MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202641122355 A) filed by Psg College Of Technology on October 13, 2026, for A Process For Atmospheric Direct Injection Flame Synthesis Of Metal Oxide Nanostructures From Solid Metallic Microparticals.
Inventors include Dr. P. Kathirvel; and Dr. K. Karthick.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: ANNEXURE 4 ABSTRACT OF THE INVENTION 5 "A PROCESS FOR ATMOSPHERIC DIRECT INJECTION FLAME SYNTHESIS OF METAL OXIDE NANOSTRUCTURES FROM SOLID METALLIC MICROPARTICLES" 10 The present invention relates to a process for atmospheric direct injection flame synthesis of metal oxide nanostructures from solid metallic microparticles. As illustrated in Fig. 1, the process comprises providing metallic microparticles as feedstock [100], continuously delivering the microparticles by passive gravity-assisted feeding [101], and introducing them in a controlled manner into the flame core [102]. The metallic microparticles undergo 15 heating, melting and vaporization [103], followed by oxidation and nucleation [104] and crystal growth to form metal oxide nanostructures [105]. The synthesized nanostructures subsequently undergo natural atmospheric quenching upon exiting the high-temperature flame region [106] and are collected on a suitable substrate [107]. The disclosed process eliminates the requirement for chemical precursor solutions, 20 solvents, catalysts, carrier gases, vacuum systems, electrically actuated powder feeders and post-synthesis thermal treatment, thereby simplifying the synthesis process and reducing system complexity. In preferred embodiments, zinc and tin microparticles are employed as feedstocks for the synthesis of zinc oxide (ZnO) and tin oxide (Sn02) nanostructures, respectively. The process preferentially produces predominantly zinc 25 oxide nanotetrapods together with needle-like and branched nanostructures exhibiting reduced agglomeration when zinc is employed as the metallic feedstock, while substantially spherical tin oxide nanoparticles are obtained when tin is employed. The invention provides a simple, scalable and atmospheric route for the production of metal oxide nanostructures suitable for applications including photodetectors, gas sensors, 30 photocatalysis, optoelectronic devices, transparent electronics and energy harvesting. Figure 1 shows flowchart illustr
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