A low-temperature sintered heterostructure solid film of coordination polymer nanoparticles: an electron-rectifier function based on partially oxidised/reduced conductor phases of Prussian blue
A low-temperature sintered heterostructure solid film of coordination polymer nanoparticles: an electron-rectifier function based on partially oxidised/reduced conductor phases of Prussian blue
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DOI：
10.1039/c5ra18678a
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发表时间：
2015-11
期刊：
影响因子：
3.9
通讯作者：
Kenta Ono;M. Ishizaki;Shinobu Soma;K. Kanaizuka;T. Togashi;M. Kurihara
中科院分区：
文献类型：
--
作者：
Kenta Ono;M. Ishizaki;Shinobu Soma;K. Kanaizuka;T. Togashi;M. Kurihara
表面改性的纳米颗粒（NPs）的油墨是用于制造薄膜电子器件的有前途的流体;然而，这样的NPs在功能上仍然彼此分离。因此，重建纳米粒子之间的电子通信一直是一个具有挑战性的课题，其纳米界面组装。在这里，我们证明了重建（烧结）的能力，表面改性普鲁士蓝（PB）和它的镍取代类似物（Ni-PBA）纳米粒子，导致多层电子功能。PB（底层）和Ni-PBA（顶层）NP的双层（DL）刚性固体膜已经通过旋涂技术使用它们的水油墨和在120 ° C和150 °C之间的低温烧结过程成功地制造在氧化铟锡（ITO）基底上，以固定旋涂的NP，而在异质结构DL界面上没有严重的失配。DL固体膜充当电子整流器装置，其完全特征在于具有最小纳米级厚度为20 nm的PB底层。在电子整流现象的机制，我们揭示了理论预测的部分氧化/还原导体相PB的外观。
Inks of surface-modified nanoparticles (NPs) are a promising fluid for fabricating thin-film electronic devices; however, such NPs are still functionally discrete from each other. Therefore, reconstituting electronic communication among the NPs has been a challenging subject for their nanoscale interfacial assembly. Here, we demonstrate the reconstitution (sintering) ability of surface-modified Prussian blue (PB) and its Ni-replaced analogue (Ni-PBA) NPs that lead to multilayer electronic functions. A double-layer (DL) rigid solid film of the PB (bottom layer) and the Ni-PBA (top layer) NPs has been successfully fabricated on indium-tin-oxide (ITO) substrates by a spin-coating technique using their water inks and a low-temperature sintering process between 120 and 150 °C to immobilise the spin-coated NPs without serious mismatch on the heterostructure DL interface. The DL solid films act as an electron-rectifier device, which is entirely characterised by a PB bottom layer with a minimum nanoscale thickness of ∼20 nm. In the mechanism of the electron-rectifier phenomenon, we reveal the appearance of theoretically predicted partially oxidised/reduced conductor phases of PB.