Monthly Archives: February 2018

Cephalopod-inspired Design of Electro-mechano-chemically Responsive Elastomers for On-demand Fluorescent Patterning

Journal: Nature Communications

Publication date: 2014.09.16

Summarized by Seongmin Park

 

– Squid Coloration Principle
v. Pigment-containing sac: Area controlled by radial muscle
v. Radial muscle: control colored area

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Fig. 1

 

– EMCR elastomer
v. Fabrication of electro-mechano-chemically responsive (EMCR) elastomer – Figure 2
v. Applying force → fluorescent, applying visible light → transparent – Figure 3

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Fig. 2

fig3.png

Fig. 3

 

– Applied strain vs. fluorescent intensity
v. Figure 4

fig4.png

Fig. 4

 

– Electrically controllable structure
v. Initial structure – Figure 5
v. With high electric field – Figure 6
v. Induced high strain – Figure 7

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Fig. 5

fig6.png

Fig. 6

fig7.png

Fig. 7

 

– Wrinkle generation principle
v. Cratered structure is more stable than flat structure when it’s in high electric field – Figure 8, 9

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Fig. 8

fig9

Fig. 9

 

– Electric field vs. color image
v. Figure 10

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Fig. 10

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Fig. 11

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Hydraulically amplified self-healing electrostatic actuators with muscle-like performance

Journal: MATERIALS SCIENCE

Author: Xin Lin , Berthold Wegner et. al

Affiliation: Department of Mechanical Engineering, University of Colorado

Publication date: 2018.01.05

Summarized by Taewon Seo

 

– HASEL actuators
v. Schematic of a donut HASEL actuator (Fig. 1)
v. Schematic of a stack of five donut HASEL actuators (Fig. 2)
v. Schematic of a single-unit planar HASEL actuator (Fig. 3)

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Fig. 1

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Fig. 2

fig3.jpg

Fig. 3

 

– Fabrication
v. For a donut HASEL (Fig. 4)
v. For a single-unit planar HASEL (Fig. 5)
v. Flexible electrodes of PAM-LiCl hydrogels (thickness of 200μm)
v. Self-healing Liquid dielectric of Envirotemp FR3 (Cargill)

 

fig4.jpg

Fig. 4

fig5.jpg

Fig. 5

 

– Self healing
v. Self-healing from dielectric breakdown (Fig. 6)
v. Self-healing capabilities (Fig. 7)
v. Supporting information : http://science.sciencemag.org/highwire/filestream/704298/field_highwire_adjunct_files/2/aao6139s2.mp4

fig6.jpg

Fig. 6

fig7.jpg

Fig. 7

 

– Result
v. Actuation strain of a donut HASEL (Fig. 8)
v. Cycle life of a donut HASEL (Fig. 9)
v. Actuation strain of a single-unit planar HASEL (Fig. 10)
v. Supporting information : https://www.youtube.com/watch?v=M4qcvTeN8k0

fig8.jpg

Fig. 8

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Fig. 9

fig10.jpg

Fig. 10