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International Center for Materials Nanoarchitectonics eBulletin: Advanced Nano-fabrication Technology Catalyzing Discovery and Innovation at MANA

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TSUKUBA, Japan, March 21, 2019 /PRNewswire/ -- International Center for Materials Nanoarchitectonics (MANA), Japan, publishes the March 2019 issue of the MANA E-Bulletin featuring article on 'Advanced nano-fabrication technology catalyzing discovery and innovation at MANA' in addition to research highlights on 'Photonic Circuits Hosting Electromagnetic Waves with Pseudospin'; ' Origins of Macroscopic Friction Linked to Energy Landscape on the Nanoscale'; and 'Porous Structure of a Layered Silicate with Selective Adsorption Properties Revealed'.

March 2019

MANA E-BULLETIN VOL.06
https://www.nims.go.jp/mana/ebulletin/

FEATURE

Advanced nano-fabrication technology catalyzing discovery and innovation at MANA
Toshihide Nabatame
Manager of the Namiki Foundry, MANA

Facilities for lithography and nanofabrication were established at NIMS in 2004 under the leadership of Masakazu Aono, the Director the International Center for Materials Nanoarchitectonics (WPI-MANA) at NIMS from 2007 to 2017. The facilities became a part of WPI-MANA in 2009 and are now referred to as the Namiki Foundry.

More
https://www.nims.go.jp/mana/ebulletin/feature.html

Research Highlights

Photonic Circuits Hosting Electromagnetic Waves with Pseudospin
https://www.nims.go.jp/mana/research/highlights/vol47.html

Metamaterials are purposely built devices mimicking structural features of normal materials, but with unusual physical properties. Photonic crystals, for example, are periodic nanostructures consisting of material components with different refractive indices. They have lattice symmetries like solids, but the constituents of the unit cell of a photonic crystal are 'bits' of the different bulk materials. Similar to the structure–property relationships resulting from the behavior of electrons in solids (e.g. semiconduction), photonic crystals offer ways for manipulating the propagation of light. Now, Xiao Hu at the International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan, and colleagues have succeeded in creating a photonic metamaterial that displays a special property known as a topological photonic state.

More
https://www.nims.go.jp/mana/research/highlights/vol47.html

Reference
Y. Li et al., "Topological LC-circuits based on microstrips and observation of electromagnetic modes with orbital angular momentum", Nat. Comms. 9, 4598 (2018).
DOI: 10.1038/s41467-018-07084-2

Origins of Macroscopic Friction Linked to Energy Landscape on the Nanoscale
https://www.nims.go.jp/mana/research/highlights/vol48.html 
Everybody is familiar with friction — the phenomenon plays an important role in our daily lives. Yet, although phenomenological laws exist that describe friction on the macroscale, a detailed understanding of the processes involved on the microscale is lacking. Now, Hiroshi Sakuma and Shigeru Suehara (the International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan) with their colleagues have studied friction forces in mica, both theoretically and experimentally, and have found the origin of molecular friction in this system.

More
https://www.nims.go.jp/mana/research/highlights/vol48.html

Reference
H. Sakuma et al., "What is the origin of macroscopic friction?", Science Advances 4, eaav2268 (2018)
DOI: 10.1126/sciadv.aav2268

Porous Structure of a Layered Silicate with Selective Adsorption Properties Revealed 
https://www.nims.go.jp/mana/research/highlights/vol49.html

It is not always easy to precisely determine the crystal structure of layered materials — but in order to fully understand and exploit their properties, detailed structural information is needed. Magadiite is such a layered material, used as an adsorbent and a catalyst. It is known that magadiite is a kind of layered silicates: tetrahedra, each with oxygen atoms at the vertices and a silicon atom in the center, grouped in planar arrangements. The precise structure, however, was not known — partly because the material typically occurs as small lamellas displaying poor crystallinity — until now. Satoshi Tominaka at the International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan, and colleagues have succeeded in determining the crystal structure of magadiite. Based on their structural insights, Yusuke Ide (MANA, NIMS) and colleagues also managed to explain why the material has outstanding photocatalytic properties and proved its application in the synthesis of pure benzoic acid from toluene using a photocatalyst system.

Reference
Y. Ide, Satoshi Tominaka et al., "Zeolitic intralayer microchannels of magadiite, a natural layered silicate, to boost green organic synthesis", Chem. Sci.9, 8637 (2018).
DOI: 10.1039/c8sc03712d

Further information

The International Center for Materials Nanoarchitectonics
1-1 Namiki Tsukuba-shi Ibaraki, 305-0044 JAPAN
Tel:+81-029-860-4710
Email: mana-pr@ml.nims.go.jp
http://www.nims.go.jp/mana/ 

Image: https://mma.prnewswire.com/media/839412/fig_1_Namiki_Foundry.jpg
Image: https://mma.prnewswire.com/media/839414/fig_2_Microstrip.jpg
Image: https://mma.prnewswire.com/media/839415/fig_3_muscovite.jpg
Image: https://mma.prnewswire.com/media/839416/fig_4_magadiite.jpg

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