The Study of Si Surface Structures Essay examples -- Science Experimen

The Study of Si Surface Structures The objective of this investigation is to decide the proportions of surface kind upon the Si test. Information is gathered from the Si tests utilizing SPALEED. By breaking down the information from dates where joined surfaces are available it is conceivable to decide the measure of particular sorts of surfaces present on the example. A definitive objective is the capacity to control the development of Pb islands upon the Si precious stone. Utilizations of this examination incorporate the structure of cutting edge chip and quantum wires. Presentation: The objective of the REU undertaking to which I was doled out is to decide the measures of particular sorts of crystalline surface structures present upon the Si precious stone that had been utilized in past tests including the development of Pb islands at low temperature. This is cultivated by breaking down specific parts of the information gathered by Spot Profile Analysis Low Energy Electron Diffraction (SPALEED). The informational collections are taken from various test runs including different surfaces and are contrasted with each other. These surfaces incorporate joined sorts of surface structures just as those with just a solitary surface structure present. Foundation and Experimental Procedure: Within ultra-high vacuum and at exceptionally low temperature, a Si precious stone is set. This gem is warmed by utilization of a tungsten fiber to high temperatures so as to take out polluting influences. The Si is then warmed again at specific temperatures and for explicit spans of time so as to make specific crystalline surface structures. Molecules of Pb are then saved upon the Si precious stone by a procedure of vanishing. The measure of Pb kept is known and is estimated as far as monolayers, or layers of Pb upon the surface measu... ...is known through past tests that the outside of the Si whereupon the Pb is stored can change the tallness of the Pb islands framed. By modifying the silicon surface whereupon the Pb is stored it is trusted that the Pb islands can be controlled. The expectation is that the work here can help make ready for PC chip engineering in the following fifty years. On the off chance that the Pb islands can be stored equitably and put in explicit areas it is accepted that they can be use as quantum wires, drastically speeding up the silicon chip PC. As of now the information is promising. With more information and further investigation the issues of controllable Pb island development make certain to be understood. The utilization of Scanning Tunneling Microscopy and SPA-LEED are the keys to opening the riddles of the Si surface and it’s association with the development of the Pb islands.