TY - JOUR
T1 - Multiscale Visualization of Colloidal Particle Lens Array Mediated Plasma Dynamics for Dielectric Nanoparticle Enhanced Femtosecond Laser-Induced Breakdown Spectroscopy
AU - Wang, Mengmeng
AU - Jiang, Lan
AU - Wang, Sumei
AU - Guo, Qitong
AU - Tian, Feng
AU - Chu, Zhuyuan
AU - Zhang, Jin
AU - Li, Xin
AU - Lu, Yongfeng
N1 - Funding Information:
We gratefully acknowledge the financial support of the National Key R&D Program of China (Grant No. 2017YFB1104300), the National Natural Science Foundation of China (NSFC; Grant No. 51575053), and The Initiative Postdocs Supporting Program (Grant No. BX20180041).
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/8/6
Y1 - 2019/8/6
N2 - A multiscale visualization of silica colloidal particle lens array (CPLA) assisted laser ablation of copper is investigated. The distributed holes on a crater of CPLA-deposited Cu (CPLA-Cu) show a near-field effect by the silica nanoparticles (NPs), and the plasma emission signal of CPLA-Cu is 3-5 times as strong as that of Cu. Time-resolved plasma expansion, shockwave propagation, plasma plume emission, and nanoparticle distribution are observed and analyzed for ablations on both Cu and CPLA-Cu substrates. The initial expansion of plasma generated on CPLA-Cu is faster than that of pristine Cu. The shockwave of CPLA-Cu is rounder and its plasma plume is wider than those of Cu. The nanoparticle distribution shows a strong lateral collision during plume ejection for CPLA-Cu. Plasma characterization shows the increased plasma temperature is the key reason for femtosecond laser-induced breakdown spectroscopy (fs-LIBS) signal enhancement. This work demonstrates the signal enhancement effect of dielectric NPs on fs-LIBS and provides insights into hydrodynamics of the fs laser-induced plasma generated on CPLA-deposited substrate.
AB - A multiscale visualization of silica colloidal particle lens array (CPLA) assisted laser ablation of copper is investigated. The distributed holes on a crater of CPLA-deposited Cu (CPLA-Cu) show a near-field effect by the silica nanoparticles (NPs), and the plasma emission signal of CPLA-Cu is 3-5 times as strong as that of Cu. Time-resolved plasma expansion, shockwave propagation, plasma plume emission, and nanoparticle distribution are observed and analyzed for ablations on both Cu and CPLA-Cu substrates. The initial expansion of plasma generated on CPLA-Cu is faster than that of pristine Cu. The shockwave of CPLA-Cu is rounder and its plasma plume is wider than those of Cu. The nanoparticle distribution shows a strong lateral collision during plume ejection for CPLA-Cu. Plasma characterization shows the increased plasma temperature is the key reason for femtosecond laser-induced breakdown spectroscopy (fs-LIBS) signal enhancement. This work demonstrates the signal enhancement effect of dielectric NPs on fs-LIBS and provides insights into hydrodynamics of the fs laser-induced plasma generated on CPLA-deposited substrate.
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U2 - 10.1021/acs.analchem.9b01686
DO - 10.1021/acs.analchem.9b01686
M3 - Article
C2 - 31266295
AN - SCOPUS:85071157269
SN - 0003-2700
VL - 91
SP - 9952
EP - 9961
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 15
ER -