MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202541134186 A) filed by Rajalakshmi Engineering College, Chennai, Tamil Nadu, on Dec. 31, 2025, for 'flower-like neodymium-doped lafeo3 with ppt acetone sensitivity and the manufacturing method thereof.'
Inventor(s) include Dr. K. L. Vincent Joseph; and Dr. N. T. Mary Rosana.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "A bio-assisted method for the synthesis of flower-like neodymium-doped lanthanum ferrite 5 (Nd-doped LaFeOJ) and its application in ultra-trace acetone sensing is disclosed. The synthesis involves homogeneous mixing of neodymium(III) nitrate hexahydrate (1.052 kg), lanthanum(III) nitrate hexahydrate (1.04 kg), and iron(III) nitrate (0.91 kg) with betel nut seed powder (1.32 kg), 650 mL of 1.5 M potassium hydroxide solution, and 0.75 kg of urea, followed by controlled heating to obtain a spongy precursor. The precursor is calcined at 890 10 oc for 12 h to yield flower-like Nd-doped LaFeOJ. An acetone sensing device is fabricated by coating 15 mg of the synthesized material onto a ceramic tubular substrate (OD 3 mm x ID 2 mm x L 7 mm) equipped with gold electrodes, a nickel-chromium heating coil, and platinum electrical contacts. The sensor operates at a bias voltage of 5 V and a working temperature of 114 C with a power consumption of 1.8 W. The fabricated device demonstrates high 15 sensitivity, enabling detection of acetone vapour concentrations as low as 10 parts per trillion, indicating its potential for ultra-low-level volatile organic compound sensing applications."
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