Page 1 of 3 - About 26 Essays
  • Naocrystal Thin Film Transistors Lab Report

    some stabilizing organic molecules, broadly termed as surfactants, which are bulky and insulating ligands. The individual NCs in the thin film are indeed separated by these ligands, which significantly inhibit the charge transport. One of the simple yet effective ways to enhance the electrical performance of NC TFTs is the ligand exchange approach,2,3 replacing the long, insulating native ligands by short and more conductive molecules.1–6 Another way to decrease the inter distance, while keeping the NC size the same, is to anneal the NC solid at temperatures well below the melting temperature of NC cores.7 Metal oxide semiconductors have been intensively investigated for applications in electronics. Among many metal oxide semiconductors, indium oxide (In2O3) has been considered as a promising material for TFT applications owing to its wide band gap (3.6–3.75 eV) and excellent single crystal mobility (160 cm2/V.s).8,9 While the fabrication of In2O3 TFTs using the precursor-approach9–11 and NC TFTs of zinc oxide (ZnO)-based has been well investigated,12,13 the fabrication of In2O3 TFTs via the NC-approach (In2O3 NC TFTs) has been rarely investigated. Recently, we demonstrated the first solution-processed In2O3 NC TFTs.14,15 In2O3 NC TFTs are considered promising for device configuration to realize high-performance TFTs. Our Lab has investigated short organic ligands such as β-alanine, benzoic acid, 4-aminobenzoic acid, and 2-aminopyridine for semiconducting oxide NC to…

    Words: 925 - Pages: 4
  • Synthesis Of L-Ion Battery

    new electrode materials for rechargeable LIBs have undergone a drastic shift toward to nanomaterials.13–20 Bulk material are generally considered to possess sluggish lithium ion and electron diffusion. In contrast, nanomaterial-sized LIBs practically have been demonstrated to be efficient to favor both power rate and cycle life and furthermore lead to unusual lithium reaction mechanism. Many types of metal oxide nanocrystals (NCs) and nanoparticles (NPs) as high-energy-density anode materials…

    Words: 1257 - Pages: 6
  • Benzenethiol Ligand Study

    anhydrous ethanol (1:4 volume ratio) by centrifugation (10,000 rpm, 10 min), Finally, the benzenethiol-capped QDs were dispersed in hexane at 10 mg/mL. Synthesis of ZnO NPs ZnO nanoparticles (NPs) were synthesized from zinc acetate dehydrate and tetramethyl-ammonium hydroxide (TMAH) for electron transfer layers. TMAH in ethanol was dropped at a rate of 1mL/min into 0.1 M zincacetate dihydrate in dimethyl sulfoxide (DMSO), and this solution was stirred for an hour at 4 °C. The ZnO nanoparticles…

    Words: 985 - Pages: 4
  • Hot Tin Essay

    The above graph shows temperature of Sn0.3Ag0.7Cux In alloy as a function of indi-um weight percentage. Initially with no traces of Indium, the solidus temperature & liquidus temperature are 219.40̊C and 241.70̊C. It clearly shows that the temperature range goes wider as the concentration of indium is increased [6]. This is not a cost effective solution as indium is very costly. Titanium oxide nano particles addition led to temperature changing from 217 to 217.64 degree Celsius [7]. Zinc oxide…

    Words: 1256 - Pages: 6
  • Advantages And Disadvantages Of Resistive Touch Screen

    As you will come to find out, resistive touch screens are the most preferred option in businesses, simply because they are more reliable than others. The mechanism behind resistive touch screen In order to operate, resistive touch screens make use of a pressure detector. The work of this pressure detector is to sense when the screen is touched under pressure. Once the detector senses this pressure, it goes on to carry forward the appropriate action. The resistive touch screen itself consists of…

    Words: 910 - Pages: 4
  • Importance Of Mineral Resources

    Indium, gallium and platinum resources are diminishing quickly and will soon be gone due to rapid development of technology. For example, Indium is used in production of LCD screens and is expected to only last around 32 years, according to US data. In addition, gallium and platinum which is being used for solar power and fuel cells respectively are said to experience the same things. Without proper management during these minerals extraction, and lack of substitute substance development, the…

    Words: 946 - Pages: 4
  • Solar Cells Advantages And Disadvantages

    arsenic, cadmium, copper, indium, gallium, and selenium), may result in worker breathing problems. If cutting and scribing operations are not properly controlled through process enclosure and/or ventilation, airborne metal dusts have the potential to settle on to equipment, work surfaces and floors creating a potential cross-contamination issue as well as breathing intake hazard to workers. • Nanoparticles used in PV manufacturing Quantum dots floating in ink, nano wires, and silver cells are…

    Words: 1112 - Pages: 5
  • Analysis Of Gallium And Arsenic Distances

    exposed to an effusion chamber is calculated. Based on the area of the substrate, the pressure in the chamber and the molecular weight of the species, the shutter time is calculated to ensure the desired thickness of the film which will be adsorbed on to the substrate. For example, when using two semiconductors with similar lattice constants, such as InAs and GaAs, a quantum well can be fabricated in roughly three stages. In the first stage, the Gallium and Arsenic chambers are opened for a…

    Words: 772 - Pages: 4
  • Statement Of Purpose In Electrical, Computer And Energy Engineering

    about my other interested areas, I would like to name computer engineering specially nanotechnology. I believe with the use of my analytical skill and patience I can carry out useful researches in these areas. I know that career in research and academics requires a high level of aptitude, unwavering commitment and a lot of sacrifice. I also believe that I would meet all of the mentioned qualities and would try to be an asset to your prestigious university. The Department of Electrical and…

    Words: 1057 - Pages: 5
  • Solubility

    mixing both solutions, which produces a clear solution. The solvent evaporated at inlet 110°C and outlet 60°C, feed pump speed 10 ml per minute and aspiration 45%. The spray-dried mixture of drug with HPMC K3LV was obtained in 20–30 min, and it is denoted as SHPD.  Solid Mixture Characterization Differential Scanning Calorimetry: Analyses of samples were carried out on DSC (Universal V2. 4F TA Inc., USA) instrument. Samples weighing between 1 and 10 mg were loaded into open aluminum pan and…

    Words: 1984 - Pages: 8
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