A method for preparing aluminum nanostructures for surface-enhanced Raman scattering
A surface-enhanced Raman, aluminum nanotechnology, applied in Raman scattering, manufacturing tools, welding equipment, etc., can solve problems such as poor, complex process, expensive equipment repeatability, etc., to achieve simple operation, good repeatability, improved repetitive effect
Active Publication Date: 2017-03-29
TIANJIN UNIV
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[0006] In order to solve the problems existing in the prior art, the present invention provides a method for preparing an aluminum nanostructure for surface-enhanced Raman scattering, which overcomes the complex process, expensive equipment and low repeatability of the method for preparing SERS reinforcements in the prior art. bad question
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Now the surface of the 20×20×3mm pure aluminum target is fully polished with different types of sandpaper (coarse sandpaper first, then fine sandpaper) to effectively remove the oxide layer on the surface. 50nm alumina powder for grinding, in order to achieve the purpose of smooth surface as far as possible. Finally, the polished target is placed in a large centrifuge tube for repeated ultrasonic waves to remove the dirt on the surface to achieve the purpose of crystallization. In order to effectively avoid the oxidation of the target surface, the ultrasonic is chromatographically pure ethanol solution.
[0027] After ultrasonication, place an aluminum target with a purity of 99.995% and a thickness of 3 mm in a beaker filled with liquid nitrogen, and at the same time place the beaker in a thermos to ensure the stability of the liquid ...
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Abstract
The invention discloses a preparation method of an aluminum nanometer structure for surface enhancement of Raman scattering. Firstly, a bulk metal aluminum target serves as a raw material for full polishing; then, the polished aluminum target is put in a chromatographically pure ethanol environment for ultrasound treatment; the surface of the aluminum target subjected to ultrasound treatment is cleaned; the aluminum target is put in a small beaker with liquid nitrogen; the liquid level of the liquid nitrogen in the beaker is kept stable; and at normal temperature, the direct target shootingis performed by using millisecond laser by dint of auxiliary effect of lifting an electric displacement table to realize patterning of the nanometer structure. According to the preparation method,the problems of expensive equipment, complex process and weak repeatability of a reinforcement body in a traditional preparation process are overcome, simple synthesis of the reinforcement body of the aluminum nanometer structure in the liquid nitrogen environment with normal temperature and normal pressure is realized, denser Raman hot spots are obtained, and the detecting sensitivity is greatly improved. The preparation method is simple in synthesis method, convenient for operation, excellent in repeatability and high in detecting sensitivity of detected object molecules, belongs to normal-temperature and normal-pressure synthesis, is green and environment-friendly, and is an environment-friendly green synthesis process.
Description
technical field [0001] The invention relates to a method for preparing an aluminum nanostructure, in particular to a method for preparing an aluminum nanostructure for surface-enhanced Raman scattering. Background technique [0002] In recent years, the LSPR phenomenon has attracted extensive attention due to its unique optical properties and its important applications in biomedicine, food safety, and other fields. The nanostructure on the metal surface is excited by the incident light to generate a locally enhanced electric field. The electric field is highly localized on the surface of the nanostructure and is mainly affected by the shape, size, medium environment of the nanostructure unit, and the structure between the units. For distance control, see: Lim, D.-K, Jeon, K-S and Suh, Y.D, Nat. Mater. 2010, 9, 60-67. This structure- and environment-dependent LSPR has been successfully applied in surface-enhanced Raman spectroscopy (SERS) and surface-enhanced fluorescence sp...
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IPC IPC(8): B23K26/362G01N21/65
CPCB23K26/361G01N21/658
Inventor 杨静李西美杜希文
Owner TIANJIN UNIV