Vol.9 No.3 2017

Research paper−167−Synthesiology - English edition Vol.9 No.3 pp.167–179 (Feb. 2017) number of CNT papers has been on the rise. The number of CNT researchers is gradually decreasing since the research boom for CNTs has somewhat settled, but the number of papers is increasing, and this shows that CNTs have spread widely as research material and the number of CNT users has increased. CNT is used for research that generates over 8,000 papers annually, and this is a testament to the fact that CNTs have multiple characteristics that can be applied to various uses.While academic research of CNTs is enthusiastically conducted, single-walled CNTs are used in a limited manner despite the competitive R&D around the world since its discovery 20 years 1 Background of research1.1 Introduction of the single-walled CNTA single-walled carbon nanotube (single-walled CNT, Fig. 1) is composed of a structure in which graphene, which is composed of carbon atoms aligned in a planar honeycomb structure, is rolled into a one-walled cylinder. Ever since the discovery of single-walled CNTs was reported by Dr. Sumio Iijima[1] and the IBM group[2] in 1993, it was experimentally shown to possess electroconductivity, thermal conductivity, and mechanical strength that could not be achieved by conventional materials, and much R&D was conducted with fervor. The application of single-walled CNTs spreads widely over chemical, electrical, and mechanical fields, and as a prime nanotechnology material, researchers around the world have been engaging in erce competition since its discovery 20 years ago. Figure 2 shows the change in the number of papers on CNTs. Since its discovery 20 years ago, the - Development of a mass production technique for industrial application-More than 20 years have passed since Dr Sumio Iijima discovered single-walled carbon nanotubes (CNTs). Development of this material is still an active area of research, world-wide, because the expected high electric and heat conductivity and mechanical strength properties are difcult to obtain with other existing materials. However, low growth efciency of single-walled CNTs has made the cost of production high compared to that of multi-walled CNTs. Consequently, commercialization of single-walled CNTs has taken longer to develop than multi-walled CNTs. To address this problem, a super-growth process was developed at the National Institute of Advanced Industrial Science and Technology (AIST) that uses an innovative chemical vapor deposition (CVD) method. The super-growth method opens the door to a range of industrial applications widely. This report describes the development of this process for industrial scale, mass production of high quality single-walled CNTs, with commercialization in mind, from the perspective of business-academia collaboration.A super-growth method for single-walled carbon nanotube synthesis Keywords : Super-growth CVD, single-walled CNT, element technology integration, industrial application, business-academia collaboration [Translation from Synthesiology, Vol.9, No.3, p.165–177 (2016)]Kenji HataCNT-Application Research Center, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan * E-mail: Original manuscript received May 17, 2016, Revisions received September 15, 2016, Accepted September 30, 2016Fig. 1 Single-walled CNTFig. 2 Change in the number of CNT papers"(($"((%"((&"(('"(()"((*"(((#!!!#!!"#!!##!!$#!!%#!!&#!!'#!!)JapanUSAChinaKoreaEurope200620072008200920102011201220052004200320022001200019991998199719961995199419936000700080009000500040003000200010000Change in the number of CNT papers

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