ORCID Profile
0000-0002-8152-2892
Current Organisations
University of North Texas
,
Applied Materials
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Publisher: Springer Science and Business Media LLC
Date: 20-11-2015
DOI: 10.1038/NCOMMS9949
Publisher: American Chemical Society (ACS)
Date: 16-01-2019
Abstract: We demonstrated an N-doped graphene interface with highly switchable adhesion and robust micromanipulation capability triggered by external electric signals. Upon applying a small dc or ac electrical bias, this nanotextured surface can collect environmental moisture to form a large number of water bridges between the graphene and target surface, which lead to a drastic change in adhesive force. Turning on and off the electrical bias can control this graphene interface as a robust micro/nanomanipulator to pick up and drop off various micro/nano-objects for precise assembling. Molecular dynamics simulation reveals that the electrically induced electric double layer and ordered icelike structures at the graphene-water interface strengthen the water bridges and consequently enhance force switchability. In addition to the micro-/nanomanipulation, this switchable adhesion may have many technical implications such as climbing robots, sensors, microfluidic devices, and advanced drug delivery.
Publisher: American Chemical Society (ACS)
Date: 09-2019
DOI: 10.1021/ACS.LANGMUIR.9B01852
Abstract: We demonstrate a novel nanotextured graphene micropad that can rapidly harvest water from air to generate microscale water droplets with the desired size in designated positions on demand by simply applying a negative electric bias of -1.5 to -15 V. More interestingly, the water droplets can be reversibly dried nonthermally with the pad at ambient temperature in humid air (∼85% RH) by applying a positive electric bias of +1.5 to +15 V. The harvesting and drying rates on the glass are 2.7 and 1.5 μm
Publisher: Elsevier BV
Date: 06-2020
Publisher: Springer Science and Business Media LLC
Date: 14-01-2018
DOI: 10.1557/ADV.2018.51
Publisher: American Chemical Society (ACS)
Date: 03-06-2020
Publisher: Wiley
Date: 26-02-2018
Publisher: Frontiers Media SA
Date: 08-09-2021
DOI: 10.3389/FNANO.2021.667287
Abstract: Living organisms have evolved, over billions of years, to develop specialized biostructures with switchable adhesion for various purposes including climbing, perching, preying, sensing, and protecting. According to adhesion mechanisms, switchable adhesives can be ided into four categories: mechanically-based adhesion, liquid-mediated adhesion, physically-actuated adhesion and chemically-enhanced adhesion. Mimicking these biostructures could create smart materials with switchable adhesion, appealing for many engineering applications in robotics, sensors, advanced drug-delivery, protein separation, etc. Progress has been made in developing bioinspired materials with switchable adhesion modulated by external stimuli such as electrical signal, magnetic field, light, temperature, pH value, etc. This review will be focused on new advance in biomimetic design and synthesis of the materials and devices with switchable adhesion. The underlying mechanisms, design principles, and future directions are discussed for the development of high-performance smart surfaces with switchable adhesion.
No related grants have been discovered for Yiyang Wan.