Influence of the per pulse laser fluence on the optical properties of carbon nanoparticles synthesized by laser ablation of solids in liquids

Reyes-Contreras, D.; Camacho-López, M.A.; Camacho-López, Miguel A.; Camacho‐López, Santiago; Rodríguez-Beltrán, René I.; Mayorga-Rojas, M.

doi:10.1016/j.optlastec.2015.05.010

Cited by 41 publications

(25 citation statements)

References 29 publications

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“…Laser ablation method involves the absorption of highly energetic laser pulse by the carbon precursors and stripping of electrons from the atoms through a process like photoelectric effect generating a high electric field. Production of CDs takes place due to the repulsive force generated between positive ions and solid material [23,24]. The size of the CDs can be controlled by a laser furnace.…”

Section: Bottom-up Methodsmentioning

confidence: 99%

Naturally Derived Carbon Dots as Bioimaging Agents

Gedda¹,

Bhupathi²,

Tiruveedhi³

2021

Biomechanics and Functional Tissue Engineering

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The recent advances in nanoscience and technology have opened new avenues for carbon-based nanomaterials. Especially, Carbon dots (CDs) have gained significant attention due to their simple, economic and rapid green synthesis. These materials exhibit excellent water solubility, fluorescence emission, high fluorescence quantum yield, Ultraviolet (UV) to Infrared (IR) range absorbance and high bio-compatibility. Therefore, these materials are widely used for various biological applications including bio-imaging. With the integration and doping of surface passive agents and elements, respectively influenced the enhancement of fluorescence property of CDs. Also, the conjugation of receptor-based targeting ligands leads to targeted bioimaging. CDs in combination with other imaging contrast agents lead to the development of novel contrast agents for bimodal imaging and multimodal imaging techniques. The combination of diagnostic CDs with therapeutic agents resulted in the formation of theragnostic CDs for image guided therapies. In this chapter, a comprehensive view on the top-down and bottom–up green synthesis methods for naturally derived CDs discussed. Further, unique physical, chemical, optical and biological properties of CDs described. Finally, fluorescence based bimodal and multimodal imaging techniques also described.

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Section: Bottom-up Methodsmentioning

confidence: 99%

Naturally Derived Carbon Dots as Bioimaging Agents

Gedda¹,

Bhupathi²,

Tiruveedhi³

2021

Biomechanics and Functional Tissue Engineering

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“…The carbon allotropes have a crystalline phase with bonds consisting of sp 2 or sp 3 carbon, oxygen-or nitrogen-based groups, and post-modified chemical groups 7) . The synthesis of CNPs has been developed in various methods such as microwaves 8) , thermal decomposition 9) , ultrasonic synthesis 10) , or chemical vapor deposition 11) , electrochemical methods 12) , laser ablation 13) , coaxial arc plasma deposition (CAPD) 14) , and arc discharge 15) .…”

Section: Introductionmentioning

confidence: 99%

The Structural Characteristics of Carbon Nanoparticles Produced by Arc Discharge in Toluene Without Added Catalyst or Gases

Andhika¹,

Saraswati²,

Hastuti³

2020

Evergreen

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Carbon nanoparticles (CNPs) have been intensively explored due to their wide applications. One of the cost-effective synthesis techniques is arc discharge in liquid, which produces various carbon nanostructures depending on environmental conditions such as catalyst and gases. The use of organic compound, e.g., toluene, acts as a carbon source for carbon nanoparticle growth. However, the carbon structure examinations of the CNPs product deposited in different spots produced by arc discharge in toluene without added catalyst and gases have not been studied in detail. Therefore, the present study investigates the structural characteristics of CNPs produced by arc discharge in pure toluene using Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy equipped by electron dispersive spectroscopy (SEM-EDS) transmission electron microscope (TEM) imaging data. The nanoparticles were collected by scraping powder from four different spots: the electrode handles; the space between the electrodes; in the liquid medium; and at the bottom of the reaction chamber. The C(002) peak analyzed in the diffraction pattern of CNPs collected in these locations shows different intensities and features. The CNPs formed between the electrodes had the most crystalline graphitic structures. The Fourier transform infrared (FTIR) spectra show differences in the C−H absorption, especially for CNPs dissolved in toluene, suggested contains fullerene and its organic hydrocarbon fragments. Moreover, a Raman analysis shows significant differences between the CNPs deposited between the electrodes and those collected from the bottom of the glass chamber, which validates the FTIR, XRD, and TEM imaging data. The powder deposited between the electrodes seems to take the form of CNPs with better graphitic structures; meanwhile, powder collected from the other spots were analyzed to be hydrogenated diamond-like carbon and glassy bulk carbon.

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“…Ponce et al (2016) presentan un método basado en LIBS que compara con espectroscopia de absorción atómica (AAS, atomic absorption spectroscopy) para el monitoreo de los elementos Pb y Cu en peces comestibles. El grupo integrado por Camacho-López et al, (2014), Escobar-Alarcón et al, (2007, Reyes-Contreras et al (2015), Venegas-Castro et al (2016) han trabajado con diferentes técnicas espectroscópicas, incluyendo LIBS.…”

Section: Introductionunclassified