Chen YiWen, Miao H Y, Zhang Mei, Liang Richard, Zhang Chuck, Wang Ben
High-Performance Materials Institute, Florida State University, Tallahassee, FL 32310, USA.
Nanotechnology. 2009 Aug 12;20(32):325302. doi: 10.1088/0957-4484/20/32/325302. Epub 2009 Jul 21.
This study reports a laser irradiation process to enhance the field emission properties of buckypaper, which is a thin sheet of high-loading carbon nanotube networks. The scanning laser treated the selected regions of buckypaper to activate carbon nanotube (CNT) emitters. This post-process causes a decrease in turn-on field and increases the field enhancement factor (beta), luminance intensity, and uniformity of buckypaper emitters. The phosphorescence luminance intensity and uniformity of buckypaper emitters are measured and characterized. The low turn-on field of 0.56 V microm(-1), highest average luminance intensity of 235.9/255, and uniformity of 99.8% are achieved by adjusting the machining parameters of laser power, laser lens motion speed, laser resolution, laser beam size, and pattern orientation. Those parameters relate to the field emission properties of beta, turn-on electric field, luminance intensity, and uniformity. Using design of experiment (DOE) methodology, the optimal parameter settings for high and uniform electron emission of a buckypaper emitter are obtained within fewer experimental runs.
本研究报告了一种激光辐照工艺，以增强巴基纸的场发射特性，巴基纸是一种高负载碳纳米管网络薄片。扫描激光处理巴基纸的选定区域以激活碳纳米管（CNT）发射体。这种后处理导致开启场降低，并增加了场增强因子（β）、发光强度和巴基纸发射体的均匀性。对巴基纸发射体的磷光发光强度和均匀性进行了测量和表征。通过调整激光功率、激光透镜移动速度、激光分辨率、激光束尺寸和图案方向等加工参数，实现了0.56 V·μm⁻¹的低开启场、235.9/255的最高平均发光强度和99.8%的均匀性。这些参数与β、开启电场、发光强度和均匀性的场发射特性相关。使用实验设计（DOE）方法，在较少的实验运行次数内获得了巴基纸发射体高且均匀电子发射的最佳参数设置。
