CN105081350A - 一种新型长径比均匀的有节点银纳米线的制备方法 - Google Patents

一种新型长径比均匀的有节点银纳米线的制备方法 Download PDF

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CN105081350A
CN105081350A CN201510645719.5A CN201510645719A CN105081350A CN 105081350 A CN105081350 A CN 105081350A CN 201510645719 A CN201510645719 A CN 201510645719A CN 105081350 A CN105081350 A CN 105081350A
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刘碧桃
李璐
金容�
陈善勇
黎军军
闫恒庆
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Chongqing University of Arts and Sciences
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Abstract

本发明提供了一种新型长径比均匀的有节点银纳米线制备方法。将分散剂溶解于三元醇中配置成黏稠透明溶液,然后将硝酸银溶解于三元醇中配置成透明溶液,再将硝酸银溶液转入分散剂溶液中混合均匀,最后将混合溶液转移至反应釜中,再放入设定温度(170~200℃)的烘箱保温一段时间结束反应。将Ag纳米线的母液用酒精稀释后离心分离有机物,得到新型长径比均匀、有节点的Ag纳米线。本发明制备新型长径比均匀的有节点银纳米线的方法简单,易操作。

Description

一种新型长径比均匀的有节点银纳米线的制备方法
技术领域
本发明涉及Ag纳米线的制备方法,特别是一种新型长径比均匀的有节点银纳米线制备方法。
背景技术
纳米线具有在横向上被限制在100nm以下的一维结构,典型的金属纳米线的长径比在1000以上。银纳米线具有良好的导电性,透光性和耐屈挠性等特点,实现柔性透明导电薄膜成为可能。通过研究学者的努力,银纳米线的制备方法已经累积了很多,如模板法,水热法,自组装法,多元醇法等。将银纳米线应用于柔性透明导电薄膜,已有许多专利和文献报道。2011年,Liu Cai-Hong等人报道银纳米线在柔性PET上制备透明导电薄膜,导电率达175 Ω/sq ,透射率75%,并研究了柔性薄膜的特性,经过100次弯曲后,电阻变化小于2%。(Nanoscale Re-search Letters, 2011, 6(75): 1-8.) 2015年,中国专利201510034152.8公开了乙二醇还原法制备Ag纳米线,并制备透明导电电极,电阻0.97~95Ω/sq,透射率75~95%。Haifei Lu等人制备了银纳米线后制备成透明导电薄膜,再将薄膜浸在含有硝酸银和柠檬酸钠的水溶液中,光照,让银颗粒在银纳米线交叉处选择性生长,这样大大提高透明导电薄膜的导电性能和稳定性。(Haifei Lu, Di Zhang, Xingang Ren, Selective Growth and Integration of Silver Nanoparticles on Silver Nanowires at Room Conditions for Transparent Nano-Network Electrode,ACS Nano, 2014, 8 (10), pp 10980–10987)上述方法较为复杂,制备出新型有节点的长径比均匀的银纳米线,再制备银纳米线透明导电薄膜,这样银纳米线交叉处就已经存在节点,不需要后续加工。但是新型有节点的银纳米线制备鲜有报道。因此发明一种控制因素少,简单快速、大量制备高纯度无颗粒、新型有节点、长径比均匀的银纳米线的方法及其重要。
发明内容
本发明的目的是获得一种简单易控制、成本经济的新型长径比均匀的有节点Ag纳米线制备方法。
本发明提出新型长径比均匀的有节点银纳米线的制备方法的步骤如下:
将分散剂溶解于三元醇中配置成黏稠透明溶液,然后将硝酸银溶解于三元醇中配置成透明溶液,再将硝酸银溶液转入分散剂溶液中混合均匀,最后将混合溶液转移至反应釜中,再放入设定温度(170~200℃)的烘箱保温一段时间结束反应;
将反应釜中Ag纳米线母液用无水乙醇稀释后离心分离有机物,离心分离2次,得到直径30~60nm,长10~20mm的新型有节点、长径比均匀的银纳米线,分散在无水乙醇或异丙醇中。
附图说明
图1是本发明实施例1合成的银纳米线扫描电子显微镜(SEM)图;
图2是本发明实施例1合成的银纳米线透射电子显微镜(TEM)图;
图3是本发明实施例2合成的银纳米线扫描电子显微镜(SEM)图。
具体实施方式
下面结合具体实施例对本发明技术作进一步说明。
实施例1:
将40ml,0.05M硝酸银/三元醇溶液加入60ml,0.67M聚乙烯吡咯烷酮/三元醇溶液中,搅拌混合均匀,然后将混合溶液转移至反应釜中,最后将反应釜放入温度已升至170℃的烘箱中,保温8h后取出结束实验;
将反应釜中Ag纳米线母液用无水乙醇稀释离心分离,重复2次,得到直径30~60nm,长10~20mm的新型长径比均匀的有节点银纳米线分散在异丙醇或无水乙醇中;图1是本实施例得到的银纳米线的扫描电子显微镜(SEM)照片,图2是本实施例得到的银纳米线的透射显微镜(TEM)照片。
实施例2:
将40ml,0.05M硝酸银/三元醇溶液加入60ml,0.67M聚乙烯吡咯烷酮/三元醇溶液中,搅拌混合均匀,然后将混合溶液转移至反应釜中,最后将反应釜放入温度已升至200℃的烘箱中,保温8h后取出结束实验;
将反应釜中Ag纳米线母液用无水乙醇稀释离心分离,重复2次,得到直径30~60nm,长10~20mm的新型长径比均匀的有节点银纳米线分散在异丙醇或无水乙醇中;图2是本实施例得到的银纳米线的扫描电子显微镜(SEM)照片。

