writer：Jian Zhao, Qian Li, Bianliang Miao, Hemu Pi, Peng Yang*
keywords：long-distance wireless control, photoactuation, amyloid-like protein, bioadhesion, reduced graphene oxide
source：期刊
specific source：Small
Issue time：2020年
Long-distance wireless actuation indicates precise remote control over materials, sensors and devices that are widely utilized in biomedical, defence, disaster relief, deep ocean and outer space applications to replace human work. Unlike radio frequency (RF) control, which has low tolerance towards electromagnetic interference (EMI), light control represents a promising method to overcome EMI. Nonetheless, long-distance light-controlled wireless actuation able to compete with RF control has not been achieved until now due to the lack of highly light-sensitive actuator designs. Here, we demonstrate that amyloid-like protein aggregates could organize photomodule single-layer reduced graphene oxide (rGO) into a well-defined multilayer stack to display long-distance photoactuation. It is found that in addition to reducing the disulfide bond of lysozyme to trigger fast amyloid-like aggregation, a reducing reagent tris(2-carboxyethyl)phosphine (TCEP) simultaneously interacts with the GO to facilitate high-level restoration of the sp2 network of graphene, standing out among reductants reported in the literature. The amyloid-like proteinaceous component docks the rGO layers together to form a hybrid film, which could reliably adhere onto various material surfaces with robust interfacial adhesion. Owing to these features, the sensitive photothermal effect and a fast bending in 1 s to switch a circuit are achieved after forming the film on a plastic substrate and irradiating the bilayer film with a blue laser from at 100 m away, which, to the best of our knowledge, has never been reported before. A photoactuation distance at 50 km could be further extrapolated based on commercial high-power laser. This study reveals the great potential of amyloid-like aggregates in remote light-control of robots and devices.
Jian Zhao, Qian Li, Bianliang Miao, Hemu Pi, Peng Yang*, Controlling Long-Distance Photoactuation with Protein Additives. Small 2020, Just Accepted, DOI: smll.202000043.