氧化锌纳米复合材料的场发射性能研究  

Investigation on Field Emission Performance of Zinc Oxide Nanocomposites

作　　者：陈贵滔 钱维金[1] 涂友情 黄卫军 董长昆[1] CHEN Gui-tao;QIAN Wei-jin;TU You-qing;HUANG Wei-jun;DONG Chang-kun(Wenzhou Key Lab of Micro-Nano Optoelectronic Devices,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]温州大学温州市微纳光电器件重点实验室,浙江温州325035

出　　处：《真空电子技术》2024年第4期54-59,67,共7页Vacuum Electronics

基　　金：国家自然科学基金61871292、623741186资助,浙江省教育厅一般科研项目Y202248948资助。

摘　　要：采用两步法制备得到氧化锌纳米复合材料。首先采用低温水热法在硅基底上生长得到氧化锌纳米棒阵列,再采用电泳法分别制备得到3种氧化锌纳米复合材料,并对所得产物进行了SEM、XRD、EDS和XPS表征,最后对产物进行了场发射性能测试。XRD、EDS和XPS测试结果表明制备产物为Al_(2)O_(3)-ZnO、MgO-ZnO和CuO-ZnO纳米复合材料。同氧化锌纳米棒阵列相比,3种氧化锌纳米复合样品的开启电场均有所下降,其中MgO-ZnO纳米复合样品的场发射性能最优,开启电场为4.7 V/μm,4种样品的开启电场从低到高依次是:MgO-ZnO<Al_(2)_O_(3)-ZnO<CuO-ZnO<ZnO,研究结果表明构建纳米复合材料能够有效提高氧化锌纳米棒的场发射性能。Zinc oxide nanocomposites are prepared using a two-step method.Firstly,ZnO nanorod arrays are grown on a silicon substrate by a low-temperature hydrothermal method.Then three types of zinc oxide nanocomposites are obtained using electrophoresis method.All products are characterized by SEM,XRD,EDS,XPS,and finally the field emission performances of the products are investigated.The results of XRD,EDS,and XPS characterizations indicate that the prepared products are Al_(2)O_(3)-ZnO,MgO-ZnO,and CuO-ZnO nanocomposites.Compared with pristine ZnO nanorods,the three ZnO nanocomposite samples all have lower turn on fields.The MgO-ZnO nanocomposite sample exhibits the best field emission performance,with a turn-on field of 4.7 V/μm.The turn-on fields of the four samples,from low to high,are as follows:MgO-ZnO<Al_(2)O_(3)-ZnO<CuO-ZnO<ZnO.The results suggest that the construction of nanocomposites can effectively improve the field emission performance of ZnO nanorods.

关 键 词：场发射 氧化锌纳米棒 纳米复合材料 水热法 电泳法 

分 类 号：TM23[一般工业技术—材料科学与工程]