Nanosecond laser textured superhydrophobic metallic surfaces and their chemical sensing applications

Ta, Van Duong; Dunn, Andrew K.; Wasley, Thomas J.; Kay, Robert W.; Stringer, Jonathan; Smith, Patrick J.; Connaughton, Colm; Shephard, Jonathan D.

doi:10.1016/j.apsusc.2015.09.027

Cited by 316 publications

(137 citation statements)

References 37 publications

Supporting

Mentioning

130

Contrasting

Order By: Relevance

“…Several mechanisms were proposed to explain this phenomenon. Chang et al proposed that the deoxidation of copper oxide could effectively promote the development from a hydrophilic to a super-hydrophobic surface [25,26]. Boinovich et al believed that metal oxides adsorbed organics in the air, resulting in the transition from a super-hydrophilic to super-hydrophobic surface [27,28].…”

mentioning

confidence: 99%

Hybrid Nanosecond Laser Processing and Heat Treatment for Rapid Preparation of Super-Hydrophobic Copper Surface

Wang

et al. 2019

Metals

View full text Add to dashboard Cite

The super-hydrophobic copper surface was obtained by using a nanosecond pulsed laser. Different micro-and nano-structures were fabricated by changing the laser scanning interval and scanning speed, before heating in an electric heater at 150 • C for two hours to explore the effect of laser parameters and heat treatment on the wettability of the copper surface. It was found that the laser-treated copper surface is super-hydrophilic, and then, after the heat treatment, the surface switches to hydrophobic or even super-hydrophobic. The best super-hydrophobic surface's apparent contact angle (APCA) was 155.6 • , and the water sliding angle (WSA) was 4 • . Super-hydrophobic copper is corrosion-resistant, self-cleaning, and dust-proof, and can be widely used in various mechanical devices.In order to find the best super-hydrophobic metal surface, we should know the reasons behind certain materials being super-hydrophobic.A dense column micro-or nano-structure is the key factor causing a super-hydrophobic surface. Thus, when we look for a super-hydrophobic surface, micro-and nano-scale dense column structures, such as the microstructures of lotus leaves, bird feathers, and butterfly wings, are considered. Although there are many ways to fabricate the hybrid micro/nano-structure on the material surface, such as chemical vapor deposition, chemical etching, nano-imprint lithography, electrode position, etc., there are various problems in their application [8][9][10][11][12][13][14][15][16][17]. For example, the size of the micro/nano-structure formed by the chemical etching method is very sensitive to external conditions such as temperature and concentration of chemical solution. In addition, etching reagents are mostly corrosive reagents with safety and environmental issues. Unlike the above methods, lasers can fabricate and precisely control the size of micro/nano-structures [18][19][20][21][22][23]. Therefore, laser processing can be used to quickly obtain micro/nano-structures. Recent studies found that the surfaces of metal oxides and nanostructures formed by laser ablation are initially hydrophilic or even super-hydrophilic; however, over time, they become hydrophobic, and sometimes even super-hydrophobic in air after two weeks to two months [24]. Several mechanisms were proposed to explain this phenomenon. Chang et al. proposed that the deoxidation of copper oxide could effectively promote the development from a hydrophilic to a super-hydrophobic surface [25,26]. Boinovich et al. believed that metal oxides adsorbed organics in the air, resulting in the transition from a super-hydrophilic to super-hydrophobic surface [27,28]. It can be seen that, although most researchers extensively studied this topic, there is obvious controversy regarding the mechanism of the wettability transition behavior.In this paper, a rapid method of fabricating a super-hydrophobic surface on a copper plate was studied. Micro/nano-structures were fabricated on copper surfaces by laser ablation, which then became super-hydrophobic after heat t...

show abstract

mentioning

confidence: 99%

Hybrid Nanosecond Laser Processing and Heat Treatment for Rapid Preparation of Super-Hydrophobic Copper Surface

Wang

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

“…For example, superhydrophobic surfaces were obtained by nanosecond laser texturing or ablation [31]. Via nanosecond laser ablation, micro/ nanostructures were patterned on silicon surface [32], resulting in decreased reflectivity, which has potential applications in solar cells.…”

