Using a dynamic fabrication process, hybrid, photoactivated microswimmers made from two different semiconductors, titanium dioxide (TiO₂) and cuprous oxide (Cu₂O) are developed, where each material occupies a distinct portion of the multiconstituent particles. Structured light‐activated microswimmers made from only TiO₂ or Cu₂O are observed to be driven in hydrogen peroxide and water most vigorously under UV or blue light, respectively, whereas hybrid structures made from both of these materials exhibit wavelength‐dependent modes of motion due to the disparate responses of each photocatalyst. It is also found that the hybrid particles are activated in water alone, a behavior which is not observed in those made from a single semiconductor, and thus, the system may open up a new class of fuel‐free photoactive colloids that take advantage of semiconductor heterojunctions. The TiO₂/Cu₂O hybrid microswimmer presented here is but an example of a broader method for inducing different modes of motion in a single light‐activated particle, which is not limited to the specific geometries and materials presented in this study.

中文翻译：

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光激活，多半导体混合微游泳器

使用动态制造工艺，开发了由两种不同的半导体（二氧化钛（TiO ₂）和氧化亚铜（Cu ₂ O））制成的混合型光活化微泳剂，其中每种材料都占据了多组分颗粒的不同部分。仅由TiO ₂或Cu ₂制成的结构化光敏微泳器观察到O分别在紫外线或蓝光下最强烈地在过氧化氢和水中被驱动，而由这两种材料制成的杂化结构由于每种光催化剂的不同响应而呈现出与波长有关的运动模式。还发现杂化粒子仅在水中被激活，这种行为在单个半导体制得的粒子中没有观察到，因此，该系统可能会开辟利用半导体优势的新型无燃料光敏胶体异质结。TiO ₂ / Cu ₂此处介绍的混合微游泳器只是在单个光激活粒子中诱导不同运动模式的更广泛方法的一个示例，该方法不限于本研究中介绍的特定几何形状和材料。