▎ 摘　　要

NOVELTY - Preparing multi-walled carbon nanotube finger comprises preparing a layer of metal catalyst film on the surface of the substrate in advance. A vertically oriented multi-walled carbon nanotube array is prepared on the prepared substrate by plasma-enhanced chemical vapor deposition. A plasma active metal is deposited on the prepared multi-walled carbon nanotube array by physical vapor deposition. The vertically oriented multi-walled carbon nanotube arrays are placed with plasmonic particles on the prepared top in a liquid. The top of the vertically aligned multiwalled carbon nanotube (VA-MWCNT) is gathered to form surface-enhanced Raman spectroscopy (SERS) finger hot spots after drying the liquid. USE - Method for preparing a multi-walled carbon nanotube finger used in surface-enhanced Raman scattering detection in liquid and gas phase (claimed). ADVANTAGE - The method prepares the multi-walled carbon nanotube finger in a simple and eco-friendly manner with a large area and high sensitivity without using expensive silicon processing equipment. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the method for preparing a multi-walled carbon nanotube finger. (Drawing includes non-English language text). Depositing metal catalyst films on substrates (a) Treating substrates (b) Growing vertically aligned multiwalled carbon nanotubes (c) Depositing plasma metal (d) Drying liquid phase (e)