Figure - available via license: Creative Commons Attribution 4.0 International
Content may be subject to copyright.
Source publication
In this paper, a quick nanosecond laser micro structuring process was employed to change the surface wettability of Ti6Al4V alloy. The same laser structuring method was used throughout, but with varying input fluence. The laser processing parameters resulted in high surface melting. After laser treatment, four post-processing methods were used, nam...
Context in source publication
Similar publications
The wettability of the paper surface is greatly affected by the wettability of the pulp fibers. We conducted this study in order to understand the relationship between the wettability of a single fiber of recycled pulp and the strength of recycled paper, as well as the inter-fiber bonding strength. The contact angle was determined from a series of...
A facile method for the immobilization of β-cyclodextrin on polysulfone membranes with the aim of selectively adsorbing low-density lipoprotein (LDL) was established, which is based on the self-assembly of dopamine on the membrane followed by the Schiff base reaction with mono-(6-ethanediamine-6-deoxy)-β-cyclodextrin. The surface modification proce...
Understanding wettability of clay minerals is crucial in assessing primary migration of hydrocarbon and evaluating CO2 storage capacities and containment security. In spite of recent efforts, there is considerable uncertainty of experimental data and theoretical predictions are lacking. We, therefore, developed new correlations to predict the advan...
In order to prepare stainless steel filter with controllable wettability and oil-water separation property, a layer of zinc oxide was grown on the surface of stainless steel by hydrothermal method to construct micro-nano roughness. Then, a stainless steel filter with controllable wettability was successfully prepared by modification of fatty acids...
A char of Tagetes erecta flowers (TFC) was derived through simple thermal decomposition of Tagetes erecta flowers (TF). Physico-chemical properties of as-prepared TFC were evaluated using XRD, FESEM, FTIR, TGA, N2 adsorption-desorption isotherm analysis and water contact angle measurements. The practicality and applicability of TFC as promising el...
Citations
... super hydrophilic/super hydrophobic effects, self-cleaning and anti-icing properties on laser-irradiated metals [6][7][8]. Surface structuring has tremendous technological applications, such as in the field of industry [9], biomedical [10] and optical sciences by growing various coatings and micro/nanostructures that are efficient for light detection, reflection, data storage, field emission and desired tribological properties of surfaces [11,12]. Laser-induced structuring can also cause the enhancement in surface roughness and increased adhesion of irradiated target surface [13]. ...
... The induced stresses σ are defined as σ = ɛE (9) where E is the Young modulus, equal to 69 GPa for Al [57]. After irradiation with laser variation in intensity of peak is correlated to the variations in size of crystallites, residual strain and residual stress on target surface. ...
Micro/nano structuring of KrF Excimer laser-irradiated Aluminum (Al) has been correlated with laser-produced structural and mechanical changes. The effect of non-reactive Argon (Ar) and reactive Oxygen (O2) environments on the surface, structural and mechanical characteristics of nano-second pulsed laser-ablated Aluminum (Al) has been revealed. KrF Excimer laser with pulse duration 20 ns, central wavelength of 248 nm and repetition rate of was utilized for this purpose. Exposure of targets has been carried out for 0.86, 1, 1.13 and 1.27 J.cm−2 laser fluences in non-reactive (Ar) and reactive (O2) ambient environments at a pressure of 100 torr. A variety of characteristics of the irradiated targets like the morphology of the surface, chemical composition, crystallinity and nano hardness were investigated by using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffractometer (XRD), Raman spectroscopy and Nanohardness tester techniques, respectively. The nature (reactive or non-reactive) and pressure of gas played an important role in modification of materials. In this study, a strong correlation is observed between the surface structuring, chemical composition, residual stress variation and the variation in hardness of Al surface after ablation in both ambient (Ar, O2). In the case of reactive environment (O2), the interplay among the deposition of laser energy and species of plasma of ambient gas enhances chemical reactivity, which causes the formation of oxides of aluminum (AlO, Al2O3) with high mechanical strength. That makes it useful in the field of process and aerospace industry as well as in surface engineering.
This article explores the enhancement of material surface properties of Ti6Al4V, potentially applicable to dental implants, through ultra-short pulse laser systems. This study investigates potential connections between surface wettability and biocompatibility, addressing the challenge of improving variability in material properties with specific laser treatment. Several designed microstructures were manufactured using a picosecond laser system. After that, the wettability of these structures was measured using the sessile drop method. The basic behavior and growth activity of biological cells (MG-63 cell line) on treated surfaces were also analyzed. While the conducted tests did not conclusively establish correlations between wettability and biocompatibility, the results indicated that laser treatment of Ti6Al4V could effectively enlarge the active surface to better biological cell colonization and adhesion and provide a focused moving orientation. This outcome suggests the potential application of laser treatment in producing special dental implants to mitigate the issues during and following implantation.
Bacterial biofilms pose serious problems in medical and industrial settings. One of the major societal challenges lies in the increasing resistance of bacteria against biocides used in antimicrobial treatments, e.g., via overabundant use in medicine, industry, and agriculture or cleaning and disinfection in private households. Hence, new efficient bacteria‐repellent strategies avoiding the use of biocides are strongly desired. One promising route to achieve bacteria‐repellent surfaces lies in the contactless and aseptic large‐area laser‐processing of technical surfaces. Tailored surface textures, enabled by different laser‐processing strategies that result in topographic scales ranging from nanometers to micrometers may provide a solution to this challenge. This article presents a current state‐of‐the‐art review of laser‐surface subtractive texturing approaches for controlling the biofilm formation for different bacterial strains and in different environments. Based on specific properties of bacteria and laser‐processed surfaces, the challenges of anti‐microbial surface designs are discussed, and future directions will be outlined.
The global rise of dental and orthopedic implant treatments in the twenty-first-century appeals to researchers for further investigations. The situation is worsening as the rate of failure and revision treatments are considerable. Inadequate osseointegration and infections are the significant causes of the problem. To address the issue laser surface texturing is proficient to modulate surface topography, morphology, wettability, and chemical characteristics. To date, the implant surface features are not configured to receive an optimal response for early bone healing through cell adhesion and proliferation. Experimental design to investigate optimal responses of Ti6Al4V surface by texturing it with nanosecond Nd: YAG 1064 nm laser is carried out. The evolved research surface methodology model resulted in an efficient parametric relationship with 98.5%, 98.87%, and 96.99% R2 values for ‘kerf width’, ‘Rz’, and ‘kerf width to Rz’ ANOVA analysis respectively. The ANN approach shows more accuracy than the RSM approach for the prediction of ‘kerf width’, ‘Rz’, and ‘kerf width to Rz’. The experiment was performed to attain control in the range of water contact angle 40° to 119° as hydrophilic (ϴ ≤ 90) nature is prominently favorable for cell adhesion and proliferation. The Lower ‘kerf width to Rz ratio’ and higher Rz inclined towards hydrophobicity. An increment in carbon content also assists in rising contact angle. LST improves the Ti oxide layer which is considered a more corrosion-resistive and biocompatible layer. This study will certainly help to develop improved stability and life of dental and orthopedic implant surfaces.
