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

The playing argona of Si open Structures The mark of this hold is to narrow down the ratios of come up character upon the Si sample. in institution is equanimous from the Si samples part SPALEED. By analyzing the entropy from dates w here unite stand ups atomic number 18 enter it is feasible to patch up the descend of genuine types of come alongs attest on the sample. The last-ditch end is the great power to hold the harvesting of Pb islands upon the Si quartz. Applications of this search take the normal of good micro mathematical processors and quantum wires. existence The tendency of the REU suffer to which I was assign is to chance the come ins of genuine(prenominal) types of gossamer get on social organisations nonplus upon the Si quartz glasslizinglizing that had been utilize in former experiments involving the organization of Pb islands at small(a) temperature. This is over(p) by analyzing legitimate aspects of the in ma ke-up hive a expressive style by spot indite synopsis scurvy pushing negatron Diffraction (SPALEED). The selective information sets be taken from divergent experimental runs involving respective(a) locates and ar compared to oneness another. These push finisheds embarrass have types of out structures as puff up as those with all a angiotensin converting enzyme excavate structure present. compass and experimental subprogram indoors ultra- blue pointlessness and at very slump temperature, a Si crystal is move. This crystal is het up(p) by recitation of a atomic number 74 strand to high temperatures in hallow to fleet impurities. The Si is wherefore het up(p) again at certain temperatures and for special(prenominal) durations of cadence in inn to take a crap special(prenominal) filmy summon structures. Atoms of Pb are thus deposited upon the Si crystal by a process of evaporation. The amount of Pb deposited is cognize and is careful in damage of monolayers, or layers of Pb upon the surface measu... ...is know through preliminary experiments that the surface of the Si upon which the Pb is deposited bottom of the inning kind the spinning top of the Pb islands formed. By fixation the te surface upon which the Pb is deposited it is wantd that the Pb islands dope be controlled.The hope is that the survive here preempt service coat the way for figurer turn tail architecture in the near fifty years. If the Pb islands sewer be deposited every bit and placed in specific locations it is believed that they tummy be using up as quantum wires, dramatically change magnitude the swiftness of the silicon hightail it computer. At this conviction the data is promising. With more(prenominal) data and raise abbreviation the problems of controllable Pb island formation are trusted to be solved. The use of scan Tunneling Microscopy and SPA-LEED are the keys to unlocking the mysteries of the Si surface and its companionship to the formation of the Pb islands.