Claims (5)

1.一种新型长径比均匀的有节点银纳米线制备方法,其特征在于,所述方法包括下述具体步骤:
(1)将分散剂(方向指导剂)溶解于三元醇中配置成黏稠透明溶液;
(2)将硝酸银溶解于三元醇中配置成透明溶液;
(3)将硝酸银溶液转入分散剂溶液中混合均匀,最后将混合溶液转移至反应釜中,再放入设定温度的烘箱保温一段时间结束反应;
(4)将含银纳米线的母液用无水乙醇稀释离心分离有机物,得到新型长径比均匀的有节点银纳米线分散于酒精或异丙醇中。
2.按照权利要求1所述的一种新型长径比均匀的有节点银纳米线制备方法,其特征在于:分散剂(方向指导剂)选择聚乙烯吡咯烷酮(Mw»1300000)。
3.按照权利要求1所述的一种新型长径比均匀的有节点银纳米线制备方法,其特征在于:三元醇选择的是丙三醇分析纯溶液。
4.按照权利要求1所述的一种新型长径比均匀的有节点银纳米线制备方法,其特征在于:将硝酸银/三元醇溶液转入到分散剂/三元醇溶液中混合均匀后转移至反应釜中,再放入设定温度(170~200℃)的烘箱,保温一段时间后结束反应,然后将反应釜取出放入冷水中冷却。
5.按照权利要求1所述的一种新型长径比均匀的有节点银纳米线制备方法,其特征在于:新型长径比均匀的有节点银纳米线是有节点的长径比均匀的银纳米线。
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US15/763,118 US10773312B2 (en) 2015-10-09 2016-03-15 Preparation method for silver nanowires with uniform aspect ratio and nodes
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US10773312B2 (en) 2015-10-09 2020-09-15 Chongqing University of Arts and Sciences Preparation method for silver nanowires with uniform aspect ratio and nodes
CN105921766A (zh) * 2016-06-14 2016-09-07 吕振瑞 一种宏量制备单分散银纳米线的方法
CN106129134A (zh) * 2016-07-16 2016-11-16 苏州紫萝智能科技有限公司 一种利用太阳光照改善柔性银纳米线透明电极导电性的方法
CN114433865A (zh) * 2022-01-27 2022-05-06 昆明贵研新材料科技有限公司 一种高纯度银纳米线的合成方法
CN114570938A (zh) * 2022-03-10 2022-06-03 南开大学 一种数码可控打印Ag纳米线的方法

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