Self assembled nanoparticle aggregates from line focused femtosecond laser ablation

Zuhlke, Craig; Alexander, Dennis R.; Bruce, J.C.; Ianno, N. J.; Kamler, C. A.; Yang, Weiqing

doi:10.1364/oe.18.004329

Cited by 25 publications

(10 citation statements)

References 6 publications

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“…The surface topography created with single-pulse FLSP consisted of a surface covered with what appears to be aggregated nanoparticles similar to structures reported in the past on aluminum, silicon and silicon carbide (Zuhlke et al 2010;Tsubaki et al 2017). The nanoscale roughness of the surface in Fig.…”

Section: Single-pulse/overlapped-pulse Flsp Studiessupporting

confidence: 66%

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Roth

Zuhlke

Peng

et al. 2018

Multiscale and Multidiscip. Model. Exp. and Des.

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Self-organized mound-like micro/nanoscale structures are reported for the first time on silver using a dual-pulse femtosecond laser surface processing technique. The dual-pulse laser processing technique reported in this paper uses femtosecond laser pulse pairs with a controlled temporal delay between the leading and trailing pulses. Using dual pulses at higher fluence values, mound-like micro/nanostructures have been created on silver samples for the first time. Formation of the self-organized microstructures is shown to be dependent on the time delay between the leading and trailing pulses. Mound-like microstructures do not develop on silver for overlapped pulses or using single-pulse femtosecond laser surface processing for the parameter space studied. Subsurface microstructure characterization of a single mound-like surface structure is analyzed by crosssectional analysis using focused ion beam milling followed by scanning electron microscopy and energy dispersive X-ray spectroscopy.

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Section: Single-pulse/overlapped-pulse Flsp Studiessupporting

confidence: 66%

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Roth

Zuhlke

Peng

et al. 2018

Multiscale and Multidiscip. Model. Exp. and Des.

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“…Pulses from a femtosecond laser are focused by a lens onto a sample mounted on a computer‐controlled XY‐translation stage. One can also use a cylindrical lens to focus the laser beam into a focused line . A beamsplitter and joulemeter are used for monitoring the femtosecond laser pulse energy.…”

Section: Surface Micro/nanostructuring By Direct Femtosecond Laser Prmentioning

confidence: 99%

“…Furthermore, this blackening technique was found to be suitable for producing highly‐absorptive metals over an ultrabroad electromagnetic spectrum, ranging from the ultraviolet to terahertz . Enhanced absorption of metals can also be produced using other femtosecond laser‐induced structures such as nanostructure‐textured conical columnar structures , arrays of nanoholes induced by the four‐beam interferometric femtosecond laser ablation technique , coral‐like microstructures , and aggregates of nanoparticles .…”

Section: Applications Of Femtosecond Laser‐induced Surface Structuresmentioning

confidence: 99%

Direct femtosecond laser surface nano/microstructuring and its applications

Vorobyev

Chen

2012

Laser & Photonics Reviews

965

584

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This paper reviews a new field of direct femtosecond laser surface nano/microstructuring and its applications. Over the past few years, direct femtosecond laser surface processing has distinguished itself from other conventional laser ablation methods and become one of the best ways to create surface structures at nano‐ and micro‐scales on metals and semiconductors due to its flexibility, simplicity, and controllability in creating various types of nano/microstructures that are suitable for a wide range of applications. Significant advancements were made recently in applying this technique to altering optical properties of metals and semiconductors. As a result, highly absorptive metals and semiconductors were created, dubbed as the “black metals” and “black silicon”. Furthermore, various colors other than black have been created through structural coloring on metals. Direct femtosecond laser processing is also capable of producing novel materials with wetting properties ranging from superhydrophilic to superhydrophobic. In the extreme case, superwicking materials were created that can make liquids run vertically uphill against the gravity over an extended surface area. Though impressive scientific achievements have been made so far, direct femtosecond laser processing is still a young research field and many exciting findings are expected to emerge on its horizon.

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“…39 When applying FLSP on a metal surface, different combinations of laser fluence and laser pulses per unit area result in many distinct types of self-organized micro/nanostructures. 5,8,[40][41][42] Zuhlke et al described seven unique categories of micro/nanoscale structures that formed when applying FLSP onto Ni 200/201 in the fluence range of ablation threshold to 3 J cm À2 and cumulative pulse counts from 1 to 20 000 pulses. A map of these fluence and pulse count combinations is presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

Growth mechanisms of multiscale, mound-like surface structures on titanium by femtosecond laser processing

Peng

Bell

Zuhlke

et al. 2017

Journal of Applied Physics

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Femtosecond laser surface processing (FLSP) can be used to functionalize many surfaces, imparting specialized properties such as increased broadband optical absorption or superhydrophobicity/-hydrophilicity. In this study, the subsurface microstructure of a series of mound-like FLSP structures formed on commercially pure titanium using five combinations of laser fluence and cumulative pulse counts was studied. Using a dual beam Scanning Electron Microscope with a Focused Ion Beam, the subsurface microstructure for each FLSP structure type was revealed by cross-sectioning. The microstructure of the mounds formed using the lowest fluence value consists of the original Ti grains. This is evidence that preferential laser ablation is the primary formation mechanism. However, the underlying microstructure of mounds produced using higher fluence values was composed of a distinct smaller-grained a-Ti region adjacent to the original larger Ti grains remaining deeper beneath the surface. This layer was attributed to resolidification of molten Ti from the hydrodynamic Marangoni effect driven fluid flow of molten Ti, which is the result of the femtosecond pulse interaction with the material.

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Self assembled nanoparticle aggregates from line focused femtosecond laser ablation

Cited by 25 publications

References 6 publications

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Direct femtosecond laser surface nano/microstructuring and its applications

Growth mechanisms of multiscale, mound-like surface structures on titanium by femtosecond laser processing

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