Super-hydrophobic three-channel synchronous detection upconversion fluorescence probe detection test piece and preparation method thereof
A simultaneous detection and fluorescent probe technology, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, and material analysis through optical means, to achieve the effects of sensitive sensing detection ability and good self-cleaning ability
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specific Embodiment approach 1
[0053] Specific embodiment 1: The superhydrophobic three-way synchronous detection up-conversion fluorescent probe detection test piece of this embodiment consists of a substrate 1, an up-conversion nanocrystalline layer 2 with a multilayer core-shell structure and superhydrophobic SiO 2 The covering layer 3 consists of a multilayer core-shell structure up-conversion nanocrystalline layer 2 deposited on the substrate 1, superhydrophobic SiO 2 A capping layer 3 is deposited on the up-conversion nanocrystalline layer 2 of the multilayer core-shell structure.
[0054] The up-conversion nanocrystal layer 2 of the multi-layer core-shell structure is composed of the up-conversion nanocrystal of the multi-layer core-shell structure, and the up-conversion nanocrystal of the multi-layer core-shell structure is coated on the surface of the crystal core 2-1 from the inside to the outside Formed by the first functional layer 2-2, the first isolation layer 2-3, the second functional layer ...
specific Embodiment approach 2
[0061] Specific embodiment two: the preparation method of the superhydrophobic three-way synchronous detection up-conversion fluorescent probe detection test piece described in specific embodiment one is carried out according to the following steps:
[0062] 1. Preparation of upconversion nanocrystals with multilayer core-shell structure:
[0063] (1) Preparation of crystal nucleus NaYF 4 :(18%~22%)Yb 3+ / (0.5%~1.5%)Tm 3+ ;
[0064] (2) Prepare the first functional layer NaYF on the surface of the crystal nucleus 4 :(10%~30%)Yb 3+ / (10%~30%)Nd 3+ layer;
[0065] (3) Prepare the first isolation layer NaLuF on the surface of the first functional layer 4 layer;
[0066] (4) Prepare the second functional layer NaYF on the surface of the first isolation layer 4 :(18%~22%)Yb 3+ / (1%~3%)Er 3+ layer;
[0067] (5) Prepare the second isolation layer NaLuF on the surface of the second functional layer 4 layer;
[0068] (6) Prepare the third functional layer NaErF on the sur...
specific Embodiment approach 3
[0081] Specific embodiment three: the difference between this embodiment and specific embodiment two is the crystal nucleus NaYF in step one (1) 4 :(18%~22%)Yb 3+ / (0.5%~1.5%)Tm 3+ The preparation method is as follows:
[0082] a: Press NaYF 4 :(18%~22%)Yb 3+ / (0.5%~1.5%)Tm 3+ Stoichiometric ratio Weigh the total amount of 0.8 ~ 1.2mmol of YCl 3 ·6H 2 O, YbCl 3·6H 2 O, TmCl 3 ·6H 2 O is put into 250mL three-neck flask;
[0083] b: Take 6-9mL of oleic acid and 12-18mL of octadecene into the flask of step a, connect the reaction device and pass in argon gas, heat to 130-150°C to completely dissolve the added rare earth raw materials in the organic solution, Keep for 25-35 minutes;
[0084] c: Cool down to 40-50°C, add 0.10-0.12g NaOH and 0.13-0.16g NH 4 For the methanol solution of F, keep stirring for 20-30 minutes to form crystal nuclei, then raise the temperature to 70-90°C and keep for 20-30 minutes to remove methanol;
[0085] d: After the methanol is removed,...
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