Quantum dot

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    Quantum Dots Essay

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    Nano-dots in Mammalian Gametes Imagining1 The Nano-dots, or Quantum Dots (QD), are nano-scale semiconductor devices with diameter up to 10nm, which were first discovered in 1980s2. Once stimulated, they give emission of light with specific colours, which is then visualised1-3. These nano particles have high size-tunability, once illuminated, different emission wavelength can be obtained by manipulating the size of dots3. Inorganic QDs are made up of two components, an atom-cluster core with selenium or cadmium, and a shell made of inorganic materials. The inorganic shell has ability to cross-link with larger organic particles such as peptides and DNA, assuring their application in biotechnical field, such as biological tags and bio-imaging sources2. Because of their high extinction coefficient, quantum dots also have intensive application in optical-related industry, such as in solar cell and photodetector devices2. Once attached on specific proteins, quantum dots become an effective tool in bioluminescence imaging3. The migration of target cell or protein can be tracked, providing valuable information in embryology, physiology and pharmacokinetics field3. A number of biomedical researches have applied this technology, such as cancer study and Parkinson’s diseases study. Large amount of information can be obtained through…

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    Introduction Quantum dots (Q-Dots) is very small semiconductor particles that means it can be either conductors or resist electricity depending on the temperature and purity of the semiconductor. Q-dots range in size from 2-10 nm, so because of their small size, quantum mechanics governs the physics of the particles. The synthesis Q-Dots were first studied in 1982 by Efros and Ekimov, and then many developments have reported the synthesis of semiconductor nanoparticles.1 Q-Dots have unique…

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    Benzenethiol Ligand Study

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    In this study, the effect of benzenethiol ligand on CdSe/ZnS core/shell quantum dots was investigated. Conventional long-chain oleic acid (OA) and trioctylphosphine (TOP) capping ligands were partially replaced by short benzenethiol ligands, and the improvement in the luminescence performance was observed in quantum dot light emitting diodes (QD-LED). Approximately 1.8 fold improvement was achieved for both the maximum luminance and maximum current efficiency for the QD-LEDs fabricated with…

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    Key Test Learning Test

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    How do you administer the items? - The child draws a line from the black dot to the gray dot. Further instructions are given once there are multiple starting points (i.e., more than one black dot) or there are no dots at all to follow – these instructions are given on the second page of the test where the examinee is reminded of the initial instructions and is told that for items with no dots, they can start anywhere. Individual items are not timed – the entire test is timed. 7. Basal rule - If…

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    never seen before but it reminded him of something he saw earlier when he was looking at the latest alien U.F.O sightings. Tom couldn’t believe his eyes. Was it real? In a hurry Tom rushed over to Dots Donuts where the U.F.O was hovering over. There was this bright green human-like figure standing in front of the shop. “Who dare passes?” The screechy voice startled Tom. “I uh I.” Tom stammered. He saw another figure run out of the door, but this was no alien. “Help me! Help! Please!” No way…

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    I: Introduction / Overview Proposed Enterprise-Wide Computing Solution A small publishing company consisting of fifty employees located on a single floor with glass cubicles has many things to consider when contemplating the computing needs of its employees. The first question that would need to be addressed would be are employees going to work strictly in the office or will employees also be required to work remotely from home and customer locations. Answering this question will help us…

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    Furthermore, each year, the U.S. government only issues 65,000 new H-1B visa, which is a small portion of the total number of applicants who apply. In recent years, “USCIS instituted a “lottery” system for accepting applications because more than 65,000 regular H-1Bs were received on the first possible day of filing”. This process is entirely random, and any qualified international student can be turned down because of mere chance. The fact that the number of applicants far exceeds the number of…

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    2.2.2 How the bubble engorged The booming market formed a strong belief that there existed a strong new economy which was untouched by instabilities and crisis so that analysis of financial data was irrelevant. “Dot-com” business were flooded, many of which were start-ups by new grads and inexperienced entrepreneurs, who did not have a clear vision, strategy, knowledge, earnings or financial planning. A clear indication of the bubble was NASDAQ index, which had skyrocketed from 600 points in…

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    TERM PAPER: DOT.COM BUBBLE vs RAILWAY MANIA INTRODUCTION Our world has suffered numerous economic crisis ever since we had a concept of money. One may argue that economic crisis and economic growth go hand-in-hand. A very frequent source of economic crisis are speculative bubbles which essentially tailspin our economy into a euphoric state. They fill our investors with irrational exuberance, and coax them to go on an expensive investing spree. This goes on until the speculative behaviour…

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    Immigrant Job Essay

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    In the current business environment globalization has led to organizations to hire foreign citizens and even to operate in foreign nations to help in expansion of the businesses. However, there are requirements for a foreign citizen to work in the stated country which are stated in the labor laws. One of the requirements for such is for the individual to have a visa that will help him to be allowed in the company that hew hired. In the US the H-1B visa is required for the foreign individual to…

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