Preparation method for two-dimensional single-layer Ag SHINs membrane
A single-layer, shell-layer technology, applied in coatings, metal processing equipment, metal material coating technology, etc., can solve the problems of difficult control of the size and shape of Ag nanoparticles, difficult control of shape and size, loss of activity, etc. , to achieve the effect of solving signal repeatability and universality, solving material stability, and simple preparation method
Inactive Publication Date: 2018-10-12
XIAMEN SPEC TECH CO LTD
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Problems solved by technology
However, it is easily oxidized in the natural environment and loses its original activity, and its shape and size are difficult to control in the conventional synthesis process, which seriously hinders its practical application.
Until 2015, the applicant used silver nanoparticles prepared by the seed growth method to coat inert silica to form a shell to isolate silver nanoparticles (Ag SHINs). problem, and also solve the problem that the size and shape of Ag nanoparticles are difficult to control
However, in the field of analysis, in addition to solving the stability of the material itself, it is far from enough
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[0016] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.
[0017] 1) Add 20ml of Ag SHINs into a 50ml container;
[0018] 2) Add 1ml of cyclohexane, sonicate for 30s and let stand for 1min;
[0019] 3) After adding 1 ml of ethanol and standing for 1 min, the two-dimensional single-layer Ag SHINs film at the interface between cyclohexane and water was transferred to a hydrophilically treated silicon substrate. The obtained two-dimensional monolayer Ag SHINs as figure 1 As shown, the inset is the microstructure of Ag SHINs under transmission electron microscopy (TEM). The scanning electron microscope (SEM) morphology of Ag SHINs prepared by conventional methods is as follows: figure 2 As shown, the stability of the melamine-enhanced Raman scattering spectrum signals of the two-dimensional single-layer Ag SHINs and the substrate-to-surface prepared by conventional methods in different batches and different p...
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Abstract
The invention relates to a preparation method for a two-dimensional single-layer Ag SHINs membrane, and relates to Ag SHINs membranes. Prepared Ag SHINs is contained into a container, then cyclohexaneis added for ultrasound treatment, and then ethyl alcohol is added for standing; the two-dimensional single-layer Ag SHINs membrane formed at the interface of the cyclohexane and water is transferredto a silicon wafer or other substrate materials obtained after hydrophilic treatment for standby application; and Ag SHINs nano particles are used as raw materials, the cyclohexane is an oil substance and forms an oil/water two-phase interface together with water, then the ethyl alcohol is used as a cosolvent of the two substances, and the Ag SHINs is subject to self-assembly formation at the interface of the cyclohexane and the water. The adopted substances only comprise the cyclohexane and the ethyl alcohol. The preparing technology is simple, convenient, quick, safe and non-poisonous, thelarge-batch large-scale two-dimensional single-layer Ag SHINs membrane can be obtained through simple equipment, and the preparation method can be applied to the surface enhanced Raman spectroscopy technology, the fluorescence enhancement technology and the like.
Description
technical field [0001] The invention relates to an Ag SHINs film, in particular to a preparation method of a two-dimensional single-layer Ag SHINs film. Background technique [0002] Silver nanoparticles have been proven to exhibit their unique optical, electromagnetic and biocompatibility advantages in many fields, making them widely used in biological monitoring, surface-enhanced Raman scattering spectroscopy, catalytic materials and many other fields. However, it is easily oxidized in the natural environment and loses its original activity, and its shape and size are difficult to control in the conventional synthesis process, which seriously hinders its practical application. Until 2015, the applicant used silver nanoparticles prepared by the seed growth method to coat inert silica to form a shell to isolate silver nanoparticles (Ag SHINs). problem, and also solve the problem that the size and shape of Ag nanoparticles are difficult to control. However, in the field of ...
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IPC IPC(8): C23C24/00B22F1/02B82Y30/00B82Y40/00
CPCC23C24/00B82Y30/00B82Y40/00B22F1/16
Inventor 李剑锋杨晶亮金志平
Owner XIAMEN SPEC TECH CO LTD
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