Synthesis of silicon nanoparticles by laser ablation at low fluences in water and ethanol

Serrano-Ruz, J A; Quiñones-Galván, J.G.; Santos‐Cruz, J.; Moure-Flores, F. de; González, Enrique Campos; Chávez-Chávez, A.; Gómez-Rosas, G.

doi:10.1088/2053-1591/ab6e2f

Cited by 8 publications

(8 citation statements)

References 19 publications

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“…The laser ablation of silicon or silicon nanostructures in liquids opens up a promising way to manufacture almost ready-to-use suspensions of SiNPs of the desired size free of any chemical impurities [40][41][42]. For example, SiNPs of mean size of 20-30 nm formed by the laser ablation of porous silicon were employed as agents for photohyperthermia: irradiation of the SiNP aqueous suspension (0.4 mg/mL) containing unicellular Paramecium caudatum organisms by continuous-wave laser radiation with the intensity of 25 kW/cm 2 at a wavelength of 808 nm was found to result in temperature rise up to 20 • C and death of the living cells [43].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Enhancement of Superficial Tumor Laser Hyperthermia with Silicon Nanoparticles

et al. 2021

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Biodegradable and low-toxic silicon nanoparticles (SiNPs) have potential in different biomedical applications. Previous experimental studies revealed the efficiency of some types of SiNPs in tumor hyperthermia. To analyse the feasibility of employing SiNPs produced by the laser ablation of silicon nanowire arrays in water and ethanol as agents for laser tumor hyperthermia, we numerically simulated effects of heating a millimeter-size nodal basal-cell carcinoma with embedded nanoparticles by continuous-wave laser radiation at 633 nm. Based on scanning electron microscopy data for the synthesized SiNPs size distributions, we used Mie theory to calculate their optical properties and carried out Monte Carlo simulations of light absorption inside the tumor, with and without the embedded nanoparticles, followed by an evaluation of local temperature increase based on the bioheat transfer equation. Given the same mass concentration, SiNPs obtained by the laser ablation of silicon nanowires in ethanol (eSiNPs) are characterized by smaller absorption and scattering coefficients compared to those synthesized in water (wSiNPs). In contrast, wSiNPs embedded in the tumor provide a lower overall temperature increase than eSiNPs due to the effect of shielding the laser irradiation by the highly absorbing wSiNPs-containing region at the top of the tumor. Effective tumor hyperthermia (temperature increase above 42 °C) can be performed with eSiNPs at nanoparticle mass concentrations of 3 mg/mL and higher, provided that the neighboring healthy tissues remain underheated at the applied irradiation power. The use of a laser beam with the diameter fitting the size of the tumor allows to obtain a higher temperature contrast between the tumor and surrounding normal tissues compared to the case when the beam diameter exceeds the tumor size at the comparable power.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Enhancement of Superficial Tumor Laser Hyperthermia with Silicon Nanoparticles

et al. 2021

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“…1a) shows the UV-Vis transmittance spectrum of the colloid. Notice that there is an absorption edge near 600 nm, which is in the visible range of the spectrum, being an indicative of band gap widening due to quantum effects arising from the size reduction [11].…”

Section: Resultsmentioning

confidence: 99%

“…Different approaches have been carried out to fabricate Si nanoparticles, however, the laser ablation of a solid target immersed in a liquid, has shown to be an excellent alternative to fabricate colloidal Si nanoparticles [9,[11][12][13][14][15][16][17] due to its ability to produce hazardous waste free suspensions and nanoparticles with low size polydispersity [18]. As compared to chemical routes for the synthesis of nanoparticles in which chemical precursors, stabilizers and surfactants are used, the laser ablation of solids in liquids offers the advantage of obtaining pure nanoparticles without generation of residues arising from all chemicals used for reactions [19][20][21], avoiding the need for washing procedures for the final products.…”

Section: Introductionmentioning

confidence: 99%

Characterization after aging of Si nanoparticles synthesized by picosecond laser ablation of solids in liquids

Quiñones-Galván

Flores-Castañeda

Rivera

et al. 2023

Optics & Laser Technology

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“…Recent research has examined the potential effects of adding water or other liquids to laser ablation to confine the plasma expansion. According to reports, the containment of plasma expansion by water increases the shock pressure impact [11].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, they applied the fragmentation process to reduce the size of silicon NPs. They found that using a 1064 nm laser wavelength decreased the size of Si nanoparticles [11]. M. Taheri et al used PLAL in two stages to synthesize oxide silicon nanoparticles by applying an Nd:YAG laser with a 1064nm wavelength, a 13 ns pulse duration, and a 10 Hz pulse rate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano Silicon Using Lasers

Muaath J. Mahmoud,

Bassam G. Rasheed

2024

IJNeaM

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Two lasers of the same wavelength (1.06 μm) and various specifications were employed to synthesize silicon nanoparticles. The experimental data reveal the formation of stable silicon nanoparticles with different features such as UV-vis absorption, photoluminescence spectrum, Raman spectrum, Zeta potential, and SEM morphology. Theoretical simulations using COMSOL software were adopted to estimate the surface temperature distribution at the silicon surface and underneath. It is found that maximum temperatures of about (5700 K) and (4600 K) were generated when a Q-switched laser pulse of (10 ns) and fiber laser pulse of (127 ns) were used, respectively. While the recoil pressure at the silicon surface was (6.5*105 N/m2) and (1*103 N/m2) when Nd:YAG and fiber laser were used respectively. It found that increasing the laser energy for Nd:YAG laser and fiber laser power leads to a blue shift of the absorption spectra while the absorption intensity increases with the number of laser pulses and irradiation time. Raman spectroscopy for the prepared silicon nanoparticles was carried out. The Raman peaks for silicon nanoparticles reveal the formation of amorphous silicon. These peaks were observed at (482) and (475 cm-1) when Nd:YAG and fiber lasers were used to produce those nanoparticles. While the photoluminescence of the prepared silicon nanoparticles exhibits peaks at (457 nm) and (495 nm) for Nd:YAG and fiber lasers. The zeta potential reveals that silicon nanoparticle stability is greater for nanoparticles produced by fiber lasers (27 mv) than those produced by Nd:YAG lasers (17 mv) for three months. The corresponding silicon nanoparticle sizes refer to (3.8 nm) and (6 nm). Potential applications of silicon nanoparticles in optoelectronics and biological imaging can be conducted due to the controllable laser micro/nano machining process.

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Synthesis of silicon nanoparticles by laser ablation at low fluences in water and ethanol

Cited by 8 publications

References 19 publications

Numerical Simulation of Enhancement of Superficial Tumor Laser Hyperthermia with Silicon Nanoparticles

Numerical Simulation of Enhancement of Superficial Tumor Laser Hyperthermia with Silicon Nanoparticles

Characterization after aging of Si nanoparticles synthesized by picosecond laser ablation of solids in liquids

Synthesis of Nano Silicon Using Lasers

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