Synthesis of stable ultra-small Cu nanoparticles for direct writing flexible electronics
Synthesis of stable ultra-small Cu nanoparticles for direct writing flexible electronics
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DOI：
10.1016/j.apsusc.2013.11.057
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发表时间：
2014-01-30
影响因子：
6.7
通讯作者：
Chen, Minfang
中科院分区：
文献类型：
--
作者：
Li, Wei;Chen, Minfang
在这项研究中，纯铜纳米粒子（NPs）已成功地合成和铜纳米墨水制备直接书写在照片纸上使用的滚筒笔。柠檬酸三钠作为初始还原剂和表面活性剂，肼作为第二大还原剂，十六烷基三甲基溴化铵（CTAB）作为额外的表面活性剂。从XRD、TEM和HR-TEM分析，证实合成的颗粒是球形的Cu，尺寸范围为2.5 +/- 1.0 nm。通过分析FT-IR光谱和TGA曲线，发现所获得的颗粒被柠檬酸三钠和CTAB层覆盖，在高达228 ℃的温度下对氧化是稳定的。Cu纳米颗粒的尺寸减小和空气稳定性增强导致烧结后颗粒密度提高，这主要是Cu图案导电性增加的原因。在Ar中在160 ℃下烧结2小时的Cu图案的电阻率为7.2 +/- 0.6 μ Ω cm，这是体Cu电阻率的4.40倍。所绘制的Cu线表现出优异的完整性和良好的导电性，这是实验测试。此外，成功地制作了Cu电极和样品RFID天线。(C)2013年爱思唯尔B。V.保留所有权利。
In this study, pure Cu nanoparticles (NPs) have been successfully synthesized and the Cu nano-ink was prepared for direct writing on photo paper using a roller pen. The tri-sodium citrate was used as initial reducing-cum-surfactant agent followed by hydrazine as a second massive reducing agent and cetyltrimethylammonium bromide (CTAB) as extra surfactant agent. From the XRD, TEM, and HR-TEM analyses, the synthesized particles are confirmed to be Cu in spherical shape with sizes range of 2.5 +/- 1.0 nm. By analyzing the FT-IR spectroscopy and TGA curves, it was found that the obtained particles capped with tri-sodium citrate and CTAB layers are stable to oxidation up to the temperature 228 degrees C. The reduced size and enhanced air-stability of the Cu NPs result in an improved particle density upon sintering, which is mainly responsible for the increased conductivity of the Cu patterns. The resistivity of Cu patterns sintered in Ar at 160 degrees C for 2 h is 7.2 +/- 0.6 mu Omega cm, which is 4.40 times the bulk Cu resistivity. The drawn Cu lines exhibited excellent integrity and good conductivity, which were experimentally tested. Moreover, a Cu electrode and a sample RFID antenna were successfully made. (C) 2013 Elsevier B. V. All rights reserved.