Refractive X-Ray Lenses Made by the Two-Photon Laser Lithography Method

Patolyatov, A. D.; Shcherbakov, D. A.; Колымагин, Д. А.; Matital, Rilond Pattia; Чубич, Д. А.; Vitukhovsky, A. G.

doi:10.3103/s1541308x22050089

Cited by 1 publication

(1 citation statement)

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“…An increased resolution was possible due to the twophoton polymerization technique, and this promoted a heavy growth of the DLW technology and implementations thereof [1,2]. Laser-printed structures have many applications, from refractive focusing elements for X-ray microscopy [3][4][5][6] to scaffolds for studying separated immobilized cells [7][8][9]. Nobody stands against obvious demands of durability of the X-ray focusing accessories in the X-ray radiation field, but the same requirements become applicable to the scaffolds: at present, many biological studies involving scaffolds employ synchrotron radiation (SR) X-ray sources [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Do the Laser-Printed 3D-Structures Withstand the X-ray Synchrotron Radiation Beam?

Danilkin,

Vitukhnovsky,

Kolymagin

et al. 2023

Preprint

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The radiation stability of polymer test objects fabricated by direct laser writing is studied. The two groups of 6 cubes (50×50×50 μm3) were printed on a common silicon substrate. 6 cubes were irradiated with X-rays in the synchrotron radiation beam (12 keV, 1010 photons/mm2/s), the other 6 kept non-irradiated for the reference. In each group, the fabrication parameters (laser power and slicing step) were uniformly varied from cube to cube. Each irradiated cube was exposed with the dose of 1013 X-ray photons. The calibration of this dose in the radiological units (Gy) was carried out using the tissue-equivalent thermoluminescent detectors (TLD-800). The corresponding exposition dose was estimated as 30 kGy for each cube. The radiation effects were evaluated by Raman spectroscopy and by morphological changes observed with the raster electron microscope. The primary radiation effect appears in the essential increase of the polymerization degree with consuming carbon-carbon double bonds in favor of the polymer cross-linking. Only one cube of 6 has changed the size and shape due to this effect, while the others retained the initial shape. Morphological changes are connected with the improper fabrication parameters (laser power and slicing step). Properly fabricated objects withstand the X-rays of the synchrotron radiation beam.

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