<i>In situ</i> synthesis of polyynes in a polymer matrix <i>via</i> pulsed laser ablation in a liquid

Peggiani, Sonia; Facibeni, Anna; Milani, Alberto; Castiglioni, Chiara; Russo, Valeria; Bassi, Andrea; Casari, Carlo Spartaco

doi:10.1039/d0ma00545b

Cited by 12 publications

(6 citation statements)

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“…However, the poor colloidal stability of the obtained LCCs leads to reorganization phenomena via crosslinking reaction in sp

structures [ 27 ]. To overcome this limit, the employment of spacers at the end of an sp-carbon chain, such as the embedding of these carbon chains in solid matrices (PVA, SiO

, metal nanoparticles), is an efficient strategy that helps to avoid sample degradation [ 28 , 29 , 30 , 31 , 32 , 33 ]. As reported by Pan et al [ 34 ], the carbon-hydrogen bonds in carbyne can be cleaved with the help of gold catalysts under the favorable thermodynamic environment provided by PLAL and because the unique configuration of two carbon atoms in an alcohol molecule matches the elementary entity of carbyne.…”

Section: Introductionmentioning

confidence: 99%

Nano-Hybrid Au@LCCs Systems Displaying Anti-Inflammatory Activity

et al. 2022

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Gold nanoparticles (Au NPs) have received great attention owing to their biocompatible nature, environmental, and widespread biomedical applications. Au NPs are known as capable to regulate inflammatory responses in several tissues and organs; interestingly, lower toxicity in conjunction with anti-inflammatory effects was reported to occur with Au NPs treatment. Several variables drive this benefit-risk balance, including Au NPs physicochemical properties such as their morphology, surface chemistry, and charge. In our research we prepared hybrid Au@LCC nanocolloids by the Pulsed Laser Ablation, which emerged as a suitable chemically clean technique to produce ligand-free or functionalized nanomaterials, with tight control on their properties (product purity, crystal structure selectivity, particle size distribution). Here, for the first time to our knowledge, we have investigated the bioproperties of Au@LCCs. When tested in vitro on intestinal epithelial cells exposed to TNF-α, Au@LCCs sample at the ratio of 2.6:1 showed a significantly reduced TNF gene expression and induced antioxidant heme oxygenase-1 gene expression better than the 1:1 dispersion. Although deeper investigations are needed, these findings indicate that the functionalization with LCCs allows a better interaction of Au NPs with targets involved in the cell redox status and inflammatory signaling.

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“…However, the poor colloidal stability of the obtained LCCs leads to reorganization phenomena via crosslinking reaction in sp

structures [ 27 ]. To overcome this limit, the employment of spacers at the end of an sp-carbon chain, such as the embedding of these carbon chains in solid matrices (PVA, SiO

Section: Introductionmentioning

confidence: 99%

Nano-Hybrid Au@LCCs Systems Displaying Anti-Inflammatory Activity

et al. 2022

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“…Water is a low-cost and environmentally friendly solvent for the synthesis of polyynes by PLAL which was employed as it is [42,63,71,[90][91][92]102] or to obtain aqueous solutions [11,93,94].…”

Section: Water and Aqueous Solutionsmentioning

confidence: 99%

“…The second one is based on the dipping of a PVA film in a solution of boric acid and polyynes by PLAL [116]. The last approach is the method developed in our laboratory in which polyynes were directly produced in a polymeric solution, where PLAL was performed [11,79,117].…”

Section: Sp-carbon Chains-based Nanocompositesmentioning

confidence: 99%

“…For the first time, we synthesized polyynes by performing the laser ablation in a solution in which PVA was already dissolved [11]. The choice to employ the polymer directly in the ablation solution (see Figure 6a) can be justified by the following reasons.…”

Section: Sp-carbon Chains-based Nanocompositesmentioning

confidence: 99%

“…Thanks to this versatility the research on the synthesis of polyynes by PLAL has seen advances in the last 15 years in terms of control of the produced polyynes, maximum length achieved, and understanding of the formation mechanisms by in situ characterization. Moreover, PLAL has been shown to produce polyynes in a polymeric solution for the realization of nanocomposites [11]. Here we review the status and progress made in the synthesis of polyynes by PLAL with a focus on the role of the main process parameters in the polyyne formation.…”

Section: Introductionmentioning

confidence: 99%

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Pulsed laser ablation in liquid of sp-carbon chains: Status and recent advances

Marabotti

Peggiani²,

Vidale³

et al. 2022

Chinese Phys. B

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This review provides a discussion of the current state of research on sp-carbon chains synthesized by pulsed laser ablation in liquid. In recent years, pulsed laser ablation in liquid (PLAL) has been widely employed for polyynes synthesis thanks to its flexibility with varying laser parameters, solvents, and targets. This allows the control of sp-carbon chains properties as yield, length, termination and stability. Although many reviews related to PLAL have been published, a comprehensive work reporting the current status and advances related to the synthesis of sp-carbon chains by PLAL is still missing. Here we first review the principle of PLAL and the mechanisms of formation of sp-carbon chains. Then we discuss the role of laser fluence (i.e. energy density), solvent, and target for sp-carbon chains synthesis. Lastly, we report the progress related to the prolonged stability of sp-carbon chains by PLAL encapsulated in polymeric matrices. This review will be a helpful guide for researchers interested in synthesizing sp-carbon chains by PLAL.

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Exploring the Growth Dynamics of Size‐Selected Carbon Atomic Wires with In Situ UV Resonance Raman Spectroscopy

Marabotti,

Peggiani,

Melesi

et al. 2024

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Short carbon atomic wires, the prototypes of the lacking carbon allotrope carbyne, represent the fundamental 1D system and the first stage in carbon nanostructure growth, which still exhibits many open points regarding their growth and stability. An in situ UV resonance Raman approach is introduced for real‐time monitoring of the growth of carbon atomic wires during pulsed laser ablation in liquid without perturbing the synthesis environment. Single‐chain species’ growth dynamics are tracked, achieving size selectivity by exploiting the peculiar optoelectronic properties of carbon wires and the tunability of synchrotron radiation. Diverse solvents are systematically explored, finding size‐ and solvent‐dependent production rates linked to the solvent's C/H ratio and carbonization tendency. Carbon atomic wires’ growth dynamics reveal a complex interplay between formation and degradation, leading to an equilibrium. Water, lacking in carbon atoms and reduced polyynes solubility, yields fewer wires with rapid saturation. Organic solvents exhibit enhanced productivity and near‐linear growth, attributed to additional carbon from solvent dissociation and low relative polarity. Exploring the dynamics of the saturation regime provides new insights into advancing carbon atomic wires synthesis via PLAL. Understanding carbon atomic wires’ growth dynamics can contribute to optimizing PLAL processes for nanomaterial synthesis.

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In situ synthesis of polyynes in a polymer matrix via pulsed laser ablation in a liquid

Abstract: Polyynes are finite chains formed by sp-hybridized carbon atoms with alternating single and triple bonds and displaying intriguing electronic and optical properties. Pulsed laser ablation in liquid (PLAL) is a...

Cited by 12 publications

References 58 publications

Nano-Hybrid Au@LCCs Systems Displaying Anti-Inflammatory Activity

Nano-Hybrid Au@LCCs Systems Displaying Anti-Inflammatory Activity

Pulsed laser ablation in liquid of sp-carbon chains: Status and recent advances

Exploring the Growth Dynamics of Size‐Selected Carbon Atomic Wires with In Situ UV Resonance Raman Spectroscopy

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