way to harvest renewable energy from the ocean using nanogenerator networks.

http://www.nature.com/news/catch-wave-power-in-floating-nets-1.21426#/dream

Study shows that nanoparticles serve as a good tumor deoxygenation agent

January 20, 2017

  • One target therapy in cancer research is to suffocate the tumor. Cells need oxygen to survive so researchers have focused on methods for cutting off the blood supply to the tumor. Very little research has involved the direct removal of oxygen within the tumor. To this end, a group of researchers from the Shanghai Institute of Ceramics, Chinese Academy of Sciences and the East China Normal University have developed a deoxygenation agent using polyvinyl pyrrolidone modified Mg2Si nanoparticles. This agent is pH sensitive, efficiently consumes oxygen, and one of the products of oxygen consumption also forms aggregates that could potentially block blood vessels. Preliminary mouse studies show tumor hypoxia and good biocompatibility. Their work appears in Nature Nanotechnology.

Read more at: https://phys.org/news/2017-01-nanoparticles-good-tumor-deoxygenation-agent.html#jCp

https://phys.org/news/2017-01-nanoparticles-good-tumor-deoxygenation-agent.html

Strength of hair inspires new materials for body armor

Jan 18, 2017

  • In a new study, researchers at the University of California San Diego investigate why hair is incredibly strong and resistant to breaking. The findings could lead to the development of new materials for body armor and help cosmetic manufacturers create better hair care products. “Hair is such a common material with many fascinating properties,” said Bin Wang, a UC San Diego PhD alumna from the Department of Mechanical and Aerospace Engineering and co-author on the paper. Wang is now at the Shenzhen Institutes of Advanced Technology in China continuing research on hair.

http://www.nanowerk.com/nanotechnology-news/newsid=45629.php

Consistent-chirality carbon nanotube tangles with high on-current in transistors

Dec 28, 2016

  • A group of researchers in China have creatively proposed a novel method by entangling an individual decimeter-long CNT with a diameter of 2 nm into a large tangle with high density and consistent chirality. The team, led by professor Fei Wei from Tsinghua University, has published their findings in (“Acoustic-assisted assembly of an individual monochromatic ultralong carbon nanotube for high on-current transistors”).

http://www.nanowerk.com/spotlight/spotid=45476.php

Pioneering Nanotechnology Developed To Capture Energy From People

10 December 2016

  • Experts at the Michigan State University have developed a nanotechnology device that is as thin as film and can turn human motion into energy. This means that a mere finger swipe over a smartphone screen can keep it running indefinitely. Known as biocompatible ferroelectric nanogenerator, or FENG, the technology is discussed in greater detail in Nano Energy. Other contributors to the research included doctoral scholars Wei Li, David Torres, and Tongyu Wang, as well as Chuan Wang, assistant professor of electrical and computer engineering at the MSU.

http://www.techtimes.com/articles/188433/20161210/pioneering-nanotechnology-developed-to-capture-energy-from-people.htm

Carbon nanotube dry adhesive holds in extreme cold, strengthens in extreme heat

Nov 16, 2016

  • Researchers from Case Western Reserve University, Dayton Air Force Research Laboratory and China have developed a new dry adhesive that bonds in extreme temperatures–a quality that could make the product ideal for space exploration and beyond. The research, which builds on earlier development of a single-sided dry adhesive tape based on vertically aligned carbon nanotubes, is published in the journal Nature Communications (“Carbon nanotube dry adhesives with temperature-enhanced adhesion over a large temperature range”). As far as the researchers know, no other dry adhesive is capable of working at such temperature extremes.

http://www.nanowerk.com/nanotechnology-news/newsid=45096.php

Magnetic nanoparticles produced by bacteria could help kill cancer cells

Nov 10, 2016

  • In new work, published in Biomaterials (“Bacterial magnetic nanoparticles for photothermal therapy of cancer under the guidance of MRI”), a team of Chinese scientists have, for the first time, used naturally occurring bacterial magnetic nanoparticles (BMPs) – magnetosome extracted from magnetotactic bacteria – to substitute man-made nanoparticles for photothermal cancer therapy.

