Molding topologically-complex 3D polymer microstructures from femtosecond laser machined glass

The mechanical properties of nanofiber reinforced polymer microstructures were investigated in this work by means of nanoindentation. The femtosecond laser was used to generate nanofibers on selected area on the surface of the substrate and to generate microstructures. These microstructures were formed via two photon polymerization using femtosecond laser material processing by incorporation of silicon nanofibers into Ormocer matrix. Results show that the hardness and elastic modulus of the nanocomposites have improved by 25% and 75%, respectively, with the incorporation of nanofibers using the described method, which has the potential of direct fabrication of reinforced micro-/nanostructures. The volume fraction of the generated nanofibers in the nanocomposite was calculated by using nanoindentation analysis.

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Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020200258 ◽

2020 ◽

Vol 92 (2) ◽

pp. 20701

Author(s):

Bo Li ◽

Xiaofeng Li ◽

Zhifeng Zhu ◽

Qiang Gao

Keyword(s):

Femtosecond Laser ◽

Spatial Resolution ◽

Laser Induced Breakdown Spectroscopy ◽

Nanosecond Laser ◽

Breakdown Threshold ◽

Powerful Technique ◽

Breakdown Spectroscopy ◽

Continuous Radiation ◽

Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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Femtosecond laser assisted penetrating keratoplasty

Klinische Monatsblätter für Augenheilkunde ◽

10.1055/s-2006-946938 ◽

2006 ◽

Vol 223 (S 1) ◽

Author(s):

MP Holzer ◽

TM Rabsilber ◽

GU Auffarth

Keyword(s):

Femtosecond Laser ◽

Penetrating Keratoplasty

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Influence of Trap States on the Kinetics of Luminescence and Induced Light Absorption by Si Nanoparticles in a SiO2 Matrix at Their Excitation with Femtosecond Laser Pulses

Ukrainian Journal of Physics ◽

10.15407/ujpe58.01.0020 ◽

2013 ◽

Vol 58 (1) ◽

pp. 20-25

Author(s):

V.M. Kadan ◽

◽

I.Z. Indutnyi ◽

V.A. Dan’ko ◽

P.E. Shepelyavyi ◽

...

Keyword(s):

Femtosecond Laser ◽

Light Absorption ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Trap States ◽

Sio2 Matrix ◽

Si Nanoparticles ◽

Kinetics Of

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Effect of Periodic Nanostructures Produced with Femtosecond Laser for Wavelength of 388 and 775 nm on Cell Spreading

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.135.587 ◽

2015 ◽

Vol 135 (10) ◽

pp. 587-591

Author(s):

Togo Shinonaga ◽

Masahiro Tsukamoto ◽

Peng Chen ◽

Takao Hanawa

Keyword(s):

Femtosecond Laser ◽

Cell Spreading ◽

Periodic Nanostructures

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Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

MRS Proceedings ◽

10.1557/proc-780-y4.12 ◽

2003 ◽

Vol 780 ◽

Cited By ~ 1

Author(s):

R. Houbertz ◽

J. Schulz ◽

L. Fröhlich ◽

G. Domann ◽

M. Popall ◽

...

Keyword(s):

Femtosecond Laser ◽

Sol Gel ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Hybrid Polymer ◽

Organic Hybrid ◽

Two Photon ◽

Applied Technology ◽

Scale Structures ◽

Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

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