scholarly journals Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
S. Chervinskii ◽  
R. Drevinskas ◽  
D. V. Karpov ◽  
M. Beresna ◽  
A. A. Lipovskii ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Aspect Ratio ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Spherical Shape ◽  
Soda Lime ◽  
Prolate Spheroid ◽  
Soda Lime Glass ◽  
Experimental Conditions ◽  
Glass Metal

Abstract We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

scholarly journals Condensation of Si-rich region inside soda-lime glass by parallel femtosecond laser irradiation

2014 ◽  
Vol 22 (13) ◽  
pp. 16493 ◽  
Author(s):  
Masaaki Sakakura ◽  
Kouhei Yoshimura ◽  
Torataro Kurita ◽  
Masahiro Shimizu ◽  
Yasuhiko Shimotsuma ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Soda Lime ◽  
Femtosecond Laser Irradiation ◽  
Soda Lime Glass ◽  
Rich Region

Flower-like Na2O nanotip synthesis via femtosecond laser ablation of glass

2021 ◽  
Author(s):  
Champika Samarasekera ◽  
Bo Tan ◽  
Krishnan Venkatakrishnan
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Materials Science ◽  
Femtosecond Laser Ablation ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Soda Lime Glass Substrate ◽  
Current State ◽  
Condition Method ◽  
20 Nm

The current state-of-the-art in nanotip synthesis relies on techniques that utilize elaborate precursor chemicals, catalysts, or vacuum conditions, and any combination thereof. To realize their ultimate potential, synthesized nanotips require simpler fabrication techniques that allow for control over their final nano-morphology. We present a unique, dry, catalyst-free, and ambient condition method for creating densely clustered, flower-like, sodium oxide (Na2O) nanotips with controllable tip widths. Femtosecond laser ablation of a soda-lime glass substrate at a megahertz repetition rate, with nitrogen flow, was employed to generate nanotips with base and head widths as small as 100 and 20 nm respectively, and lengths as long as 10 μm. Control of the nanotip widths was demonstrated via laser dwell time with longer dwell times producing denser clusters of thinner nanotips. Energy dispersive X-ray analysis reveals that nanotip composition is Na2O. A new formation mechanism is proposed, involving an electrostatic effect between ionized nitrogen and polar Na2O. The synthesized nanotips may potentially be used in antibacterial and hydrogen storage applications. PACS: 81 Materials science; 81.07.-b nanoscale materials and structures: fabrication and characterization; 81.16.-c methods of micro- and nanofabrication and processing

scholarly journals Experimental Investigation Of Nanostructures Generated On Glasses Using A MHz Femtosecond Laser

2021 ◽  
Author(s):  
Dheeraj Vipparty
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Dwell Time ◽  
Three Dimensional ◽  
Soda Lime ◽  
Femtosecond Laser Irradiation ◽  
Soda Lime Glass ◽  
Ambient Conditions ◽  
Nanoparticle Agglomerate ◽  
Insight Into

This dissertation reports the synthesis of unique Si0₂ based nanostructures by exposing glass samples to MHz repletion rate femtosecond laser irradiation. A three-dimensional fibrous nanoparticle agglomerate network was observed on soda-lime glass (73% SiO + other compounds) when exposed to femtosecond laser irradiation at 8.4 MHz and 12.6 MHz repetition rate and 0.5 ms dwell time, in air. By irradiating silica glass (96% SiO₂+ trace elements) sample under ambient conditions with femtosecond pulses at 12.6 MHz and dwell time in excess of 3.0 ms; long continuous nanofibers of extremely high aspect ration (certain fibers up to 100000:1) were obtained. The mechanisms that promote such nanostructures with distinct morphologies have been explored. A deeper insight into the fundamentals of femtosecond laser interaction with dielectrics led to the understanding that variations in bandgap alters ablation dynamics and dictates the response of glass to femtosecond laser irradiation, ultimately resulting in the formation of structures with dissimilar morphology on silica and soda-lime glass.

On the Law of Spontaneous Spreading of Liquid Droplets on Solid Substrates

2002 ◽  
Author(s):  
Abdullatif M. Alteraifi ◽  
Dalia Sherif ◽  
Abdelsamie Moet
Keyword(s):  
Surface Tension ◽  
Spherical Shape ◽  
Soda Lime ◽  
Solid Substrate ◽  
Contact Radius ◽  
Soda Lime Glass ◽  
Image Analysis System ◽  
Liquid Droplets ◽  
Viscous Forces ◽  
Wide Range

Several theories deal with the spreading kinetics of liquids on solid substrate, notable amongst which is de Gennes’ law, which relates the contact radius, R, to the droplet volume, V, the surface tension, σ, and the viscosity, µ, by the equation R3m+1 = (σ/µ) t Vm and ascertains that m = 3 is “indeed expected theoretically for all cases of dry spreading”. Validity of the proposed models is examined by measurements of the spreading of a number of liquids exhibiting a wide range of surface tension and viscosity on dry soda-lime glass. The measurements used a small droplet of constant volume to minimize gravitational effects. The droplet was released near the glass surface from automatic micro syring, supported on micromanipulator. The contact radius was acquired as a function of time by an image analysis system. Analyzed in terms of de Gennes law, it was noted that the m values for silicone oils fall within the suggested variance i.e., m = 3.0±0.5. However, significant disagreements were noted in the case of other liquids, where m ranged from 5.2 to 15.0 with no correlation with the parameters included. Mechanistic considerations suggest that whereas the surface tension acts to retain the spherical shape of the droplet, interfacial tension acts to maximize the contact area whereas the viscous forces determine the kinetics. The magnitude of the difference between the interfacial and surface energies likely determines whether spreading is complete or incomplete.

