A review of self-assembled monolayers as potential terahertz frequency tunnel diodes

作者：Celestin Michael; Krishnan Subramanian; Bhansali Shekhar; Stefanakos Elias; Goswami D Yogi^*

来源：Nano Research, 2014, 7(5): 589-625.

DOI：10.1007/s12274-014-0429-8

• SAM/self-assembly
• quantum tunneling
• molecular rectification
• IR detection
• rectenna

In this review, we describe the principles of the tunnel junction, self-assembled monolayer (SAM) application techniques, experimental testbed fabrication, and characterization of the films and devices. In addition, techniques for directed application, removal, and functionalization of the monolayers are discussed. Bottom-up fabrication techniques have seen increased attention because of their versatility and ease of use. These films see mechanical uses as surface modifiers and micro-scale lubricants. Advances in nanowatt electronics and ultra-low power sensors have opened up an energy harvesting niche for solutions which would have proven ineffective just some years ago. The focus of this study is the two-terminal junction which has potential applications in THz rectification for energy harvesting, medical imaging, and defense sensing. The quantum theory of operation behind these devices is touched on briefly-describing tunneling through the organic monolayers. Commentary on trends in research and potential future work are presented as well.

• 出版日期2014-5