Elastic properties of nano diamond revealed for the first time

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Dr. Yang Lu’s research team, including Mr. Amit Banerjee and Dr. Hongti Zhang under his supervision, has discovered that diamonds at nanoscale can undergo ultralarge, fully reversible elastic deformation. The research team demonstrated that when diamond was downsized to nearly 100 nanometres in diameter, which is about one six-hundredth of the size of human hair, up to around 9% of tensile elastic strain was recorded for single crystalline samples. The findings could have a profound impact on the nanotechnology and biomedical fields, and even quantum information technologies. This groundbreaking discovery was recently published in the prestigious journal Science under the title “Ultralarge elastic deformation of nanoscale diamond”.

Period18 Apr 2018 → 25 Apr 2018

Media coverage

Title中外科學家在納米尺度發現金剛石超彈性變形
Description日前，由中國香港城市大學陸洋副教授牽頭的國際聯合研究團隊在納米尺度下金剛石的力學行為研究方面取得重大突破。研究首次觀測到納米級金剛石可承受前所未有的巨大形變且能迅速恢復原狀，其中單晶金剛石樣本的局部拉伸彈性形變量最大可達到約9%，接近金剛石在理論上可達到的彈性變形極限。該研究成果於4月20日發表在美國《科學》雜志上。
Persons
  • Yang LU
Media name/outletPeople's Daily (人民日报)
Media typeWeb
Date25/04/18
Title城大發現納米鑽石具彈性
Description鑽石是世上最堅硬的物料，但原來最堅硬的物料也會具彈性！由城市大學機械及生物醫學工程學系副教授陸洋帶領的國際研究團隊發現，納米級鑽石能夠承受極大的變形並能完全恢復原狀，屬全球首次發現，將對納米科技、生物醫學領域，以至量子資訊科技產生重要影響。
Persons
  • Yang LU
Media name/outletSing Tao Daily (星島日報)
Media typeWeb
Date24/04/18
Linkstd.stheadline.com/daily/news-content.php?id=1789439&target=2
Title城大揭變形鑽 助納米科技應用
Description鑽石被指是世界上最堅硬的天然物質，似乎永不會變形，不過，由城大機械及生物醫學工程學系副教授陸洋領導的國際研究團隊透過嶄新的「壓縮－彎曲」測試法，發現原來當鑽石小到約人類頭髮六百分之一粗幼的納米級時，能承受約9%的變形並能完全恢復原狀。這項突破性發現顛覆過往人類對鑽石的認知，將對納米科技、生物醫學領域，以至量子資訊科技產生重要影響，未來細胞內藥物傳輸有望更持久，電腦或將更小、更薄、運算速度更快。相關研究本周在《科學》期刊上發表，題為「納米鑽石的超大彈性變形」，共同第一撰寫人包括陸洋指導的研究生Amit Banerjee及張洪題。
Persons
  • Yang LU
Media name/outletWen Wei Po (文匯報)
Media typeWeb
Date24/04/18
Linkpaper.wenweipo.com/2018/04/24/ED1804240004.htm
Title納米級鑽石 具伸縮彈性
Description鑽石十分堅硬，但原來亦可變形兼具彈性。城大研究發現，納米級鑽石能承受極大的變形，並能完全恢復原狀，打破鑽石堅硬的既定形象。研究團隊將鑽石的大小降至100納米，其拉伸彈性應變能力可達約9%，即比原本的大粒鑽石高。負責研究的機械及生物醫學工程學系副教授陸洋指，是次研究將徹底改變大眾對鑽石的一貫認知，未來有可能進一步探索的領域，包括以納米鑽石針把藥物傳輸至人體細胞，「我們發現了納米鑽石具彈性，可使這種細胞內藥物傳輸更持久，且成本更低。」是次研究獲香港研究資助局及國家自然科學基金資助，並於《科學》期刊上發表。
Persons
  • Yang LU
Media name/outletSky Post (晴報)
Media typeWeb
Date24/04/18
Linkhttps://skypost.ulifestyle.com.hk/article/2058460/%E7%B4%8D%E7%B1%B3%E7%B4%9A%E9%91%BD%E7%9F%B3+%E5%85%B7%E4%BC%B8%E7%B8%AE%E5%BD%88%E6%80%A7
TitleElastic properties of nano diamond revealed for the first time
DescriptionLed by Dr Lu Yang, Associate Professor in the Department of Mechanical and Biomedical Engineering (MBE) at CityU, an international research team discovered that diamonds at nanoscale can undergo ultralarge, fully reversible elastic deformation, findings that could have a profound impact on the nanotechnology and biomedical fields, and even quantum information technologies.

This groundbreaking discovery was published in the prestigious journal Science this month under the title “Ultralarge elastic deformation of nanoscale diamond”. It was jointly presented by Amit Banerjee and Zhang Hongti, two of the co-first authors of the paper supervised by Dr Lu.

