Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Crystal film growth: nanosheets extend epitaxial growth applications

19.12.2013
Molecularly thin two-dimensional crystals can alleviate the lattice matching restrictions of epitaxial crystalline thin film growth, as reported by researchers in Japan.
Source: Research highlight from MANA, the International Center for Materials Nanoarchitectonics at NIMS, Tsukuba, Japan.

Schematic illustration of nanosheet structures for Ca2Nb3O10-, Ti0.87O20.52-, and MoO2ä− nanosheets and corresponding crystal planes of SrTiO3.

Tsukuba, Japan (MANA) 17 December 2013

MANA Research Highlights:

Epitaxial growth has become increasingly important for growing crystalline thin films with tailored electronic, optical and magnetic properties for technological applications. However the approach is limited by the high structural similarities required between an underlying substrate and a growing crystal layer on top of it.

Takayoshi Sasaki and colleagues at the International Center for Materials Nanoarchitectonics (MANA) and the University of Tokyo in Japan demonstrate how using two-dimensional materials they can extend the versatility of epitaxial growth techniques.

In 1984 Komo proposed that certain layered materials such as mica or graphite can be easily cleaved to produce surfaces with no dangling bonds that would alleviate the lattice matching requirements for epitaxial growth.

Interactions between adatoms on these cleaved materials would be more prominent compared with growth on single crystalline substrates since the interlayer van der Waals interactions are weak. However the variety of suitable cleaved surfaces is limited and handling them can be difficult.

With the increasing attention on two-dimensional materials over recent years Takayoshi Sasaki and colleagues decided to look into molecularly thin two-dimensional crystals as possible seed layers to alleviate lattice matching requirements in a manner similar to Komo’s van der Waals epitaxy.

They deposited nanosheets of either Ca2Nb3O10-, Ti0.87O20.52-, or MoO2ä- as highly organised layers onto amorphous glass. On these different surfaces they grew different orientations of SrTiO3, an important perovskite for various technological applications. The approach demonstrated the ability to grow different orientations of SrTiO3 with a high level of precision.

The researchers suggest that in the future, it would be of great interest to achieve more sophisticated control of growth geometry using nanosheets with a complex structure. They add, “Such advanced design, hardly realized with present technology, will pave a new way for further development of crystal engineering.”

Contact Information
International Center of Materials Nanoarchitectonics (MANA)
National Institute for Materials Science
1-1 Namiki Tsukuba, Ibaraki 305-0044 JAPAN
Phone: +81-29-860-4710
E-mail: mana-pr@ml.nims.go.jp
About MANA
http;//www.nims.go.jp/mana/
MANA Research Highlights
Crystal film growth: nanosheets extend epitaxial growth applications
http://www.nims.go.jp/mana/research/highlight/vol8.html
Publisher
International Center for Materials Nanoarchitectonics (WPI-MANA)
Address: 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
URL: http://www.nims.go.jp/mana/
Journal information
Versatile van der Waals epitaxy-like growth of crystal films using two-dimensional nanosheets as a seed layer: Orientation tuning of SrTiO3 films along three important crystallographic axes of (100), (110) and (111) on glass substrate Tatsuo Shibata1, Hikaru Takano1, Yasuo Ebina1, Dae Sung Kim1, Tadashi C. Ozawa1, Kosho Akatsuka1,Tsuyoshi Ohnishi1, Kazunori Takada1, Toshihiro Kogure2, and Takayoshi Sasaki*1,2013 J. Mater. Chem. C DOI:10.1039/C3TC31787K
Affiliations
1. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
2. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

*Corresponding author.

Adarsh Sandhu | Research asia research news
Further information:
http://www.nims.go.jp/mana/
http://www.researchsea.com

More articles from Materials Sciences:

nachricht Scientist invents way to trigger artificial photosynthesis to clean air
26.04.2017 | University of Central Florida

nachricht Researchers invent process to make sustainable rubber, plastics
25.04.2017 | University of Delaware

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

Scientist invents way to trigger artificial photosynthesis to clean air

26.04.2017 | Materials Sciences

Ammonium nitrogen input increases the synthesis of anticarcinogenic compounds in broccoli

26.04.2017 | Agricultural and Forestry Science

SwRI-led team discovers lull in Mars' giant impact history

26.04.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>