金納米顆粒的制備及暗場(chǎng)觀測(cè)系統(tǒng)
[Abstract]:Because of its unique optical properties, non-toxicity and biological compatibility, gold nanoparticles have gradually become the hot research materials of nanotechnology in the world, and have application value in the fields of bio-imaging and micro-nano sensors. It is very important to design an effective method to prepare uniform and stable gold nanoparticles. In this paper, the effective preparation of gold nanoparticles and imaging of gold nanoparticles have been studied. The specific work is as follows: 1. Using AT89C51 single chip microcomputer as the main control device, a small paddle stirring device was designed and fabricated. The device uses pulse width modulation technology to adjust speed, and compiles the computer control software. It can communicate through serial port through single chip microcomputer and computer, and can control and display the residual value of motor speed and set working time in real time on the computer. Continuous, infinite control of speed and working time of DC motor can be realized respectively. 2. The stirring device is used to prepare gold nanoparticles. The gold nanoparticles with different particle sizes were successfully obtained by trisodium citrate reduction method and seed method, and were characterized by transmission electron microscopy (TEM). According to different reaction mechanism and transmission electron microscopy (TEM), the optimal preparation method of stable spherical gold nanoparticles with large particle size was obtained. By comparing and analyzing the experimental results of artificial agitation and agitator agitation, it is proved that uniform agitation is important for the preparation of uniform and stable gold nanoparticles. 3. A new kind of dark field microscope imaging system is designed and built by processing the emitted light from the objective lens on the ordinary optical microscope. The system does not need to limit the numerical aperture of the objective lens and improves the imaging resolution and application range. It is especially suitable for the imaging optical path which requires large numerical aperture objective lens. Finally, the gold nanoparticles are observed and imaged in real-time by this imaging system. The imaging results are good, and the nano-scale imaging is realized.
【學(xué)位授予單位】:中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:O614.123;TB383.1
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