In this project, Dr Lu and his team aimed to characterise the mechanical properties of nanoscale diamonds by using their unique in situ nanoindenter platform inside electron microscopes. The diamond samples were fabricated by Professor Zhang Wenjun of the Department of Materials Science and Engineering.
Persons
Media name/outletCityU NewsCentre
PlaceHong Kong
Media typeWeb
Producer/AuthorCatherine Law
Date23/04/18
Linkhttps://newscentre.cityu.edu.hk/media/news/2018/04/23/elastic-properties-nano-diamond-revealed-first-time
TitleSe il diamante diventa flessibile
DescriptionIl materiale naturale più duro di tutti può diventare flessibile se prodotto in forma di nanostrutture a forma di aghi. Una nuova tecnica ha dimostrato che campioni di questo tipo possono essere flessi e stirati del 9 per cento, contro l'1 per cento dei diamanti naturali, facendo intravedere numerose possibili applicazioni tecnologiche.
Persons
  • Yang LU
Media name/outletLe Scienze (The Science)
Media typeWeb
Date23/04/18
Linkwww.lescienze.it/news/2018/04/23/news/diamante_nanostrutture_flessibile-3951564/?rss&refresh_ce
TitleScientists can now make diamonds bend and stretch like rubber
DescriptionApart from the use of diamond as an ornament, this shiny piece has a number of applications because of it is the hardest material in the world. However, its brittle nature limits its use as it lacks the ability to stretch and bend. But according to a new study published in the journal Science, an international team of scientists have found a way to make diamonds bend and stretch.
Persons
  • Yang LU
Media name/outletIndia Today
Media typeWeb
Date23/04/18
Linkhttps://www.indiatoday.in/education-today/gk-current-affairs/story/diamond-nano-bend-stretch-1218008-2018-04-23
Title恒久不變承諾幻滅了　城大發現納米鑽可變形
Description鑽石真的恒久不變？香港城市大學一項研究發現，納米級鑽石可承受極大的變形，並能完全恢復原狀。研究顯示，若將鑽石大小降至100納米，即相等於人類頭髮六百分之一粗幼時，可以令鑽石的拉伸彈性應變能力比原本的大粒鑽石高，從而打破鑽石堅固不摧的傳統觀念：鑽石本身可以具有彈性，即可以變形，也可以回復原狀。
Persons
  • Yang LU
Media name/outletOriental Daily News (東方日報)
Media typeWeb
Date23/04/18
Linkhk.on.cc/hk/bkn/cnt/news/20180423/bkn-20180423122805350-0423_00822_001.html
TitleScientists Discover How to Bend and Stretch Diamonds—the Hardest Natural Material 
Persons
  • Yang LU
Media name/outletBrinkwire
Media typeWeb
Date22/04/18
Title科学家在纳米尺度下实现金刚石超弹性
Description4月20日，《科学》（Science）杂志报道了一项由中美科学家领导的国际科研团队对金刚石在纳米尺度下力学行为的重大发现：该项研究首次观测到在纳米级金刚石可承受前所未有的巨大形变且能恢复原状，而其中单晶纳米金刚石的局部弹性拉伸形变最大可以达到约百分之九，接近金刚石在理论上所能达到的弹性变形极限。为针对金刚石这一特殊的脆硬材料进行定量纳米力学测试，中国香港城市大学机械与生物医学工程系副教授陆洋带领研究小组基于城大先进的电子显微镜平台，发展了一套独特的纳米力学实验方法，实现了电镜实时观察下对纳米金刚石锥样品进行压缩-弯曲测试。实验结果显示，单晶金刚石纳米锥可以实现前所未有的大变形且在极大范围内可完全瞬时回复。
Persons
  • Yang LU
Media name/outletScienceNet.cn (科学网)
Media typeWeb
Date22/04/18
Linknews.sciencenet.cn/htmlnews/2018/4/409960.shtm
TitleHallan una forma de doblar los diamantes
DescriptionAdemás de por su belleza, los diamantes son apreciados en multitud de aplicaciones industriales por su gran dureza y resistencia. Sin embargo, cualquier intento de deformarlos suele terminar con este valioso material hecho trizas debido a su fragilidad. Ahora, investigadores de la Universidad de la Ciudad de Hong Kong (China) han logrado por fin que el duro diamante «ceda» un poco, aunque para ello han tenido que descender al nanomundo. En el estudio, que publica esta semana la revista «Science», también han participado científicos de Corea, Singapur y EE.UU..
Persons
  • Yang LU
Media name/outletABC (Spain)
Media typeWeb
Date22/04/18
Linkwww.abc.es/ciencia/abci-hallan-forma-doblar-diamantes-201804212111_noticia.html
TitleScientists Find a Way to Bend And Stretch Diamond, One of The Hardest Materials on Earth
