Featured Research

from universities, journals, and other organizations

Success in growth of regularly-ordered nanometer-scale crystalline thin film using 3-D porous material

Date:
August 29, 2012
Source:
National Institute for Materials Science
Summary:
Japanese scientists have succeeded in fabricating a crystalline thin film with a film thickness of nanometer order, in which molecules of a 3-dimensionally strong porous coordination polymer (PCP) are oriented in a designated direction, and demonstrated that this thin film has a reversible gas adsorption/desorption reaction function.

Japanese scientists have succeeded in fabricating a crystalline thin film with a film thickness of nanometer order, in which molecules of a 3-dimensionally strong porous coordination polymer (PCP) are oriented in a designated direction, and demonstrated that this thin film has a reversible gas adsorption/desorption reaction function.

A joint research group consisting of the Japan Synchrotron Radiation Research Institute (JASRI located at the SPring-8 site), Kyoto University, and the National Institute for Materials Science (NIMS) succeeded in fabricating a crystalline thin film with a film thickness of nanometer order, in which molecules of a 3-dimensionally strong porous coordination polymer (hereinafter, PCP) are arranged (oriented) in a designated direction, and demonstrated that this thin film has a reversible gas adsorption/desorption reaction function.

A variety of functions can be expected with PCP, which possesses high gas adsorption characteristics and high regularity (crystallinity), including high efficiency separation and concentration of gas molecules, reaction in the interiors of the pores, etc. For this reason, it is possible to fabricate various types of energy related devices, such as high efficiency fuel cells, etc., by integrating PCP having different functions. When constructing devices of this type, fabrication in which the orientations of the crystals in multiple PCP films are aligned, in other words, oriented growth, is necessary and indispensable for integration of different types of PCP with tight adhesion. However, until now, oriented growth had only been successful with planarly-rigid PCP. In order to realize diverse functions, durability of the fabricated device, and adhesion between different types of PCP during integration, a technology which enables oriented growth of crystals of PCP with 3-dimensional rigidity had been desired.

In this work, the joint research group succeeded in fabrication of a 3-dimensional PCP nanometer scale thin film in which oriented growth was realized by selection of an appropriate substrate for oriented growth, surface processing of that substrate, and selection of a metal-organic framework (MOF) material that enables control of the growth direction while also displaying 3-dimensional rigidity. In addition to the fact that a reversible gas adsorption-desorption occurs in this nanometer scale thin film, the rigidity of the thin film was also confirmed, meaning that adsorption-desorption reaction can be performed without accompanying changes in the frame structure. The oriented growth of these nanometer scale thin films and structural changes during adsorption and desorption could be confirmed for the first time in detailed diffraction experiments using the brilliant X-rays at the SPring-8.

Because these research results will provide the basic technology for fabrication of new functional devices by integration of PCP with different functions, it is expected that research and development on functional devices using nanometer scale thin films and application to high performance in fuel cells, etc. will be greatly accelerated.

This research was carried out as part of the research project "Creation of Metal-Organic Hybrid Protonics and Functional Nano-Layer Integrated System" (Hiroshi Kitagawa, Research Representative) in the "Development of the Foundation for Nano-Interface Technology" project under the Core Research for Evolutional Science and Technology (CREST) team-type research program of the Japan Science and Technology Agency (JST). The measurements were supported by JASRI using the SPring-8.


Story Source:

The above story is based on materials provided by National Institute for Materials Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Kazuya Otsubo, Tomoyuki Haraguchi, Osami Sakata, Akihiko Fujiwara, Hiroshi Kitagawa. Step-by-Step Fabrication of a Highly Oriented Crystalline Three-Dimensional Pillared-Layer-Type Metal–Organic Framework Thin Film Confirmed by Synchrotron X-ray Diffraction. Journal of the American Chemical Society, 2012; 134 (23): 9605 DOI: 10.1021/ja304361v

Cite This Page:

National Institute for Materials Science. "Success in growth of regularly-ordered nanometer-scale crystalline thin film using 3-D porous material." ScienceDaily. ScienceDaily, 29 August 2012. <www.sciencedaily.com/releases/2012/08/120829112228.htm>.
National Institute for Materials Science. (2012, August 29). Success in growth of regularly-ordered nanometer-scale crystalline thin film using 3-D porous material. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2012/08/120829112228.htm
National Institute for Materials Science. "Success in growth of regularly-ordered nanometer-scale crystalline thin film using 3-D porous material." ScienceDaily. www.sciencedaily.com/releases/2012/08/120829112228.htm (accessed September 23, 2014).

Share This



More Matter & Energy News

Tuesday, September 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Company Copies Keys From Photos

Company Copies Keys From Photos

Newsy (Sep. 22, 2014) A new company allows customers to make copies of keys by simply uploading a couple of photos. But could it also be great for thieves? Video provided by Newsy
Powered by NewsLook.com
Rockefeller Oil Heirs Switching To Clean Energy

Rockefeller Oil Heirs Switching To Clean Energy

Newsy (Sep. 22, 2014) The Rockefellers — heirs to an oil fortune that made the family name a symbol of American wealth — are switching from fossil fuels to clean energy. Video provided by Newsy
Powered by NewsLook.com
Raw: SpaceX Rocket Carries 3-D Printer to Space

Raw: SpaceX Rocket Carries 3-D Printer to Space

AP (Sep. 22, 2014) A SpaceX Rocket launched from Cape Canaveral, carrying a custom-built 3-D printer into space. NASA envisions astronauts one day using the printer to make their own spare parts. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Inside London's Massive Sewer Tunnel Project

Inside London's Massive Sewer Tunnel Project

AP (Sep. 22, 2014) Billions of dollars are being spent on a massive super sewer to take away London's vast output of waste, which is endangering the River Thames. (Sept. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins