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首页> 外文会议>Laser Florence 2017: Advances in Laser Medicine >Laser synthesis of hybrid nanoparticles for biomedicine
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Laser synthesis of hybrid nanoparticles for biomedicine

机译：激光合成生物医学纳米粒子

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The extraordinary properties of size-tunable nanoparticles (NPs) have given rise to their widespread applications in Nanophotonics, Biomedicine, Plasmonics etc. Semiconductor and metal NPs have found a number of significant applications in the modern biomedicine due to ultrasmall sizes (1-10 nm) and the size-dependent flexibility of their optical properties. In the present work passive Q-switched Nd:YAG pulsed laser was used to synthesize NPs by method of laser ablation in different liquids. For cases of hybrid metal NPs we have demonstrated that plasmon resonance can be modified and tuned from the plasmon resonances of pure metal NPs. The shifted plasmon resonance frequency at 437 nm for Au-Ag hybrid NPs, and 545 nm for Au-Cu hybrid NPs have been observed. Effectiveness of biotissue ablation in the case of the tissue sample that colored with metal NPs was approximately on 4-5 times larger than for the sample with non-colored area. Laser welding for deep-located biotissue layers colored by metal NPs has been realized. The luminescence properties of the colloidal hybrid Si-Ni nanoparticles' system fabricated by pulsed laser ablation are also considered. The red-shifted photoluminescence of this system has been registered in the blue range of the spectrum because of the Stark effect in the Coulomb field of the charged Ni nanoparticles. Summarizing, the knowledge of peculiarities of optical properties of hybrid NPs is very important for biomedical applications. More complex nanoassemblies can be easily constructed by the presented technique of laser synthesis of colloidal QDs including complexes of NPs of different materials.
机译：尺寸可调纳米颗粒（NPs）的非凡性能已使其在纳米光子学，生物医学，等离子学等领域得到广泛应用。由于超小尺寸（1-10 nm），半导体和金属NP在现代生物医学中已发现了许多重要应用。 ）及其光学特性的尺寸依赖性柔性。在目前的工作中，使用无源调Q开关Nd：YAG脉冲激光通过激光烧蚀在不同液体中合成NP。对于杂化金属NP的情况，我们已经证明可以从纯金属NP的等离振子共振中修改和调整等离激元共振。已观察到Au-Ag混合NP在437 nm处的等离激元共振频率发生了偏移，Au-Cu混合NP在545 nm处发生了变化。在用金属NPs染色的组织样品中，生物组织消融的效率大约是未染色区域样品的4-5倍。已经实现了对金属NP着色的深层生物组织层的激光焊接。还考虑了通过脉冲激光烧蚀制备的胶体杂化Si-Ni纳米粒子系统的发光特性。由于带电的Ni纳米粒子的库仑场中有Stark效应，该系统的红移光致发光已记录在光谱的蓝色范围内。综上所述，杂交NP光学特性的知识对于生物医学应用非常重要。通过所提出的胶体量子点的激光合成技术，包括不同材料的纳米粒子的复合物，可以很容易地构建更复杂的纳米组装体。

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