Smart strategy of butterfly wing scales to control the light diffusion
				and absorption

Priyanka,; Saini, Sudhir Kumar; Sharma, Sachin; Singh, Nitesh Kumar; Khokhar, Megha; Nair, Rajesh V.

doi:10.1364/josab.426003

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…With the rapid development of technology, the consumption of energy increased continuously and has led to a serious environmental crisis. [1][2][3] However, in nature, many creatures such as morpho butterflies, [4,5] chameleons, [6,7] silver ants, [8,9] and other terrestrial ectotherms [10][11][12][13] can remain their body temperature by spectral controlling. Chameleons that live in the desert of light energy is reflected, thus the body temperature is protected from rising (Figure 1d).…”

Section: Introductionmentioning

confidence: 99%

An Artificial Chameleon Skin for Dynamic Thermoregulation

Liu

Zhu

Gao

et al. 2023

Adv Materials Inter

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Namibia can adapt to environmental temperatures by changing their body colors between black and white. Their skins are dark in the morning to adsorb more solar radiation to reach an active body temperature, and then become white at hot noon to reflect solar energy to protect body temperature (Figure 1a). This physiological process is accomplished by moving melanin particles up and down around the thick layer of D-iridophores, which can reflect infrared light for thermal protection (Figure 1b). [14,15] Inspired by natural creatures, a wide variety of materials with specific functionalities such as high solar radiation absorption (e.g., carbon materials, [16][17][18][19][20][21] noble metal nanoparticles, [22,23] and structural materials [24][25][26][27] ) or reflection (whiteness [28,29] and metals [30,31] ) were reported. However, it is still a great challenge to design materials with both thermal adsorption and reflection functions to adapt to the dynamic surrounding environments. Up to date, most dynamic thermoregulatory materials were achieved by changing from transparent to opaque with temperature varies. Besides VO 2 , the most widely used traditional thermoregulatory material, [32][33][34] thermoresponsive hydrogels and microgels were also reported for thermoregulation. [35][36][37] Here, we designed a light-responsive artificial chameleon skin that can sense temperature and alter its color expression by emulating the self-thermoregulation mechanism of Namibia chameleons. The strategy is to prepare patterned film with dynamic area change of solar energy adsorption and reflection. The artificial skin consists of two parts: the thermoresponsive black part for light harvesting, and the stretchable white part for light reflection (Figure 1c). The black part is made of poly(Nisopropylacrylamide) (PNIPAM) hydrogel embedded with polydopamine (PDA) nanoparticles, which can adsorb light and convert it to heat; the white part is made of stretchable polyacrylamide (PAM) hydrogel embedded with polystyrene (PS) colloids, which reflect light like large guanine crystals. At low light irradiation and low temperature, the dark film dominates the surface, and the PDA nanoparticles adsorb the weak light and generate heat to increase body temperature. At high light irritation, when the temperature reaches the volume phase transition temperature (VPTT) of the PNIPAM hydrogel, the dark part begins to shrink, which in turn stretches the white PAM film to spread, and then the white part dominates the film and more Solar radiation is the major energy source for most living creatures, and some creatures change their skin colors responding to energy demands. Inspired by the chameleons that live in the desert of Namibia, which can regulate body temperature by changing skin colors between black and white, a patterned hydrogel film with self-thermoregulation ability is reported in this work. The film consists of two parts: a lightresponsive black part and a stretchable white part. The black part is made of thermoresponsive poly(N-isopro...

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Section: Introductionmentioning

confidence: 99%

An Artificial Chameleon Skin for Dynamic Thermoregulation

Liu

Zhu

Gao

et al. 2023

Adv Materials Inter

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“…explored the structural basis of the Koi fish scale, which is responsible for glossy reflectance . On the other side, photon diffusion and absorption processes are responsible for the beautiful colors in butterfly wings . Naturally textured surfaces can be efficiently used as promoters of nanoparticle aggregation and hotspot formation .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Light Scattering Using a Two-Dimensional Quasicrystal-Decorated 3D-Printed Nature-Inspired Bio-photonic Architecture

et al. 2023

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A number of strategies have been exploited so far to trap photons inside living cells to obtain high-contrast imaging. Also, launching light inside biological materials is technically challenging. Using photon confinement in a three-dimensional (3D)-printed biomimetic architecture in the presence of a localized surface plasmon resonance (LSPR) promoter can overcome some of these issues. This work compares optical confinement in natural and 3D-printed photonic architectures, namely, fish scale, in the presence of atomically thin Al 70 Co 10 Fe 5 Ni 10 Cu 5 quasicrystals (QCs). Due to their wideband LSPR response, the QCs work as photon scattering hotspots. The architecture acts as an additive source of excitation for the two-dimensional (2D) QCs via total internal reflection (TIR). The computational analysis describes the surface plasmon-based scattering property of 2D QCs. The 3D-printed fish scale's image contrast with the 2D Al 70 Co 10 Fe 5 Ni 10 Cu 5 QC has been compared with other 2D materials (graphene, h-BN, and MoS 2 ) and outperforms them. The present study conceptually presents a new approach for obtaining high-quality imaging of biological imaging, even using high-energy photons.

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