Liquid marbles are microlitre droplets of liquid, encapsulated by self-organised hydrophobic particles at the liquid/air interface. They offer an efficient approach for manipulating liquid droplets and compartmentalising reactions in droplets. Digital fluidic devices employing liquid marbles might benefit from having embedded computing circuits without electronics and moving mechanical parts (apart from the marbles). We present an experimental implementation of a collision gate with liquid marbles. Mechanics of the gate follows principles of Margolus' soft-sphere collision gate. Boolean values of the inputs are given by the absence (FALSE) or presence (TRUE) of a liquid marble. There are three outputs: two outputs are trajectories of undisturbed marbles (they only report TRUE when just one marble is present at one of the inputs), one output is represented by trajectories of colliding marbles (when two marbles collide they lose their horizontal momentum and fall), this output reports TRUE only when two marbles are present at inputs. Thus the gate implements AND and AND-NOT logical functions. We speculate that by merging trajectories representing AND-NOT output into a single channel one can produce a one-bit half-adder. Potential design of a one-bit full-adder is discussed, and the synthesis of both a pure nickel metal and hybrid nickel/polymer liquid marble is reported.

中文翻译：

---

用于基于碰撞的计算的液体大理石交互门

液体弹珠是微升的液滴，由液体/空气界面处的自组织疏水颗粒包裹。它们提供了一种有效的方法来操纵液滴和区分液滴中的反应。采用液体弹珠的数字流体设备可能会受益于嵌入式计算电路，而无需电子设备和移动机械部件（弹珠除外）。我们提出了一个带有液体弹珠的碰撞门的实验实现。门的力学遵循 Margolus 的软球碰撞门的原理。输入的布尔值由液体弹珠的缺失 (FALSE) 或存在 (TRUE) 给出。有三个输出：两个输出是未受干扰弹珠的轨迹（当输入之一中只有一个弹珠时，它们仅报告 TRUE），一个输出由碰撞弹珠的轨迹表示（当两个弹珠碰撞时，它们会失去水平动量并下落），只有当输入处存在两个弹珠时，此输出才会报告 TRUE。因此，门实现了 AND 和 AND-NOT 逻辑功能。我们推测，通过将表示 AND-NOT 输出的轨迹合并到单个通道中，可以产生一位半加器。讨论了一位全加器的潜在设计，并报告了纯镍金属和混合镍/聚合物液体大理石的合成。我们推测，通过将表示 AND-NOT 输出的轨迹合并到单个通道中，可以产生一位半加器。讨论了一位全加器的潜在设计，并报告了纯镍金属和混合镍/聚合物液体大理石的合成。我们推测，通过将表示 AND-NOT 输出的轨迹合并到单个通道中，可以产生一位半加器。讨论了一位全加器的潜在设计，并报告了纯镍金属和混合镍/聚合物液体大理石的合成。