Friday, May 22, 2020

Carbon Nanotubes Methods Of Preparation And Applications

TECHNICAL COMMUNICATION REPORT (CHN -391) Carbon Nanotubes : Methods of Preparation and Applications Submitted By: Chiranjeev Kumar Yadav ENROLLMENT NO :14112029 Date of Submission:- 7th November, 2016 Department of Chemical Engineering Indian Institute of Technology Roorkee CONTENTS . Abstract . Introduction . Properties 1. Strength 2. Wettability 3. Electrical Properties Synthesis 1. Arc Discharge Method 2. Plasma Torch Method 3. Laser Ablation method 4. Chemical Vapour Deposition Method Applications 1. In field of Energy 2. In field of Medicals 3. In field of Environment 4.In field of Materials Conclusion References ABSTRACT The demands and application carbon nanotubes(CNTs) is the important subject for research groups. In this report main focus is on the synthesis methods, the application is the main part of the studies. The four main synthesis methods discussed in this report are the arc discharge method, plasma torch , the chemical vapour deposition (CVD) and the laser ablation method. In begining of the CNTs synthesis the first three methods are used mainly for synthesis of Single walled carbon nano tubes while the fourth one produces mostly MWNTs. The principle of CVD is the breaking of many HCs at metal catalyst. Single-walled (SWNT), multi-walled (MWNT) nanotubes are synthesised. In producing of CNTs by using CVD method , catalyst helps to CNTs to grow from at surfaces. The growth of the nanotubes can be controlled by van der Waals forces and applied electricShow MoreRelatedElectronic Equipment s And Energy Storage1414 Words   |  6 Pagesdiscussed the exciting materials nanotubes in this outline and the study being carried out on our part. We discussed the materials that are suitable for manufacturing, their processing techniques and exotic applications with supported few references. 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Carbon nanotube Synthesis Methods: First High temperature preparation techniques such as arc discharge or laser ablation were used to produce CNTs But these techniques are outmoded by low temperature chemical vapour deposition (CVD) techniques (800 _C). Most of these methods require supporting gases and vacuum. Because gas-phase methods are volumetric, they are most suitable for applications like composite materials that require large quantities of nanotubes. Gas-phase synthesis methods disadvantagesRead MoreA Study On Preparing Titanium Metal Matrix Composites With Cnt Reinforcements For Various Compositions For Its Mechanical Properties1521 Words   |  7 PagesI. INTRODUCTION Many engineering applications in the field of aerospace engineering, automobiles, electronic equipment etc. require very light material with good mechanical properties. Titanium based metal matrix composites with carbon nanotube reinforcement can be a solution for such applications. It can satisfy the requirement of light weight with very good strength. This study focuses on preparing titanium metal matrix composites with CNT reinforcements for various compositions for its mechanicalRead MoreDifferent Types Of Nanoparticles1108 Words   |  5 Pagesmacromolecular materials and can be used therapeutically as adjuvant in drug carriers in which the active ingredient is dissolved, entrapped, encapsulated, adsorbed or chemically attached. There are two types of polymeric nanoparticles depending on the preparation processes which are nanospheres and nanocapsules. Nanospheres have a matrix in which drugs are dispersed or adsorbed onto their surfaces or encapsulated within the particles. 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Measuring micromechanically peeling layer graphene has been experimentally studied for over 40 years, and transport properties of graphene, the growth in [16among many other pote ntial applications. Graphene is experimental study for over 40 years, and the transport properties of the release layer was measured micromechanically graphene grown in a growth in the copper (Cu) largearea graphene substrateRead MoreCNTs Toxicity in Real Time Essay839 Words   |  4 Pages1991, Carbon nanotubes (CNTs) have gained a lot of interest due to their many unique physical and chemical properties. They are almost one dimensional structures with high mechanical strength (100 times stronger than Steel), ultra-light weight (1/6th the weight of steel) and exhibit excellent electrical and thermal conductivity. 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As described by Sidinei N Silva et al [46] high alumina bricks were generallyRead MoreUse Of Nanomaterials On Civil Engineering- A Review4874 Words   |  20 PagesParticularly, construction industry may possibly be one of the chief beneficiaries of these materials, because the properties of concrete, steel, glass and other building materials will improve with the applications of nanomaterials. Therefore, the potential use of nanomaterials such as carbon nanotubes, Cu nanoparticles, Ag nanoparticles, TiO2, SiO2, Al2O3, ZrO2, and Fe2O3 nano-oxides for enhancing the mechanical strengths and durability of c oncrete have been explored in the current study. It has been

