Study of Molecular Patterns in the Field Emission Microscope
Study of Molecular Patterns in the Field Emission Microscope
复制标题
场发射显微镜中分子模式的研究
DOI：
10.1063/1.1744651
复制
发表时间：
1958
影响因子：
4.4
通讯作者：
E. Müller
中科院分区：
文献类型：
--
作者：
A. Melmed;E. Müller
当尖端温度降低时，有机染料分子（例如酞菁或黄烷烯）的场致发射图案显示出更高的稳定性。生产典型的四联体或双联体图案不需要事先污染或堆积。在加热或离子轰击后，分子图案可能会以几个不同的尺寸和强度步骤消失。平均而言，必须有 13 个酞菁分子或 2 个黄烷烯分子撞击尖端才能产生一种图案。这些观察结果表明，此处研究的物质蒸发并以由两到六个分子组成的聚合单元形式到达尖端。提出了一种图像形成机制。
Field emission patterns of organic dye molecules such as phthalocyanine or flavanthrene show improved stability when the tip temperature is lowered. No prior contamination or buildup is necessary for the production of typical quadruplet or doublet patterns. Upon heating or ion bombardment the molecule patterns may disappear in several distinct steps of size and intensity. On the average 13 phthalocyanine or 2 flavanthrene molecules must strike the tip to produce one pattern. These observations suggest that the substances studied here evaporate and arrive at the tip as polymerized units consisting of two to six molecules. A mechanism for image formation is proposed.