Date

Place

Room H (Room Hall 1, 1F)
P1. Poster Session I
August 20, 2015 (Thursday)
14:00 ~ 15:30

[P1-20]
14:00 ~ 15:30
Title:Stretchable Transparent Capacitive Touch Sensors Based on Spin-Coated Silver-Nanowire Composite Electrodes
Tae Young Choi, Byeong-Ung Hwang, and Nae-Eung Lee (Sungkyunkwan Univ., Korea)
Abstract: We developed highly stable transparent electrode under stretched environment using simple spin-coated AgNW composite. For optimal stretchable electrode, two kinds of AgNW films, thick and thin nanowires, were compared. Thin AgNW film showed better characteristics of 21.35��/�� and 92.7%.?In comparison of stretchabilities, thin AgNW film on PDMS substrate also showed better stretching characteristics due to its higher aspect ratio of nanowire (length/diameter) than thick AgNW film. Assuming the same young��s modulus, stiffness of nanowire is proportional to the cross sectional area of nanowire and inversely proportional to the length. This is the reason why thin nanowire film showed better stretchable characteristics. To enhance the stretchability, polyurethane (PU) solutions were spin-coated on the AgNW films. However, resistances of PU coating samples changed more than non-coating samples. It is supposed that adhesion of AgNW film on PU was superior?to on PDMS, so that AgNW films were delaminated from PDMS substrate under stretching conditions. PDMS surface recovers its hydrophobicity slowly even after long-time O2 plasma treatment. We are under modifying surface treament and PU coating condition. Nontheless, the film conductance showed excellently stable under cyclic stretching test up to 10000 times. Additionally, capactive touch sensors were also demonstrated.
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