Pulsed nanosecond laser ablation of gold in deionized water and aqueous chitosan solution

Barry, Matthew; Ding, Bo; Jung, Young-Soo; Reddy, B Vinod Kumar N Harish; Phuoc, Tran X.; Chyu, Minking K.

doi:10.1016/j.optlaseng.2013.10.019

Cited by 10 publications

(7 citation statements)

References 39 publications

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“…Although encapsulated NPs are small, and the colloid is typically very stable, their hydrodynamic diameters are enlarged (and their zeta potential, which is indicative of the particle mobility, is screened) by the polymer capsule . In addition to chemical polymers, interest in studying the size-quenching effect of biopolymers, such as albumin, ,, starch, , gelatin, , and chitosan, − is increasing because of their excellent biocompatibility and biodegradability. The dispersions and sizes of AgNPs and AuNPs prepared by laser ablation in such biopolymer-containing solutions have been found to be narrower and smaller than those prepared in neat water. , These results constitute the basis for the single-step synthesis of NP–biopolymer composites.…”

Section: Size Controlmentioning

confidence: 99%

Laser Synthesis and Processing of Colloids: Fundamentals and Applications

2017

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Driven by functionality and purity demand for applications of inorganic nanoparticle colloids in optics, biology, and energy, their surface chemistry has become a topic of intensive research interest. Consequently, ligand-free colloids are ideal reference materials for evaluating the effects of surface adsorbates from the initial state for application-oriented nanointegration purposes. After two decades of development, laser synthesis and processing of colloids (LSPC) has emerged as a convenient and scalable technique for the synthesis of ligand-free nanomaterials in sealed environments. In addition to the high-purity surface of LSPC-generated nanoparticles, other strengths of LSPC include its high throughput, convenience for preparing alloys or series of doped nanomaterials, and its continuous operation mode, suitable for downstream processing. Unscreened surface charge of LSPC-synthesized colloids is the key to achieving colloidal stability and high affinity to biomolecules as well as support materials, thereby enabling the fabrication of bioconjugates and heterogeneous catalysts. Accurate size control of LSPC-synthesized materials ranging from quantum dots to submicrometer spheres and recent upscaling advancement toward the multiple-gram scale are helpful for extending the applicability of LSPC-synthesized nanomaterials to various fields. By discussing key reports on both the fundamentals and the applications related to laser ablation, fragmentation, and melting in liquids, this Article presents a timely and critical review of this emerging topic.

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Section: Size Controlmentioning

confidence: 99%

Laser Synthesis and Processing of Colloids: Fundamentals and Applications

2017

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“…Gold nanoparticles are interesting materials due to their unique chemical and physical properties , and they can be applied in many areas of science, e.g., medicine , catalysis , and materials engineering . Today, the process of particles synthesis is well known , and in principle it can be divided into chemical and physical methods . Each method allows for efficient particles synthesis with a different range of size, shape, and uniformity .…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticles Formation via Au(III) Complex Ions Reduction with l -Ascorbic Acid

Luty–Błocho

Wojnicki

Fitzner

2017

Int. J. Chem. Kinet.

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In this paper, the kinetics and mechanism of gold nanoparticles formation during the redox reaction between [AuCl 4 ]¯complex and L-ascorbic acid under different conditions were described. It was also shown that reagent concentration, chloride ions, and pH influence kinetics of nucleation and growth. To establish rate constants of these stages, the model of Finke and Watzky was applied. From Arrhenius and Eyring dependencies, the values of activation energy (22.5 kJ mol −1 for the nucleation step and 30.3 kJ mol −1 for the growth step), entropy (about −228 J K −1 mol −1 for the nucleation step and −128 J K −1 mol −1 for the growth step), and enthalpy (19.8 kJ mol −1 for nucleation and 27.8 kJ mol −1 for particles growth) were determined. It was also shown that the disproporationation reaction had influence on the rate of nanoparticles formation and may have impact on final particles morphology. C 2017 Wiley Periodicals, Inc. Int J Chem Kinet 49: [789][790][791][792][793][794][795][796][797] 2017

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“…In particular, metal-chitosan (Me-CS) composites have many fascinating applications in catalysis, biosensors and biomaterials [ 24 , 25 ]. A number of studies have been issued on CS combination with different inorganic nanostructures, such as Pd [ 26 , 27 ], Au [ 28 , 29 , 30 , 31 , 32 ], Ag and its compounds [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], Pt [ 27 , 41 ], Fe and its oxides [ 42 , 43 , 44 ], ZnO [ 20 , 45 , 46 ], zeolite [ 47 ], silica [ 48 ] and graphene [ 49 ], just to cite a few. The inclusion of copper nanophases in CS matrix is quite diffused, as well [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions

et al. 2016

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Copper-chitosan (Cu-CS) nanoantimicrobials are a novel class of bioactive agents, providing enhanced and synergistic efficiency in the prevention of biocontamination in several application fields, from food packaging to biomedical. Femtosecond laser pulses were here exploited to disrupt a Cu solid target immersed into aqueous acidic solutions containing different CS concentrations. After preparation, Cu-CS colloids were obtained by tuning both Cu/CS molar ratios and laser operating conditions. As prepared Cu-CS colloids were characterized by Fourier transform infrared spectroscopy (FTIR), to study copper complexation with the biopolymer. X-ray photoelectron spectroscopy (XPS) was used to elucidate the nanomaterials’ surface chemical composition and chemical speciation of the most representative elements. Transmission electron microscopy was used to characterize nanocolloids morphology. For all samples, ξ-potential measurements showed highly positive potentials, which could be correlated with the XPS information. The spectroscopic and morphological characterization herein presented outlines the characteristics of a technologically-relevant nanomaterial and provides evidence about the optimal synthesis parameters to produce almost monodisperse and properly-capped Cu nanophases, which combine in the same core-shell structure two renowned antibacterial agents.

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Pulsed nanosecond laser ablation of gold in deionized water and aqueous chitosan solution

Cited by 10 publications

References 39 publications

Laser Synthesis and Processing of Colloids: Fundamentals and Applications

Laser Synthesis and Processing of Colloids: Fundamentals and Applications

Gold Nanoparticles Formation via Au(III) Complex Ions Reduction with l -Ascorbic Acid

Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions

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