Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201801683
Keywords
composite thin films; conductive fibers; ultrathin films; wearable electronics
Categories
Funding
- National Natural Science Foundation [21727808, 21604038, 21574065, 21604040]
- National Science Foundation for Distinguished Young Scholars [21625401]
- Jiangsu Provincial Founds for Natural Science Foundation [BK20160975, BK20160981]
- National Key R&D Program of China [2017YFA0207201]
- Ministry of Education of Singapore [MOE2014-T2-2-140]
- Program for Outstanding Young Scholars from the Organization Department of the CPC Central Committee
- SICAM Scholarship by Jiangsu National Synergetic Innovation Center for Advanced Materials
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Stretchability plays an important role in wearable devices. Repeated stretching often causes the conductivity dramatically decreasing due to the damage of the inner conductive layer, which is a fatal and undesirable issue in this field. Herein, a convenient rolling strategy to prepare conductive fibers with high stretchability based on a spiral structure is proposed. With the simple rolling design, low resistance change can be obtained due to confined elongation nof the gold thin-film cracks, which is caused by the encapsulated effect in such a structure. When the fiber is under 50% strain, the resistance change (R/R-0) is about 1.5, which is much lower than a thin film at the same strain (R/R-0 approximate to 10). The fiber can even afford a high load strain (up to 100%), but still retain good conductivity. Such a design further demonstrates its capability when it is used as a conductor to confirm signal transfer with low attenuation, which can also be woven into textile to fabricate wearable electronics.
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