After electrospinning nanofibrous films, the researchers stacked each of five films in successive, 36-degree angles to form a single bouligand structure, which they then welded and crystallized to fortify the material. In this work, it is reported that PEDOT:PSS thin films on glass substrates, once mixed with surfactants, can be delaminated with hydrogels and thereafter be transferred to soft substrates without any further treatments. 2Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA 3California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA 4Department of Materials Science and Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA They tested the film’s fatigue-resistance by placing it in a machine that stretched it repeatedly over tens of thousands of cycles. The process starts with electrospinning, a fiber production technique that uses electric charges to draw ultrathin threads out of polymer solutions. MIT has been named the top university in the world for “Architecture/Built Environment” in the subject rankings from QS World University Rankings for 2020. They fabricated the material from ultrathin fibers of hydrogel, which aligned like many strands of gathered straw when the material was repeatedly stretched. However, microchannels have rarely been created in commercial hydrogel contact lenses due to their sensitivity to conventional microfabrication techniques. Image courtesy of Jiahua Ni, Shaoting Lin, Xuanhe Zhao, et al. Contact Us. A collaboration between MIT’s Edgerton Center and Roiti High School in Italy is letting kids take their physics education outside the classroom. Ni, Lin, and members of Zhao’s group teamed up with Nelson’s lab and Radovitzky’s group in MIT’s Institute for Soldier Nanotechnologies, and Qin’s lab at Syracuse University, to see if they could reproduce the lobster’s bouligand membrane structure using their synthetic, fatigue-resistant films. Jiahua Ni. He focuses on advising significant outbound financings for major Chinese banks, including export credit finance, project finance, structured finance and general corporate finance, in Asia, Middle East, South America and Africa. If the fabrication process could be significantly scaled up, materials made from nanofibrous hydrogels could be used to make stretchy and strong replacement tissues such as artificial tendons and ligaments. 发布于 2019-10-15. The proposed method allows easy, fast, and reliable transferring of patterned PEDOT:PSS thin films from glass substrates onto various soft substrates, facilitating their application in soft organic bioelectronics. 比较注重感性认识，对基础不是很好的可以先通过此书建立起基本微积分架构，据说是mit数学系的基础教材哦 . Professor Ali Khademhosseini is the CEO of the Terasaki Institute for Biomedical Innovation. “We prepared aligned nanofibers by electrospinning to mimic the chinic fibers existed in the lobster underbelly,” Ni says. This protective membrane is made from thin sheets of chitin, a natural, fibrous material that is similar in makeup to the group’s hydrogel nanofibers. A facile transfer‐printing of conducting polymer thin films from conventional rigid substrates to flexible substrates offers an alternative solution. A credit line must be used when reproducing images; if one is not provided View Jiahua You’s profile on LinkedIn, the world’s largest professional community. One of the original six courses offered when MIT was founded in 1865, MechE's faculty and students conduct research that pushes boundaries and provides creative solutions for the world's problems. Ni, Lin, and members of Zhao's group teamed up with Nelson's lab and Radovitzky's group in MIT's Institute for Soldier Nanotechnologies, and Qin's lab at Syracuse University, to see if they could reproduce the lobster's bouligand membrane structure using their synthetic, fatigue-resistant films. Zhao Lab Massachusetts Institute of Techonology, 77 Massachusetts Avenue Room 1-025 Cambridge, MA 02139-4307 From these tests, they calculated that the nanofibrous films were 50 times more fatigue-resistant than the conventional nanofibrous hydrogels. Stretch tests showed that the lobster-inspired material performed similarly to its natural counterpart, able to stretch repeatedly while resisting tears and cracks — a fatigue-resistance Lin attributes to the structure’s angled architecture. