Field Emission with Ultralow Turn On Voltage from Metal Decorated Carbon Nanotubes
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- 作者：Srividya Sridhar ; Chandrasekhar Tiwary ; Soumya Vinod ; Jose Jaime Taha-Tijerina ; Srividvatha Sridhar ; Kaushik Kalaga ; Benjamin Sirota ; Amelia H. C. Hart ; Sehmus Ozden ; Ravindra Kumar Sinha ; Harsh ; Robert Vajtai ; Wongbong Choi ; Kriszti谩n Kord谩s ; Pulickel M. Ajayan
- 刊名：ACS Nano
- 出版年：2014
- 出版时间：August 26, 2014
- 年：2014
- 卷：8
- 期：8
- 页码：7763-7770
- 全文大小：497K
- ISSN：1936-086X
文摘
A simple and scalable method of decorating 3D-carbon nanotube (CNT) forest with metal particles has been developed. The results observed in aluminum (Al) decorated CNTs and copper (Cu) decorated CNTs on silicon (Si) and Inconel are compared with undecorated samples. A significant improvement in the field emission characteristics of the cold cathode was observed with ultralow turn on voltage (Eto 鈭?0.1 V/渭m) due to decoration of CNTs with metal nanoparticles. Contact resistance between the CNTs and the substrate has also been reduced to a large extent, allowing us to get stable emission for longer duration without any current degradation, thereby providing a possibility of their use in vacuum microelectronic devices.