A new transparent, bioinspired coating makes ordinary glass tough, self-cleaning and incredibly slippery, a team from Harvard University reported online July 31 in Nature Communications.The new coating could be used to create durable, scratch-resistant lenses for eyeglasses, self-cleaning windows, improved solar panels and new medical diagnostic devices, said principal investigator Joanna Aizenberg, who is the Amy Smith Berylson Professor of Materials Science at the Harvard School of Engineering and Applied Sciences (SEAS), a core faculty member at the Wyss Institute for Biologically Inspired Engineering, and professor of chemistry and chemical biology.The new coating builds on an award-winning technology that Aizenberg and her team pioneered called Slippery Liquid-Infused Porous Surfaces (SLIPS)—the slipperiest synthetic surface known. The new coating is equally slippery, but more durable and fully transparent. Together these advances solve longstanding challenges in creating commercially useful materials that repel almost everything.The tiny, tightly packed cells of the honeycomb structure, shown here in this electron micrograph, make the SLIPS coating highly durable.SLIPS was inspired by the slick strategy of the carnivorous pitcher plant, which lures insects onto the ultraslippery surface of its leaves, where they slide to their doom. SLIPS’ thin layer of liquid lubricant allows liquids to flow easily over the surface, much as a thin layer of water on an ice rink helps an ice skater glide. (See video.) Unlike earlier water-repelling materials, SLIPS repels oil and sticky liquids like honey, and it resists ice formation and bacterial biofilms as well.Aizenberg and her colleagues sought to develop a coating that accomplishes this, but extends those capabilities further. The new SLIPS design surpasses existing coatings, which can be quite robust but not slippery or transparent, or, alternatively, transparent but not mechanically stable or repellent enough, Aizenberg said.“The SLIPS-like coating is mechanically stable and has a long-lasting performance as a slippery surface because it’s composed of a sturdy honeycomb-like structure that holds lubricant in tiny, container-like pits,” said lead author Nicolas Vogel, a postdoctoral fellow in applied physics at SEAS.To create this coating, the researchers corral a collection of tiny spherical particles of polystyrene, the main ingredient of Styrofoam, on a flat glass surface like a collection of Ping-Pong balls. They pour liquid glass on them until the balls are more than half buried in glass. After the glass solidifies, they burn away the beads, leaving a network of craters that resembles a honeycomb. They then coat that honeycomb with the same liquid lubricant used in SLIPS.Applying the SLIPS-like coating to glass slides confers unmatched mechanical robustness. Slides treated this way withstood damage and remained slippery after various treatments that can scratch and compromise ordinary glass surfaces and other popular liquid-repellent materials, including touching, peeling off a piece of tape, and wiping with a tissue.These glass slides with the SLIPS coating also repelled a variety of liquids, just as SLIPS does, including water, octane, wine, olive oil and ketchup. And, like SLIPS, the coating reduced the adhesion of ice to a glass slide by 99 percent. Keeping materials frost-free is important because adhered ice can take down power lines, decrease the energy efficiency of cooling systems, delay airplanes, and lead buildings to collapse.By adjusting the width of the honeycomb cells to make them much smaller in diameter than the wavelength of visible light, the researchers made the coating completely transparent.The researchers were also able to apply the SLIPS-like coating to glass slides in a pattern that confines liquid to specific areas—an ability that’s important for various lab-on-a-chip applications and medical diagnostics.“We set ourselves a challenging goal: to design a versatile coating that’s as good as SLIPS but much easier to apply, transparent, and much tougher—and that is what we managed,” Aizenberg said.The team is now honing its method to better coat curved pieces of glass as well as clear plastics such as Plexiglas, and to adapt the method for the rigors of manufacturing.“Joanna’s new SLIPS coating reveals the power of following nature’s lead in developing new technologies,” said Donald E. Ingber, founding director of the Wyss Institute, Professor of Bioengineering at SEAS, and Judah Folkman Professor of Vascular Biology at Harvard Medical School and Boston Children’s Hospital. “We are excited about the range of applications that could use this innovative coating.”This work was funded by the Advanced Research Projects Agency—Energy (ARPA-E), the Air Force Office of Scientific Research, and the Wyss Institute. Nicolas Vogel received funding from the Leopoldina Fellowship program. In addition to Vogel and Aizenberg, the research team included: Rebecca A. Belisle, a former Wyss research assistant who is now a graduate student in materials science and engineering at Stanford University; Benjamin Hatton, formerly a research appointee at SEAS and a technology development fellow at the Wyss Institute who is now an assistant professor of materials science and engineering at the University of Toronto; and Tak-Sing Wong, a former postdoctoral research fellow at the Wyss Institute who is now an assistant professor of mechanical and nuclear engineering at Penn State University.