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Ni, Lin, and members of Zhao’s group teamed up with Nelson’s lab and Radovitzky’s group in MIT’s Institute for Soldier Nanotechnologies, and Qin’s lab at Syracuse University, to see if they could reproduce the lobster’s bouligand membrane structure using their synthetic, fatigue-resistant films. Now a separate MIT team has fabricated a hydrogel-based material that mimics the structure of the lobster’s underbelly. Use the link below to share a full-text version of this article with your friends and colleagues. 6 Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA † These authors contributed equally to this work. The two chemical engineers are awarded MIT’s highest faculty honor. and you may need to create a new Wiley Online Library account. Jiahua has 1 job listed on their profile. The membrane’s structure could provide a blueprint for robust artificial tissues. However, directly manipulating conducting polymer thin films on soft substrates remains challenging, which hinders the development of conformable organic bioelectronic devices. 5 globally. The researchers ran the material through a battery of stretch and impact tests, and showed that, similar to the lobster underbelly, the synthetic material is remarkably “fatigue-resistant,” able to withstand repeated stretches and strains without tearing. Microchannels in hydrogels play an essential role in enabling a smart contact lens. The final product measured 9 square centimeters and about 30 to 40 microns thick — about the size of a small piece of Scotch tape. Our Locations 11570 W Olympic Blvd Los Angeles, CA 90064 1018 Westwood Blvd Los Angeles, CA 90024 21100 Erwin St, Los Angeles, California, USA OPENING 2021 It is, however, significantly sturdier than most other nanofibrous hydrogels such as gelatin and synthetic polymers like PVA. MIT's Department of Mechanical Engineering (MechE) offers a world-class education that combines thorough analysis with hands-on discovery. McDowell will head civic design at new center, maintain leadership role at Department of Urban Studies and Planning. “At that moment, we had a feeling nanofibers in hydrogels were important, and hoped to manipulate the fibril structures so that we could optimize fatigue resistance,” says Lin. Kytopen is speeding up both discovery and delivery of engineered cell therapies with its transformative Flowfect platforms. The findings could lead to faster, more secure memory storage, in the form of antiferromagnetic bits. MIT's Department of Mechanical Engineering (MechE) offers a world-class education that combines thorough analysis with hands-on discovery. Visit Chambers and Partners to find out more. keep learning keep moving. See the complete profile on LinkedIn and discover Jiahua’s connections and jobs at similar companies. Jiahua Ni's 36 research works with 471 citations and 7,232 reads, including: Degradable Magnesium Implants Inhibit Gallbladder Cancer Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, I have read and accept the Wiley Online Library Terms and Conditions of Use. The team used high-voltage charges to spin nanofibers from a polymer solution, to form a flat film of nanofibers, each measuring about 800 nanometers — a fraction of the diameter of a human hair. By taking advantage of this method, skin‐attachable tattoo‐OECTs are demonstrated, relevant for conformable, imperceptible, and wearable organic biosensing. George F. Simmons 的微积分与解析几何. Ali Khademhosseini is the Director and CEO of the Terasaki Institute for Biomedical Innovation. Learn more. Working off-campus? This year, MIT ranked No. Jiahua Ni Department of Bioengineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA Center for Minimally Invasive Therapeutics (C‐MIT), University of California‐Los Angeles, Los Angeles, CA, 90095 USA California NanoSystems Institute, University of California‐Los Angeles, Los Angeles, CA, 90095 USA Please check your email for instructions on resetting your password. The team’s results are published today in the journal Matter. “We learned that this bouligand structure in the lobster underbelly has high mechanical performance, which motivated us to see if we could reproduce such structures in synthetic materials,” Lin says. Ich kaufe ALLE Halloween Pets in ROBLOX Adopt Me und trade dann mit meiner Community um zu sehen, ob es noch andere tolle Pets gibt! He was … A lobster’s underbelly is lined with a thin, translucent membrane that is both stretchy and surprisingly tough. The team also subjected the material to microballistic impact tests with an experiment designed by Nelson’s group. Ni, Lin, and members of Zhao’s group