http://www.nanowerk.com/spotlight/spotid=45029.php

Full-color 3D meta-holography with a single nanostructured layer

Nov 09, 2016

  • Holography is an important branch of optics which designs and reconstructs electromagnetic waves with the whole information of light, i.e., phase and amplitude. This technique enables a light field – the product of laser light scattered off objects – to be recorded and later reconstructed when the original light field is no longer present, due to the absence of the original objects. Holography can be thought of as somewhat similar to sound recording, whereby a sound field created by vibrating matter like musical instruments or vocal cords, is encoded in such a way that it can be reproduced later, without the presence of the original vibrating matter. A research team, led by Prof. Xiangang Luo from the State Key Laboratory of Optical Technologies on Nano-fabrication and Micro-engineering (SKLOTNM), Institute of Optics and Electronics, Chinese Academy of Sciences, and Prof. Minghui Hong’s team from Department of Electrical and Computer Engineering, National University of Singapore, have now demonstrated that full-color 3D meta-holography imaging with extended viewing angles can be realized by a single layer of nanostructured metallic surface.

http://www.nanowerk.com/spotlight/spotid=45011.php

Nanorobot may aid fight against cancer

2016-10-25

  • A research team from the University of Hong Kong has developed the world’s first light-guided nanorobot, a submicroscopic device with the potential to travel through the bloodstream, curing sickness. Some experts say nanorobots as key components in scientific efforts to heal medical conditions.

http://usa.chinadaily.com.cn/china/2016-10/25/content_27162698.htm

Self-healable battery Lithium ion battery for electronic textiles grows back together after breaking

October 20th, 2016

  • A team led by Yonggang Wang and Huisheng Peng has now developed a new family of lithium ion batteries that can overcome such accidents thanks to their amazing self-healing powers. In order for a complicated object like a battery to be made self-healing, all of its individual components must also be self-healing. The scientists from Fudan University (Shanghai, China), the Samsung Advanced Institute of Technology (South Korea), and the Samsung R&D Institute China, have now been able to accomplish this.

http://www.nanotech-now.com/news.cgi?story_id=54046

Nano-spike catalysts convert carbon dioxide directly into ethanol

October 12, 2016

  • In a new twist to waste-to-fuel technology, scientists at the Department of Energy’s Oak Ridge National Laboratory have developed an electrochemical process that uses tiny spikes of carbon and copper to turn carbon dioxide, a greenhouse gas, into ethanol. Their finding, which involves nanofabrication and catalysis science, was serendipitous. ORNL’s Yang Song, Rui Peng, Dale Hensley, Peter Bonnesen, Liangbo Liang, Zili Wu, Harry Meyer III, Miaofang Chi, Cheng Ma, Bobby Sumpter and Adam Rondinone are coauthors on the study, which is published as “High-Selectivity Electrochemical Conversion of CO2 to Ethanol using a Copper Nanoparticle/N-Doped Graphene Electrode.”

http://phys.org/news/2016-10-nano-spike-catalysts-carbon-dioxide-ethanol.html

Silkworms fed carbon nanotubes or graphene produce stronger silk

October 11, 2016

  • A team of researchers at Tsinghua University in China has found that adding graphene or carbon nanotubes to the food eaten by silkworms causes them to produce silk that is stronger than normal. In their paper published in Nanoletters, the team describes the approach they took and what was revealed when they tested the new kind of silk.

http://phys.org/news/2016-10-silkworms-fed-carbon-nanotubes-graphene.html

Detailed molecular structure of silver nanocrystals determined

September 21, 2016

  • Structural chemist and chemical crystallographer Dr Alison Edwards has contributed to the characterisation of two large, complex silver nanoclusters of 136 and 374 atoms as part of an international collaboration led by researchers from Xiamen University in China. In research published in Nature Communications, the Chinese collaborators led by Xiamen University Professor of Chemistry, Nanfeng Zheng, synthesised the new molecules, took physical measurements, carried out the X-ray diffraction and electron microscopy and solved and refined models for the crystal structures.

http://phys.org/news/2016-09-molecular-silver-nanocrystals.html

Levitating nanoparticle improves ‘torque sensing’, might bring new research into fundamentals of quantum theory

