Edge-on Gating Effect in Molecular Wires

Abstract

This work demonstrates edge-on chemical gating effect in molecular wires utilizing the pyridinoparacyclophane (PC) moiety as the gate. Different substituents with varied electronic demands are attached to the gate to simulate the effect of varying gating voltages similar to that in field-effect transistor (FET). It was observed that the orbital energy level and charge carrier's tunneling barriers can be tuned by changing the gating group from strong electron acceptors to strong electron donors. The single molecule conductance and current-voltage characteristics of this molecular system are truly similar to those expected for an actual single molecular transistor.

Proton-triggered switch based on a molecular transistor with edge-on gate

“…1a ). 17 In this system, we took the advantage of the perpendicular orientation between the two aromatic planes and used the pyridine end of the moiety as the gating part of the wire attached with functional groups of different electronic demands. 18 , 19 Further studies by the scanning tunneling microscopy break-junction (STM-BJ) technique demonstrated that the single-molecule conductance, the orbital energy level, and the charge tunneling barrier of these molecular wires can be tuned by changing the electronic properties of the gating substituent group.…”

Molecular Design towards Controlling Charge Transport

“…Diphenyl-pyridinoparacyclophane-diphenyl molecular transistor (Copyright 2015, American Chemical Society). [13] conductance values to those measuredp reviously for neutral molecules. The protonation described herem arkedlyi ncreased electron-withdrawinga bility of the pyridine gating unit and by extension switching the charge-transport channel from HOMO to the LUMO leadingt os ignificantly reduced conductance.…”

“… Diphenyl–pyridinoparacyclophane–diphenyl molecular transistor (Copyright 2015, American Chemical Society) …”

“…At ransistor is essentially at hree-terminal device with its source and drain terminia tt he opposite ends of as emiconductingl ayer,b oth of which are electrically insulated from the gate terminal by employing an additional dialectic layer.T o mimic transistor architecture at the molecular scale, Yu developed ad iphenyl-pyridinoparacyclophane-diphenyl compound as shown in Figure 7. [13] Here, the anchoring TMSE thiol groups on the opposite ends of the semiconducting pentaphenylene backbonef unctioned as the source and drain, while cyclophane pyridine served as the gate. The pyridine gate was electrically insulated from the semiconducting backboneb yt he double bonds in cyclophane acting as the dielectric component.…”

Высокая Подвижность Носителей Заряда В Молекулярных Каналах Полианилина В Нанозазорах Между Углеродными Нанотрубками

“…Одним из базовых элементов молекулярной наноэлек-троники является одномолекулярный транзистор, в ко-тором проводимость осуществляется через одиночную органическую молекулу (или малую группу таких мо-лекул) [2][3][4]. Ключевой проблемой в данных структурах является формирование наноразмерных контактов сто-ка и истока в совокупности с затворным электродом для возможности исследования полевого управления канала.…”