Nanoparticle sizing by a laser-induced breakdown detection using an optical probe beam deflection

Colloidal nanoparticles produced from Cu metal in water by laser ablation and their agglomeration

“…Compared to conventional wet chemistry methods, a broad variation of the particle size distributions and long distribution tails at large particle sizes were observed in the case of the laser ablation method. For preparation of the colloidal nanoparticles in these experiments, no surfactant such as poly vinyl alcohol (PVA) or Poly ethylene glycol (PEG) as a stabilizer to prevent the agglomeration of metal ion nanoparticles was used (Im et al, 2011) for the future LIBD measurements (Jung et al, 2009). However, because of the agglomeration of the colloidal nanoparticles, a 60-200 nm size distribution was observed by the LIBD and FFF measurements, and the results are roughly consistent with the PCS and TEM results.…”

“…Detailed instrumentations and the detection methods of LIBD and FFF are in described previous published papers (Jung et al, 2009;Dou et al, 2012). For transmission electron microscopy (TEM, JEOL JEM-2100F, Field Emission Electron Microscope) including an energy dispersive X-ray (EDX) analyzer, samples were immediately prepared by putting a drop of each aqueous solution containing nanoparticles as produced after the laser ablation of 25 min, onto a 200 mesh copper carbon only grid and then allowing the solvent to evaporate in air.…”

“…The long-term objectives of the nanoparticle research using laser ablation described herein are mainly to produce isolated metal colloidal nanoparticles for laser-induced breakdown detection (LIBD), which can determine the size of extremely small colloidal particles with trace level concentrations (Jung et al, 2009), and further, to produce metallic radioactive colloidal nanoparticles, which are a mimic of corrosion products existing in nuclear power reactors or the possible leachate going through underground water from a leaking storage container of nuclear spent fuel, for nuclear-and radio-chemistry based researches.…”

Characteristics of the Laser-Induced Breakdown Detection of Colloidal Nanoparticles for Determining Particle Size

“…A second system was based on the acoustic detection of a shock wave using a piezoelectric transducer (PZT) (Bundschuh et al, 2001b;Izumida et al, 1998;Kitamori et al, 1988Kitamori et al, , 1989Satio et al, 1999;Scherbaum et al, 1996;Walther et al, 2004). Recently, we developed a modified LIBD system based on the optical detection of a shock wave; this system measures the deflection of a probe laser beam due to a shock wave-induced change in the refractive index of the liquid medium (Cho et al, 2008;Jung et al, 2009). In the next subsections, these different LIBD systems are described briefly based on the experimental apparatuses installed in our laboratory (Jung et al, 2006(Jung et al, , 2007(Jung et al, , 2009(Jung et al, , 2011Cho et al, 2008).…”

Nanoparticle characterisation for ecotoxicological studies using imaging and non-imaging based tools

“…Nonetheless, there are tools that belong to a new generation of analysis tools and this includes Nanoparticle Tracking Analysis (NTA), which is able to directly measure particle number concentration. LIBS (Laser Induced Breakdown Spectroscopy) is another technique that can measure particle number concentration [10,11]. However, both techniques are relatively new and their application in nanoecotoxicological investigations is new; thus validation of these techniques are very much needed prior to their use in these studies.…”