Japan science news

Research groups of Hiroshi Shimizu invitation (Sho wall) researchers of National Institute of Advanced Industrial Science and Technology developed the counter electrode raw material of the dye sensitizing type solar cell that did not use platinum.
The confirmation lingua of showing the same degree of the characteristic as platinum by the raw material that uses carbon nanotube (CNT) of the multi-layer.
It is Iu when leading to the decrease of the manufacturing cost and the technology of making to the large area.
The counter electrode that the research group developed is a structure to place by the electroconductive polymer with the ionic liquid further as for multi-layer CNT.
The polystyrene sulfo aluminium of the imidazole that the ionic liquid and was the electroconductive polymer was sonicated to CNT after the lingua of the hybrid, and centrifuge method Shite was made.
Almost the same value was obtained by characteristics of conversion efficiency and the electric current density, etc. compared with the platinum counter electrode.
The research group excels as a counter electrode raw material that takes the place of platinum in electroconductive, pays attention to CNT that has come to be able to do the quantity synthesis, and has advanced the research.
However, there were difficulties in the formability and the dispersion because there was CNT in powder form.

- transverse electromagnetic photograph (AIST) multi-layer carbon nanotube (MWNT) and ionic liquid (IL) of ternary system counter electrode raw material of core and shell structure to develop photograph Http://www.aist.go.jp/aist_j/new_research/nr20101201/fig3_1.jpg

http://www.nikkan.co.jp/news/nkx0720101202eaad.html

- Press release
http://www.aist.go.jp/aist_j/new_research/nr20101201/nr20101201.html

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Italian Prof. Tan at the changed technology development first world of diameter of carbon Nano Molva molva and Nagoya University et al.

The research group of Prof. Kenichiro Tan Italy (39) of Nagoya University is the 25th.
It was announced that the technology that the diameter of shortest carbon nanotube "Carbon Nano Molva molva" is freely changed had been developed for the first time in the world.

The carbon nanotube is a material to which the carbon atom ranges cylindrical.
It is thin of about 1/10,000 of the hair, there strength ten times or more iron, and the application to the semiconductor etc. is expected as a material of the next generation.

Italian Prof. Tan's group is organic compound that composes the carbon nanotube last year.
12"Benzene" was connected, and it succeeds to make shortest carbon nanotube "Carbon Nano Molva molva".
It ..15.. connected by 16 pieces, and three kinds of carbon Nano Molva molva of 2.2 nanometers were made and it succeeded by 1.9 nanometers in the diameter and 2.05 nanometers reaction "Suzuki coupling" that tied organic compound that the Sskishou emeritus professor of Hokkaido University that won the Nobel Prize in Chemistry developed use, and 14 respectively benzene further at this time in division.

Nano is an unit of the parts per billion.

Italian Prof. Tan｢The diameter of the Molva molva is changed by changing the number of benzenes. It might be useful for the research and the application of the carbon nanotube. ｣It speaks. 
The thesis of the group was published in "Angebante hemi international edition" electronic version of the German science magazine.

http://www.yomiuri.co.jp/e-japan/aichi/news/20101125-OYT8T01168.htm

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The Akita University environmental resource Gakken Co., Ltd. Kiwami center (Akitashi) announced that they succeeded in making the grade 99% or more of metallic silicon = ? = in a used diatom (Kei aspect) soil Tomomi shell on the 18th.
The chemical reaction can be early because a lot of carbons are contained, and a used diatomaceous earth and the rice hull be made by the low energy.
As for the center, it aims at use to the solar cell material, and the cost etc. will search for the possibility of the verification and making to the business by the coming year.
A joint research named central silica (Kitaakita City).
The carbonizing rice hull was mixed, it was made to react in arc furnace, and the metallic silicon was made with the diatomaceous earth used to filter a beer and green tea, etc.
The time that hung to the reaction is a lingua of the cutback in 1/3 compared with a manufacturing method conventionally at the time of used an original soil of the graphite and the diatomaceous earth.
The diatomaceous earth shipment of the whole country is about 80,000 tons a year according to the center, and about 10,000 tons are mined Akita inside a prefecture among these.
The cost that reclaims conventionally and is disposed of for recycling to become possible is reduced, and the maintenance of the diatomaceous earth mining business can be expected.
The center thinks that the rice hull exhausted by the bioethanol examination business of the prefecture is used.
Lecturer Hideki Murakami of Akita University engineering resources Gakken Co., Ltd. Kiwameca｢Most of the metallic silicon imports it from China now. It is also possible to accumulate from mining to the commodity production in Akita Prefecture if it is possible to make it to the business. ｣It speaks. 

< metallic silicon > set of silicon atom. It is used for the material and the semiconductor part of the solar cell.
It is expected as a raw material of the polymetric material that takes the place of oil.
Because a huge electric power is needed for making, it is not produced domestically.

- Metallic silicon http://www.kahoku.co.jp/img/news/2010/20101119003jd.jpg made with photograph used diatomaceous earth Tomomi shell

http://www.kahoku.co.jp/news/2010/11/20101119t45034.htm

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