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With direct laser writing, we show that laser scan rate can control the elemental ratio of two metals in the deposited structure. This occurs when one deposition process is triggered by photoexcitation while the other is a secondary dependent reaction. Energy Dispersive Spectroscopy (EDS) is used to find the atomic ratio of the metals. The ratio of copper to silver can be tuned from over 90:1 to below 1:1 and the trend follows an inverse relationship with scan speed.
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Adams et al. (2024) studied this question.
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