Method for preparing chain shaped barium fluoride nanospheres with DNA as mould plate

A technology of barium fluoride and nanospheres, applied in the direction of titanium halide, etc., can solve the problems of uneven size distribution of nanospheres, irregular shape of barium fluoride, uneven particle size distribution, etc., and achieve excellent optical performance and regular shape. , the effect of low cost

Inactive Publication Date: 2009-02-18
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can directly synthesize BaF by aqueous solution precipitation method under normal temperature and pressure. 2 Nanospherical particles, the disadvantage is the synthetic BaF 2 The size distribution of nanospheres is not

Method used

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  • Method for preparing chain shaped barium fluoride nanospheres with DNA as mould plate
  • Method for preparing chain shaped barium fluoride nanospheres with DNA as mould plate
  • Method for preparing chain shaped barium fluoride nanospheres with DNA as mould plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the mixed solution 5ml of water: ethanol volume ratio 1:3, prepare Ba(NO 3 ) 2 and NH 4 A supersaturated solution of F. DNA used: 0.38 μg / μL, OD: 1.76, 100 μL, pipetting repeatedly, thoroughly dispersed in water. Ba(NO 3 ) 2 The saturated solution was centrifuged, and 50 μL was added to the above DNA system, mixed evenly, vortexed for 3 minutes, placed at 20°C, and oscillated at 50 r / min for 2 hours. Mix the solution and quickly take the NH with a micropipette 4 Add 200 μL of solution F to the above system, vortex for 5 seconds, move to 20°C, and shake at 50 r / min for 3 hours. Finally, put the whole system in 4°C water and let it stand.

Embodiment 2

[0020] According to the mixed solution 5ml of water: ethanol volume ratio 1:4, prepare Ba(NO 3 ) 2 and NH 4 A supersaturated solution of F. DNA used: 0.62 μg / μL, OD: 1.87, 100 μL, pipetting repeatedly, thoroughly dispersed in water. Ba(NO 3 ) 2 The saturated solution was centrifuged, 100 μL was added to the above DNA system, mixed evenly, vortexed for 5 min, placed at 25°C, and oscillated at 100 r / min for 3 h. Mix the solution and quickly take the NH with a micropipette 4 Add 300 μL of solution F to the above system, vortex for 12 seconds, move to 25°C, and shake at 100 r / min for 4 hours. Finally, put the whole system in 6°C water and let it stand.

Embodiment 3

[0022] According to the mixed solution 5ml of water: ethanol volume ratio 1:5, prepare Ba(NO 3 ) 2 and NH 4 A supersaturated solution of F. DNA used: 1.30 μg / μL, OD: 1.87, 200 μL, pipetting repeatedly, thoroughly dispersed in water. Ba(NO 3 ) 2 The saturated solution was centrifuged, and 150 μL was added to the above DNA system, mixed evenly, vortexed for 8 minutes, placed at 30°C, and oscillated at 150 r / min for 4 hours. Mix the solution evenly, quickly use a micropipette to take 400 μL of NH4F solution and add it to the above system, vortex for 20 seconds, move to 30°C, and shake at 150 r / min for 5 hours. Finally, put the whole system in 8°C water and let it stand.

[0023] figure 1 It is a representative TEM image of chain-shaped barium fluoride nanosphere particles using DNA as a template. It can be seen from the figure that barium fluoride nanospheres are arranged in chains due to the structure induced by DNA, and the shape is better. Compared with the nanospheres...

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Abstract

The invention discloses a method for preparing chain-shaped barium fluoride nano-ball adopting DNA as the template, and belongs to the technical field of the nano materials, which comprises the following steps: Ba(NO3)2 ultra-saturated solution is added into the DNA system, and is mixed with the DNA system in whirl way for 3 to 8 minutes; under the conditions of 20 to 30 DEG C and 50 to 150 r/min, the mixture is shaken for 2 to 4 hours; NH4F ultra-saturated solution is added in the mixed system, and is mixed in whirl way for 5 to 20 seconds, and is shaken for 3 to 5 hours under the conditions of 20 to 30 DEG C and 50 to 150 r/min. The entire system is kept quietly at the temperature of 4 to 8 DEG C to get the chain-shaped barium fluoride nano-ball adopting DNA as the template. The invention can directly adopt the biological nano structure existing in the nature as the template to synthesize the chain-shaped nano-ball structure that is different from the original methods for preparing BaF2, thereby not only preventing the complicate preparation craftwork of the conventional template, but also being completed under the moderate conditions of the normal temperature and the normal atmosphere; moreover, the method has simple craftwork, low cost, easy controlled reaction and high productivity.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a process for preparing chain-like barium fluoride nanospheres directly using biological nanostructures existing in nature as templates. Background technique [0002] Barium fluoride is an alkaline earth fluoride crystal, colorless and transparent, with a cubic crystal structure. BaF 2 The crystal has the characteristics of good moisture resistance, high service temperature and good luminous performance, and can be used as CO 2 Window materials for devices such as lasers and complete machines, and other optical components. At the same time, it also has excellent scintillation performance. The fluorescence decay time of its fast component is extremely short (0.6ns). It is the fastest scintillator and a good buffer layer. It can connect semiconductors with different lattice constants. The field has important application value and prospect. Therefore, BaF 2 In recent year...

Claims

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Application Information

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IPC IPC(8): C01G23/02
Inventor 李娜高发明侯莉
Owner YANSHAN UNIV
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