A low-voltage droplet microgripper for micro-object manipulation

Vasudev, Abhay; Jagtiani, Ashish V.; Du, Lin; Zhe, Jiang

doi:10.1088/0960-1317/19/7/075005

Cited by 36 publications

(21 citation statements)

References 23 publications

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“…Capillary adhesion has been used specifically for manipulation of micro‐objects . Grippers using this adhesion technology exploit capillary lifting force of a liquid (generally water) bridging the gripper and the object.…”

Section: Gripping By Controlled Adhesionmentioning

confidence: 99%

Soft Robotic Grippers

et al. 2018

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Advances in soft robotics, materials science, and stretchable electronics have enabled rapid progress in soft grippers. Here, a critical overview of soft robotic grippers is presented, covering different material sets, physical principles, and device architectures. Soft gripping can be categorized into three technologies, enabling grasping by: a) actuation, b) controlled stiffness, and c) controlled adhesion. A comprehensive review of each type is presented. Compared to rigid grippers, end-effectors fabricated from flexible and soft components can often grasp or manipulate a larger variety of objects. Such grippers are an example of morphological computation, where control complexity is greatly reduced by material softness and mechanical compliance. Advanced materials and soft components, in particular silicone elastomers, shape memory materials, and active polymers and gels, are increasingly investigated for the design of lighter, simpler, and more universal grippers, using the inherent functionality of the materials. Embedding stretchable distributed sensors in or on soft grippers greatly enhances the ways in which the grippers interact with objects. Challenges for soft grippers include miniaturization, robustness, speed, integration of sensing, and control. Improved materials, processing methods, and sensing play an important role in future research.

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Section: Gripping By Controlled Adhesionmentioning

confidence: 99%

Soft Robotic Grippers

et al. 2018

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“…• Optical tweezers (e.g. laser grippers) generate forces, which are too small [39]. • Adequate electrostatic forces require high voltages.…”

Section: Overview Of Microclamping Principlesmentioning

confidence: 99%

Microclamping principles from the perspective of micrometrology – A review

Jantzen

Stein

Kniel

et al. 2017

Precision Engineering

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This paper gives an overview of the field of clamping and gripping principles from the viewpoint of sample fixturing for dimensional metrology for microobjects. The requirements for clamping microcomponents that allow dimensional measurements are therefore explained before principles and solutions of microclamps as found in literature are reviewed and evaluated on basis of these requirements. Results show that there is no single superior clamping principle or method of implementation but rather several effective solutions for specific applications. The core value of this paper is the link between requirements for sample fixturing in dimensional micrometrology and the many approaches already investigated in the field of microclamping. A radar chart and a decision tree summarize and visualize the major aspects of this review. Finally, directions of future key research areas are suggested.

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“…As much attention focuses on the improvement of the hydrophobic surface, different materials with super-hydrophobic features have been utilized to replace traditional hydrophobic materials [27][28][29][30]. For the purpose of droplet operations, the super-hydrophobic surface should satisfy the Cassie state, wherein the damp force and hysteresis effect are reduced dramatically.…”

Section: Super-hydrophobic Surfacementioning

confidence: 99%

Dynamics of Electrowetting Droplet Motion in Digital Microfluidics Systems: From Dynamic Saturation to Device Physics

et al. 2015

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A quantitative description of the dynamics of droplet motion has been a long-standing concern in electrowetting research. Although many static and dynamic models focusing on droplet motion induced by electrowetting-on-dielectric (EWOD) already exist, some dynamic features do not fit these models well, especially the dynamic saturation phenomenon. In this paper, a dynamic saturation model of droplet motion on the single-plate EWOD device is presented. The phenomenon that droplet velocity is limited by a dynamic saturation effect is precisely predicted. Based on this model, the relationship between droplet motion and device physics is extensively discussed. The static saturation phenomenon is treated with a double-layer capacitance electric model, and it is demonstrated as one critical factor determining the dynamics of droplet motion. This work presents the relationship between dynamics of electrowetting induced droplet motion and device physics including device structure, surface material and interface electronics, which helps to better understand electrowetting induced droplet motions and physics of digital microfluidics systems.

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A low-voltage droplet microgripper for micro-object manipulation

Cited by 36 publications

References 23 publications

Soft Robotic Grippers

Soft Robotic Grippers

Microclamping principles from the perspective of micrometrology – A review

Dynamics of Electrowetting Droplet Motion in Digital Microfluidics Systems: From Dynamic Saturation to Device Physics

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