3 application of the quantum dots let me first

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3 Application of the Quantum dots: Let me first discuss how the quantum dots could be used in micro electronics. Suppose we produce an array of quantum dots using a grid of electrodes which divides the surface into squares about a tenth of a micron across [3]. A quick calculation shows that we could place ten billion of these on an area of one square centimeter [3]. If each one serves as a resonant tunneling transistor, performing the function of several conventional transistors, such a structure should have a capacity far in excess of the most powerful present- day supercomputer, and all this on a single chip [3]. . Figure1. Quantum dots colors as per nano scale. Quantum dots have applications in the biological world as flurescencent tags Quantum dots are nanometer-scale Nano crystals composed of a few hundred to a few thousand semiconductors atoms out of bio-inert materials meaning they are non intrusive and nontoxic to the body. Additionally, unlike fluorescent dyes (which tend to decompose and lose their ability to fluoresce), quantum dots maintain their integrity with standing more cycles of excitation and light emission before they start to fade. Changing their size or
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4 composition allows us to cater their optical properties- which means they are fluoresce in a multitude of color [4]. Interestingly enough, quantum dots can even be tuned to fluoresce in different colors with the same wavelength of light i.e. we can choose quantum dots size where the frequency of light required to make one group of dots fluoresce is an even multiple of the frequency required to make another group of dots fluoresce [4]; both dots then fluoresces with the same wavelength of light. This allows multiple tags to be tracked while using a single light source. Quantum dots are insoluble in water soluble. This is the main reason they are restricted in biological uses. To overcome this problem the quantum dots are coated with polymer layer [5]. This enables quantum dot to mix with water
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