Journal of Mechanical Science and Technology

, Volume 33, Issue 4, pp 1891–1896 | Cite as

Development of tunable filters using self-folding technology

  • Paul Chastain
  • Minchul ShinEmail author


This paper seeks to demonstrate the functionality and verify the capabilities of capacitance adjustment by a self-folding device. The self-folding devices using polyvinyl chloride (PVC) shrink wrap and copper foil tapes with predefined creases were fabricated. By modifying a simple self-folding device and exposing it to a temperature between 50 to 90 degrees Celsius, the capacitor plates could be angled from 15 to 90 degrees. As a result, the capacitance changed as the inner angle decreased, from only 0.724 picofarads measured at 90 degrees, to 2.27 picofarads measured at 15 degrees. With the capacitance for each angle obtained, the next phase of development was conducted, to determine the tune-ability using a passive high pass filter. By scaling up the number of self-folding capacitors to thirty times, a cut-off frequency of 4.99 kHz at 15 degrees up to 7.25 kHz at 75 degrees was measured. As a result, this paper’s unique way of turning a self-folding device into a capacitor demonstrates great potential for development of tunable filters using capacitance adjustment and self-folding.


Capacitance Capacitor Self-folding Tunable 


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  1. [1]
    H. Eren, Capacitance measurement, Encyclopedia of Electrical & Electronics Engineering, 3(1) (1999) 1–15.MathSciNetGoogle Scholar
  2. [2]
    F. Haas and R. J. Wootton, Two basic mechanisms in insect wing folding, Proceedings of the Royal Society of London. Series B: Biological Sciences, 263(1377) (1996) 1651–1658.CrossRefGoogle Scholar
  3. [3]
    P. H. Todd, A geometric model for the cortical folding pattern of simple folded brains, Journal of Theoretical Biology, 97(3) (1982) 529–538.MathSciNetCrossRefGoogle Scholar
  4. [4]
    T. Eisner, Leaf folding in a sensitive plant: A defensive thorn-exposure mechanism, Proceedings of the National Academy of Sciences, 78(1) (1981) 402–404.CrossRefGoogle Scholar
  5. [5]
    H. Kobayashi, B. Kresling and J. F. Vincent, The geometry of unfolding tree leaves, Proceedings of the Royal Society of London. Series B: Biological Sciences, 265(1391) (1998) 147–154.CrossRefGoogle Scholar
  6. [6]
    S. Ahmed, Z. Ounaies and M. Frecker, Investigating the Performance and Properties of dielectric elastomer actuators as a potential means to actuate origami structures, Smart Materials and Structures, 23 (2014) 094003.CrossRefGoogle Scholar
  7. [7]
    N. Bassik, G. M. Stern and D. H. Gracias, Micro-assembly based on hands free origami with bidirectional curvature, Applied Physics Letters., 95(9) (2009) 091901.CrossRefGoogle Scholar
  8. [8]
    J. Guan, H. He, D. J. Hansford and L. J. Lee, Self-folding of three-dimensional hydrogel microstructures, Journal of Physical Chemistry B, 109(49) (2005) 23134–23137.CrossRefGoogle Scholar
  9. [9]
    R. Niiyama, D. Rus and S. Kim, Pouch motors: Printable/inflatable soft actuators for robotics, IEEE International Conference on Robotics and Automation (2014) 6332–6337.Google Scholar
  10. [10]
    E. Hawkes, B. An, N. M. Benbernou, H. Tanaka, S. Kim, E. D. Demaine, D. Rus and R. J. Wood, Programmable matter by folding, Proceedings of the National Academy of Sciences, 107(28) (2010) 12441–12445.CrossRefGoogle Scholar
