Carbon nanotube

Chapter-4 (Introduction to FEM Analysis using COMSOL MULTIPHYSICS) 4.1 Introduction: In simplest form we can define Micro Electro Mechanical Systems (MEMS) as miniaturized electro-mechanical devices made by using various techniques of micro-fabrication, where the dimensions can be in the range from less than one micron to several millimeters. Many MEMS devices are of the size of a grain or the eye of a needle. MEMS is indeed one of the most promising and emerging areas of engineering. This…

Graphite, natural or synthetic, is composed of covalently bonded carbon atoms that are crystalline in structure due to Van der Waals attraction of its layered carbon sheets. It has a gray or black color, with thermal and electrical conductivity. With its properties, it can be used in many “industrial applications like in batteries and fuel cells” (Olson 2003). Although graphite has its useful characteristics, its performance is limited due to its large particles’ size resulting to “low aspect…

1. INTRODUCTION Graphene consists of single layer of carbon atoms arranged in a hexagonal lattice. It is the basic structural element of many other forms of carbon, such as graphite, charcoal, carbon nanotubes and fullerenes. In simple terms, graphene, is a thin layer of pure carbon bonded together in a hexagonal honeycomb lattice. It is the thinnest compound known to man, the lightest material known, the strongest compound discovered, the best conductor of heat at room temperature and also the…

Coursework 1- Carbon Fibre composites compared to traditional metallic properties Introduction Carbon fibre is a material made up of thin strips of crystalline filaments of carbon woven together to create a cloth or combined with a resin or ceramics to strengthen the material. Carbon fibre is now overtaking traditional metals in where it is being used and the reasons why will be discussed further on in the report (Happian-Smith 2001: 1). Carbon fibre composites have become the leading material…

It is also flexible. This material is also tough. A bumper made entirely of carbon fibre is the lightest available 5.0.0 ADVANTAGES AND DISADVANTAGES OF EACH BUMPER MATERIALS 5.0.1 Steel ADVANTAGES 1. Can have an attractive finish and wide range of decorative finishes available 2. Steel has the highest melting point so less likely…

TASK 4 CORRELATING STRUCTURE ACTIVITY RELATIONSHIPS Task 4 aims to develop knowledge of the relationship between the structure of ENMs and their toxicity. In this study, different kinds of metal oxide nanoparticles, carbon nanotubes, and graphenes will be tested their toxicities and then their structures and their toxicities will be found their correlations. For MONMs, different coatings of ZnO will be tested toxicities and observed the relationships, while differences in their sizes and…

known industrial processes produce materials which have dimensions in the nanometre size range. One example is the synthesis of carbon black by flame pyrolysis which produces a powdered form of carbon with a very high surface to mass ratio. This is usually highly agglomerated but has a primary particle size which can be of the order of 100 nm. Worldwide production of carbon black was approximately 6 million tonnes in 1993 (IARC,1996). Other common materials produced by flame pyrolysis or similar…

increasing the effect of the material properties [18]. According to Yang et al, nanocomposites have been shown to afford remarkable property enhancements compared to the conventional composite. Polymer nanocomposites with layered silicates and carbon nanotubes have attracted great interest for the improvement of structural properties and development of new materials with different functional properties [19]. Based on Potts et al, the property…

20Km/s [Ref], melting temperature of 4900 K [Ref] and also it has high electron mobility of 250,000 cm2/Vs [Ref] at room temperature. All these exceptional properties can be attributed due its 2D (two dimensional) honeycomb lattice of sp2-hybridized carbon atoms as shown in [Fig 1]. Due to the above said properties it has attracted increasing research…

employed in Sasol co. to improve their existing polymer product line. This would not only benefit the company but would also increase clients’ product satisfaction. Incorporation of different nanoreinforcements such as layered silicate clays, carbon nanotubes, nanofibers and silica nanoparticles into elastomers significantly enhances their mechanical, thermal, dynamic mechanical and barrier properties. Noticeable improvements in adhesion, rheological and processing behaviour can also be seen.…