Nanofiber

Nanofiber is a fiber in the nanoscale. They can be manufactured by various processes such as polymerization, electrospinning and electrostatic spinning, and melt processing. Nanofiber can be fabricated from different kind of inorganic substances, such as titanium dioxide, silicon dioxide, zirconium dioxide, aluminum oxide, lithium titanate, titanium nitride or platinum.

Nanofibers are used in many application including nanomedicine, biomedicine, textile manufacturing and modification, filtration systems, water and air purification, energy cells and batteries.

  • A Nano-Roundabout for Light

    Functional principle of a nano-roundabout.  © TU Wien

    At TU Wien, it was possible to create a nanoscale optical element that regulates the flow of light particles at the intersection of two glass fibers like a roundabout. A single atom was used to control the light paths. Just like in normal road traffic, crossings are indispensable in optical signal processing. In order to avoid collisions, a clear traffic rule is required. A new method has now been developed at TU Wien to provide such a rule for light signals. For this purpose, the two glass fibers were coupled at their intersection point to an optical resonator, in which the light circulates and behaves as in a roundabout. The direction of circulation is defined by a single atom coupled to the resonator. The atom also ensures that the light always leaves the roundabout at the next exit. This rule is still valid even if the light consists merely of individual photons. Such a roundabout will consequently be installed in integrated optical chips – an important step for optical signal processing.

  • A signal boost for molecular microscopy

    A signal boost for molecular microscopy | Schematic illustration of the experiment. Graphic: MPQ, Laser Spectroscopy Division

    Cavity-enhanced Raman-scattering reveals information on structure and properties of carbon nanotubes. The inherently weak signals are amplified by using special micro cavities as resonator, giving a general boost to Raman spectroscopy as a whole.

  • A study on thermophoretic Janus particles and capsules used as dyes for infrared laser‐assisted tissue welding.

    A) Production of Janus composite particles by LbL self‐assembly of PEM and magnetite nanoparticles followed by sputter coating with gold and resuspension in water. B) Laser tissue welding with magnetic assistance, due to magnetite particles being homogeneously distributed in the particles the particle orientation is random during welding. © 2016 Wenping He, Johannes Frueh, Narisu Hu, Liping Liu, Meiyu Gai, and Qiang He. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

    Researchers from China and London* recently published a principle study on thermophoretic Janus particles and capsules used as dyes for infrared laser‐assisted tissue welding. The original article “Guidable Thermophoretic Janus Micromotors Containing Gold Nanocolorifiers for Infrared Laser Assisted Tissue Welding” was published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.

  • Engineering heart valves for the many

    In rotary jet spinning technology, a rotating nozzle extrudes a solution of extracellular matrix (ECM) into nanofibers that wrap themselves around heart valve-shaped mandrels. Wyss Institute at Harvard University

    Harvard’s Wyss Institute and the University of Zurich partner to create a next-generation heart valve that accurately functions upon implantation and regenerates into long-lasting heart-like tissue.

    The human heart beats approximately 35 million times every year, effectively pumping blood into the circulation via four different heart valves. Unfortunately, in over four million people each year, these delicate tissues malfunction due to birth defects, age-related deteriorations, and infections causing cardiac valve disease.

  • Hannover Messe: Low Haze Structures for Transparent Flexible Electrodes by Electrospinning Processes

    Electrospinning: thin fibers for flexible, transparent electrodes. Source: Use Bellhäuser

    Flexible, transparent, and conductive electrodes (FTCEs) are a key enabling technology for the new generation of flexible, printable and wearable electronics. The touchscreens and displays of the future will be curved and flexible and integrated into cars, phones, or medical technology. Tapping and wiping can only work on flexible devices, when flexible materials are used for touchscreens and electric circuits, but not brittle materials like indium tin oxide or silicon. For this purpose, INM - Leibniz Institute for New Materials is working with the process of electrospinning, a technique that produces ultra-fine fibers that are up to 100 times thinner than a human hair.

