scholarly journals Double- and Multi-Femtosecond Pulses Produced by Birefringent Crystals for the Generation of 2D Laser-Induced Structures on a Stainless Steel Surface

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1257 ◽  
Author(s):  
Fotis Fraggelakis ◽  
Giuseppe Giannuzzi ◽  
Caterina Gaudiuso ◽  
Inka Manek-Hönninger ◽  
Girolamo Mincuzzi ◽  
...  
Keyword(s):  
Double Pulse ◽  
Process Window ◽  
Optimum Process ◽  
Stainless Steel Surface ◽  
Pulse Irradiation ◽  
Pulse Delay ◽  
Force Microscopy ◽  
Novel Approach ◽  
Birefringent Crystals ◽  
Pulse Polarization

Laser-induced textures have been proven to be excellent solutions for modifying wetting, friction, biocompatibility, and optical properties of solids. The possibility to generate 2D-submicron morphologies by laser processing has been demonstrated recently. Employing double-pulse irradiation, it is possible to control the induced structures and to fabricate novel and more complex 2D-textures. Nevertheless, double-pulse irradiation often implies the use of sophisticated setups for modifying the pulse polarization and temporal profile. Here, we show the generation of homogeneous 2D-LIPSS (laser-induced periodic surface structures) over large areas utilizing a simple array of birefringent crystals. Linearly and circularly polarized pulses were applied, and the optimum process window was defined for both. The results are compared to previous studies, which include a delay line, and the reproducibility between the two techniques is validated. As a result of a systematic study of the process parameters, the obtained morphology was found to depend both on the interplay between fluence and inter-pulse delay, as well as on the number of incident pulses. The obtained structures were characterized via SEM (scanning electron microscopy) and atomic force microscopy. We believe that our results represent a novel approach to surface structuring, primed for introduction in an industrial environment.

Double-pulse femtosecond laser peening of aluminum alloy AA5038: Effect of inter-pulse delay on transient optical plume emission and final surface micro-hardness

2016 ◽  
Vol 109 (21) ◽  
pp. 211902 ◽  
Author(s):  
E. I. Ageev ◽  
V. Yu. Bychenkov ◽  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
A. A. Petrov ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Femtosecond Laser ◽  
Double Pulse ◽  
Laser Peening ◽  
Micro Hardness ◽  
Pulse Delay ◽  
Final Surface ◽  
Plume Emission

A novel approach for measuring the intrinsic nanoscale thickness of polymer brushes by means of atomic force microscopy: application of a compressible fluid model

Nanoscale ◽  
2013 ◽  
Vol 5 (23) ◽  
pp. 11679 ◽  
Author(s):  
José Luis Cuellar ◽  
Irantzu Llarena ◽  
Jagoba J. Iturri ◽  
Edwin Donath ◽  
Sergio Enrique Moya
Keyword(s):  
Atomic Force Microscopy ◽  
Compressible Fluid ◽  
Polymer Brushes ◽  
Fluid Model ◽  
Force Microscopy ◽  
Atomic Force ◽  
Novel Approach

scholarly journals An Investigative Study on the Effect of Pre-Coating Polymer Solutions on the Fabrication of Low Cost Anti-Adhesive Release Paper

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1436
Author(s):  
Semen Vasilev ◽  
Andrey Vodyashkin ◽  
Daria Vasileva ◽  
Pavel Zelenovskiy ◽  
Dmitry Chezganov ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Low Cost ◽  
Polymer Coatings ◽  
Adhesive Properties ◽  
Base Surface ◽  
Force Microscopy ◽  
Base Paper ◽  
Pulp Paper ◽  
Novel Approach ◽  
Spectroscopy Studies

This work describes a novel approach to produce high quality release paper at lower cost than traditional methods. The anti-adhesive properties of release paper require the use of expensive machine glazed kraft or “Glassine” paper as the paper base. A series of polymer coatings including polyvinyl alcohol, carboxymethyl cellulose, polyethylene vinyl acetate, and polystyrene were chemically synthesized and coated onto a low cost pulp paper base. Surface roughness (Sa) and smoothness coefficients (k) were determined by atomic force microscopy (AFM), and the interactions between the polymer coating and base paper were investigated by Raman spectroscopy. Studies show the use of polyethylene vinyl acetate (PEVA) as a pre-coating layer on low cost pulp paper exhibits similar anti-adhesive properties as higher cost paper bases. In low margin markets such as the production of release paper, decreases in cost are critical to industry survival.

