This enables quantum dot to mix with water figure 2

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with polymer layer [5]. This enables quantum dot to mix with water Figure 2. Quantum dots coating. Quantum dots are also used to detection the behavior of the cells which cause breast cancer a burning problem in the present day world. Using this technology scientist are planning to find the properties of the cancer cells so that they can make a nano drug that can cure the infected part of the cell [5].
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5 Figure 3. Quantum dots attached to breast cancer cells. Another application of quantum dots is in deoxyribonucleic acid (DNA). DNA is the nucleic acid carrying the genetic blueprint of all forms of cellular life [1]. The double helix structure of DNA is shown in figure. We can map our DNA using Quantum dots. DNA can be attached to gold or silver nanodots (14nmwide) that are suspended in a liquid [1]. Each gold particle has the same base pair- but when a linker (such as Anthrax DNA) is introduced, the gold particles form larger clusters, which change their optical properties as shown in Figure 4. Figure 4. DNA structure.
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6 Here particle size indicates the wave length of the light, hence color. Imagine with out the linker, the liquid looks purple; with the linker however looks red- providing a quick macroscopic analysis. Because of this color change, these are called colorimetric sensors [3]. The type of DNA damage is not repaired by a single protein. “In these types of processes there are likely multiple proteins that come into play. So, one of the current challenges is observing this complex process happening in a live cell in real time. This can be done using quantum dots technique [3]. Application of Quantum dots flour dyes These are used in Oligonucleotides can be successfully couples to molecular beacons which can serve as basis for DNA, RNA assay [3] Flowcytometry application as recorders by emitting multiple laser sources of conventional flow cytometers so that we can reduce cost of cytometer system [3].
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