Formation of Silicon-Based Molecular Electronic Structures Using Flip-Chip Lamination

被引:36
作者
Coll, Mariona [1 ,4 ]
Miller, Lauren H. [1 ]
Richter, Lee J. [2 ]
Hines, Daniel R. [3 ]
Jurchescu, Oana D. [1 ]
Gergel-Hackett, Nadine [1 ]
Richter, Curt A. [1 ]
Hacker, Christina A. [1 ]
机构
[1] NIST, Div Semicond Elect, Elect Elect Engn Lab, Gaithersburg, MD 20899 USA
[2] NIST, Chem Sci & Technol Lab, Surface & Microanal Sci Div, Gaithersburg, MD 20899 USA
[3] Univ Maryland, Lab Phys Sci, College Pk, MD 20740 USA
[4] Univ Maryland, Dept Phys, College Pk, MD 20740 USA
基金
美国国家科学基金会;
关键词
SELF-ASSEMBLED MONOLAYERS; HYDROGEN-TERMINATED SILICON; ADSORBED MOLECULES; OXIDE SURFACES; JUNCTIONS; SPECTROSCOPY; DEPOSITION; SI; ALDEHYDES; GOLD;
D O I
10.1021/ja901646j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report the fabrication of molecular. electronic test structures consisting of Au-molecule-Si junctions by first forming a)omega-functionalized self-assembled monolayers on ultrasmooth Au on a flexible substrate and Subsequently bonding to Si(111) with flip-chip lamination by using nanotransfer printing (nTP). Infrared spectroscopy (IRS), spectroscopic ellipsometry (SE), water contact angle (CA), and X-ray photoelectron spectroscopy (XPS) verified the monolayers self-assembled on ultrasmooth Au were dense, relatively defect-free, and the -COOH was exposed to the surface. The acid terminated monolayers were then reacted with a H-terminated Si(111) surface using moderate applied pressures to facilitate the interfacial reaction. After molecular junction formation, the monolayers were characterized with p-polarized backside reflection absorption infrared spectroscopy (pb-RAIRS) and electrical current-voltage measurements. The monolayer quality remains largely unchanged after lamination to the Si(111) surface, with the exception of changes in the COOH and Si-O vibrations indicating chemical bonding. Both vibrational and electrical data indicate that electrical contact to the monolayer is formed while preserving the integrity of the molecules without metal filaments. This approach provides a facile means to fabricate high-quality molecular junctions consisting of dense monolayers chemically bonded to metal and silicon electrodes.
引用
收藏
页码:12451 / 12457
页数:7
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