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Schematics illustrating the working mechanism of a tiny ultrafast reactor at the glassliquid interface. Reactions are initiated in the hot zone near the beam waist (ω0), which is twice the Rayleigh length (zR), the distance along the beams propagation direction from the waist to the position where the cross-section area is doubled. The zeolitic crystals are produced in this tiny reactor and distributed to the full liquid volume via laser-induced convective flows, which emerge due to extreme thermal gradients and surface tensions (γ)

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