Nanoscopic multiphase interface transient observation device and method based on laser effect

Abstract

The invention discloses a nanoscopic multiphase interface transient observation device based on a laser effect, and the device comprises a micro-needle fin heat dissipation structure chip which is placed on a microscopic detection scanning platform and is internally provided with a micro-column array, a lens structure and an optical fiber coupler, a suspension solution containing gold nanoparticles is introduced into a micro-channel of a micro-column array, a micro-needle fin heat dissipation structure chip and a microscopic detection scanning platform are placed in a cassette, laser pulses emitted by a double-pulse-width laser are aligned with a lens structure under the action of an optical fiber coupler, enter the micro-column array from the side surface after being focused, and irradiate the gold nanoparticles in the suspension solution, and the multi-phase interface transient state formed after the gold nanoparticles are irradiated by the laser pulse is observed in a dark field environment. According to the device, high-resolution dark field observation can be carried out on the nanoscopic multiphase interface transient state generated in the micro-column array, and the temperature of the micro-column array can be controlled. The invention further provides a nanoscopic multiphase interface transient observation method based on the laser effect.

Description

technical field [0001] The invention belongs to the technical field of microscopic scale observation. More specifically, the present invention relates to a nanoscopic multi-phase interface transient observation device and method based on laser action. Background technique [0002] Noble metal nanoparticles can become ideal nanoheat sources when they emit light at plasmon resonance wavelengths. The massive energy of a femtosecond laser pulse can generate a strong, brief, and confined temperature increase around the luminescent plasmonic nanoparticles, eventually leading to transient bubble nucleation. First applications of plasmon-induced microbubbles (MBs), including the generation of surface MBs on metallic films, as effective lenses for surface plasmon waves in microfluidic environments. In this structure, the plasmon resonance of the nanoparticle assembly is located around 530 nm. When such systems are locally illuminated at this wavelength, efficient light absorption ...

AI Technical Summary

Problems solved by technology

[0009] 5. In the transient observation process of nanoscopic multiphase interface, the position of the observed object is not easy to capture and control

[0010] 6. Various finite element models (such as NS equations of fluid mechanics) at the macro scale are often limited by the challenge that the continuity assumption does not hold true at the nano scale

[0011] Moreover, the nanoscopic multiphase interface molecular dynamics model lacks effective experimental data support, and the model can only be checked by static macroscopic physical quantities

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