Biodegradable Polymer Coating for Implants


February 2017 Newsletter

Karlsruher Institute for Technology

Biodegradable Polymer Coating for Implants


From Karlsruher Institute for Technology (Germany), December 15, 2016: “Medical implants often carry surface substrates that release active substances or to which biomolecules or cells can adhere better. However, degradable gas-phase coatings for degradable implants, such as surgical suture materials or scaffolds for tissue culturing, have been lacking so far. Scientists of Karlsruhe Institute of Technology (KIT, Eggenstein-Leopoldsshafen, Germany), University of Michigan (Ann Arbor, US), and Northwestern Polytechnical University (Xi’an, China) for the first time synthesized a CVD polymer with a degradable backbone. Via special side groups, biomolecules or active substances can be attached. The degradation rate depends on the ratio of both monomer types and on the side groups of the monomers. This opens up new potentials for coating biodegradable implants."


Source:
Karlsruher Institute for Technology 
Image: Karlsruher Institute for Technology


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Nanowerk News

Giving Friction the Slip with Diamond-Like Carbon Films


From Nanowerk News, December 5, 2016: “Argonne National Laboratory scientists discovered new coatings for engine parts with exceptional anti-wear properties. Advanced computational simulations, performed in part at Argonne’s Center for Nanoscale Materials, traced the origin of the anti-wear properties to new catalytic phenomena possible only under the extreme conditions afforded by friction. New catalytically active coatings eliminate the need for environmentally hazardous anti-wear additives used commonly in lubricating oils for engines. Furthermore, they allow the combination of fluid and solid tribofilms to be continually renewed during operation. Tests have revealed new tribofilms containing diamond-like carbon reduce friction by 25 to 40 percent and that wear is reduced to nearly zero. But it took theoretical insight enhanced by massive computing resources to fully understand what was happening."


Source: Nanowerk News
Image: Nanowerk News


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Institute of Basic Science (Korea)

The Thinnest Photodetector in the World


From the Institute of Basic Science (Korea), November 9, 2016, by Letizia Diamante: “The Center for Integrated Nanostructure Physics, within the Institute for Basic Science (IBS) has developed the world's thinnest photodetector. With a thickness of just 1.3 nanometers - 10 times smaller than the current standard silicon diodes - this device could be used in the Internet of Things, smart devices, wearable electronics and photoelectronics. IBS scientists sandwiched a layer of the 2D semiconductor MoS2 between two graphene sheets and put it over a silicon base. They initially thought the resulting device was too thin to generate an electric current but, unexpectedly, it did."


Source: Institute of Basic Science 
Image: Institute of Basic Science


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Advanced Science News

Nanotechnology Solution to Wood Flammability


From Advanced Science News, November 18, 2016, by Gemma Smith: "In a new study researchers from China and Singapore present a new high performance, fire-resistant coating composed of hexagonal boron nitride nanosheets. Current fire resistant coatings, in addition to their undesirable compounds, also require additional binding materials to attach to the surface of the wood, reducing their mechanical stability and lifetime, a problem not encountered by the nanosheets. In the new research h-Bn nanosheets were attached to a substrate of cedar wood and then tested by applying heat with a lighter. Oxidation resistance experiments were also carried out using a chemical vapor deposition furnace system, which showed the coating to be effective at resisting heat up to 900 °C."


Source: Advanced Science News
Image: Advanced Science News


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Daegu Gyeongbuk Institute of Science and Technology (Republic of Korea)

Dressing a Metal in Various Colors


From Daegu Gyeongbuk Institute of Science and Technology (Republic of Korea), January 17, 2017: "A research team at Daegu Gyeongbuk Institute of Science and Technology (DGIST) has succeeded in changing the unique color of metals such as gold, silver, aluminum, with strong thin-film interference effect caused by light reflected on the surface of the metals and semiconducting materials by coating an ultra-thin layer of several nanometers of semiconductor substances on the metals. The research team coated a thin germanium film of 5 to 25 nanometers on a gold substrate by utilizing oblique angle deposition (OAD). As a result, they succeeded in producing various colors such as yellow, orange, blue, and purple at will according to the thickness and deposition angle of the germanium coating."


