Cairo University

MTPR Journal

 

Nanomaterial Enhanced Emission using Laser Induced Plasma Technique

2016-12-17
A. M. EL Sherbini
Laboratory of Lasers and New Materials, Faculty of Science, Cairo University
Vol./Issue: 16 , id: 220

It was the first worldwide published article about enhancing the amount of light emitted from nanomaterial target based plasma over corresponding bulk material. Both plasmas are created via interaction of Nd: YAG laser pulses under the same ambient conditions [1]. This subject become world-wide-spreading issue [2-8] and was subjected to extensive experimental study using OES-Technique. The effect of different experimental parameters including laser irradiance (fluence), delay time, different laser wavelengths and different types and sizes of nanomaterials were studied over the past five years in different laboratories. After all, some conclusions were drawn: (1) The enhanced emission was found increases linearly with delay time after plasma ignition, (2) Decreases in a logarithmic way with the increasing laser fluence, (3) No changes in both of plasma electron density and temperature from nano-tobulk materials (4) This enhancement emission was found compatible with relative masses ejected from either target and finally (5) The recently published work shows that the main reason of signal enhancement can be attributed to the a significant reduction of plasma threshold fluence offered by the nanomaterial size reduction. In this review we will explore different experimental and theoretical aspects of this new phenomenon.

[1] A.M. EL Sherbini, C.G. Parigger, Wavelength dependency and threshold measurements for nanoparticleenhanced laser-induced breakdown spectroscopy, Spectrochim. Acta B 116 (2016) 8–15 [2] A.M. EL Sherbini, A.-N.M. Aboulfotouh, F. Rashid, S. Allam, T.A. EL Dakrouri, Observed enhancement in LIBS signals from nano vs. bulk ZnO targets: comparative study of plasma parameters, World J. Nanosci. Eng. 2 (2012) 181–188. [3] A.M. EL Sherbini, A.A. Galil, T.M. EL Sherbini, Nanomaterials induced plasma spectroscopy, J. Phys. Conf. Ser. 548 (2014) 012031 [4] A. De Giacomo, R. Gaudiuso, C. Koral, M. Dell’Aglio, O. De Pascale, Nanoparticleenhanced laserinduced breakdown spectroscopy of metallic samples, Anal. Chem. 85 (2013) 10180–10187. http://dx.doi.org/10.1021/ac4016165. [5] A. De Giacomo, R. Gaudiuso, C. Koral, M. Dell’Aglio, O. De Pascale, Nanoparticle enhanced laser induced breakdown spectroscopy: effect of nanoparticles deposited on sample surface on laser ablation and plasma emission, Spec. [6] A.M. EL Sherbini, C.G. Parigger, “Nano-material size dependent laser-plasma thresholds,” Spectrochim. Acta Part B 124, 79–81 (2016).