Gold Nanocages  (AuNCs) are made up with a ultra-thin and porous walls of Au or Au-based alloys. It is the class of hollow, porous gold nanoparticles ranging in the size from 10 to over 150 nm. Generally, AuNCs are created by reacting silver nanoparticles with chloroauric acid (HAuCl 4 ) in boiling water. When AuNCs are irradiated with light, it exhibit a high efficiency for light-to-heat conversion and a large absorption cross section, making them effective photothermal transducers. Tuned AuNCs significantly absorb visible and near-infrared regions to optimize their interaction with the light at different wavelengths. AuNCs exhibits better photo-stability compared to the conventional organic dyes. These perspectives are of AuNCs synthesis and their use in applications involving photothermal conversion. Figure 1. Structure of NanoRod, NanoShell, NanoCage and AuNCs.  Recently, Qiu et al ., have reviewed the synthetic methods of AuNCs and their photothermal ...

Prof. Ruquan Ye, from city University of Hong Kong and his collaboration with Prof. Chunlei Zhu, Ben Zhong Tang, and their research team have developed photo-thermally laser-induced graphene as a wearable mask with superior antibacterial capacity. Face masks have become a life-sustaining role in fighting against the outbreak of diseases like EBOLA and COVID-19. However, improper usage and disposal of masks may lead to secondary transmission around the globe. The vital role of the mask is a primary source to prevent us from COVID-19. In this pandemic situation, we must be alert about the used mask materials. The materials should safeguard us from COVID-19 as well as it must be bio-degradable material to safeguard around the world.       The masks, currently available in the market are of single-use with/without filtering layers of thermoplastic materials like polypropylene. The degradation of these used...