Sep 16, 2016

  • Researchers have levitated a tiny nanodiamond particle with a laser in a vacuum chamber, using the technique for the first time to detect and measure its “torsional vibration,” an advance that could bring new types of sensors and studies in quantum mechanics. The paper was authored by Purdue postdoctoral research associate Thai M. Hoang; student Yue Ma from Tsinghua University in China; Purdue graduate students Jonghoon Ahn and Jaehoon Bang; Francis Robicheaux, a Purdue professor of physics and astronomy; Zhang-Qi Yin, an assistant research fellow at Tsinghua University; and Li.

http://www.nanowerk.com/nanotechnology-news/newsid=44557.php

Tiny robot ‘nano-fish’ may one day deliver drugs inside the body

September 12, 2016

  • A combined team of researchers from the Harbin Institute of Technology in China and the University of California in the U.S. has developed a nano-sized, remotely controlled fish that is able to swim in liquids when a magnetic field is applied. The team has published the details of their research in the journal Nano Small Micro.

http://phys.org/news/2016-09-tiny-robot-fish-day-drugs.html

Researchers synthesize record-breaking, atomically precise diamond-shaped nanoclusters of silver

Sep 09, 2016

  • A wide international collaboration involving researchers from four countries – China, Australia, Germany and Finland – have managed to synthesize and characterize two previously unknown, record-large silver nanoclusters of 136 and 374 silver atoms. These diamond-shaped nanoclusters (see Figure), consisting of a silver core of 2 to 3 nanometers and a protecting layer of silver atoms and organic thiol molecules, are the largest ones whose structure is now known to atomic precision. The research was published in Nature Communications on 9 September 2016

http://www.nanowerk.com/nanotechnology-news/newsid=44494.php

Nano-lipid particles from edible ginger could improve drug delivery for colon cancer

Sep 06, 2016

  • Edible ginger-derived nano-lipids created from a specific population of ginger nanoparticles show promise for effectively targeting and delivering chemotherapeutic drugs used to treat colon cancer, according to a study by researchers at the Institute for Biomedical Sciences at Georgia State University, the Atlanta Veterans Affairs Medical Center and Wenzhou Medical University and Southwest University in China.

http://www.nanowerk.com/nanotechnology-news/newsid=44454.php

Novel nanotechnology processing capable of producing nanomaterials on an industrial scale

Aug 16, 2016

  • Researchers at Illinois Tech recently unveiled a major breakthrough in nanotechnology processing that reduces the time, and increases the amount of product that can be manufactured on an industrial scale. The new technique makes nanotechnology economically viable for numerous applications, including pollution control for vehicles, reduction in waste heat from vehicles and electronics, and removal of toxic waste from water. Nash, working with graduate students Yang Zhou and Tian Liu of Armour College of Engineering’s Department of Mechanical, Materials, and Aerospace Engineering, detailed his findings in a paper he co-authored with colleagues from Tianjin University, China on the large-scale synthesis of nanostructured plates.

http://www.nanowerk.com/nanotechnology-news/newsid=44237.php

Seeing the invisible: Visible light superlens made from nanobeads: New solid 3-D superlenses extends magnification x5 to reveal new detail

August 12th, 2016

  • Led by Dr Zengbo Wang at Bangor University, UK and Prof Limin Wu at Fudan University, China, the team created minute droplet-like lens structures on the surface to be examined. These act as an additional lens to magnify the surface features previously invisible to a normal lens. Made of millions of nanobeads, the spheres break up the light beam. Each bead refracts the light, acting as individual torch-like minute beam. It is the very small size of each beam of light which illuminate the surface, extending the resolving ability of the microscope to record-breaking levels. The new superlens adds 5x magnification on top of existing microscopes.

http://www.nanotech-now.com/news.cgi?story_id=53816

Picoscale precision though ultrathin film piezoelectricity

August 10, 2016

  • Recently, however, researchers at Nanyang Technological University, Singapore, Chinese Academy of Sciences, Suzhou, and Duke University, Durham demonstrated vertical piezoelectricity at the atomic scale (three to five space lattices) using ultrathin cadmium sulfide (CdS) films. The researchers determined a vertical piezoelectric coefficient (d33) three times that of bulk CdS using in situ scanning Kelvin force microscopy and single and dual ac resonance tracking piezoelectric force microscopy, leading them to conclude that their findings have a number of critical roles in the design of next-generation sensors and microelectromechanical devices.

http://phys.org/news/2016-08-picoscale-precision-ultrathin-piezoelectricity.html

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