为了得到红外激光在微热管铜基板表面刻蚀复合沟槽的过程中,不同激光工艺参量（激光重复频率、扫描速率、扫描次数）对复合沟槽尺寸和形貌的影响规律,采用单因素实验法进行了红外激光刻蚀微热管复合沟槽的工艺实验研究,确定了使用1064nm波长红外光纤激光器刻蚀微热管复合沟槽的合理工艺参量。结果表明,当激光重复频率为40kHz、扫描速率为150mm/s、扫描次数为25次时,红外激光刻蚀的复合沟槽能为微热管工质的回流提供较大的毛细压力。该研究对提高沟槽式微热管的传热性能具有参考意义。
激光技术 激光刻蚀 复合沟槽 影响规律 最大毛细压力 微热管 laser technique laser etching composite grooves influence law maximum capillary pressure micro heat pipe
Author Affiliations
Abstract
We carry out in situ single-molecule measurements of the specific interaction between apolipoprotein A-I (apoA-I) and ATP binding cassette transporter A1 (ABCA1) on THP-1 cells. Single-molecule force spectroscopy shows that similar to normal apoA-I, the dysfunctional apoA-I from diabetes patients interacts with ABCA1 via two different binding sites on the cells. The strength of dysfunctional apoA-I binding to a high-capacity binding site is 26.5+(-)4.9 pN. The minor direct apoA-I/ABCA1 binding strength is 56.7+(-)4.1 pN. These results facilitate a pathological understanding of the mechanisms that underlie the specific interaction of apoA-I and ABCA1 at the single-molecule level.
170.0170 Medical optics and biotechnology 140.7010 Laser trapping 180.0180 Microscopy 120.0120 Instrumentation, measurement, and metrology Chinese Optics Letters
2013, 11(9): 091701
1 电子科技大学物理电子学院，成都 610054
2 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室，上海 201800
研究了双面抛光氧化镁单晶(111)表面800 nm飞秒激光单脉冲烧蚀阈值和激光脉宽的依赖关系．利用泵浦－探针技术，测量不同能量和脉宽作用下飞秒激光烧蚀的时间分辨反射率的演化．通过扫描电镜观察其烧蚀形貌，发现大量的沿氧化镁[100]晶向开裂的裂纹．讨论了表面裂纹的形成机理，并解释了飞秒激光烧蚀氧化镁的超快动力学过程．
飞秒激光脉冲 烧蚀 氧化镁 超快动力学 Femtosecond laser pulse Ablation Magnesia Ultrafast dynamics
Author Affiliations
Abstract
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
The ablation in zinc selenide (ZnSe) crystal is studied by using 150-fs, 800-nm laser system. The images of the ablation pit measured by scanning electronic microscope (SEM) show no thermal stress and melting dynamics. The threshold fluence is measured to be 0.7 J/cm2. The ultrafast ablation dynamics is studied by using pump and probe method. The result suggests that optical breakdown and ultrafast melting take place in ZnSe irradiated under femtosecond laser pulses.
320.7130 ultrafast processes in condensed matter including semiconductors 320.2250 femtosecond phenomena 350.1820 damage Chinese Optics Letters
2005, 3(10): 10615
Author Affiliations
Abstract
Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
