Dynamic plasmonic colour display

Abstract

Plasmonic colour printing based on engineered metasurfaces has revolutionized colour display science due to its unprecedented subwavelength resolution and high-density optical data storage. However, advanced plasmonic displays with novel functionalities including dynamic multicolour printing, animations, and highly secure encryption have remained in their infancy. Here we demonstrate a dynamic plasmonic colour display technique that enables all the aforementioned functionalities using catalytic magnesium metasurfaces. Controlled hydrogenation and dehydrogenation of the constituent magnesium nanoparticles, which serve as dynamic pixels, allow for plasmonic colour printing, tuning, erasing and restoration of colour. Different dynamic pixels feature distinct colour transformation kinetics, enabling plasmonic animations. Through smart material processing, information encoded on selected pixels, which are indiscernible to both optical and scanning electron microscopies, can only be read out using hydrogen as a decoding key, suggesting a new generation of information encryption and anti-counterfeiting applications.

MOF‐Derived Copper Nitride/Phosphide Heterostructure Coated by Multi‐Doped Carbon as Electrocatalyst for Efficient Water Splitting and Neutral‐pH Hydrogen Evolution Reaction

“…Owing to its uniform 3D structure, large surface area and well distribution of active metal sites, metal organic frameworks (MOFs) have aroused considerable interests in large variety of potential applications, including electrocatalytic energy conversion. [21][22][23][24][25][26][27] However, the pristine MOFs are not appropriate for electrocatalysis due to poor conductivity. To overcome this issue, significant research work has been carried out recently in which MOF derived materials were synthesized using MOF precursor, and evidences in terms of increase in its electrical conductivity.…”

Quantitatively Correlated Amplitude Holography Based on Photon Sieves

“…By using active materials that have tunable optical properties under different external conditions, such as phase change material (PCM), [33,34] plasmonic material (Mg/MgH 2 ), [35][36][37][38] and graphene/graphene oxide, [39] the switchable metasurface holograms can be designed. By using active materials that have tunable optical properties under different external conditions, such as phase change material (PCM), [33,34] plasmonic material (Mg/MgH 2 ), [35][36][37][38] and graphene/graphene oxide, [39] the switchable metasurface holograms can be designed.…”

Bimetal−Organic Framework Derived High‐Valence‐State Cu‐Doped Co3O4 Porous Nanosheet Arrays for Efficient Oxygen Evolution and Water Splitting

“…To gain deeper insight into the OER performance, the catalytic kinetic behaviors were evaluated by Tafel plots (Figure 3b [55,56] Furthermore, the Cu/Co composition ratio in the precursors also have important impacts on the OER performances of the obtained CuÀ Co 3 O 4 NAs/NF. When the Cu/Co ratio was 1 : 9, the best OER performance was reached ( Figure S9), indicating the optimal composition of the CuÀ Co 3 O 4 NAs/NF.…”