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- Title
DNA used as a "double helix" template for synthesis of flexible silver strings for conductive and electromagnetic shielding of cotton fabrics.
- Authors
Wang, Xinyu; Xu, Qingbo; Zhang, Junhua; Chen, Qian
- Abstract
Conductive cotton fabrics are increasingly used in intelligent wearables and as electromagnetic shielding. Cotton fabrics can be endowed with conductive properties by immobilizing conductive inorganic substances on them or by coating them with conductive polymers; however, cracking of the coating results in a sharp decrease in its conductive properties and limits the applications. To solve this problem, a binder of carboxymethyl chitosan and l-cysteine was used to adhere DNA strands onto the cotton fabric as a "double helix" template for the formation of conductive silver nanoparticle strings. The DNA was used to adsorb silver ions (Ag+); double-helix strings of silver nanoparticles (Ag NPs) were subsequently synthesized on the cotton fabric on exposure to a reducing agent. As a result of the double-helix structure, the Ag NP strings had a degree of elasticity and the conductive coating on the finished cotton fabric was very stable under the action of external forces. Even the finished fabric after withstand stretching, folding, or bending treatments, the surface resistance did not increase significantly. Finished fabrics prepared using this method therefore have excellent conductive stability, which considerably expands the range of application for conductive cotton fabrics.
- Subjects
COTTON textiles; ELECTROMAGNETIC shielding; CONDUCTING polymers; SILVER nanoparticles; SURFACE resistance
- Publication
Cellulose, 2024, Vol 31, Issue 4, p2603
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-024-05740-z