teamed up with Nelson’s lab and Radovitzky’s group in MIT’s Institute for Soldier Nanotechnologies, and Qin’s lab at Syracuse University, to see if they could reproduce the lobster’s bouligand membrane structure using their synthetic, fatigue-resistant films. Our lab is located at Converse 123. This marine under-armor, as MIT engineers reported in 2019, is made from the toughest known hydrogel in nature, which also happens to be highly flexible. You may not alter the images provided, other than to crop them to size. This combination of stretch and strength suggests that, if their fabrication can be sped up, and more films stacked in bouligand structures, nanofibrous hydrogels may serve as flexible and tough artificial tissues. This combination of strength and stretch helps shield a lobster as it scrabbles across the seafloor, while also allowing it to flex back and forth to swim. The paper’s MIT co-authors include postdocs Jiahua Ni and Shaoting Lin; graduate students Xinyue Liu and Yuchen Sun; professor of aeronautics and astronautics Raul Radovitzky; professor of chemistry Keith Nelson; mechanical engineering professor Xuanhe Zhao; and former research scientist David Veysset PhD ’16, now at Stanford University; along with Zhao Qin, assistant professor at Syracuse University, and Alex Hsieh of the Army Research Laboratory. Around this time, they read with interest a study by Ming Guo, associate professor of mechanical engineering at MIT, who characterized the mechanical properties of a lobster’s underbelly. Our Locations 11570 W Olympic Blvd Los Angeles, CA 90064 1018 Westwood Blvd Los Angeles, CA 90024 21100 Erwin St, Los Angeles, California, USA OPENING 2021 MIT News | Massachusetts Institute of Technology, Synthetic gelatin-like material mimics lobster underbelly’s stretch and strength. This person is not on ResearchGate, or hasn't claimed this research yet. Formerly, he was Levi Knight Professor of Bioengineering, Chemical Engineering, and Radiology at the University of California-Los Angeles (UCLA). “Our material design could achieve these two properties.”. This website is managed by the MIT News Office, part of the MIT Office of Communications. 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In 2019, Lin and other members of Zhao’s group developed a new kind of fatigue-resistant material made from hydrogel — a gelatin-like class of materials made primarily of water and cross-linked polymers. “That means that a 5-millimeter steel ball launched at 200 meters per second would be arrested by 13 millimeters of the material,” Veysset says. This workout also happened to increase the hydrogel’s fatigue resistance. Praveen Bandaru 1 2 , Dafeng Chu 1 2 , Wujin Sun 1 2 , Soufian Lasli 1 2 , Chuanzhen Zhao 3 , Shuang Hou 4 , Shiming Zhang 1 2 , Jiahua Ni 1 2 , Giorgia Cefaloni 1 2 , Samad Ahadian 1 2 , Mehmet Remzi Dokmeci 2 5 , Shiladitya Sengupta 6 7 , Junmin Lee 1 2 , Ali Khademhosseini 1 2 5 8 The material is also much stretchier than Kevlar. This research was supported, in part, by MIT and the U. S. Army Research Office through the Institute for Soldier Nanotechnologies at MIT. Creative Commons Attribution Non-Commercial No Derivatives license. Zhao Lab Massachusetts Institute of Techonology, 77 Massachusetts Avenue Room 1-025 Cambridge, MA 02139-4307 Guo found that a cross-section of the lobster membrane revealed sheets of chitin stacked at 36-degree angles, similar to twisted plywood, or a spiral staircase. In “Art and Design,” the Institute ranked No. View Jiahua Ni’s profile on LinkedIn, the world’s largest professional community. jiahua ni. The difference in velocity gave them a direct measurement of the material’s impact resistance, or the amount of energy it can absorb, which turned out to be a surprisingly tough 40 kilojoules per kilogram. A lobster’s underbelly is lined with a thin, translucent membrane that is both stretchy and surprisingly tough. Jiahua’s education is listed on their profile. One of the original six courses offered when MIT was founded in 1865, MechE's faculty and students conduct research that pushes boundaries and provides creative solutions for the world's problems. This number is measured in the hydrated state. (The best way to find our lab is to come through the CCB library [Converse 107]) (617)-496-2812 and (617)-496-2307 It’s no surprise that the new material isn’t as tough as commercial antiballistic materials. Ni, Lin, and members of Zhao’s group teamed up with Nelson’s lab and