Journal
ADVANCED MATERIALS
Volume 34, Issue 23, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202200980
Keywords
metallic nanocomposites; self-organization of nanomaterials; skin electronics; strain-insensitive resistance; stretchable conductors
Categories
Funding
- Institute for Basic Science [IBS-R006-D1, IBS-R006-A1]
- National Research Foundation (NRF) of Korea [2021R1A6A3A01086982]
- National Research Foundation of Korea [2021R1A6A3A01086982] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study presents a material strategy for highly conductive and stretchable nanocomposites by combining metal nanomaterials of various dimensions and a viscoelastic block-copolymer matrix. The resistance of the nanocomposites can be maintained under skin deformations, making them promising for skin electronics applications.
Highly conductive and stretchable nanocomposites are promising material candidates for skin electronics. However, the resistance of stretchable metallic nanocomposites highly depends on external strains, often deteriorating the performance of fabricated electronic devices. Here, a material strategy for the highly conductive and stretchable nanocomposites comprising metal nanomaterials of various dimensions and a viscoelastic block-copolymer matrix is presented. The resistance of the nanocomposites can be well retained under skin deformations (<50% strain). It is demonstrated that silver nanomaterials can self-organize inside the viscoelastic media in response to external strain when their surface is conjugated with 1-decanethiol. Distinct self-organization behaviors associated with nanomaterial dimensions and strain conditions are found. Adopting the optimum composition of 0D/1D/2D silver nanomaterials can render the resistance of the nanocomposites insensitive to uniaxial or biaxial strains. As a result, the resistance can be maintained with a variance of < 1% during 1000 stretching cycles under uniaxial and biaxial strains of <50% while a high conductivity of approximate to 31 000 S cm(-1) is achieved.
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