Iridescent colours have been fascinating to humans throughout history; they are flashy, shimmering, dynamic, and examples surround us, from the commonly seen iridescent sheen of oily street puddles to the exotic, gaudy displays of birds-of-paradise featured in nature documentaries. Iridescent colours and the structures that produce them have unique properties in comparison with other types of colourants found in nature. Scientists from a variety of disciplines study the optics, development, heritability, chemical make-up, origin, evolution, functions and biomimetic technological applications of naturally occurring iridescent colours. For the first time, graduate students at Arizona State University brought together these scientists, along with educators and artists, at 'Iridescence: more than meets the eye', a conference to promote interdisciplinary communication and collaboration in the study of iridescent coloration from all of these perspectives. Here, we summarize the outcomes of this conference, introduce the papers that follow in this special journal issue and briefly review the current status of our understanding of iridescence.
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http://dx.doi.org/10.1098/rsif.2009.0013.focus | DOI Listing |
Small
December 2024
Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
Cellulose nanocrystals (CNCs) are known to self-assemble into a left-handed chiral nematic lyotropic liquid crystalline phase in water. When captured in the solid state, this structure can impart films with photonic properties that make them promising candidates in photonics, sensing, security, and other areas. Unfortunately, the intrinsic hydrophilicity of CNCs renders these iridescent films susceptible to moisture, thereby limiting their practicality.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, United States.
In situ monitoring of small molecule diffusion at solid-solid interfaces is challenging, even with sophisticated equipment. Here, novel chromogenic photonic crystal detectors enabled by integrating bioinspired structural color with stimuli-responsive shape memory polymer (SMP) for detecting trace amounts of small molecule interfacial diffusion are reported. Colorless macroporous SMP membranes with deformed macropores can recover back to the "memorized" photonic crystal microstructures and the corresponding iridescent structural colors when triggered by diffused small molecules.
View Article and Find Full Text PDFAdv Mater
December 2024
Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA.
J Colloid Interface Sci
February 2025
School of Mechanical, Medical and Process Engineering, Centre for Agriculture and the Bioeconomy, Queensland University of Technology, 2 George St, Brisbane, Qld 4000, Australia. Electronic address:
Flexible photonic materials derived from cellulose nanocrystals (CNCs) have attracted significant attention, particularly in multifunctional sensors, intelligent detection, and anti-counterfeiting applications. However, the major bottleneck with traditional CNC photonic materials is the provision of flexibility and multifunctional properties which often comes with compromises in optical properties. To address these challenges, we incorporated organosolv lignin nanoparticles (LNPs) and polyethylene glycol (PEG) into CNC films.
View Article and Find Full Text PDFAdv Mater
December 2024
The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, China.
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