Synthesis of colloidal silicon and germanium nanoparticles by laser ablation of solid Si and Ge targets in ethanol

Serrano-Ruz, J A; Campos-González, E.; Santoyo-Salazar, J.; Arias-Cerón, J.S.; Chávez-Chávez, A.; Gómez-Rosas, G.; Pérez-Centeno, A.; Ceja, Israel; Moure-Flores, F. de; Meléndez‐Lira, M.; Hernández–Hernández, A.; Santana-Aranda, M. A.; Quiñones-Galván, J.G.

doi:10.1088/2053-1591/aaa446

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…The band at 490 cm −1 corresponds to amorphous Si [8]. Semaltianos et al [7] reported a shift on the TO Raman mode of Si attributed to phonon confinement, they also found that the band centered at 490 cm −1 can be associated to amorphous Si [6]. The band centered at 513 cm −1 is associated to Sinc.…”

Section: Methodsmentioning

confidence: 97%

“…It is worth noting that the shift of the spectrum corresponding to the sample obtained from the laser treatment is large, which, according to the limits calculation of the models [13,14] cannot correspond to quantum confinement in nanocrystals. Instead, this shift is attributed to the existence of amorphous silicon [6,7]. To further analyze this behavior, a deconvolution of the spectrum corresponding to the laser treated sample is shown in figure 7.…”

Section: Methodsmentioning

confidence: 99%

“…Synthesis of silicon nanoparticles have been successfully achieved using chemical methods [4]; however, the problem with these methods is that they produce toxic or non-environmentally friendly residues from the precursors. Laser ablation of a solid target immersed in a liquid (LAL), is a good alternative to fabricate nanoparticles [6][7][8][9][10] without toxic residues generation [11]. The LAL method consists in ablating a bulk solid target immersed in liquid media.…”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that decreasing size of silicon crystals, induces shifts on their Raman spectra in comparison with the signal of bulk silicon [6,13,14].…”

Section: Introductionmentioning

confidence: 99%

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

Serrano-Ruz

Quiñones-Galván

Santos‐Cruz

et al. 2020

Mater. Res. Express

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Colloidal silicon nanoparticles (Si-nc) where synthesized by laser ablation of a solid Si target in water and ethanol. The target was immersed in a vessel containing the solvent and irradiated during 5 and 10 min at different fluences: 0.530, 0.608, 0.687 J cm −2 . Ablation was carried out using a laser wavelength of 1064 nm. The obtained colloidal nanoparticles were irradiated after the synthesis to evaluate if laser fragmentation could be produced. In addition, a series of nanoparticles using ethanol as liquid medium was synthesized ablating with 532 nm. Colloidal nanoparticles were structurally characterized by Raman spectroscopy and Transmission Electron Microscopy. Size of the Si-nc were calculated by the theorical models: Bond Polarizability Model (BPM) and One-Phonon Confinement Model (PCM), where nanocrystals ranging from 2 to 11 nm were found.

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Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…It has been reported that decreasing size of silicon crystals, induces shifts on their Raman spectra in comparison with the signal of bulk silicon [6,13,14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Serrano-Ruz

Quiñones-Galván

Santos‐Cruz

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

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“…22,24,25 This optical range makes Ge NCs excellent candidates for bioimaging applications. 26 Over the past two decades, a wide array of methods have been developed to fabricate Ge NCs, including laser ablation, 29 solution phase synthesis, 28,30 reductive thermal processing, 31 and electrochemical etching. 32 Compared to those approaches, nonthermal plasma methods are exemplified by high purity products, narrow particle size distributions, and efficient incorporation of dopants.…”

Section: ■ Introductionmentioning

confidence: 99%

Bacterial Toxicity of Germanium Nanocrystals Induced by Doping with Boron and Phosphorus

Zhi

Yang

Hudson-Smith

et al. 2019

ACS Appl. Nano Mater.

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Though characterized by excellent optical and electronic performance, traditional cadmium (Cd)- or lead (Pb)-based semiconductor nanocrystals, namely quantum dots, are arousing environmental concerns due to the toxic heavy metal contents. In this context, germanium nanocrystals have sparked research interests in recent years as germanium is conventionally regarded as an environmentally benign element. While it is well-known that doping with p/n-type impurities (such as boron/phosphorus) can tune the original performance of semiconductor materials, few efforts have been devoted to investigating how doped germanium nanocrystals may influence the environment if released into the ecosystem. In this study, we demonstrate that the addition of dopants induces the production of reactive oxygen species, leading to significant toxic effects toward a model organism, Shewanella oneidensis MR-1.

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Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

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Diverse nanomaterials, in the forms of carbides, sulfides, oxides, metals, hydroxides, etc., have been synthesized by laser ablation in liquids (LAL) with metal targets as the dominant educts. Many advantages of LAL technique itself and its products have been revealed since 1983 when the first report about LAL was released. Different from traditional wet-chemical synthesis, one unique feature of LAL is its resultant extreme high-temperature and high-pressure local environment for the nucleation and growth of nanomaterials, despite being performed at room temperature. This extreme condition can induce the atomization and ionization of the target materials and liquid molecules to incur different chemical reactions. The laser, liquid, liquid additive, and target can significantly alter the local environment in a broad range. Thus, different phases and shapes of nanomaterials are producible even from the same target. Through directly comparing the products of LAL of 13 kinds of chosen representative metals synthesized under different conditions, this review presents and discusses current understandings, challenging issues, and perspectives related to the diversity of LAL-products, which is willing to promote a deeper investigation and discussion on a clear clarification of the chemical reactions and particle nucleation/growth processes.

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Synthesis of colloidal silicon and germanium nanoparticles by laser ablation of solid Si and Ge targets in ethanol

Cited by 9 publications

References 22 publications

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

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

Bacterial Toxicity of Germanium Nanocrystals Induced by Doping with Boron and Phosphorus

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

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