Source: Daegu Gyeongbuk Institute of Science and Technology
Image: Daegu Gyeongbuk Institute of Science and Technology


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University of Manchester (U.K.)

New Ultra-Thin Semiconductor Could Extend Life of Moore's Law


From the University of Manchester (U.K.), November 21, 2016: "Following a decade of intensive research into graphene and two-dimensional materials a new semiconductor material shows potential for the future of super-fast electronics. The new research from the University of Manchester and their colleagues at the University of Nottingham shows that InSe crystals can be made only a few atoms thick, nearly as thin as graphene. InSe was shown to have electronic quality higher than that of silicon which is ubiquitously used in modern electronics. Being so thin, InSe is rapidly damaged by oxygen and moisture present in the atmosphere. To avoid such damage, the devices were prepared in an argon atmosphere."


Source: University of Manchester
Image: University of Manchester


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Leiden University (the Netherlands)

Making Flawless Graphene Coatings


From the Leiden University (the Netherlands), November 28, 2016: "Dirk van Baarle at the University of Leiden studied how graphene grows at atomic scale and what determines the friction with other materials. Graphene occurs spontaneously when a very clean surface of iridium comes into contact with ethylene (C2H4 ) at a temperature of around 700 degrees Celsius. A remarkable finding is that atomic processes occur not only in the growing layer of graphene. In practice, the surface of the iridium does not match the atomic layers in the substrate perfectly. The iridium forms broad steps on the surface, where the graphene grows over it. But these steps can continue to grow underneath the graphene or can withdraw as a result of the iridium atoms in the substrate realigning themselves."


Source: Leiden University
Image: Leiden University


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NASA Tech Briefs

Diamond Meta-Surfaces Enable New Laser Applications


From NASA Tech Briefs, November 1, 2016, by Pawel Latawiec, et al.: "Over the last 15 years, breakthroughs in the manufacture and processing of diamond grown by CVD have established diamond as an excellent substrate material for high-power and high-energy optics. Laser induced damage threshold (LIDT) of coated diamond optics is much more dependent on the AR coating materials than on the diamond substrate. This is reflected in the observation that failures of diamond windows in the field, which can be very costly, are almost always related to failure of the thin film coating. Element Six, in collaboration with Harvard University's John A. Paulson School of Engineering and Applied Sciences, has developed an anti-reflective solution that eliminates the thin film coating altogether. The new Diamond PureOptics™ product uses 3D microstructures etched into the window surfaces to achieve anti-reflective properties without introducing inferior non-diamond materials."


Source: NASA Tech Briefs
Image: NASA Tech Briefs


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Institute of Photonic Sciences (Spain)

An Invisible Electrode


From the Institute of Photonic Sciences (Spain), December 19, 2016: "Transparent conductors are one of the key elements of today's electronic and optoelectronic devices. Most of the current technology is based on the use of the ITO as a transparent conducting material. However, even though ITO presents several exceptional properties, such as high transmission and low electrical resistance, it still lacks mechanical flexibility, needs to be processed under high temperatures and is expensive to produce. The Institute of Photonics Sciences (ICFO) researchers have developed a room temperature processed multilayer transparent conductor optimizing the antireflection properties to obtain high optical transmissions and low losses, with large mechanical flexibility properties. Researchers applied an Al doped ZnO overcoat and a TiO2 undercoat layer with precise thicknesses to a highly conductive Ag ultrathin film."


