分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-04-06
摘要: Metal-organic frameworks (MOFs), which are formed by association of metal cations or clusters of cations ("nodes") with soft organic bridging ligands ("linkers"), are a fascinating class of flexible crystalline hybrid materials offering potential strategy
分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-05-02
摘要: Metal-organic frameworks (MOFs), which are formed by association of metal cations or clusters of cations (“nodes”) with soft organic bridging ligands (“linkers”), are a fascinating class of flexible crystalline hybrid materials offering potential strategy for the construction of flexible electronics. In this study, a high-quality MOF nanofilm, HKUST-1, on flexible gold-coated polyethylene terephthalate substrates is fabricated using liquid phase epitaxy approach. Uniform and reproducible resistive switching effect, which can be sustained under the strain of as high as 2.8%, and over the wide temperature range of –70 to +70 °C, is observed for the first time in the all solid-state Au/ HKUST-1/Au/ thin film structures. Through conductive atomic force micro- scopic and depth-profiling X-ray photoelectron spectroscopicanalysis, it is proposed that the electric field-induced migration of the Cu2+ ions, which may lead to subsequent pyrolysis of the trimesic acid linkers and thus the formation of highly conducting filaments, could be the possible origin for the observed uniform resistance switching in HKUST-1 nanofilms.
分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-05-02
摘要: Thermally stable poly(triphenylamine) (PTPA) synthesized by an oxidative coupling reaction is used as the functional layer in memory devices, which exhibit non-volatile bistable resistive switching behavior with a large ON/OFF ratio over 5 108, a long retention time exceeding 8 103 s and a wide working temperature range of 30–390 K.