Topological acoustofluidics

IF 37.2 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Shuaiguo Zhao, Zhenhua Tian, Chen Shen, Shujie Yang, Jianping Xia, Teng Li, Zhemiao Xie, Peiran Zhang, Luke P. Lee, Steven A. Cummer, Tony Jun Huang
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引用次数: 0

Abstract

The complex interaction of spin, valley and lattice degrees of freedom allows natural materials to create exotic topological phenomena. The interplay between topological wave materials and hydrodynamics could offer promising opportunities for visualizing topological physics and manipulating bioparticle unconventionally. Here we present topological acoustofluidic chips to illustrate the complex interaction between elastic valley spin and nonlinear fluid dynamics. We created valley streaming vortices and chiral swirling patterns for backward-immune particle transport. Using tracer particles, we observed arrays of clockwise and anticlockwise valley vortices due to an increase in elastic spin density. Moreover, we discovered exotic topological pressure wells in fluids, creating nanoscale trapping fields for manipulating DNA molecules. We also found a 93.2% modulation in the bandwidth of edge states, dependent on the orientation of the substrate’s crystallographic structure. Our study sets the stage for uncovering topological acoustofluidic phenomena and visualizing elastic valley spin, revealing the potential for topological-material applications in life sciences.

Abstract Image

拓扑acoustofluidics
自旋、谷和晶格自由度的复杂相互作用使天然材料能够产生奇异的拓扑现象。拓扑波材料与流体力学之间的相互作用为拓扑物理的可视化和生物颗粒的非常规操作提供了有希望的机会。本文提出了拓扑声流控芯片来说明弹性谷自旋和非线性流体动力学之间复杂的相互作用。我们创造了谷流漩涡和手性漩涡模式,用于向后免疫粒子运输。利用示踪粒子,我们观察到由于弹性自旋密度的增加,顺时针和逆时针的谷涡阵列。此外,我们在流体中发现了奇特的拓扑压力井,创造了纳米级的捕获场,用于操纵DNA分子。我们还发现,根据衬底晶体结构的取向,边缘状态的带宽有93.2%的调制。我们的研究为揭示拓扑声流现象和可视化弹性谷自旋奠定了基础,揭示了拓扑材料在生命科学中的应用潜力。
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来源期刊
Nature Materials
Nature Materials 工程技术-材料科学:综合
CiteScore
62.20
自引率
0.70%
发文量
221
审稿时长
3.2 months
期刊介绍: Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.
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