  11. [11]
    Y. Liu, J. K. Boyles, J. Genzer and M. D. Dickey, Self-folding of polymer sheets using local light absorption, Soft Matter, 8(6) (2012) 1764–1769.CrossRefGoogle Scholar
  12. [12]
    M. T. Tolley, M. S. Felton, S. Miyashita, D. Aukes, D. Rus and R. J. Wood, Self-folding origami: shape memory composites activated by uniform heating, Smart Materials and Structures, 23(9) (2014) 094006.CrossRefGoogle Scholar
  13. [13]
    S, Miyashita, C. D. Onal and D. Rus, Multi-crease self-folding by global heating, Artificial Life, 21(4) (2015) 398–411.CrossRefGoogle Scholar
  14. [14]
    M. S. Felton, P. K. Becker, M. D. Aukes and J. R. Wood, Self-folding with shape memory composites at the millimeter scale, Journal of Micromechanics and Microengineering, 25(8) (2015) 085004.CrossRefGoogle Scholar
  15. [15]
    J. Ramirez-Angulo, Bandpass filters, Encyclopedia of Electrical & Electronics Engineering, 2(2) (1999) 218–222.Google Scholar
  16. [16]
    P. Horowitz and W. Hill, The Art of Electronics., 2nd Edition (1994) 59.Google Scholar
  17. [17]
    E. Iwase and I. Shimoyahma, Multistep sequential batch assembly of three-dimensional ferromagnetic microstructures with elastic hinges, Journal of Microelectromechanical Systems, 14(6) (2015) 1265–1271.CrossRefGoogle Scholar
  18. [18]
    S. Miyahita, C. D. Onal and D. Rus, Self-pop-up cylindrical structure by global heating, IEEE/RSJ International Conference on Intelligent Robots and Systems (2013) 4065–4071.CrossRefGoogle Scholar
  19. [19]
    M. T. Tolley, L. Meeker, S. Miyashita, D. Rus and R. J. Wood, Self-folding miniature elastic electric devices, Smart Materials and Structures, 23(9) (2014) 094005.CrossRefGoogle Scholar
  20. [20]
    Y. Liu, J. Genzer and M. D. Dickey, 2D or not 2D: Shape-programming polymer sheets, Progress in Polymer Science, 52 (2016) 79–106.CrossRefGoogle Scholar
  21. [21]
    C. D. Santangelo, Extreme mechanics: Self-folding origami, Annual Review of Condensed Matter Physics, 8 (2017) 165–183.CrossRefGoogle Scholar
  22. [22]
    S. Sundaram, D. S. Kim, M. A. Baldo, R. C. Hayward and W. Matusik, 3D-printed self-folding electronics, Applied Materials & Interfaces, 9(37) (2017) 32290–32298.CrossRefGoogle Scholar
  23. [23]
    G. J. Hayes, Y. Liu, J. Genzer, G. Lazzi and M. D. Dickey, Self-folding origami microstrip antennas, IEEE Transactions on Antennas and Propagation, 10(62) (2014) 5416–5419.CrossRefzbMATHGoogle Scholar
  24. [24]
    M. Nogi et al., Foldable nanopaper antennas for origami electronics, Nanoscale, 10(5) (2013) 4395–4399.CrossRefGoogle Scholar
  25. [25]
    K. Han, C. W. Sheilds, N. M. Diwakar, B. Bharti, G. P. Lopez and O. D. Velev, Sequence-encoded colloidal origami and microbot assemblies from patchy magnetic cubes, Science Advances, 8(3) (2017).Google Scholar
  26. [26]
    C. M. Andres, J. Zhu, T. Shyu, C. Flynn and N. A. Kotov, Shape-morphing nanocomposite origami, Langmuir, 30 (2014) 5378–5385.CrossRefGoogle Scholar
  27. [27]
    R. Bhattacharyya, C. D. Leo, C. Floerkemeier, S. Sarma and L. Anand, RFID tag antenna based temperature sensing using shape memory polymer actuation, IEEE Sensors, Kona, HI, USA, 1–4 Nov. (2010).Google Scholar

Copyright information

© KSME & Springer 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringGeorgia Southern UniversityStatesboroUSA

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