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Raman enhanced chemical sensor and production method thereof

A chemical sensor and Raman technology, applied in the direction of Raman scattering, material excitation analysis, etc., can solve the problems of enhancing SERS signal, poor controllability, complicated preparation process, etc., and achieve the effect of enhancing Raman signal and increasing adhesion

Active Publication Date: 2018-01-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this type of chemical sensor is complicated, the controllability is poor, and the SERS signal cannot be further enhanced only by electromagnetic enhancement.

Method used

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  • Raman enhanced chemical sensor and production method thereof
  • Raman enhanced chemical sensor and production method thereof
  • Raman enhanced chemical sensor and production method thereof

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Embodiment

[0045] Such as image 3 As shown, the Raman-enhanced chemical sensor obtained in the embodiment of the present invention includes a glass substrate, a nanosphere structure layer, a gold layer, and a single-layer graphene layer arranged in sequence from bottom to top. The nanospheres are polystyrene nanospheres with a diameter of 500 nm. The specific preparation process is:

[0046] Step 1. Wash the medical slides with a size of 1cm*1cm in acetone, ethanol and deionized water in sequence, and dry them for later use;

[0047] Step 2, preparation of the nanosphere structure layer:

[0048] 2.1 Add sodium dodecyl sulfate to deionized water, and mix evenly by ultrasonic to obtain a sodium dodecyl sulfate (SDS) solution with a mass fraction of 15%;

[0049] 2.2 Take 400 μL of commercially available 2.5% w / v polystyrene nanosphere aqueous solution, centrifuge, remove the supernatant, and obtain 10 μg polystyrene nanosphere; add the obtained 10 μg polystyrene nanosphere into step 2...

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Abstract

The invention relates to a Raman enhanced chemical sensor and a production method thereof, which belong to the field of a semiconductor micro nano device for detecting chemical molecules. The chemicalsensor comprises a four-layer structure, which is a glass substrate, a nano spheres structural layer, a metal layer, and a single layer graphene layer from up to down. The nano spheres structural layer formed by polystyrene is used for forming a surface arraying structure for enhancing scattering of Raman light, the metal layer is used for realizing Raman electromagnetic enhancement, and the single layer graphene layer is capable of absorbing molecules and realizing chemical enhancement; the Raman enhanced chemical sensor uses precious metal to realize electromagnetic enhancement, and uses the single layer graphene layer for realizing chemical enhancement, so that a Raman signal is enhanced.

Description

technical field [0001] The invention relates to a semiconductor micro-nano device for detecting chemical molecules, in particular to a Raman-enhanced chemical sensor and a preparation method thereof. Background technique [0002] Raman spectroscopy is a research method that collects and analyzes the inelastic scattering spectrum generated after excitation by incident light, obtains molecular vibration and other information through the frequency shift of scattered light, and applies it to molecular structure analysis and characterization. When some molecules are adsorbed on the surface of noble metals (such as gold and silver), the Raman spectrum signal intensity of the molecules will be significantly enhanced, which is the surface-enhanced Raman scattering (SERS) effect. In chemical sensors based on the surface-enhanced Raman effect to detect molecular structures, the substrate is usually made of precious metals such as gold and silver, and the LSPR (local surface plasmon re...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 龚天巡何逸文黄文张华柯毅臻刘志伟高敏俞滨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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