scholarly journals Experimental Investigation Of Nanostructures Generated On Glasses Using A MHz Femtosecond Laser

2021 ◽  
Author(s):  
Dheeraj Vipparty
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Dwell Time ◽  
Three Dimensional ◽  
Soda Lime ◽  
Femtosecond Laser Irradiation ◽  
Soda Lime Glass ◽  
Ambient Conditions ◽  
Nanoparticle Agglomerate ◽  
Insight Into

This dissertation reports the synthesis of unique Si0₂ based nanostructures by exposing glass samples to MHz repletion rate femtosecond laser irradiation. A three-dimensional fibrous nanoparticle agglomerate network was observed on soda-lime glass (73% SiO + other compounds) when exposed to femtosecond laser irradiation at 8.4 MHz and 12.6 MHz repetition rate and 0.5 ms dwell time, in air. By irradiating silica glass (96% SiO₂+ trace elements) sample under ambient conditions with femtosecond pulses at 12.6 MHz and dwell time in excess of 3.0 ms; long continuous nanofibers of extremely high aspect ration (certain fibers up to 100000:1) were obtained. The mechanisms that promote such nanostructures with distinct morphologies have been explored. A deeper insight into the fundamentals of femtosecond laser interaction with dielectrics led to the understanding that variations in bandgap alters ablation dynamics and dictates the response of glass to femtosecond laser irradiation, ultimately resulting in the formation of structures with dissimilar morphology on silica and soda-lime glass.

Color center formation in soda lime glass and NaCl single crystals with femtosecond laser pulses

2004 ◽  
Vol 79 (4-6) ◽  
pp. 859-864 ◽  
Author(s):  
J.T. Dickinson ◽  
S. Orlando ◽  
S.M. Avanesyan ◽  
S.C. Langford
Keyword(s):  
Femtosecond Laser ◽  
Single Crystals ◽  
Color Center ◽  
Soda Lime ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Soda Lime Glass

Color center formation in soda-lime glass with femtosecond laser pulses

2003 ◽  
Vol 94 (7) ◽  
pp. 4332-4340 ◽  
Author(s):  
J. B. Lonzaga ◽  
S. M. Avanesyan ◽  
S. C. Langford ◽  
J. T. Dickinson
Keyword(s):  
Femtosecond Laser ◽  
Color Center ◽  
Soda Lime ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Soda Lime Glass

A Practical Procedure for Measuring Contact Angles in Wettability Studies by the Sessile Drop Method

MRS Advances ◽  
2019 ◽  
Vol 4 (57-58) ◽  
pp. 3143-3152
Author(s):  
J. López-Cuevas ◽  
M.I. Pech-Canul ◽  
J.L. Rodríguez-Galicia ◽  
J.C. Rendón-Angeles
Keyword(s):  
Liquid Drop ◽  
Sessile Drop ◽  
Reactive Systems ◽  
Soda Lime ◽  
Solid Substrate ◽  
Contact Angles ◽  
Sessile Drop Method ◽  
Soda Lime Glass ◽  
Experimental Conditions ◽  
Drop Method

ABSTRACTAn old procedure used to carry out a graphical derivation of curves, which is based on the optical properties of plane mirrors, has been adapted for the measurement of the contact angle (θ) formed between a liquid drop and a flat solid substrate in wettability experiments carried out by the so-called “sessile drop” method. The method was tested for mercury on soda-lime glass at room temperature in air as well as for Cusil (Ag-28wt.%Cu) and Incusil-ABA (Ag-27wt.%Cu-12wt.%In-2wt.%Ti) brazing alloys on pressureless-sintered silicon carbide (PLS-SiC) at 850 °C, under a vacuum of 10-4/10-5 Torr. The proposed method is fast, simple and accurate enough from high (∼140°) to relatively low (∼10°) contact angles. Although the proposed method has been tested for metal-ceramic systems, it is of general application, so that it would be useful for any liquid-solid system. The method is applicable for any temperature, pressure and atmospheric experimental conditions employed, as well as for any chemical composition of liquid and solid. It is also useful for both low and high contact angles, as well as for reactive and non-reactive systems, as long as a photograph of a liquid drop resting on a flat solid surface is available for the studied system.

Holographic fabrication of multiple layers of grating inside soda–lime glass with femtosecond laser pulses

2002 ◽  
Vol 80 (9) ◽  
pp. 1508-1510 ◽  
Author(s):  
Yan Li ◽  
Wataru Watanabe ◽  
Kazuhiro Yamada ◽  
Taishi Shinagawa ◽  
Kazuyoshi Itoh ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Soda Lime ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Soda Lime Glass
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