Applications of Shaped Femtosecond near-IR Laser Irradiation in the Generation of Metal Nanoparticles

2014 ◽  
Vol 1654 ◽  
Author(s):  
Behzad Tangeysh ◽  
Katharine Moore Tibbetts ◽  
Johanan H. Odhner ◽  
Bradford B. Wayland ◽  
Robert J. Levis
Keyword(s):  
Gold Nanoparticles ◽  
Metal Nanoparticles ◽  
Laser Irradiation ◽  
Reaction Medium ◽  
Metal Nanoparticle ◽  
Near Ir ◽  
Ir Laser ◽  
Spherical Gold Nanoparticles ◽  
Poly Ethylene ◽  
Polymer Surfactants

ABSTRACTFemtosecond near IR laser irradiation is explored as a general methodology to produce metal nanoparticles from metal precursor solutions. Initial studies of the formation and transformations of gold nanoparticles in aqueous solution are used as model processes to evaluate the effects of laser parameters, reaction medium and surfactants in controlling metal nanoparticle formation. The addition of polymer surfactants such as poly(ethylene glycol) (PEG) was found to significantly accelerate Au(III) reduction as compared to surfactant-free systems. Photo-reduction for aqueous solutions of Au(III) in the presence of PEG results in relatively small narrowly dispersed spherical gold nanoparticles compared to relatively large well-formed crystalline nanoparticles that are observed in the absence of surfactants. Varying the concentration of PEG is an effective approach to tune the diameter and size distribution from 3.9±0.7 nm to 11±2.4 nm for Au nanoparticles produced by laser processing.

Enormous Size Growth of Thiol-passivated Gold Nanoparticles Induced by Near-IR Laser Light

2000 ◽  
Vol 29 (4) ◽  
pp. 310-311 ◽  
Author(s):  
Yasuro Niidome ◽  
Ayako Hori ◽  
Takuro Sato ◽  
Sunao Yamada
Keyword(s):  
Gold Nanoparticles ◽  
Laser Light ◽  
Near Ir ◽  
Ir Laser ◽  
Size Growth

Delayed ejection of cluster ions from a liquid–water beam following Mid-IR and Near-IR laser irradiation

2008 ◽  
Vol 459 (1-6) ◽  
pp. 194-197
Author(s):  
Namiki Toyama ◽  
Jun-ya Kohno ◽  
Tamotsu Kondow
Keyword(s):  
Laser Irradiation ◽  
Liquid Water ◽  
Cluster Ions ◽  
Near Ir ◽  
Ir Laser

ChemInform Abstract: Enormous Size Growth of Thiol-Passivated Gold Nanoparticles Induced by Near-IR Laser Light.

ChemInform ◽  
2010 ◽  
Vol 31 (33) ◽  
pp. no-no
Author(s):  
Yasuro Niidome ◽  
Ayako Hori ◽  
Takuro Sato ◽  
Sunao Yamada
Keyword(s):  
Gold Nanoparticles ◽  
Laser Light ◽  
Near Ir ◽  
Ir Laser ◽  
Size Growth

scholarly journals The Photobiomodulation of Vital Parameters of the Cancer Cell Culture by Low Dose of Near-IR Laser Irradiation

2019 ◽  
Vol 25 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Anna Khokhlova ◽  
Edik U. Rafailov ◽  
Igor Zolotovskii ◽  
Dmitrii Stoliarov ◽  
Svetlana Vorsina ◽  
...  
Keyword(s):  
Cell Culture ◽  
Laser Irradiation ◽  
Cancer Cell ◽  
Low Dose ◽  
Near Ir ◽  
Ir Laser ◽  
Vital Parameters

Plant Extracts Promoted Preparation of Silver and Gold Nanoparticles: A Systematic Review

NANO ◽  
2020 ◽  
Vol 15 (02) ◽  
pp. 2030001 ◽  
Author(s):  
Manobjyoti Bordoloi ◽  
Ranjan K. Sahoo ◽  
Kashyap J. Tamuli ◽  
Surovi Saikia ◽  
Partha P. Dutta
Keyword(s):  
Gold Nanoparticles ◽  
Physicochemical Properties ◽  
Metal Nanoparticles ◽  
Plant Extracts ◽  
Metallic Nanoparticles ◽  
Biological Activities ◽  
Biological Effects ◽  
Metal Nanoparticle ◽  
High Rate ◽  
Silver And Gold Nanoparticles

Eco-friendly synthesis of metal nanoparticles has accrued utmost interest by researchers in the last decade for their distinct properties making them applicable in different fields of science and technology. With regard to its low cost, low environmental effect, zero contamination and higher reducing potential, their synthesis by green chemistry procedure is an emerging area in nanobiotechnology. Plant-based nanoparticles produced are more stable, with high rate of synthesis and are suitable for large scale biosynthesis as compared to the use of microorganisms which require stringent control on cell cultures. Plant-based nanoparticles have advantages over other methods due to presence of biomolecules acting both as capping and reducing agents by increasing the rate of reduction and stabilization of nanoparticles. Furthermore, secondary metabolites present in plants are used for reducing metal ions in single step reaction. In this review paper, we have cited 265 research articles and have outlined 106 plant extract assisted gold and silver nanoparticles. The present review highlights the achievements of metal nanoparticle synthesis, especially silver and gold nanoparticles from plant extracts, along with factors liable for the synthesis of metal nanoparticles. It also focuses on the dye degrading properties and various biological activities of metal nanoparticles, their antimicrobial mechanism of action and the physicochemical properties that influence the biological effects of metallic nanoparticles. Biological activities of metal nanoparticles were also described, including the effect of physicochemical properties of metal nanoparticles on biological activities.

A meta-analysis of the efficiency of metal nanoparticles in vaccine delivery against infectious disease

Nanomedicine ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. 481-495
Author(s):  
Zakieh Sadat Hoseini ◽  
Abbas Hajizade ◽  
Andrew J Easton ◽  
Gholamreza Ahmadian ◽  
Fatemeh Ramezani
Keyword(s):  
Infectious Disease ◽  
Gold Nanoparticles ◽  
Survival Rate ◽  
Metal Nanoparticles ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Metal Nanoparticle ◽  
Data Sources ◽  
Eligibility Criteria

Background: Exploration of the efficiency of metal nanoparticles as adjuvants have reported varying results. Objective: The efficacy of metal nanoparticles as adjuvants was investigated Data sources: Database were searched using the terms ‘metal nanoparticles’ and ‘vaccines’. Study eligibility criteria: Studies in animal models utilizing any metal-based vaccines, where the survival rate was described. Study appraisal: The quality of the studies was examined using aspects of the ARRIVE guidelines and assessment of the risk of bias of included studies. Results: Metal nanoparticle-based adjuvants were more effective compared with control (unvaccinated groups) but have not been more successful in competing with common adjuvants or even antigens alone. Limitation: More than 75% of articles have used only gold nanoparticles. Conclusion: Nano-adjuvants do not have a significant effect on reducing mortality.

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