Study of Electrochemical Deposition of Copper and Microstructure Evolution in Fine Lines

1999 ◽  
Vol 562 ◽  
Author(s):  
Stephan Grunow ◽  
Deda Diatezua ◽  
Soon-Cheon Seo ◽  
Timothy Stoner ◽  
Alain E. KaloyerosI
Keyword(s):  
Electrochemical Deposition ◽  
Microstructure Evolution ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Process Window ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Underlying Mechanisms ◽  
Pure Cu

ABSTRACTAs computer chip technologies evolve from aluminum-based metallization schemes to their copper-based counterparts, Electrochemical Deposition (ECD) is emerging as a viable deposition technique for copper (Cu) interconnects. This paper presents the results of a first-pass study to examine the underlying mechanisms that control ECD Cu nucleation, growth kinetics, and post-deposition microstructure evolution (self-annealing), leading to the development and optimization of an ECD Cu process recipe for sub-quarter-micron device generations. The influence of bath composition, current waveform, type and texture of Cu seed layer, and device feature size (scaling effect) on the evolution of film texture, morphology, electrical properties, and fill characteristics was investigated using a manufacturing-worthy ReynoldsTech 8″ wafer plating tool. Resulting films were analyzed by X-ray Diffraction (XRD), four-point resistivity probe, Focused-Ion-Beam Scanning Electron Microscopy (FIB-SEM), and Atomic Force Microscopy (AFM). These investigations identified an optimized process window for the complete fill of aggressive device structures with pure Cu with resistivity ∼ 2.0 μΩ-cm and smooth surface morphology.

scholarly journals Indirect magnetic force microscopy

2019 ◽  
Vol 1 (6) ◽  
pp. 2348-2355 ◽  
Author(s):  
Joshua Sifford ◽  
Kevin J. Walsh ◽  
Sheng Tong ◽  
Gang Bao ◽  
Gunjan Agarwal
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Label Free ◽  
Force Microscopy ◽  
Novel Approach

Indirect magnetic force microscopy (ID-MFM): a novel approach to detect magnetic nanoparticles in a multimodal, label-free manner.

scholarly journals Atomic force microscopy recognition of protein A onStaphylococcus aureuscell surfaces by labelling with IgG–Au conjugates

2013 ◽  
Vol 4 ◽  
pp. 743-749 ◽  
Author(s):  
Elena B Tatlybaeva ◽  
Hike N Nikiyan ◽  
Alexey S Vasilchenko ◽  
Dmitri G Deryabin
Keyword(s):  
Atomic Force Microscopy ◽  
Protein A ◽  
Bacterial Cells ◽  
Force Microscopy ◽  
Selective Labelling ◽  
Atomic Force ◽  
Novel Approach ◽  
Preferential Binding ◽  
Igg Receptors ◽  
Labelling Method

The labelling of functional molecules on the surface of bacterial cells is one way to recognize the bacteria. In this work, we have developed a method for the selective labelling of protein A on the cell surfaces ofStaphylococcus aureusby using nanosized immunogold conjugates as cell-surface markers for atomic force microscopy (AFM). The use of 30-nm size Au nanoparticles conjugated with immunoglobulin G (IgG) allowed the visualization, localization and distribution of protein A–IgG complexes on the surface ofS. aureus. The selectivity of the labelling method was confirmed in mixtures ofS. aureuswithBacillus licheniformiscells, which differed by size and shape and had no IgG receptors on the surface. A preferential binding of the IgG–Au conjugates toS. aureuswas obtained. Thus, this novel approach allows the identification of protein A and other IgG receptor-bearing bacteria, which is useful for AFM indication of pathogenic microorganisms in poly-component associations.

Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

2016 ◽  
Vol 18 (5) ◽  
pp. 3522-3529 ◽  
Author(s):  
Ignacio Lopez-Quintas ◽  
Vincent Loriot ◽  
David Ávila ◽  
Jesus G. Izquierdo ◽  
Esther Rebollar ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Ultrafast Laser ◽  
Double Pulse ◽  
Femtosecond Laser Irradiation ◽  
Pulse Irradiation ◽  
Highly Sensitive ◽  
Ultrafast Laser Pulse

The ablation dynamics of Co/ZnS is highly sensitive to the details of an ultrafast laser pulse irradiation sequence.

On the effect of process parameters on properties of AlSi10Mg parts produced by DMLS

2014 ◽  
Vol 20 (6) ◽  
pp. 449-458 ◽  
Author(s):  
Manickavasagam Krishnan ◽  
Eleonora Atzeni ◽  
Riccardo Canali ◽  
Flaviana Calignano ◽  
Diego Manfredi ◽  
...  
Keyword(s):  
Process Parameters ◽  
Deep Understanding ◽  
Close Correlation ◽  
Process Window ◽  
Optimum Process ◽  
Sintering Process ◽  
Content Type ◽  
Significant Process ◽  
Macroscopic Properties ◽  
Full Factorial

Purpose – The aim of this research is to reach a deep understanding on the effect of the process parameters of Direct Metal Laser Sintering process (DMLS) on macroscopic properties (hardness and density) of AlSi10Mg parts and resulting microstructure. Design/methodology/approach – A full factorial design of experiment (DOE) was applied to determine the most significant process parameter influencing macroscopic properties of AlSi10Mg parts manufactured by DMLS process. The analysis aims to define the optimum process parameters and deduce the process window that provides better macroscopic properties of AlSi10Mg parts. Optical microscopy observations are carried out to link the microstructure to macroscopic properties. Findings – Macroscopic properties of DMLS parts are influenced by the change in process parameters. There is a close correlation between the geometry of scan tracks and macroscopic properties of AlSi10Mg parts manufactured by DMLS process. Originality/value – The knowledge of utilizing optimized process parameters is important to fabricate DMLS parts with better mechanical properties. The present research based on applying experimental design is the first analysis for AlSi10Mg parts produced in DMLS process.

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