ساخت، مشخصه يابي و بهينه سازي خواص الكتريكي و نوري سازه نانو ليفي طلا

چكيده انگليسي :

Manufacturing characterizing and optimizing the electrical and optical properties of gold nanofiber network Boshra Aliakbarian b aliakbarian@tx iut ac ir Date of submission 2018 01 14 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSuperviser Dr Dariush Semnani d semnani@cc iut ac irAbstractIn the last few decades newly electrical devices has largely developed including solar cells LEDs screens and touch screens that require transparent and conductive electrodes TCEs The firstmaterial that used in this field was tin oxide ITO which is both a suitable material and also hasgood mechanical stability and establishes a logical connection between resistance and transparencyand therefore ITOs are usable in Commercial TCEs Despite these advantages ITO has somedisadvantages that researchers has always been looking for an alternative for it 75 of ITO iscontained with Indium Indium is an almost rare metal Indium is a minor component in zincsulfide ores and is produced as a byproduct of zinc refinement resulting in limited access to indium andincreases its price On the other hand this material is fragile and also has the potential for crackingduring manufacturing process transportation and assembly ITO could not be used in flexible devicessuch as flexible substrates and electrical skins In the presence of salts or acids the longevity of thissubstance decreased Another issue is its high refractive index which leads to unwanted reflectionin the layers Substances that have been introduced as ITO substitutes are nanostructured materials includingcarbon nanotubes CNTs grapheme metal Nano wires and conductive polymers each of thissubstances also have with various problems Graphene and carbon nanotubes have costly and time consuming manufacturing methods and metal nano wires also create high resistance at the wire bonding points Another alternative for ITO is the production of a thin web of Nano fibers and thenmake this material conductive In this study by using electro spinning process a homogeneous webis manufactured then by using of IVD process or gold coating on the sample transparent electrodethat can be transmitted over a variety of substrates achieved The applied variables were the concentration of the electro spinning solution and the electro spinningperiod which was tested by the RSM method and then analyzed The advantages of this productionmethod include the ability to produce on a high scale the ability to change the transparency andresistance in wide area dependent on application substrate change and flexible substrate selection low production cost comparing to ITO and its long life span As stated above the two main factorsof transparent and conductive electrodes are surface resistance and transparency percentage of lighttransmission In this research the results of the resistance and transparency of the samples are veryacceptable so that the average resistance is about 400 and the light transmission rate is 84 Keywords Transparent Electrode Conductivity Surface Resistance Flexibility IVD process

علي اكبريان، بشري

ساخت، مشخصه يابي و بهينه سازي خواص الكتريكي و نوري سازه نانو ليفي طلا

الكترود شفاف , رسانايي , مقاومت سطحي , انعطاف پذيري , فرآيند تبخير حرارتي يوني