Details

Autor(en) / Beteiligte

• Kong, Gyu Don
• Kim, Miso
• Cho, Soo Jin
• Yoon, Hyo Jae

Titel

Gradients of Rectification: Tuning Molecular Electronic Devices by the Controlled Use of Different-Sized Diluents in Heterogeneous Self-Assembled Monolayers

Ist Teil von

• Angewandte Chemie (International ed.), 2016-08, Vol.55 (35), p.10307-10311

Auflage

International ed. in English

Ort / Verlag

Germany: Blackwell Publishing Ltd

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Molecular electronics has received significant attention in the last decades. To hone performance of devices, eliminating structural defects in molecular components inside devices is usually needed. We herein demonstrate this problem can be turned into a strength for modulating the performance of devices. We show the systematic dilution of a monolayer of an organic rectifier (2,2′‐bipyridine‐terminated n‐undecanethiolate) with electronically inactive diluents (n‐alkanethiolates of different lengths), gives remarkable gradients of rectification. Rectification is finely tunable in a range of approximately two orders of magnitude, retaining its polarity. Trends of rectification against the length of the diluent indicate the gradient of rectification is extremely sensitive to the molecular structure of the diluent. Further studies reveal that noncovalent intermolecular interactions within monolayers likely leads to gradients of structural defect and rectification. Rectifying defects: A detailed study of the electrical behavior of binary surface‐assembled monolayers (SAMs) composed of an organic rectifier, SC11BIPY, and non‐rectifying n‐alkanethiolate diluents shows that the gradient behavior of rectification can be finely tuned by controlling the structure (specifically, the molecular length) of the diluent.