ABSTRACT Photonic structures at the wavelength scale offer innovative energy solutions for a wide range of applications, from high-efficiency photovoltaics to passive cooling, thus reshaping the global energy landscape. Radiative cooling based on structural and material design presents new opportunities for sustainable carbon neutrality as a zero-energy, ecologically friendly cooling strategy. In this review, in addition to introducing the fundamentals of the basic theory of radiative cooling technology, typical radiative cooling materials alongside their cooling effects over recent years are summarized and the current research status of radiative cooling materials is outlined and discussed. Furthermore, technical challenges and potential advancements for radiative cooling are forecast with an outline of future application scenarios and development trends. In the future, radiative cooling is expected to make a significant contribution to global energy saving and emission reduction.

https://academic.oup.com/nsr/article-pdf/10/1/nwac208/48727963/nwac208.pdf

Radiative cooling for passive thermal management towards sustainable carbon neutrality

EDITORIAL: 'In the short but hot summer nights, only by opening doors and windows can the room be cooled down slightly' complained the famous Chinese poet Fu Du in his poem Summer Night Lament more than 1000 years ago. Currently, people are suffering from the summer heat, with ambient temperatures around or exceeding 40 °C. Phrases such as "killer hot days" are no longer exaggerated statements. Hot weather can not only frustrate people, but also make people sick or even endanger lives owing to heatstroke. Fortunately, scientists have come up with a great invention, which will provide us with some much-needed relief in hot summers-the optical metafabric. The magic of this innovation is that, although it feels just like a normal fabric and has all the necessary properties of a wearable fabric, a garment made with it can cool down one's body by nearly 5 °C even under direct sunlight, making it ideal for summer clothing. In the last few years, a team led by Prof. Guangming Tao of Huazhong University of Science and Technology has achieved remarkable progress in the area of optical metafabrics, finding new applications for this material and making it more affordable. Now, please follow our Light Science Editor as he explores this amazing new material and finds how it has been used in the industry, society, and Winter Olympics. 

/pdf/light-people-professor-guangming-tao-35ra6xah.pdf

Light People: Professor Guangming Tao

The metaverse is a virtual environment where people may interact with one another via avatars. As the metaverse has gained in popularity over the last several years, the retail industry has indicated an interest in using it for product promotion and sales. However, opening a clothes store in the metaverse has unique challenges, and prospective investors should keep a few things in mind. This study aimed to uncover the factors that led Dubai investors to create a virtual apparel brand for sale online. Independent factors were creativity, safety, and confidentiality. The advent of Dubai's Metaverse clothes store was the dependent variable, while the technology enabling the metaverse was the mediator. The study used a quantitative methodology, including a survey questionnaire. For demographic and structural equation modeling objectives, we employed SPSS and AMOS software. The mediator variable was shown to be significantly affected by all independent factors, according to data from a survey of 398 participants. The successful debut of apparel in the metaverse in Dubai may be primarily attributed to the metaverse's cutting-edge technological innovations in security and privacy. Customers may be unwilling to provide personal information or engage in virtual transactions if they do not trust the safety of their data in the metaverse; thus, these issues must be addressed. Investors should prioritize developing private and secure metaverse technologies to win users' confidence. The findings call attention to the absence of study in this area and provide valuable insight into the factors contributing to the success of retail clothes launches in the metaverse. When taken as a whole, this study paves the way for more investigation into the metaverse and its possible implications on the retail industry in Dubai. 

pdf/factors-influencing-the-establishment-of-clothing-retailers-51i7x650p0.pdf

Factors Influencing the Establishment of Clothing Retailers in the Metaverse: The Role of Metaverse Technology as a Mediator

Ag/SiO2 and Ag/TiO2 Nanoscale-Thick Layers as Hyperbolic Metamaterials for Transparent Radiative Cooling Glass Design

Textiles play an extremely important role in various aspects of our life since prehistoric times. Toward passionate and imperceptible sport and health, people have begun to explore evolving functions beyond the basic values of textiles. Smart textiles with functions such as communication, sensing, color change, warming, cooling, actuation, and computing have become the new frontier of wearable technology. Global warming and the enormously scorching weather have adversely affected human production and living as well as the sustainable development of society. As being homothermal, the human body has the ability of automatic temperature regulation. However, people are still vulnerable to excessive heat load without the protection of buildings and traditional cooling systems. As the largest organ of the human body, the skin can sense the temperature changes of the external environment and regulate its own temperature. Human skin heat dissipation is a complex process including heat convection, heat evaporation and heat radiation. As the boundary between human skin and the external environment, textiles play an important part for the human body to attain thermal comfort under different environmental conditions. Therefore, personal thermal management, a technology regulating the microenvironments around the human body, can effectively control the heat exchange of the human body, and thus become an eco-friendly solution. With the progress of thermal and materials science, diverse cooling textiles have provided people with convenience and safety in the fields of medicine, firefighting, aerospace, and military technology. In the perspective of cooling principles, personal thermal management solutions based on textiles are categorized as UV-protective textiles, cooling textiles, active cooling suits, and radiative cooling textiles. Some of them have been utilized to maintain a relatively stable body temperature in different scenarios. Textile applications at present are no longer confined to social intercourse and aesthetics, but are more focused on functional breakthroughs. The urgency of global warming and the danger of outdoor work in special occupations have greatly increased the demand for innovations in cooling textiles. It is crucial to maintain thermal comfort of individuals for physical and mental health in extreme environments. Although certain cooling textiles have been commercialized and become basic essentials for specific occasions, stringent challenges remain for weakening the perception of cooling textiles during utilization, expanding their application scenarios to make them available life-essentials. This review focuses on the regulation mechanism and development of various cooling textiles for personal thermal management. We summarize recent research progress and its significance in energy saving and emission reduction. We also propose solutions toward related challenges in the research and development of high-performance protective textiles, and finally give a perspective to the rise of cooling protective textiles. Through multidisciplinary innovations in textile engineering, materials science, optics, thermal science, and mechanics, cooling textiles can be yielded in a low-cost way with multi-functional performance, while maintaining superior wearability and durability compatible with our daily activities. Cooling textiles would enable the construction of more effective, more comprehensive, and more subtle cooling systems for people. In the perspective of intelligent sport and health, the combination of cooling textiles with flexible electronics and digital twins technology can further enable common-looked textiles with intelligence such as autonomous thermal regulation, perception and interaction, thermoelectrical self-powering, short-haul communication, and metaverse.

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面向个人热管理的降温纺织品