2013年8月29日星期四

enough for us to be processed

They have not found a good way to grow molybdenum disulfide, many try to get the material structure is also inconsistent with the chemical vapor deposition method create molybdenum disulfide particles too small to have useful electrical properties.  But in the new approach, they noted molybdenum disulfide "islands" formed in the furnace is easy , blemishes and even dirt block will appear in the base of the furnace .  Rice University graduate Niina ? Naye Mei said: " with hexagonal boron nitride or graphene is different, molybdenum disulfide difficult nucleation .  However, we found that by adding artificial edge toward the base , you can control the nucleation process , and, in between these structures , molybdenum plating disulfide grow better . new method be grown particles is about 100 microns , within the nanometer scale , enough for us to be processed .  "
Oak Ridge National Laboratory 's team used aberration-corrected scanning transmission electron microscopy to the atomic structure of this new material imaging in order to clearly see individual atoms and changing the electrical properties of the material defects .  The laboratory Juan - Carlos ? Eddie Robb said: " In order to improve the properties of two-dimensional material , first understand how they are put together is very important .Oak Ridge National Laboratory microscope equipment so that we can see for the first time the material of the individual atoms .  "
Rice University researchers estimate that these substances together so there are many ways , not only can be used in the form of two-dimensional layer can also be used in the form of three-dimensional stack .  Lou Jun said: "' natural crystal ' by the same ingredients together via van der Waals force , and now we can use different ingredients to create a three-dimensional crystal . These different materials have different electrical properties and band gap, the another kind of material placed on top so that we can obtain a new material - we called van der Waals solids  we expect to use any stacking order put it together, it may be within the field of materials science a new method .

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