  • Nanoparticle Exposure Can Awaken Dormant Viruses in the Lungs

    Nanoparticles from combustion engines (shown here) can activate viruses that are dormant in in lung tissue.  Source: Helmholtz Zentrum München

    Nanoparticles from combustion engines can activate viruses that are dormant in in lung tissue cells. This is the result of a study by researchers of Helmholtz Zentrum München, a partner in the German Center for Lung Research (DZL), which has now been published in the journal ‘Particle and Fibre Toxicology’.

    To evade the immune system, some viruses hide in cells of their host and persist there. In medical terminology, this state is referred to as a latent infection. If the immune system becomes weakened or if certain conditions change, the viruses become active again, begin to proliferate and destroy the host cell. A team of scientists led by Dr. Tobias Stöger of the Institute of Lung Biology and Prof. Dr. Heiko Adler, deputy head of the research unit Lung Repair and Regeneration at Helmholtz Zentrum München, now report that nanoparticles can also trigger this process.

  • Natural Nanofibres Made of Cellulose

    Through contact with water, the seed of Neopallasia pectinata from the family of composite plants forms a slimy sheath. The white cellulose fibres anchor it to the seed surface. © Kreitschitz

     

    The seeds of some plants such as basil, watercress or plantain form a mucous envelope as soon as they come into contact with water. This cover consists of cellulose in particular, which is an important structural component of the primary cell wall of green plants, and swelling pectins, plant polysaccharides. In order to be able to investigate its physical properties, a research team from the Zoological Institute at Kiel University (CAU) used a special drying method, which gently removes the water from the cellulosic mucous sheath. The team discovered that this method can produce extremely strong nanofibres from natural cellulose. In future, they could be especially interesting for applications in biomedicine. The team’s results recently appeared as the cover story in the journal Applied Materials & Interfaces.

  • NRW Nano-Konferenz in Münster: Ministerin Schulze eröffnet international renommierte Veranstaltung

    Ministerin Svenja Schulze am Stand der Nanobay-NB GmbH

    Führende Rolle des Landes im Bereich der Nanotechnologie – 700 Gästen diskutieren über Chancen, Risiken und Potenziale. Münster steht für zwei Tage (7. und 8. Dezember 2016) ganz im Zeichen der Nanotechnologie: Die international renommierte NRW Nano-Konferenz findet erstmals in der Halle Münsterland statt. Mehr als 700 Gästen treffen sich zum Austausch über Chancen, Risiken und Potenziale der Nanotechnologie. Die Ausrichtung der Konferenz wird künftig im Wechsel zwischen den Standorten Münster und Dortmund stattfinden.
    NRW ist deutschlandweit der führende Standort für Nanotechnologie. Über 500 Akteure aus Wissenschaft und Wirtschaft befassen sich hier mit Nanomaterialien, Nanosicherheit, Nanoanalytik, Nanomedizin, Nanoelektronik, Nanoenergie und organischer Elektronik.

  • When Proteins Shake Hands

    Hybrid protein nanofibers at formation. (Dr Izabela Firkowska-Boden/FSU Jena)

    Materials scientists from Jena (Germany) create innovative nanomaterial from natural substances. Be it in spider silk, wood, the spaces between body cells, in tendons, or as a natural sealant for small wounds: protein fibres are found virtually everywhere in nature. These small protein fibres, also referred to as protein nanofibres by experts, often have outstanding properties such as a high stability, biodegradability, or antibacterial effect.

  • 혁신적 전기방사 기술을 이용한 나노섬유 생산 기술 (New Electro blown spinning process for Nanofiber production)

    전기방사에 의한 나노섬유 제조공법은 각종폴리머를 solvent(용제)에 녹인 후 이를 고전압(± 10KV)을 가해 자기장을 형성후 이 사이에서생기는 전기적 반발력을 이용해 방사되는 고분자용액을 나노급의 섬유로 뽑아내는 기술입니다. 

    Electro spinning is a process that produces a highly impermeable, non-woven nano-fabric of sub-micron fibersby pushing a millimeter diameter liquid jet through a Nozzle with an electric field (fibrillation of fiber).