http://www.mdpi.com/journal/materials/special_issues/carbon-nanotube/ Dear Colleagues, Due to their unique physical and electronic properties carbon nanotubes (CNTs) have induced great interests among researchers since their discovery. Several techniques such as catalytic vapor deposition (CVD), HiPCO, arc discharge, laser ablation, etc. are now available as possible synthesis methods for carbon nanotube production. However, increasing gap between world demand and production capacity is imperative in achieving industrial scale production of carbon nanotubes of good quality and purity. With further optimization of growth conditions, the synthesis of carbon nanotubes can be successfully controlled. Overcoming these difficulties might certainly help their commercial use in nanoscience and nanotechnology. Prof. Dr. Klara Hernadi Guest Editor Submission All manuscripts should be submitted to materials@mdpi.com with a copy to the Guest Editor. 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The Article Processing Charge (APC) for publication in this Open Access journal is 800 CHF per accepted paper. http://www.mdpi.com/1996-1944/3/8/4387/ Carbon nanotubes (CNT) filled with ferromagnetic metals like iron, cobalt or nickel are new and very interesting nanostructured materials with a number of unique properties. In this paper we give an overview about different chemical vapor deposition (CVD) methods for their synthesis and discuss the influence of selected growth parameters. In addition we evaluate possible growth mechanisms involved in their formation. Moreover we show their identified structural and magnetic properties. On the basis of these properties we present different application possibilities. Some selected examples reveal the high potential of these materials in the field of medicine and nanotechnology. http://www.mdpi.com/1996-1944/3/8/4387/ Fri, 13 Aug 2010 00:00:00 CEST Materials 2010-08-13 3 8 Review 4387 4427 1996-1944 Carbon Nanotubes Filled with Ferromagnetic Materials 2010-08-13 doi: 10.3390/ma3084387 Uhland Weissker Silke Hampel Albrecht Leonhardt Bernd Büchner http://www.mdpi.com/1996-1944/3/8/4142/ The large-scale production of carbon nanomaterials by catalytic chemical vapor deposition is reviewed in context with their microwave absorbing ability. Factors that influence the growth as well as the magnetic properties of the carbon nanomaterials are discussed. http://www.mdpi.com/1996-1944/3/8/4142/ Fri, 30 Jul 2010 00:00:00 CEST Materials 2010-07-30 3 8 Review 4142 4174 1996-1944 Large-Scale Synthesis of Carbon Nanomaterials by Catalytic Chemical Vapor Deposition: A Review of the Effects of Synthesis Parameters and Magnetic Properties 2010-07-30 doi: 10.3390/ma3084142 Xiaosi Qi Chuan Qin Wei Zhong Chaktong Au Xiaojuan Ye Youwei Du http://www.mdpi.com/1996-1944/3/5/3092/ The challenge on carbon nanotubes is still the subject of many research groups. While in the first years the focus was on the new synthesis methods, new carbon sources and support materials, recently, the application possibilities are the principal arguments of the studies. The three main synthesis methods discussed in this review are the arc discharge, the laser ablation and the chemical vapour deposition (CVD) with a special regard to the latter one. In the early stage of the nanotube production the first two methods were utilized mainly for the production of SWNTs while the third one produced mainly MWNTs. The principle of CVD is the decomposition of various hydrocarbons over transition metal supported catalyst. Single-walled (SWNT), multi-walled (MWNT) and coiled carbon nanotubes are produced. In some case, interesting carbonaceous materials are formed during the synthesis process, such as bamboo-like tubes, onions, horn-like structures. In this paper, we refer to the progresses made in the field of the synthesis techniques of carbon nanotubes in the last decade. http://www.mdpi.com/1996-1944/3/5/3092/ Fri, 07 May 2010 00:00:00 CEST Materials 2010-05-07 3 5 Review 3092 3140 1996-1944 Synthesis Methods of Carbon Nanotubes and Related Materials 2010-05-07 doi: 10.3390/ma3053092 Szabó Perri Csató Giordano Vuono Nagy http://www.mdpi.com/1996-1944/3/4/2725/ Single-walled nanotubes (SWNT) have attracted significant attention because of the substance’s superior crystal quality, high thermal conductivity and current carrying capacity, thus emerging as an attractive material for nanoelectrics. To optimize the selection of SWNT structures in large-scale synthesis, an understanding of their growth mechanism is necessary. We report studies of the helicity distributions of SWNT using electron nanodiffraction. The overall statistical distribution of helicity has peaks at 0° and 30°. The peak evident at 0° was found to be a sharp local maximum, while the peak at 30° was broader. We also found that the helicity distribution varies from region to region of micrometer size. This observation indicates that local environment affects nanotube growth, resulting in different structural distributions. http://www.mdpi.com/1996-1944/3/4/2725/ Wed, 14 Apr 2010 00:00:00 CEST Materials 2010-04-14 3 4 Article 2725 2734 1996-1944 Helicity Distributions of Single-Walled Carbon Nanotubes and Its Implication on the Growth Mechanism 2010-04-14 doi: 10.3390/ma3042725 Wijeratne Harris Kiang http://www.mdpi.com/1996-1944/3/4/2618/ The CVD route for carbon nanotube production has become a popular method to make large amounts of multiwall carbon nanotubes. The structure, morphology and size of carbon materials depend critically on the catalyst preparation and deposition conditions. According to current knowledge, CVD method is the only process which can produce carbon nanocoils. These nanocoils are perfect candidates for nanotechnology applications. One might indeed hope that these coils would have the extraordinary stiffness displayed by straight nanotubes. Based on theoretical studies, regular coiled nanotubes exhibit exceptional mechanical, electrical, and magnetic properties due to the combination of their peculiar helical morphology and the fascinating properties of nanotubes. In spite of its technological interest, relatively low attention has been paid to this special field. In this paper we attempt to summarize results obtained until now. http://www.mdpi.com/1996-1944/3/4/2618/ Mon, 12 Apr 2010 00:00:00 CEST Materials 2010-04-12 3 4 Review 2618 2642 1996-1944 A Review of the Properties and CVD Synthesis of Coiled Carbon Nanotubes 2010-04-12 doi: 10.3390/ma3042618 Fejes Hernádi