Introduction & Application of Nano-materials-part-1

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<ul><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 1/28</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 2/28</p><p>OUTLINE OF THE</p><p>PRESENTATION</p><p> Introduction</p><p> History</p><p> Approaches Terms</p><p> Applications</p>http://images.google.com/imgres?imgurl=http://sbchem.sunysb.edu/msl/c60f.jpg&amp;imgrefurl=http://sbchem.sunysb.edu/msl/fullerene.html&amp;h=655&amp;w=655&amp;sz=126&amp;tbnid=j3DVLiD8ZXQJ:&amp;tbnh=136&amp;tbnw=136&amp;prev=/images?q=bucky+ball&amp;hl=en&amp;lr=&amp;oi=imagesr&amp;start=1</li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 3/28</p><p>INTRODUCTIONS OF NANO</p><p>MATERIAL</p><p> A prefix that means very, very,small</p><p>The word nano is from the Greek word</p><p>Nanos meaning Dwarf. It is a prefix used</p><p>to describe "one billionth" of something</p><p>prefix that means very, very,small</p><p>g, or 0.000000001.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 4/28</p><p>DEFINITION</p><p> National Nanotechnology Initiative (US)</p><p>nanotechnology is the understanding and</p><p>control of matter at dimensions of roughly 1 to</p><p>100 nanometers, where unique phenomena</p><p>enable novel applications. (National</p><p>Nanotechnology Initiative, n.d.).</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 5/28</p><p>5</p><p>The Nano size</p><p>1 nanometer = 1 billionth of a meter or</p><p>1</p><p>1,000,000,000</p><p>= 10 -9 meter</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 6/28</p><p>6</p><p>cm mm mm nm</p><p>10-2 10-3 10-610-4 10-5 10-7 10-8 10-9(m)</p><p>Hair</p><p>100 mmPenny2 cm</p><p>Raindrop1 mm</p><p>Red Blood Cell</p><p>5 mm</p><p>What Is A Nanometer?</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 7/28</p><p>7</p><p>...the</p><p>chromosmesblocks can bestudied.</p><p>10-910 Angstroms1 nanometer</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 8/28</p><p>History of Nanomaterial</p><p>Richard Feynman (Father</p><p>of Nanotechnology)</p><p>first introduced theidea of Nanotechnology</p><p>in a lecture called,</p><p>Theres plenty of</p><p>room at the bottom.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 9/28</p><p>In his time it was not possible to</p><p>manipulate single atoms or molecules, sohis speech was completely theoretical [2].</p><p>Feynman was an American Physicist, who</p><p>helped to develop the atomic bomb, andinvestigate the Space Shuttle Challenger</p><p>Disaster. He received the Nobel Prize in</p><p>Physics for his work on quantumelectrodynamics [3].</p><p>NO BODY PAID ANY ATTENTION AT THAT</p><p>TIME </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 10/28</p><p>The Lycurgus Cup</p><p>is a Roman</p><p>artifact frombefore 640 AD.</p><p>It is di-chroic,</p><p>changing colourwhen illuminatedfrom the inside. Thiseffect is caused bygold and silver nano-particles, and waslikely produced byaccident.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 11/28</p><p> Stained GlassAs early as 500 AD,</p><p>glass artisans were</p><p>making stained glass</p><p>windows with vibrant</p><p>reds and yellows.</p><p>These colors weremuch more luminous</p><p>and durable than dyes</p><p>could produce.</p><p>They were the products of</p><p>coinage metal nano-</p><p>particles imbedded in the</p><p>glass. </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 12/28</p><p>Synthesis Routes of Nanomaterial</p><p>(THE CHEMISTAPPROACH)</p><p>1. Bottom up method--</p><p>assemble atoms tonanostructures</p><p>a). Nanosphere lithography.</p><p>b). Templating, chemical,electrochemical,sonochemical, thermal andphotochemical reductiontechniques.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 13/28</p><p>Synthesis Routes of Nanomaterial</p><p> Nano Technology</p><p>Engineers/Physicists/M</p><p>aterial Scientists</p><p>2. Top down method--cutinto pieces in</p><p>nanoscale</p><p>a). Photolithography</p><p>b). Electron beam</p><p>lithography</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 14/28</p><p>Some Common Terminology In Nano</p><p>Material Technology</p><p>Carbon Nano Tube Carbon nanotube</p><p>are extraordinary</p><p>macromoleculescontaining only</p><p>carbon.</p><p> They are formed by</p><p>rolling up graphene</p><p>sheets.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 15/28</p><p>Nano particles</p><p>Nanoparticles</p><p>are made out</p><p>of a wide</p><p>variety of</p><p>materials such</p><p>as metals,</p><p>metal oxide</p><p>ceramics and</p><p>silicates.Figure 4.8b. Silicate</p><p>Nanoparticles. Source : ILL. </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 16/28</p><p>NanocapsulesNanocapsules</p><p>represent anynanoparticle that</p><p>consists of a shell and</p><p>a space in which</p><p>desired substances</p><p>may be placed. These</p><p>are reservoir systems</p><p>composed of apolymer membrane</p><p>surrounding a liquid</p><p>core .