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Surface Chemistry Special Feature: Imprinting self-assembled patterns of lines at a semiconductor surface using heat light or electrons

机译:表面化学的特殊功能:利用热光或电子在半导体表面上印制自组装的线条图案

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摘要

The fabrication of nano devices at surfaces makes conflicting demands of mobility for self-assembly (SA) and immobility for permanence. The solution proposed in earlier work from this laboratory involved pattern formation in physisorbed molecules by SA, followed by localized reaction to chemically imprint the pattern substantially unchanged, a procedure we termed molecular-scale imprinting (MSI). Here, as proof of generality we extended this procedure, previously applied to imprinting circles on Si(111)-7 × 7, to SA lines of 1-chloropentane (CP) on Si(100)-2 × 1. The physisorbed lines consisted of pairs of CP that grew perpendicular to the Si dimer rows, as shown by scanning tunneling microscopy and ab initio theory. Chemical reaction of these lines with the surface was triggered in separate experiments by three different modes of energization: heat, electrons, or light. In all cases the CP molecules underwent MSI with a Si atom beneath so that the physisorbed lines of CP pairs were imprinted as chemisorbed lines of Cl pairs.
机译:在表面上制造纳米器件使得自组装(SA)的移动性和永久性的移动性需求相互矛盾。该实验室在较早的工作中提出的解决方案涉及通过SA在物理吸附的分子中形成图案,然后进行局部反应以化学方式将图案基本不变地压印,我们称此方法为分子规模压印(MSI)。在这里,作为一般性的证明,我们将此程序扩展到了以前应用于Si(111)-7×7上的圆印,再扩展到Si(100)-2×1上的1-氯戊烷(CP)的SA线。垂直于Si二聚体行生长的CP对的数量,如扫描隧道显微镜和从头算理论所示。这些线与表面的化学反应是在单独的实验中通过三种不同的通电方式触发的:热,电子或光。在所有情况下,CP分子都经过MSI并带有一个Si原子,因此CP对的物理吸附线被刻印为Cl对的化学吸附线。

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