Radovitzky’s group in MIT’s Institute for Soldier Nanotechnologies, and Qin’s lab at Syracuse University, to see if they could reproduce the lobster’s bouligand membrane structure using their synthetic, fatigue-resistant films. “Intuitively, once a crack in the material propagates through one layer, it’s impeded by adjacent layers, where fibers are aligned at different angles,” Lin explains. He is also the Paul Terasaki Distinguished Professor at the Terasaki Institute. Lincoln Laboratory connects counter–human trafficking community in pursuit of technology to help investigate cases. Here, we report the fabrication of … Any queries (other than missing content) should be directed to the corresponding author for the article. Jiahua Ni, Shaoting Lin, Zhao Qin,...,RaulRadovitzky,KeithA. Discover where Jiahua Ni is ranked in the Asia-Pacific guide. In their new study, the researchers combined a number of techniques to create stronger hydrogel nanofibers. Images for download on the MIT News office website are made available to non-commercial entities, press and the general public under a They imaged the material as they shot it with microparticles at high velocity, and measured the particles’ speed before and after tearing through the material. “It is not as resistant as Kevlar, which would require 1 millimeter, but the material beats Kevlar in many other categories.”. The use of conducting polymers such as poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) for the development of soft organic bioelectronic devices, such as organic electrochemical transistors (OECTs), is rapidly increasing. below, credit the images to "MIT.". This rotating, layered configuration, known as a bouligand structure, enhanced the membrane’s properties of stretch and strength. Learn about our remote access options, Department of Bioengineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA, Center for Minimally Invasive Therapeutics (C‐MIT), University of California‐Los Angeles, Los Angeles, CA, 90095 USA, California NanoSystems Institute, University of California‐Los Angeles, Los Angeles, CA, 90095 USA, Department of Mechanical and Aerospace Engineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA, Department of Materials Science and Engineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA, Department of Electrical Engineering and Computer Science, University of Michigan – Ann Arbor, Ann Arbor, MI, 48109 USA, Department of Engineering Physics, Polytechnique Montreal, Montreal, QC, H3C 3A7 Canada, Department of Electrical and Computer Engineering, University of California‐Los Angeles, Los Angeles, CA, USA, Department of Radiology, University of California‐Los Angeles, Los Angeles, CA, 90095 USA, Department of Chemical and Biomolecular Engineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA. If you do not receive an email within 10 minutes, your email address may not be registered, The full text of this article hosted at iucr.org is unavailable due to technical difficulties. They placed the film in a high-humidity chamber to weld the individual fibers into a sturdy, interconnected network, and then set the film in an incubator to crystallize the individual nanofibers at high temperatures, further strengthening the material. Massachusetts Institute of Technology77 Massachusetts Avenue, Cambridge, MA, USA. Jiahua Ni specializes in PRC-related cross-border financings. “For a hydrogel material to be a load-bearing artificial tissue, both strength and deformability are required,” Lin says. Contact Us. They also made notches in some films and observed how the cracks propagated as the films were stretched repeatedly. Ni, Lin, and members of Zhao’s group teamed up with Nelson’s lab and Radovitzky’s group in MIT’s Institute for Soldier Nanotechnologies, and Qin’s lab at Syracuse University, to see if they could reproduce the lobster’s bouligand membrane structure using their synthetic, fatigue-resistant films. * Corresponding authors (emails: jiahuani@mit.edu (Ni J); nanosurface@sjtu.edu.cn (Song Y); xnzhang@sjtu.edu.cn (Zhang X)) 1 in 12 of 48 disciplines. Credit: Jiahua Ni, Shaoting Lin, Xuanhe Zhao, et al A lobster's underbelly is lined with a thin, translucent membrane that is both stretchy and surprisingly tough. Jiahua Ni Department of Bioengineering, University of California‐Los Angeles, Los Angeles, CA, 90095 USA Center for Minimally Invasive Therapeutics (C‐MIT), University of California‐Los Angeles, Los Angeles, CA, 90095 USA