Ligand-free gold–silver nanoparticle alloy polymer composites generated by picosecond laser ablation in liquid monomer

2012 ◽  
Vol 110 (2) ◽  
pp. 343-350 ◽  
Author(s):  
Ana Menéndez-Manjón ◽  
Andreas Schwenke ◽  
Timo Steinke ◽  
Matthias Meyer ◽  
Ulrich Giese ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Polymer Composites ◽  
Silver Nanoparticle ◽  
Picosecond Laser ◽  
Laser Ablation In Liquid ◽  
Free Gold ◽  
Gold Silver ◽  
Ligand Free

scholarly journals Ultrasmall, Ligand-Free Ag Nanoparticles with High Antibacterial Activity Prepared by Pulsed Laser Ablation in Liquid

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
László Kőrösi ◽  
Marina Rodio ◽  
Dora Dömötör ◽  
Tamás Kovács ◽  
Szilvia Papp ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Laser Ablation ◽  
Bacterial Resistance ◽  
Processing System ◽  
Picosecond Laser ◽  
Antimicrobial Activities ◽  
Ag Nps ◽  
Laser Ablation In Liquid ◽  
Vis Spectroscopy ◽  
Ligand Free

Since ancient times, silver and its compounds have been known to have a broad spectrum of antimicrobial activities for bacteria, fungi, and viruses. Due to the increasing bacterial resistance to classic antibiotics, the investigations of Ag NPs have increased. Herein, we present the preparation of ligand-free Ag NPs with 3 and 20 nm sizes by applying picosecond laser ablation in liquid at 355 and 1065 nm. Our laser processing system allows a high control on particle sizes. The produced nanoparticles were characterized by means of transmission electron microscopy, UV-Vis spectroscopy, and X-ray diffraction. The size effect on the antibacterial activity of Ag NPs was tested againstE. coliandS. aureus. The growth curves of bacteria were monitored at 0–5 mg/L of Ag NPs by a multimode microplate reader. The size effects as well as the concentration of Ag NPs on their antibacterial activity are discussed.

scholarly journals Fabrication of hybrid nanocomposite scaffolds by incorporating ligand-free hydroxyapatite nanoparticles into biodegradable polymer scaffolds and release studies

2015 ◽  
Vol 6 ◽  
pp. 2217-2223 ◽  
Author(s):  
Balazs Farkas ◽  
Marina Rodio ◽  
Ilaria Romano ◽  
Alberto Diaspro ◽  
Romuald Intartaglia ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Hydroxyapatite Nanoparticles ◽  
Free Standing ◽  
Laser Ablation In Liquid ◽  
Hybrid Thin Film ◽  
Liquid Polymer ◽  
Ligand Free ◽  
Poly Propylene

We report on the optical fabrication approach of preparing free-standing composite thin films of hydroxyapatite (HA) and biodegradable polymers by combining pulsed laser ablation in liquid and mask-projection excimer laser stereolithography (MPExSL). Ligand-free HA nanoparticles were prepared by ultrafast laser ablation of a HA target in a solvent, and then the nanoparticles were dispersed into the liquid polymer resin prior to the photocuring process using MPExSL. The resin is poly(propylene fumarate) (PPF), a photo-polymerizable, biodegradable material. The polymer is blended with diethyl fumarate in 7:3 w/w to adjust the resin viscosity. The evaluation of the structural and mechanical properties of the fabricated hybrid thin film was performed by means of SEM and nanoindentation, respectively, while the chemical and degradation studies were conducted through thermogravimetric analysis, and FTIR. The photocuring efficiency was found to be dependent on the nanoparticle concentration. The MPExSL process yielded PPF thin films with a stable and homogenous dispersion of the embedded HA nanoparticles. Here, it was not possible to tune the stiffness and hardness of the scaffolds by varying the laser parameters, although this was observed for regular PPF scaffolds. Finally, the gradual release of the hydroxyapatite nanoparticles over thin film biodegradation is reported.

scholarly journals Dynamics of silver nanoparticle formation and agglomeration inside the cavitation bubble after pulsed laser ablation in liquid

2013 ◽  
Vol 15 (9) ◽  
pp. 3068-3074 ◽  
Author(s):  
Philipp Wagener ◽  
Shyjumon Ibrahimkutty ◽  
Andreas Menzel ◽  
Anton Plech ◽  
Stephan Barcikowski
Keyword(s):  
Laser Ablation ◽  
Silver Nanoparticle ◽  
Cavitation Bubble ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Laser Ablation In Liquid ◽  
Nanoparticle Formation

scholarly journals Dendrimer-Capped Nanoparticles Prepared by Picosecond Laser Ablation in Liquid Environment