Sunday, May 10, 2020

Analysis of Disability by Nancy Mairs - 1019 Words

University Of Balamand Faculty of Health Sciences English Communication Skills (Eng203) Critical analysis of â€Å"Disability† by Nancy Mairs Priscilla Farah May 11, 2012 Author of disability Nancy Mairs who’s a feminist and a cripple, has accomplished a lot in writing and teaching. Her remarkable personality shows in many of her essays especially in Disability which was first published in 1987 in the New York Times. In this essay, Nancy Mairs shows how disabled people are constantly excluded, especially from the media. By giving out facts and including her personal experiences, Mairs aims for making some changes regarding the relationship between the media and people with disabilities. Mairs thesis is shown implicitly in the first and last†¦show more content†¦As for the audience, this essay is addressed to all people who read the New York Times, while it should have been addressed specifically to advertisers so they can make a change regarding the inclusion of disabled people. Nancy Mairs in her â€Å"disability† has done a good job in delivering her message. I believe she managed to persuade the audience that there is no reason to exclude disabled people from the media. Her information was clear and made sense, her examples were enough to support her thesis and her tone added a certain flavor to her essay. â€Å"Disability† can actually make certain changes if it is addressed to its right audience and I certainly recommend it to my friends and anyone who might be interested in thisShow MoreRelatedAnalysis of Disability by Nancy Mairs1008 Words   |  5 PagesFaculty of Health Sciences English Communication Skills (Eng203) Critical analysis of â€Å"Disability† by Nancy Mairs Priscilla Farah May 11, 2012 Author of disability Nancy Mairs who’s a feminist and a cripple, has accomplished a lot in writing and teaching. Her remarkable personality shows in many of her essays especially in Disability which was first published in 1987 in the New York Times. In this essay, Nancy Mairs shows how disabled people are constantly excluded, especially from the mediaRead MoreUnderstanding the Disabled Essay1225 Words   |  5 PagesThe first thought that crosses the mind of an able-bodied individual upon seeing a disabled person will undoubtedly pertain to their disability. This is for the most part because that is the first thing that a person would notice, as it could be perceived from a distance. However, due to the way that disability is portrayed in the media, and in our minds, your analysis of a disabled person rarely proceeds beyond that initial observation. This is the underlying problem behind why disabled people feelRead MoreCom 156 Daily Questions1076 Words   |  5 PagesQu estions †¢ Read the cause and effect essay titled â€Å"Struggling for Perfection† on pp. 829–832. What supporting elements did Amy Beck use to support her key points? †¢ Ch. 13 describes process analysis in detail. What is the main point of process analysis in writing? Why are the four basic steps of process analysis important? What happens if you skip a step? †¢ In EBSCOhost, locate the article titled â€Å"Morphing Video Games into Movies.† Identify what you believe are the strongest parts of the articleRead MoreThe Effects Of Imperialism In George Orwells Shooting An Elephant1633 Words   |  7 Pagesclaim and experiences are very relatable today because as long as there are fathers and mothers and families, there are going to be those that re-live the past and create memories that last their families a lifetime, or perhaps even longer.    Process Analysis: Joan Didion, On Keeping a Notebook   Ã‚  Ã‚   In the selection On Keeping a Notebook, Joan Didion uses her experiences in day to day life as a writer in order to demonstrate the importance/methods of keeping a daily notebook. Didion appeals to her audience

Wednesday, May 6, 2020

Soccer Symbol Free Essays

Anas Salem Professor Michele Jelley 9/21/10 English Comp 101 Hidden Effects of Soccer Eduardo Galeano reflects upon one of, if not the most popular sport in â€Å"Soccer Is Everything. † He calls soccer â€Å"a powerful symbol, a great mystery. † The message that Galeano is trying to convey is that soccer is not just a sport anymore, it is much more than that. We will write a custom essay sample on Soccer Symbol or any similar topic only for you Order Now The reason is that soccer has affected individuals, groups, countries, cultures, and religion by unification because of its popularity and the diversity of its fans. First, Galeano says that soccer can affect individuals and groups.He explains how many who felt they have no place in the world found shelter through playing soccer, this happening at a time where suicide among the youth was at its highest rate in the world. Second, today it is obvious to see and notice how soccer affects countries. It does not matter how powerful or weak a country may be, Galeano says that when it comes to soccer, the rarest of events does happen, for example an Arab team to become the Israeli champion, or a country in war, Iraq, to make it to the semi finals.Thirdly, soccer has affected culture and religion. Galeano says soccer re-established bonds of solidarity broken by the culture of alienation dominant in today’s world. Also, while some saw women’s team as a source of pride for their country, it had an effect on people practicing the religion Islam, because Muslim men were against the idea of women playing soccer. Many did not allow or want it because the outfits the women wore revealed parts of the body that as a Muslim woman should be covered.And some Muslim men just accepted it to save their families from poverty. In conclusion, the message that Galeano is trying to convey when he calls soccer â€Å"a powerful, a great mystery,† is that soccer, which was just a sport, now has and continues to unify, shelter, surprise, and affect a majority of the population. Who would of thought a physical sport, can affect your life in ways you couldn’t imagine and become such a powerful symbol. How to cite Soccer Symbol, Papers