</p><p>Figure 4.9. Nanocapsules. Image</p><p>from: http://perso.club-</p><p>internet.fr/ajetudes/nano/inde</p><p>x.html </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 17/28</p><p>Nanocrystals</p><p>Nanocrystals are also</p><p>called quantum dots.</p><p>These are capable of</p><p>confining a single</p><p>electron, or a few, intodiscrete energy states</p><p>just as they would in an</p><p>atom. Nanocrystalsexhibit all the colours of</p><p>the rainbow due to their</p><p>unique semiconductor</p><p>qualities</p><p>a family of Qdot</p><p>particles (Source: MIT),</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 18/28</p><p>Dendrimers</p><p>Dendrimers are large and complex</p><p>molecules with very well-defined</p><p>chemical structures. From a polymer</p><p>chemistry point of view, dendrimers are</p><p>nearly perfect monodisperse</p><p>macromolecules with a regular and</p><p>highly branched three-dimensionalarchitecture (Figure 4.13). They consist</p><p>of three major architectural</p><p>components: core, branches and end</p><p>groups . One of the most appealingaspects of technologies based on</p><p>dendrimers is that it is relatively easy to</p><p>control their size, composition and</p><p>chemical reactivity .</p><p>Dendrimers. Sources: a)</p><p>California Institute of</p><p>Technology,</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 19/28</p><p>19</p><p>The Present Scenario Today the world faces a variety of challenges:</p><p> In creating alternative fuels, Searching for cheap new materials with 100%</p><p>selectivity, Reducing harmful by products inmanufacturing,</p><p> Cleaning up the environment and preventingfuture pollution,</p><p> Dealing with the cause of global warming, Protecting the common person from release</p><p>of toxic substances and infectious agents,</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 20/28</p><p>What will be the solution of all these</p><p>problems?</p><p> May be nanotechnology because it is the 21st</p><p>revolutionary technology.</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 21/28</p><p>APPLICATIONS</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 22/28</p><p>22</p><p>Materials: Stain Resistant Clothes</p><p> Nanofibers create cushion of air around fabric</p><p>10 nm carbon whiskers bond with cotton Acts like peach fuzz; many liquids roll off</p><p>Nano paints that refuseto stain;</p><p>Liquids bead up and</p><p>roll off</p><p>Nano-Care fabrics with water,</p><p>cranberry juice, vegetable oil, and</p><p>mustard after 30 minutes (left) and</p><p>wiped off with wet paper towel</p><p>ri ht </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 23/28</p><p>23</p><p>Environment: Paint That Cleans Air Nanopaint on buildings</p><p>could reduce pollution</p><p> When exposed toultraviolet light,titanium dioxide (TiO2)nanoparticles in paintbreak down organicand inorganicpollutants that wash off</p><p>in the rain</p><p> Decompose airpollution particles likeformaldehyde</p><p>Buildings as air purifiers? </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 24/28</p><p>24</p><p>Environment: Nano Solar Cells</p><p>Nano solar cells mixed in plastic could bepainted on buses, roofs, clothing</p><p> Solar becomes a cheap energy alternative!</p><p>Nano solar cell: Inorganic nanorods embedded in</p><p>semiconducting polymer, sandwiched between twoelectrodes</p><p>] 200 nm</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 25/28</p><p>Nano Sun-screens Nanoparticle</p><p>sunscreeningredients are smallinorganic clustersthat: Provide good UV</p><p>protection byabsorbing both highenergy UVB and lowenergy UVA light</p><p>Appear clear on ourskin because theyare too small toscatter visible light</p><p>25</p><p>Nanosized</p><p>ZnOparticles</p><p>Large ZnO</p><p>particles</p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 26/28</p><p>26</p><p>In Short: An emerging, interdisciplinary science</p><p>Integrates chemistry, physics, biology,materials engineering, earth science,and computer science</p><p> The power to collect data andmanipulate particles at such a tinyscale will lead to</p><p>New areas of research and technology</p><p>design</p><p>New ways to tackle important problemsin healthcare, energy, the environment,</p><p>and technology </p></li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 27/28</p><p>References</p><p> http://nanonet.rice.edu/intronanosci/sld005.html</p><p>1. http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03 </p><p> www.hindawi.com.</p><p>Fritz Allhoff Patrick Lin Nanotechnology &amp; Society</p><p> Current and Emerging Ethical Issues page 05</p><p> Introduction to nanotechnology by Henrik Bruus MICDepartment of Micro and Nanotechnology</p><p> Technical University of Denmark Lyngby, spring 2004 pageno. 1-10,50</p><p> A Nanoforum report, available for download fromwww.nanoforum.org.</p>http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03http://www.hindawi.com/http://www.hindawi.com/http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03http://www.nccr-nano.org/nccr/media/gallery/gallery_01/gallery_01_03</li><li><p>8/3/2019 Introduction &amp; Application of Nano-materials-part-1</p><p> 28/28</p></li></ul>