Laser processing of metal thin films using transparent microsphere arrays

Constantinescu, Cătălin; Kallepalli, L. N. Deepak; Delaporte, Philippe; Utéza, O.; Grojo, David

doi:10.1016/j.apsusc.2014.10.003

Cited by 13 publications

(8 citation statements)

References 38 publications

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“…Porous membranes are potentially directly relevant for medical and bio-applications, but they also serve as deposition masks for the preparation of more complex nanomaterials, such as nanodot or rod arrays, after dissolution of the membrane [ 123 , 124 ]. More generally, the advantage is the inherent high resolution provided by the focusing power of the microspheres that can be used in almost all laser processing approaches, including laser de-wetting [ 125 ], machining [ 126 , 127 ], annealing and printing by the so-called laser-induced forward transfer [ 125 , 128 ], a technology detailed in Section 4 . Combined with lithographic and other standard material preparation techniques, this leads to very cost-effective and flexible methods for the synthesis of various periodically architectured materials, as illustrated with Figure 7 .…”

Section: Direct and Microsphere-assisted Laser Methods For Materiamentioning

confidence: 99%

“…Several approaches have been envisaged, including microsphere-assisted laser processing, that allow the parallel ablation and printing of metal, leading to the formation of negative patterning (nano-pinholes) and positive patterning (nanodroplets) [ 127 ]. Therefore, by taking the benefit of microsphere photonic nano-jet formation, the LIFT at the nanometer scale was demonstrated for silver, and these results have been on the cover of the journal “Applied Surface Science”, volume 336 (May 2015) [ 127 ]. However, the narrow-size-distribution nanodroplets are randomly spread on the receiving surface, as observed by atomic force microscopy, revealing some of the challenges associated to downscaling to the nm-level of this laser printing technique.…”

Section: Laser-induced Forward Transfer (Lift)mentioning

confidence: 99%

“…An additional approach towards sub-micron and nanometer level resolution is to use colloidal lithography combined with laser processing, to obtain the surface micro-/nano-structuring with plasmon active metals [ 125 , 126 , 127 ]. Controlled laser-induced and/or thermal annealing de-wetting is a novel high-resolution yet cost-efficient technique in obtaining various structures/shapes of surface plasmon resonators ( Figure 13 ), with the desired resolution needed in probing the structural inter-relationships of the chemical bonds.…”

Section: Laser-induced Forward Transfer (Lift)mentioning

confidence: 99%

See 2 more Smart Citations

Short-Pulse Lasers: A Versatile Tool in Creating Novel Nano-/Micro-Structures and Compositional Analysis for Healthcare and Wellbeing Challenges

et al. 2021

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Driven by flexibility, precision, repeatability and eco-friendliness, laser-based technologies have attracted great interest to engineer or to analyze materials in various fields including energy, environment, biology and medicine. A major advantage of laser processing relies on the ability to directly structure matter at different scales and to prepare novel materials with unique physical and chemical properties. It is also a contact-free approach that makes it possible to work in inert or reactive liquid or gaseous environment. This leads today to a unique opportunity for designing, fabricating and even analyzing novel complex bio-systems. To illustrate this potential, in this paper, we gather our recent research on four types of laser-based methods relevant for nano-/micro-scale applications. First, we present and discuss pulsed laser ablation in liquid, exploited today for synthetizing ultraclean “bare” nanoparticles attractive for medicine and tissue engineering applications. Second, we discuss robust methods for rapid surface and bulk machining (subtractive manufacturing) at different scales by laser ablation. Among them, the microsphere-assisted laser surface engineering is detailed for its appropriateness to design structured substrates with hierarchically periodic patterns at nano-/micro-scale without chemical treatments. Third, we address the laser-induced forward transfer, a technology based on direct laser printing, to transfer and assemble a multitude of materials (additive structuring), including biological moiety without alteration of functionality. Finally, the fourth method is about chemical analysis: we present the potential of laser-induced breakdown spectroscopy, providing a unique tool for contact-free and space-resolved elemental analysis of organic materials. Overall, we present and discuss the prospect and complementarity of emerging reliable laser technologies, to address challenges in materials’ preparation relevant for the development of innovative multi-scale and multi-material platforms for bio-applications.

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Section: Direct and Microsphere-assisted Laser Methods For Materiamentioning

confidence: 99%

Section: Laser-induced Forward Transfer (Lift)mentioning

confidence: 99%

Section: Laser-induced Forward Transfer (Lift)mentioning

confidence: 99%

See 1 more Smart Citation

Short-Pulse Lasers: A Versatile Tool in Creating Novel Nano-/Micro-Structures and Compositional Analysis for Healthcare and Wellbeing Challenges

et al. 2021

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“…The microsphere-assisted laser machining method allowed parallel ablation and printing of the metal, generating the formation of negative patterns (nanopores) and positive patterns (nanodrops). The high density filled single layer transparent microspheres on the quartz substrate were covered with a thermally evaporated silver film of controlled thickness [88].…”

Section: Pattern or Arraysmentioning

confidence: 99%

The Fabrication of Micro/Nano Structures by Laser Machining

Yang

Wei

et al. 2019

Nanomaterials

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Micro/nano structures have unique optical, electrical, magnetic, and thermal properties. Studies on the preparation of micro/nano structures are of considerable research value and broad development prospects. Several micro/nano structure preparation techniques have already been developed, such as photolithography, electron beam lithography, focused ion beam techniques, nanoimprint techniques. However, the available geometries directly implemented by those means are limited to the 2D mode. Laser machining, a new technology for micro/nano structural preparation, has received great attention in recent years for its wide application to almost all types of materials through a scalable, one-step method, and its unique 3D processing capabilities, high manufacturing resolution and high designability. In addition, micro/nano structures prepared by laser machining have a wide range of applications in photonics, Surface plasma resonance, optoelectronics, biochemical sensing, micro/nanofluidics, photofluidics, biomedical, and associated fields. In this paper, updated achievements of laser-assisted fabrication of micro/nano structures are reviewed and summarized. It focuses on the researchers’ findings, and analyzes materials, morphology, possible applications and laser machining of micro/nano structures in detail. Seven kinds of materials are generalized, including metal, organics or polymers, semiconductors, glass, oxides, carbon materials, and piezoelectric materials. In the end, further prospects to the future of laser machining are proposed.

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“…Furthermore, by downscaling such laser printing techniques, nanometer-size objects can be printed, e.g. by using an array of transparent microspheres (microlenses) [20,21]. We have previously investigated the laser fabrication of various organic electronic devices by using polymers such as polyvinylphenol (PVP) and parylene-C (Py-C) [16,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%