DescriptionDiamond isn't the first material that springs to mind when it comes to bending and stretching, but scientists have found a way to manipulate one of the hardest minerals on Earth - and it could lead to a slew of technological advances. Knowing that diamond nano-needles have this extra malleability could help in all kinds of fields, from delivering drugs into cancer cells to improving the design of data storage devices, according to the researchers. "We developed a unique nanomechanical approach to precisely control and quantify the ultralarge elastic strain distributed in the nano-diamond samples," says one of the team, Yang Lu from City University in Hong Kong. The research has been published in 'Science'.
Persons
  • Yang LU
Media name/outletScienceAlert
Media typeWeb
Date21/04/18
Linkhttps://www.sciencealert.com/scientists-figure-out-bending-and-stretching-nanoscale-diamonds
Title鑽石全球最硬？專家：有彈性
Description鑽石是世界上最堅硬的天然材料。但一個國際科研團隊發現，鑽石在納米尺度上是有彈性的，可以像橡皮一樣彎曲變形還能恢復原狀。相關論文發表在新一期美國《科學》雜誌上。這一發現有望應用於數據存儲、體內成像設備和藥物傳遞等領域。
Persons
  • Yang LU
Media name/outletChine Press (中國報)
Media typeWeb
Date21/04/18
Linkwww.chinapress.com.my/20180421/%E9%91%BD%E7%9F%B3%E5%85%A8%E7%90%83%E6%9C%80%E7%A1%AC%EF%BC%9F-%E5%B0%88%E5%AE%B6%EF%BC%9A%E6%9C%89%E5%BD%88%E6%80%A7/
Title钻石在纳米尺度上有弹性
Description钻石是世界上最坚硬的天然材料。但一个国际科研团队发现，钻石在纳米尺度上是有弹性的，可以像橡皮一样弯曲变形还能恢复原状。论文共同高级作者、香港城市大学力学和生物医学工程副教授陆洋说，他们使用了一种独一无二的纳米力学方法，可精准控制和量化纳米钻石样品的超大拉伸应变。相关论文发表在新一期美国《科学》杂志上。这一发现有望应用于数据存储、体内成像设备和药物传递等领域。
Persons
  • Yang LU
Media name/outletXinhuanet (新华网)
Media typeWeb
Date21/04/18
Linkwww.xinhuanet.com/world/2018-04/21/c_1122719072.htm
TitleScientists Discover How to Bend and Stretch Diamonds—the Hardest Natural Material
DescriptionDiamond is known for being the hardest naturally occurring material. But any attempt to deform it will usually result in fractures due to its brittleness. This limits the material’s usefulness in some applications. But now, an international team of scientists has found a way to make diamond bend and stretch like rubber, according to a new study published in the journal Science. Researchers from MIT, Singapore's Nanyang Technological University and the City University of Hong Kong found that diamond in the form of extremely tiny, needle-like shapes, could be bent and stretched before snapping back to its original shape.
Persons
  • Yang LU
Media name/outletNewsweek
Media typeWeb
Date20/04/18
Linkwww.newsweek.com/scientists-discover-how-bend-and-stretch-diamonds-hardest-natural-material-895132
TitleHow to Bend Diamonds
DescriptionAn international team of researchers has demonstrated that diamonds, which are commonly believed to be inflexible, can be bent and stretched significantly. In research described in the journal 'Science', scientists from the City University of Hong Kong, China, the Massachusetts Institute of Technology, Ulsan National Institute of Science and Technology (UNIST) in South Korea and Nanyang Technological University in Singapore produced nanoscale diameter (about 100-300nm) diamond needles using reactive ion etching (RIE) of CVD (chemical vapor deposition)-grown diamond thin films. They showed that the maximum tensile elastic strain of a diamond can reach nearly 9 percent, close to the theoretical limit of the material.
Persons
  • Yang LU
Media name/outletIEEE Spectrum
Date19/04/18
Linkhttps://spectrum.ieee.org/nanoclast/semiconductors/materials/flexible-nanodiamonds-bend-into-new-band-gap-structures
TitleHow to Bend A Diamond
DescriptionDiamond is the hardest natural material, but now scientists have shown that it can bend and stretch, much like rubber, and even elastically snap back into shape — even if it only happens with diamonds that are very small. “The hardest natural material, diamond, which is commonly believed to be undeformable, can be bent and stretched significantly,” said study co-senior author Yang Lu, a materials scientist and mechanical engineer at City University of Hong Kong. “A diamond needle could be severely bent almost 30 degrees and, more importantly, fully recover.” Such flexibility could open up a wide new range of applications for diamond, the researchers say.
Persons
  • Yang LU
Media name/outletDiscover Magazine
Media typeWeb
Date18/04/18