Section: Introductionmentioning

confidence: 99%

Nanosecond pulsed laser irradiation induced hierarchical micro/nanostructures on Zr-based metallic glass substrate

et al. 2016

View full text Add to dashboard Cite

• Hierarchical micro/nanostructures were fabricated on a metallic glass substrate by nanosecond pulsed laser irradiation.• It retained amorphous characteristic and exhibited uniform element distribution.• Irradiation parameters induced change from cotton-like to particle-like nanostructure.• Formation mechanism and mechanical properties were investigated. A large effective surface area is beneficial to enhance the applications of metallic glasses (MGs) in heterogeneous catalysis and biomedical engineering. For the purpose of increasing effective surface area, in this study, hierarchical micro/nanostructures were fabricated on a Zr-based MG substrate by nanosecond pulsed laser irradiation. Experimental results indicated that a layer of micron-scale laser pulse tracks covered by a cotton-like MG thin film with nanometer-scale microstructure was formed in the laser irradiated region. This hierarchical micro/nanostructures retained amorphous characteristic and exhibited uniform element distribution. Its formation mechanism was investigated by analyzing the laser irradiation process and morphologies. Nanoindentation results indicated that the cotton-like MG thin film was very loose and soft compared to the as-cast MG substrate, showing different plastic deformation behavior. Results from this study indicate that nanosecond pulsed laser irradiation is an effective method to generate hierarchical micro/nanostructures on MG substrates, which can increase their effective surface areas and improve their potential applications as biomaterials and catalysts.

show abstract

“…Even if a Wenzel state was generated due to the cauliflower-like morphology of freshly sputtered nickel thin films, values reported for nickel surfaces [53,54] confirm that the laser treatment results in an actual increase in apparent contact angle in all cases. However, a change in surface energy as a consequence of laser treatment cannot be completely ruled out [18,22], an e↵ect that could change the hydrophobicity of the original smooth surface and give rise to a Wenzel state.…”

Section: Discussionmentioning

confidence: 99%

“…Micro-and nanopatterning can also be achieved with lasers, however their use as a procedure to induce direct hydrophobicity and superhydrophobicity in metallic surfaces is only emerging. Recent studies have used picosecond to nanosecond pulsed lasers with infrarred to ultraviolet wavelengths to successfully induce superhydrophobicity in platinum [17], brass [17][18][19], iron and stainless steels [20][21][22][23][24][25], titanium and Ti6Al4V [17,[20][21][22], silicon [26], copper [18,22], cobalt [22], aluminium [22,27] or carbon nanotubes [28]. No such surface patterning has been reported on nickel to date.…”

Section: Introductionmentioning

confidence: 99%

Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Carpeño

Dickinson

Seal

et al. 2016

Physica Status Solidi (a)

View full text Add to dashboard Cite

Abstractauthoren Nickel thin films were deposited on Ti6Al4V and surface treated with nanosecond pulse ultraviolet laser in ambient conditions using a fluence of 3.68 J cm−2. A twofold to threefold increase in contact angle was observed for water, ethylene glycol, and diiodomethane following laser treatment, with recorded contact angles for water in excess of 130°. No additional treatment was used to hydrophobize the surface. Three different micro‐ and nanometric levels of roughness were generated on the thin film surface, which can be related to the rastering parameters of the laser and to the increase in apparent contact angle. Melt droplets were identified as a main contribution to the nanometric roughness level, indicating that melting and melt ejection play an important role in surface nanostructuring. Micro‐ and nanopatterning obtained after UV laser treatment of nickel thin films, highlighting the different scales of the generated features.

show abstract

Nanosecond laser textured superhydrophobic metallic surfaces and their chemical sensing applications

Cited by 316 publications

References 37 publications

Hybrid Nanosecond Laser Processing and Heat Treatment for Rapid Preparation of Super-Hydrophobic Copper Surface

Hybrid Nanosecond Laser Processing and Heat Treatment for Rapid Preparation of Super-Hydrophobic Copper Surface

Nanosecond pulsed laser irradiation induced hierarchical micro/nanostructures on Zr-based metallic glass substrate

Induced hydrophobicity in micro‐ and nanostructured nickel thin films obtained by ultraviolet pulsed laser treatment

Contact Info

Product

Resources

About