Judge Elizabeth J, Heck George, Cerkez Elizabeth B, Levis Robert J
Temple University Department of Chemistry, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, USA.
Anal Chem. 2009 Apr 1;81(7):2658-63. doi: 10.1021/ac802080q.
Remote filament-induced breakdown spectroscopy (R-FIBS) using ultrashort laser pulses was used to measure the carbon/clay ratios between three graphite composites of different hardness at a standoff distance of approximately 6 m. Measurements using R-FIBS and femtosecond laser-induced breakdown (fs-LIBS) reveal similar selectivity and ability to excite emission. Comparison of the two stand-off techniques with optical microscopy and electron microprobe point detection confirmed the qualitative analysis capability of both femtosecond remote probing techniques. The R-FIBS technique produced more accurate results compared to fs-LIBS due to the intensity clamping nature of the filament ablation source. Measurement of the plasma temperatures for the metallic emission lines (approximately 8500 K) and the C(2) Swan lines (approximately 4500 K) suggest that the plasmas from different microdomains (clay and graphite) are not in equilibrium.
使用超短激光脉冲的远程丝状诱导击穿光谱法（R-FIBS）被用于在约6米的远距离下测量三种不同硬度的石墨复合材料之间的碳/粘土比率。使用R-FIBS和飞秒激光诱导击穿（fs-LIBS）进行的测量揭示了相似的选择性和激发发射的能力。将这两种远距离技术与光学显微镜和电子微探针点检测进行比较，证实了两种飞秒远程探测技术的定性分析能力。由于丝状烧蚀源的强度钳位特性，与fs-LIBS相比，R-FIBS技术产生了更准确的结果。对金属发射线（约8500 K）和C(2) 天鹅线（约4500 K）的等离子体温度测量表明，来自不同微区（粘土和石墨）的等离子体处于非平衡状态。
