Timothy J Lee1, Colby F Lewallen2, Daniel J Bumbarger3, Peter J Yunker4, R Clay Reid5, Craig R Forest6. 1. Georgia Institute of Technology, G. W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332, USA. Electronic address: timothy.lee@gatech.edu. 2. Georgia Institute of Technology, G. W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332, USA. Electronic address: colby.lewallen@gatech.edu. 3. Allen Institute for Brain Science, Seattle, WA 98109, USA. Electronic address: danb@alleninstitute.org. 4. Georgia Institute of Technology, School of Physics, Atlanta, GA 30332, USA. Electronic address: peter.yunker@gatech.edu. 5. Allen Institute for Brain Science, Seattle, WA 98109, USA. Electronic address: clayr@alleninstitute.org. 6. Georgia Institute of Technology, G. W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332, USA. Electronic address: cforest@gatech.edu.
Abstract
HYPOTHESIS: The manipulation of nanosheets on a fluid-fluid interface remains a significant challenge. At this interface, hydrodynamic forces can be used for long-range transport (>1× capillary length) but are difficult to utilize for accurate and repeatable positioning. While capillary multipole interactions have been used for particle trapping, how these interactions manifest on large but thin objects, i.e., nanosheets, remains an open question. Hence, we posit hydrodynamic forces in conjunction with capillary multipole interactions can be used for nanosheet transport and trapping. EXPERIMENTS: We designed and characterized a fluidic device for transporting and trapping nanosheets on the water-air interface. Analytical models were compared against optical measurements of the nanosheet behavior to investigate capillary multipole interactions. Energy-based modeling and dimensional analysis were used to study trapping stability. FINDINGS: Hydrodynamic forces and capillary interactions successfully transported and trapped nanosheets at a designated trapping location with a repeatability of 10% of the nanosheet's length and 12% of its width (length = 1500 µm, width = 1000 µm) and an accuracy of 20% of their length and width. Additionally, this is the first report that surface tension forces acting upon nanoscale-thick objects manifest as capillary quadrupolar interactions and can be used for precision manipulation of nanosheets.
HYPOTHESIS: The manipulation of nanosheets on a fluid-fluid interface remains a significant challenge. At this interface, hydrodynamic forces can be used for long-range transport (>1× capillary length) but are difficult to utilize for accurate and repeatable positioning. While capillary multipole interactions have been used for particle trapping, how these interactions manifest on large but thin objects, i.e., nanosheets, remains an open question. Hence, we posit hydrodynamic forces in conjunction with capillary multipole interactions can be used for nanosheet transport and trapping. EXPERIMENTS: We designed and characterized a fluidic device for transporting and trapping nanosheets on the water-air interface. Analytical models were compared against optical measurements of the nanosheet behavior to investigate capillary multipole interactions. Energy-based modeling and dimensional analysis were used to study trapping stability. FINDINGS: Hydrodynamic forces and capillary interactions successfully transported and trapped nanosheets at a designated trapping location with a repeatability of 10% of the nanosheet's length and 12% of its width (length = 1500 µm, width = 1000 µm) and an accuracy of 20% of their length and width. Additionally, this is the first report that surface tension forces acting upon nanoscale-thick objects manifest as capillary quadrupolar interactions and can be used for precision manipulation of nanosheets.
Authors: Marcello Cavallaro; Lorenzo Botto; Eric P Lewandowski; Marisa Wang; Kathleen J Stebe Journal: Proc Natl Acad Sci U S A Date: 2011-12-19 Impact factor: 11.205
Authors: Xiaoyun Ding; Sz-Chin Steven Lin; Brian Kiraly; Hongjun Yue; Sixing Li; I-Kao Chiang; Jinjie Shi; Stephen J Benkovic; Tony Jun Huang Journal: Proc Natl Acad Sci U S A Date: 2012-06-25 Impact factor: 11.205
Authors: Davi D Bock; Wei-Chung Allen Lee; Aaron M Kerlin; Mark L Andermann; Greg Hood; Arthur W Wetzel; Sergey Yurgenson; Edward R Soucy; Hyon Suk Kim; R Clay Reid Journal: Nature Date: 2011-03-10 Impact factor: 49.962
Authors: Timothy J Lee; Aditi Kumar; Aishwarya H Balwani; Derrick Brittain; Sam Kinn; Craig A Tovey; Eva L Dyer; Nuno M da Costa; R Clay Reid; Craig R Forest; Daniel J Bumbarger Journal: PLoS One Date: 2018-10-23 Impact factor: 3.240