15 septembre 2021

[Nanotechnology] – Artificial camouflage skin.

Accueil > Actualités > [Nanotechnology] – Artificial camouflage skin.
Flèche contenu
Nanotechnology Camouflage - Codex International

Artificial camouflage that imitates concealment technologies existing in the natural world, such as the ones found in chameleon and octopus, is recently attracting a great attention for various military applications in the forms of wearable devices and soft robots.

However, in the previous studies, the pixelated artificial camouflage device had a disadvantage in that the concealment efficiency was considerably lowered in the background where a pattern smaller than an individual pixel was required.

In addition, for practical application as a camouflage device, real-time background sensing ability is required, but this active camouflage technology has not yet been implemented due to the complexity of the required system.

Recently, Prof. Seung hwan Ko’s group at Seoul National University in the Republic of Korea has developed a wearable artificial chameleon skin that can conceal itself immediately by detecting the surrounding background in real-time.

By layering thermochromic liquid crystal (TLC) ink and the vertically-stacked multilayer silver (Ag) nanowire (NW) heaters, Ko’s group tackled the obstacles raised from the earlier concept and developed more practical, scalable, and high-performance artificial camouflage at a complete device level.

The research group enables colorful camouflage device by incorporating TLC ink at the surface that changes light reflectance based on the device temperature, enabling the expression of various colors by changing the temperature via the Ag NW heaters. Since these vertically-stacked Ag NW network heater has a different pattern for each layer, it is possible to activate either a single layer selectively or multiple layers simultaneously to exhibit a wide range of colors and patterns.

In addition to the device’s capability of high-resolution crypsis, the device has a real-time sensing system that enables blending into the background immediately. Based on this unique feature, the research group demonstrated the actual artificial chameleon robot that is capable of camouflaging into the colorful and complex background in real-time.

 

Découvrez aussi
[Quantum Material] – Topological quantum phase in 2D MoTe2 induced by light 30 septembre 2020

A joint research team from Fudan University, Institute of Physics at Chinese Academy of Science, University of Cambridge, Wenzhou University, Shizuoka University, and Iowa State University has provided an example of on-demand control of quantum phenomena to design the quantum materials.

Lire la suite
Philips Photonics passes billion-VCSEL milestone 3 décembre 2018

Firm aiming to double production capacity at its Ulm, Germany, facility within the next 18 months.

No slowdown: Philips is continuing to expand VCSEL production
Philips Photonics says that the proliferation of applications for vertical-cavity surface-emitting lasers (VCSELs) in 3D and proximity sensing means it has now passed the shipment milestone of one billion such devices.

Lire la suite