K. K. Ashikkalieva, V. V. Kononenko, N. R. Arutyunyan, E. V. Akhlyustina, E. V. Zavedeev, A. L. Vasiliev, A. L. Golovin, V. I. Konov
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引用次数: 0
摘要
利用光学吸收光谱法研究了Ti׃Al2O3激光脉冲(τ = 130 fs, f = 1 kHz, N = 6 × 104-3 × 106脉冲，平均辐射功率为0.8 W)高强度照射下氢氯金酸(HAuCl4)水溶液的还原动力学和金纳米粒子的形成与解体。这种高强度的辐射被发现会导致形成(在辐射期间和之后)，伴随着单个金纳米颗粒直径几十纳米，细长(链)亚微米结构，由不同形状的单个纳米元素组成。本文讨论了液体的多光子电离、加热、超短激光脉冲的强烈冲击以及高平均功率辐射对液体加热所引起的纳米结构的修饰等纳米结构形成和演化机制的具体特征。
Laser Synthesis of Gold Nanochains from Hydrochloroauric Acid Aqueous Solutions
The dynamics of the reduction of hydrochloroauric acid (HAuCl4) aqueous solutions and the formation and disintegration of gold nanoparticles under high-intensity irradiation by Ti׃Al2O3 laser pulses (τ = 130 fs, f = 1 kHz, N = 6 × 104–3 × 106 pulses, average radiation power of 0.8 W) has been investigated by optical absorption spectroscopy. This high-intensity irradiation is found to cause formation (both during irradiation and after it), along with single gold nanoparticles several ten nanometers in diameter, elongated (chain) submicron structures, consisting of individual nanoelements of different shape. Specific features of the mechanisms of formation and evolution of nanostructures, caused by the multiphoton ionization of a liquid, its heating, and modification of nanostructures as a result of intense impact of an ultrashort laser pulse, as well as liquid heating by radiation with a high average power, are discussed.
期刊介绍：
Physics of Wave Phenomena publishes original contributions in general and nonlinear wave theory, original experimental results in optics, acoustics and radiophysics. The fields of physics represented in this journal include nonlinear optics, acoustics, and radiophysics; nonlinear effects of any nature including nonlinear dynamics and chaos; phase transitions including light- and sound-induced; laser physics; optical and other spectroscopies; new instruments, methods, and measurements of wave and oscillatory processes; remote sensing of waves in natural media; wave interactions in biophysics, econophysics and other cross-disciplinary areas.
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