Optical fiber hydrogen sensor based on core/shell nano periodic linear array plasma metamaterial

Abstract

The invention relates to an optical fiber hydrogen sensor based on a core / shell nano periodic linear array plasma metamaterial. The sensor comprises an optical fiber and a gold core / palladium shell nanowire array patterned on an end surface of the optical fiber. The preparation method comprises steps that gold and aluminum are deposited on the end surface of the optical fiber, a porous aluminum oxide structure is formed through the anodic oxidation process, the diameter of a hole is corroded and enlarged, gold is filled, a gold nanowire is formed, an aluminum oxide gold nanowire composite filmis formed by the gold nanowire and the aluminum oxide structure, and palladium is plated around the gold nanowire or on an end surface of the gold nanowire to form a gold-palladium composite structure; a layer of periodically ordered polystyrene nano microsphere film is transferred on a surface of the palladium-plated aluminum oxide gold nanowire composite film, the gold-palladium composite nanowire structure which is not masked by the polystyrene nano microspheres is removed through ion etching, and the polystyrene nano microspheres are removed, and lastly, the alumina matrix is removed. Themethod is advantaged in that an optical fiber sensor is manufactured through the electrochemical technology, the method is simple and low in cost, and the optical fiber sensor has high sensitivity and high safety.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to an optical fiber hydrogen sensor based on core / shell nano-periodic line array plasma metamaterials. Background technique [0002] Hydrogen is an extremely clean energy source, and its oxidation product is only water, and hydrogen can be regenerated by electrolysis, photolysis of water, etc. Therefore, hydrogen is considered to be one of the most promising clean energy carriers for fuel cells and internal combustion engines. It is widely used in scientific research and industry, especially in glass and steel manufacturing, refining of petroleum products, and the general chemical industry. However, hydrogen is a highly flammable, colorless and odorless gas, which is extremely flammable under ambient atmospheric conditions with a concentration of more than 4% by volume, which makes the storage and use of hydrogen very difficult. These properties hinder the use of hydrogen in i...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and proposes a fiber optic hydrogen sensor based on gold core / palladium shell nano-periodic line array plasma metamaterials, to solve the measurement of optical hydrogen sensors under the existing technical conditions The problem of low precision and sensitivity

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