선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- After confirming a uniform emission pattern, we conducted J-E measurements from the jig with a clean SUS304 plate as the anode as shown in Fig. 1. We obtained a stable and reproducible J-E curve from the DWCNT field emitters after several electric field sweeps, as shown in Fig.
- We conducted a two-step purification process according to the following procedure. First, the as-synthesized DWCNTs were oxidized in a furnace at 400 o C in the ambient air for 1 hour in order to remove the amorphous carbon material on the surface of the DWCNTs. Second, the oxidized DWCNTs were soaked and sonicated in a dilute 10% acetic acid solution at room temperature.
- In this work, we evaluated the field emission properties of the virgin planar DWCNT field emitters deposited on a Ag/SUS304 substrate by using a spray method. We obtained a stable and reproducible current density (J) versus the electric field (E) curve after several voltage sweeps.
- The morphologies and microscopic structure of the purified DWCNTs were characterized by scanning electron microscopy (SEM) (HITACHI, S-4700) and high-resolution TEM (HRTEM) (JEOL, JEM-3011, 300 kV). The diameter and crystallinity of the purified DWCNTs were evaluated by Raman spectroscopy (HORIBA JOBIN-YVON, HR800-UV) using Ar laser excitation (laser beam wavelength: 514.5 nm) and the purity of the DWCNTs was evaluated by thermogravimetric analysis (TA Instruments, TGA Q-50).
- To evaluate the field emission performance of the purified DWCNTs, the entangled DWCNTs were dipped in ethanol solution and dispersed well by a 30 min ultra-sonication treatment. With optimized spraying parameters, the DWCNT suspensions were sprayed on a Ag paste deposited at a little edge grinded SUS304 disk with an area of 0.
- We further performed Raman spectroscopy to characterize the structure and the diameter distribution of the purified DWCNTs. Fig.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.