Arsenal striker Pierre-Emerick Aubameyang With 22 league goals to his credit so far this term, Vardy is in pole position to take the prize, especially after rediscovering his peak form over the last week. Vardy failed to score in Leicester’s first four games after the coronavirus hiatus, but the 33-year-old netted twice against Crystal Palace to pass 100 Premier League goals and struck again at Arsenal. “He’s a legend here for the rest of his time at the club, it’s just what he adds to that status over the rest of his career,” Leicester boss Brendan Rodgers said after Vardy became the 29th player to join the Premier League 100-goal club. Winning the Golden Boot would be another landmark moment for Vardy, who has defied the odds throughout his remarkable rise from non-league journeyman to Premier League champion four years ago. Vardy’s next opportunity to increase his grip on top spot comes against lowly Bournemouth on Sunday. Pierre-Emerick Aubameyang Leicester striker Jamie Vardy Loading… Sunday’s north London derby at Tottenham and a home game against Liverpool in their following game give Aubameyang a chance to put pressure on Vardy when the spotlight is brightest. Mohamed Salah Having won the Golden Boot in 2018 and finished in joint first place last year, the Liverpool forward needs a late goal spree to make it three successive seasons on top of the leaderboard. Salah’s brace in a 3-1 win at Brighton on Wednesday took him to 19 goals and, with Liverpool chasing a new Premier League points record, the Egyptian is likely to remain in the team even with the title won. With nine assists this season, compared to four for Vardy, two for Aubameyang and two for Ings, the 28-year-old all round value to Liverpool is arguably higher than any of his Golden Boot rivals. Next up for Liverpool is Saturday’s clash with Burnley followed by games against Arsenal, Chelsea and Newcastle to round off a memorable campaign that could finish on a high for Salah on a personal note as well. Danny Ings Liverpool forward Mohamed Salah Southampton striker Danny Ings While the Premier League title has already been won by Liverpool in record time, the battle to finish as the top-flight’s leading scorer is set to go down to the wire. Liverpool’s Mohamed Salah could add the Golden Boot to his Premier League winners’ medal, but he has work to do to catch Leicester’s Jamie Vardy, who sits top of the goal charts with four games left. Arsenal’s Pierre-Emerick Aubameyang is also in contention to get his hands on the prize after sharing it with Salah and Sadio Mane last season when the trio each scored 22 goals. Southampton’s Danny Ings is the dark horse after an unexpectedly prolific campaign. Jamie Vardy Promoted ContentCan Playing Too Many Video Games Hurt Your Body?7 Breathtaking Train Stations Around The GlobeWhat Is A Black Hole And Is It Dangerous For Us All?Best & Worst Celebrity Endorsed Games Ever Made6 Movies Where A Car Plays A Key Role8 Ways Drones Will Automate Our Future5 Of The World’s Most Unique Theme ParksThe Very Last Bitcoin Will Be Mined Around 2140. Read More8 Facts About Sasha Obama7 Black Hole Facts That Will Change Your View Of The Universe8 Things You Didn’t Know About CoffeeWho Is The Most Powerful Woman On Earth? Read Also: Premier League: Man Utd break record for most penalties in a season Ahead of Monday’s trip to Manchester United, Ings’ four goals in his last five matches have underlined the former Liverpool forward’s case for a possible England call-up when international football resumes. First, Ings will focus on becoming the first Golden Boot winner to play for a club outside the Premier League’s ‘big six’ since Sunderland’s Kevin Phillips in 1999-2000. FacebookTwitterWhatsAppEmail分享 The Southampton striker bagged his 19th goal of the season in Thursday’s 1-1 draw at Everton. After a blistering run during the winter, the goals had dried up a little for Ings, but the 27-year-old has been back in predatory form since the restart. The Arsenal forward has scored three times in his last three appearances to move into second place in the goal race. Aubameyang has netted 20 times this season, his prolific form increased Arsenal’s desire to get the Gabon international to extend a contract that expires at the end of next season. The 31-year-old is yet to agree a new deal amid reported interest from Barcelona and Paris Saint Germain. His value to Arsenal comes not just in his goals but in his ability to play wide on the left as well as up front.