Source: The Institute of Photonic Sciences
Image: The Institute of Photonic Sciences


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Solar Industry Magazine

Trina Solar Sets 22.61% Efficiency Record with Mono PERC Cell


From Solar Industry Magazine, December 19, 2016, by Joseph Bebon: "Module manufacturer Trina Solar Ltd. says its State Key Laboratory of PV Science and Technology of China (SKL PVST) has set a new world conversion efficiency record of 22.61% for a high-efficiency p-type mono-crystalline silicon (c-Si) solar cell. According to the company, the record-breaking solar cell was fabricated on a large-sized boron-doped Cz-Si substrate with an industrial process of advanced passivated emitter and rear cell (PERC) technology that integrates back surface passivation, front surface advanced passivation and anti-light-induced-degradation technologies. The 243.23 cm2 solar cell reached a total area efficiency of 22.61%, and the Fraunhofer ISE CalLab (Calibration Lab) in Germany has independently confirmed the result. Also, Trina Solar shareholders recently approved the manufacturer's plan to become a private company."


Source: Solar Industry Magazine
Image: Solar Industry Magazine


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IEEE Spectrum

Fold-Up Smartphone Screens Could Finally Make Their Big Debut


From IEEE Spectrum, December 30, 2016, by Amy Nordrum: "In 2017, Samsung will likely release a smartphone that transforms into a tablet. Samsung has pursued flexible designs for at least four years, going so far as to develop "artificial muscles" that push and pull a smartphone's components into new positions to prevent damage as it bends. Now, according to media reports, the company may finally be ready to share those technologies with the world and save users the hassle of carrying both a phone and a tablet. Competitors are thinking along similar elastic lines. At a trade show last summer, Lenovo showed off a concept product for a smartphone that folded around a user's wrist into a wearable device. Throughout 2016, a Chinese manufacturer named Moxi Group promised a limited release of its own high-end flexible smartphone. But Samsung would be the first of any major company to debut a device with a truly flexible screen."


Source: IEEE Spectrum
Image: IEEE Spectrum


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SVC Membership

SVC Membership Offers Many Benefits


Join or renew your membership for 2017 now and enjoy the benefits of membership for the entire calendar year. Members enjoy free access to the SVC Digital Library and special discounts for many SVC products and services.


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TechCon Tutorial Course Offerings

Choose from TechCon Tutorial Course Offerings for Every Skill Level


The TechCon Tutorial Program increases attendees' practical knowledge of vacuum coatings and processes. Return to work with solutions to everyday vacuum coating troubles and breathe new life into your technical career.


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NCCAVS 38th Annual Equipment Exhibition

NCCAVS 38th Annual Equipment Exhibition


February 23, 2017
Holiday Inn San Jose Airport
1350 N. First Street
San Jose, Calif.


Held In conjunction with:


  • 6th Annual Student Poster Session 
  • NCCAVS Symposium/Joint User Group Meeting


For Attendee Registration, click here. For Exhibitor Registration, click here.

NCCAVS 38th Annual Equipment Exhibition

FCSE 2017 8th Symposium on Functional Coatings and Surface Engineering



June 4-7, 2017
University of Montreal
Quebec, Canada

Abstract Submission Deadline: February 17, 2017

 

Organized by: Quebec Consortium of Advanced Materials - RQMP, and St. Lawrence Chapter of the AVS Science and Technology of Materials, Interfaces; in collaboration with the Society of Vacuum Coaters, and hosted by Polytechnique Montréal and Université de Montréal.

 

Program and Schedule:

Full-Day Short Courses: June 4, 2017, Polytechnique Montreal - Main Building
Materials Science - with J.E. Greene
Plasma Processing of Materials - with A. Anders

 

Symposium Technical Program: June 5 - June 6, 2017, Pavillon Jean-Coutu
Invited lectures and contributed oral presentations, poster presentations, best poster awards, table-top exhibit by manufacturers and vendors, research facility visit, symposium reception and social networking.

 

Full-Day Hands-on Workshops: June 7, 2017:

  • Mechanical Properties of Films and Coatings 
  • Optical Characterization and Reverse Engineering - Spectroscopic Ellipsometry
  • Tribological Properties of Surface Engineered Materials


Click here for more information and to submit an abstract. 

 


SVConnections Contributing Editors:
Carl M. Lampert, SVC Technical Director
Joyce Lampert


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