Dynamic response of thin films on substrates subjected to femtosecond laser pulses

Jorgensen, David J.; Pollock, Tresa M.; Begley, Matthew R.

doi:10.1016/j.actamat.2014.08.048

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…In this work, we used a femto-second pulse laser (FS laser), which is capable of 3D processing without thermal effects and shape limitations [14][15][16]. In FS laser processing, the pulse width of the laser is shorter than the heat propagation time of the material, thus preventing thermal damage and structural changes in the material.…”

Section: Low-cost Mass Fabricating Rgmpsmentioning

confidence: 99%

Quantifying and dispensing of magnetic particles in a self-assembled magnetic particle array

Song

Yoon

Jeong³

et al. 2021

Journal of Magnetism and Magnetic Materials

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Section: Low-cost Mass Fabricating Rgmpsmentioning

confidence: 99%

Quantifying and dispensing of magnetic particles in a self-assembled magnetic particle array

Song

Yoon

Jeong³

et al. 2021

Journal of Magnetism and Magnetic Materials

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“…As shown in Figure 1, the sequential techniques consist of three processes. The first is casting and packaging of microwire, [12,13] the second is an ultrashort laser cutting process, [14][15][16] and the third involves surface chemistry. [17,18] Low-cost, large-scale, and continuous product processes for GMGPs are suitable for the industrialization stage of functional magnetic particles, such as general binding matrix for immunoassays.…”

Section: Doi: 101002/adem202000060mentioning

confidence: 99%

New Precision Engineering Methods for Low‐Cost Mass Production of Functional Giant Magnetic Glass‐Coated Particles as Immune Biomarkers

Song

Lim

Choi³

et al. 2020

Adv Eng Mater

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Advances in diverse diagnostic areas such as in vitro and molecular diagnoses have been stimulated by novel functional particles. In the industrialization stage of the diagnostic technology market, it is important to manufacture functional particles through low‐cost and large‐scale methods. Conventional methods in manufacturing magnetic particles typically involve modifying the surface of nano‐sized metal pieces with silica. These pieces are often suspended in a liquid state and difficult to separate, resulting in practical limitations during bioassay tests. A key factor in the manufacture of uniform magnetic particles is the mass production process. Herein, a new precision engineering method that focuses on rapid and cost‐effective mass production of uniform magnetic particles is presented, combining the cutting of magnetic microwires with electro‐opto‐micromachining techniques. The resulting giant magnetic glass‐coated particles have a high degree of uniformity and strong magnetic properties. They can be easily manipulated without the aid of a surfactant, and no particles are lost during bioassays. As biosensors, they offer high sensitivity and can be used in multiplexed immunoassays.

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“…Femtosecond laser ablation is useful for many applications such as the creation of nanoparticles [1], thin film deposition [2], micromachining [3][4][5], 3D tomography [6], microfluidics [4,7], and 1 davidjjorgensen@engr.ucsb.edu, fax:(805) 893-8486 measuring the properties of thin films on substrates [8]. Paramount to all of these techniques is a detailed understanding of the fluence-ablation relationship of the materials systems.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser ablation and nanoparticle formation in intermetallic NiAl

Jorgensen

Titus

Pollock

2015

Applied Surface Science

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The ablation behavior of a stoichiometric intermetallic compound-NiAl subjected to femtosecond laser pulsing in air has been investigated. The single-pulse ablation threshold for NiAl was determined to be 83 ± 4 mJ/cm 2 and the transition to the high-fluence ablation regime occurred at 2.8 ± 0.3 J/cm 2. Two sizes of nanoparticles consisting of Al, NiAl, Ni 3 Al and NiO were formed and ejected from the target during high-fluence ablation. Chemical analysis revealed that smaller nanoparticles (1-30 nm) tended to be rich in Al while larger nanoparticles (>100 nm) were lean in Al. Ablation in the low-fluence regime maintained this trend. Redeposited material and nanoparticles remaining on the surface after a single 3.7 J/cm 2 pulse, one hundred 1.7 J/cm 2 pulses, or one thousand 250 mJ/cm 2 pulses were enriched in Al relative to the bulk target composition. Further, the surface of the irradiated high-fluence region was depleted in Al indicating that the fs laser ablation removal rate of the intermetallic constituents in this regime does not scale with the individual pure element ablation thresholds.

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Dynamic response of thin films on substrates subjected to femtosecond laser pulses

Cited by 7 publications

References 39 publications

Quantifying and dispensing of magnetic particles in a self-assembled magnetic particle array

Quantifying and dispensing of magnetic particles in a self-assembled magnetic particle array

New Precision Engineering Methods for Low‐Cost Mass Production of Functional Giant Magnetic Glass‐Coated Particles as Immune Biomarkers

Femtosecond laser ablation and nanoparticle formation in intermetallic NiAl

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