Active glass nanoparticles by ultrafast laser pulses
Active glass nanoparticles by ultrafast laser pulses
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DOI：
10.1049/mnl:20080028
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发表时间：
2008-12
影响因子：
1.3
通讯作者：
Kuniaki Hiromatsu;D. Hwang;C. Grigoropoulos
中科院分区：
文献类型：
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作者：
Kuniaki Hiromatsu;D. Hwang;C. Grigoropoulos
作者已经成功地展示了一种方法，该方法采用脉冲激光烧蚀活性玻璃来产生表现出上转换的纳米颗粒，由近红外波长泵浦并发射可见光。采用高重复频率超短脉冲激光在大气条件下烧蚀玻璃。通过电子显微镜分析收集的喷射颗粒以确定颗粒尺寸并观察形态。测得的平均粒径为约17 nm。从纳米颗粒中观察到明亮的上转换绿色发射，几乎以与体样品相似的方式。上转换光致发光特性已被研究，以探索潜在的应用，高效的生物成像和发光器件。
The authors have successfully demonstrated a method employing pulsed-laser ablation of active glass to produce nanoparticles exhibiting upconversion, pumped by near-infrared wavelengths and emitting visible light. A high repetition rate ultrashort pulsed laser was used to ablate glass under atmospheric conditions. Ejected particles collected were analysed by electron microscopy to determine particle size and characterise the morphology. The measured mean particle diameter was ~17~nm. A bright upconversion green emission was observed from the nanoparticles almost in a similar fashion as from the bulk specimen. The upconversion photoluminescence characteristics have been investigated to explore potential applications for efficient bioimaging and light-emitting devices.