Smart Silk Origami as Eco-sensors for Environmental Pollution.
Saphia A L MatthewGemma EganKimia WitteJirada KaewchuchuenSuttinee PhuagkhaopongJohn D TottenF Philipp SeibPublished in: ACS applied bio materials (2022)
Origami folding is an easy, cost-effective, and scalable fabrication method for changing a flat material into a complex 3D functional shape. Here, we created semicrystalline silk films doped with iron oxide particles by mold casting and annealing. The flat silk films could be loaded with natural dyes and folded into 3D geometries using origami principles following plasticization. They performed locomotion under a magnetic field, were reusable, and displayed colorimetric stability. The critical parameters for the design of the semi-autonomous silk film, including ease of folding, shape preservation, and locomotion in the presence of a magnetic field, were characterized, and pH detection was achieved by eye and by digital image colorimetry with a response time below 1 min. We demonstrate a practical application─a battery-free origami silk boat─as a colorimetric sensor for waterborne pollutants, which was reusable at least five times. This work introduces silk eco-sensors and merges responsive actuation and origami techniques.
Keyphrases
- tissue engineering
- wound healing
- gold nanoparticles
- room temperature
- hydrogen peroxide
- single molecule
- drug delivery
- cancer therapy
- risk assessment
- molecular dynamics simulations
- human health
- low cost
- iron oxide
- deep learning
- machine learning
- fluorescent probe
- living cells
- aqueous solution
- health risk assessment
- highly efficient
- carbon nanotubes
- loop mediated isothermal amplification