Visualization of dynamic interlinking networks which respond and adapt to the constantly changing environment would be highly beneficial in developing new composite materials and active/responsive materials. Here, optically and structurally stabilized plasmo‐bio interlinking networks (PBINs) free from photobleaching for high resolution, long term visualization are reported. Necessary for structural and optical stability, a new stability algorithm to comprehensively quantify stability and detect minute instability undetectable by traditional methods is introduced. Biocompatible plasmonic gold nanorods (Bio‐AuNRs) are synthesized for high resolution, long term imaging by utilizing bromide‐free alternatives to achieve CTA+ free. Systematic physical, chemical, and biological characterizations reveal the structural and optical stability of Bio‐AuNRs required for constructing PBIN. Lastly, with actin as a model of interlinking networks of the cytoskeleton, optically and structurally stable PBIN (100% CTA+ free, 97% crosslinking rate) in applications as active/responsive materials, are demonstrated.
Polymers
with broad infrared emission and negligible solar absorption
have been identified as promising radiative cooling materials to offer
a sustainable and energy-saving venue. Although practical applications
desire color for visual appearance, the current coloration strategies
of polymer-based radiative cooling materials are constrained by material,
cost, and scalability. Here, we demonstrate a universally applicable
coloration strategy for polymer-based radiative cooling materials
by nanoimprinting. By modulating light interference with periodic
structures on polymer surfaces, specular colors can be induced while
maintaining the hemispheric optical responses of radiative cooling
polymers. The retrofit strategy is exemplified by four different polymer
films with a minimum impact on optical responses compared to the pristine
films. Polymer films feature low solar absorption of 1.7–3.7%,
and daytime sub-ambient cooling is exemplified in the field test.
The durability of radiative cooling and color are further validated
by dynamic spectral analysis. Finally, the potential roll-to-roll
manufacturing empowers a scalable, low-cost, and easy-retrofitting
solution for colored radiative cooling films.
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