Tottenham have denied they are in discussions regarding a reported £1billion takeover, but it remains unclear where the club will call home for the 2017/18 season. Press Association The new stadium, a 56,250-seat venue, has been hit with a legal wrangling which now means it will not be ready to host Spurs from 2017 onwards – as the club confirmed on Thursday they are likely to be forced to spend a season in a different ground. Wembley, the Olympic Stadium and stadium:mk have all been touted as potential venues, with the Tottenham Hotspur Supporters’ Trust expressing fears the club’s identity risks being severely damaged if the wrong groundshare option is taken for the 2017/18 campaign. “The board of the Tottenham Hotspur Supporters’ Trust is understandably concerned to hear the latest announcement from the club regarding delays to the building of a new stadium,” a THST statement read. “While we cannot, for obvious reasons, comment on the details of the legal process around the High Court appeal, we find it surprising that negotiations between the club and one business have continued for seven years without resolution.” Although accepting that a move may be beyond anyone’s control, THST also laid out issues it worries could risk longer-reaching changes to its club. “While the Trust is pragmatic about the need to move from White Hart Lane for one season, the prospect of moving from north London raises a number of issues for supporters, the local community, and the club’s identity,” the statement added. “For the supporters, there are serious issues over the logistics and expense of travel to home games. For the local community, which is depending upon the stadium project as a catalyst for regeneration, there are serious economic implications. We believe the cost of such a move to the local economy needs to be seriously considered. “Moving away from the area threatens serious damage to the identity of a club which has always played in north London. We would like greater transparency as to why the option of playing at White Hart Lane, the option which would benefit N17 the most, is apparently now no longer available. “Our greatest concern is that, once the club moves for one season, it is but a short step towards moving for two seasons, or more. “When the club’s current board tried to move us to Stratford, Tottenham Hotspur supporters showed their fierce opposition and we would urge the club to learn the lessons from that episode. A football club divorces itself from its community and identity at its peril.” Wembley has been identified by THST as a favoured solution, but Tottenham head coach Mauricio Pochettino conceded a move 50 miles away to Milton Keynes remains a possibility. “Every single decision the club makes is to improve and give better facilities to our supporters, so I back this decision,” he said. “Yes, I was in Milton Keynes to watch the game with Manchester United in the Capital One Cup. It was the first time I had been there. “It is a very good stadium with very good facilities but nothing more – it’s a possibility. “We need to speak a lot about this decision because we need all the information about the club, the supporters and the team. But at the moment we are not talking about this.” On a busy day for the north London club, they also announced that a dditional funding is being sought for the stadium venture, with Rothschild appointed as financial advisors. “The stadium redevelopment plans are a significant part of the future for both our club and the local area and represent a complex infrastructure project that requires funding,” the Spurs statement added. “This substantial construction project requires discussions with multiple providers of finance so that the optimum financing package can be achieved. To this end, we have appointed Rothschild to advise us on those options. “Accordingly, we are at a stage where we are starting to engage with a number of financing institutions and potential funders in respect of the new stadium development project.” It was reported on Thursday morning that the club’s owner Joe Lewis was prepared to sell as Spurs build a new stadium adjacent to their current White Hart Lane home. Tottenham said those suggestions were wide of the mark, with a statement on tottenhamhotspur.com reading: “Contrary to recent press speculation, neither the club, nor its majority shareholder, are in any takeover discussions and the focus of the club is fully on delivering the new stadium project.”
Mark Hughes has said that his “affinity” with Southampton is the reason he agreed to take charge of the Premier League strugglers until the end of the season.The former Stoke boss replaces Mauricio Pellegrino, who was sacked on Monday with the club one point above the relegation zone after one win in 17.“The objective is to make sure we’re a Premier League club next year,” Hughes said. “That’s where we should be.” Hughes was sacked by Stoke in January, with the club in the bottom three.The Welshman, 54, had been with Stoke for four and a half years and has taken charge of 445 Premier League matches for the Potters, Blackburn, Manchester City, Fulham, QPR.He started his managerial career with five years in charge of his country.Hughes spent two years at Southampton from 1998 to 2000 in a 22-year playing career that also included spells at Manchester United, Chelsea and Barcelona.“It’s a challenge I’m excited by. It’s a great opportunity to come back to a club I know well, and a club I’ve got real affinity with, and I couldn’t turn that down,” Hughes said.“I understand what it takes in this league to win games. But it’s about coming in and being that different voice that will enable the players to recognise and focus on what needs to be done.”Hughes’ first game will be Sunday’s FA Cup quarter-final against League One side Wigan.Southampton was beaten 3-0 by Newcastle on Saturday and the next league game is away to fellow strugglers West Ham on March 31.Hughes is the club’s fifth permanent manager in the five years since Mauricio Pochettino, now Spurs manager, replaced Nigel Adkins.Share this:FacebookRedditTwitterPrintPinterestEmailWhatsAppSkypeLinkedInTumblrPocketTelegram