Molecules ◽  
2009 ◽  
Vol 14 (9) ◽  
pp. 3731-3753 ◽  
Author(s):  
Emilia Giorgetti ◽  
Anna Giusti ◽  
Francesco Giammanco ◽  
Paolo Marsili ◽  
Simona Laza
Keyword(s):  
Laser Ablation ◽  
Picosecond Laser ◽  
Laser Ablation In Liquid ◽  
Liquid Environment

scholarly journals Silver and Copper nano-colloid generation via Pulsed Laser Ablation in Liquid: Recirculation nanoparticle production mode

2021 ◽  
Author(s):  
Sithara Sreenilayam Pavithran ◽  
Ronan McCann ◽  
Éanna McCarthy ◽  
Brian Freeland ◽  
Karsten Fleischer ◽  
...  
Keyword(s):  
Particle Size ◽  
Laser Ablation ◽  
Average Particle Size ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Average Particle ◽  
Laser Ablation In Liquid ◽  
Wide Range ◽  
Ligand Free ◽  
Unique Chemical

Metal nanoparticles have unique chemical, physical, electrical, and optical properties that make them attractive for a wide range of applications in sensing, anti-fouling surfaces, medicine, and conductive inks. Pulsed Laser Ablation in Liquid (PLAL) is a green method of nanoparticle colloid production, capable of producing ligand-free nanoparticles in solution without the need for hazardous, environmentally unfriendly chemicals. Control of the process parameters can give control over the resulting colloid properties such as particle size distribution. In this work, silver (Ag) nanoparticles (NPs) with average particle size from 2.04 to 19.3 nm and copper (Cu) NPs with average particle size from 40 to 85.9 nm were produced by PLAL) technique.

scholarly journals Short-Pulse Lasers: A Versatile Tool in Creating Novel Nano-/Micro-Structures and Compositional Analysis for Healthcare and Wellbeing Challenges

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 712
Author(s):  
Ahmed Al-Kattan ◽  
David Grojo ◽  
Christophe Drouet ◽  
Alexandros Mouskeftaras ◽  
Philippe Delaporte ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Surface Engineering ◽  
Short Pulse ◽  
Chemical Properties ◽  
Compositional Analysis ◽  
Periodic Patterns ◽  
Laser Ablation In Liquid ◽  
Micro Scale ◽  
Direct Laser ◽  
Contact Free

Driven by flexibility, precision, repeatability and eco-friendliness, laser-based technologies have attracted great interest to engineer or to analyze materials in various fields including energy, environment, biology and medicine. A major advantage of laser processing relies on the ability to directly structure matter at different scales and to prepare novel materials with unique physical and chemical properties. It is also a contact-free approach that makes it possible to work in inert or reactive liquid or gaseous environment. This leads today to a unique opportunity for designing, fabricating and even analyzing novel complex bio-systems. To illustrate this potential, in this paper, we gather our recent research on four types of laser-based methods relevant for nano-/micro-scale applications. First, we present and discuss pulsed laser ablation in liquid, exploited today for synthetizing ultraclean “bare” nanoparticles attractive for medicine and tissue engineering applications. Second, we discuss robust methods for rapid surface and bulk machining (subtractive manufacturing) at different scales by laser ablation. Among them, the microsphere-assisted laser surface engineering is detailed for its appropriateness to design structured substrates with hierarchically periodic patterns at nano-/micro-scale without chemical treatments. Third, we address the laser-induced forward transfer, a technology based on direct laser printing, to transfer and assemble a multitude of materials (additive structuring), including biological moiety without alteration of functionality. Finally, the fourth method is about chemical analysis: we present the potential of laser-induced breakdown spectroscopy, providing a unique tool for contact-free and space-resolved elemental analysis of organic materials. Overall, we present and discuss the prospect and complementarity of emerging reliable laser technologies, to address challenges in materials’ preparation relevant for the development of innovative multi-scale and multi-material platforms for bio-applications.

scholarly journals Template-free, single step preparation of hollow Coo nano spheres using pulsed laser ablation in liquid environment

2021 ◽  
pp. 103317
Author(s):  
Muidh Alheshibri ◽  
Sultan Akhtar ◽  
Abbad Al Baroot ◽  
Khaled Elsayed ◽  
Hassan S Al Qahtani ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Single Step ◽  
Laser Ablation In Liquid ◽  
Liquid Environment ◽  
Template Free
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