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Graphene-modified long-range surface plasma resonance sensor chip

A surface plasmon and resonance sensor technology, applied in the measurement of phase influence characteristics, etc., can solve problems such as unclear dependence, and achieve the effects of stable response signal characteristics, simple preparation, and high sensitivity

Active Publication Date: 2021-02-09
YANSHAN UNIV
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Problems solved by technology

However, the effect of graphene on long-range surface plasmon resonance sensors based on semiconducting TDBC films and the dependence of long-range surface plasmon resonance sensors based on different numbers of graphene layers are still unclear

Method used

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  • Graphene-modified long-range surface plasma resonance sensor chip
  • Graphene-modified long-range surface plasma resonance sensor chip
  • Graphene-modified long-range surface plasma resonance sensor chip

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] A graphene-modified long-range surface plasmon resonance sensor chip with an excitation wavelength of 532nm. Such as figure 1 As shown, it includes a sensor chip substrate 1, a medium Cytop layer 2, a semiconductor TDBC film 3 and a graphene layer 4, and the sensor chip substrate 1 is a high refractive index prism. The sensor chip substrate 1 and the semiconductor TDBC film 3 are connected through a medium Cytop layer 2, the thickness of the medium Cytop layer 2 is 2000nm, and the refractive index is 1.34; the thickness of the semiconductor TDBC film 3 is 2-5nm, The refractive index is -2.5886+0.3748i. The semiconductor TDBC film 3 is coated with a graphene layer 4 with a thickness less than or equal to 1.7nm and a refractive index of 3+0.9659i, which is used as a biomolecular recognition layer in contact with the analyte to ensure that...

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Abstract

The invention relates to a graphene-modified long-range surface plasmon resonance sensor chip, belongs to the technical field of measurement, and particularly relates to the technical field of sensorchips. The sensor chip comprises a sensor chip substrate which is a high-refractive-index prism, a medium Cytop layer and a semiconductor TDBC film are sequentially plated above the sensor chip substrate, and the semiconductor TDBC film is coated with a graphene layer. The maximum sensitivity of the sensor chip can be 3243 RIU<-1>, so that the sensor realizes quick, high-sensitivity and stable response signal characteristics to substance molecules.

Description

technical field [0001] The invention relates to a graphene-modified long-range surface plasmon resonance sensor chip, which belongs to the technical field of measurement, and more specifically relates to the technical field of sensor chips. Background technique [0002] In recent years, long-range surface plasmon resonance sensors have developed rapidly in environmental detection, medical diagnosis, and biological analysis. In general, many long-range surface plasmon resonance sensors are widely based on metal-excited surface plasmons. A typical long-range surface plasmon resonance sensor configuration consists of a prism-dielectric Cytop layer-metal layer-sensing layer, and when the refractive index of the sensing layer changes, it will cause a shift in the reflection curve. The phenomenon of surface plasmon resonance can be considered as an optical phenomenon that affects the physical properties of electromagnetic fields. Resonance conditions can be achieved when photons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 王书涛刘娜程琪逄博
Owner YANSHAN UNIV
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