From an Organometallic Monolayer to an Organic Monolayer Covered by Metal Nanoislands: A Simple Thermal Protocol for the Fabrication of the Top Contact Electrode in Molecular Electronic Devices
From an Organometallic Monolayer to an Organic Monolayer Covered by Metal Nanoislands: A Simple Thermal Protocol for the Fabrication of the Top Contact Electrode in Molecular Electronic Devices
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DOI：
10.1002/admi.201400128
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发表时间：
2014-12-01
影响因子：
5.4
通讯作者：
Cea, Pilar
中科院分区：
文献类型：
--
作者：
Ballesteros, Luz M.;Martin, Santiago;Cea, Pilar
在这一贡献中，提出了一种用于制造金属/有机单层/金属器件中的顶接触电极的新方法。该过程涉及有机金属化合物的热诱导分解，简称TIDOC方法。含有金属有机化合物(MOCs)[[4-{(4-羧基)乙炔}苯基]乙炔]-(三苯基膦)-金，1，或[1-isocyano-4-methoxybenzene]-[4-amino-phenylethynyl]-gold，2的单分子膜在中温(1：150℃，2：100℃，2小时)下进行热处理，导致Au-P或Au-C键断裂，Au(I)还原为Au(0)，形成金属金纳米颗粒(GNP)。这些颗粒分布在薄膜表面，形成了金属/分子/GNP夹心结构。通过用导电原子力显微镜记录I-V曲线来确定这些新生器件的电学性质。从这些金属/有机单层/GNPs夹心结构中收集的I-V曲线是典型的金属-分子金属结，在很大范围的设定点力范围内没有观察到具有金属短路特征的低阻痕迹。因此，TIDOC方法是制造分子电子学新兴领域中分子结的一种有效方法。
In this contribution, a novel method for practical uses in the fabrication of the top contact electrode in a metal/organic monolayer/metal device is presented. The procedure involves the thermally induced decomposition of an organometallic compound, abbreviated as the TIDOC method. Monolayers incorporating the metal organic compounds (MOCs) [[4-{(4-carboxy) ethynyl} phenyl] ethynyl]-(triphenylphosphine)-gold, 1, or [1-isocyano-4-methoxybenzene]-[4-amino-phenylethynyl]-gold, 2, were annealed at moderate temperatures (1: 150 degrees C for 2h and 2: 100 degrees C for 2 h), resulting in cleavage of the Au-P or Au-C bond and reduction of Au(I) to Au(0) as metallic gold nanoparticles (GNPs). These particles are distributed on the surface of the film resulting in formation of metal/molecule/GNP sandwich structures. Electrical properties of these nascent devices were determined by recording I-V curves with a conductive-AFM. The I-V curves collected from these metal/organic monolayer/GNPs sandwich structures are typical of metal-moleculemetal junctions, with no low resistance traces characteristic of metallic short circuits observed over a wide range of set-point forces. The TIDOC method is therefore an effective procedure for the fabrication of molecular junctions for the emerging area of molecular electronics.