Seoul National University · Engineering
Professor Saurabh Pathak's research lab specializes in the design, synthesis, and application of magnetic nanomaterials for advanced technological and biomedical applications. The lab focuses on developing stable magnetic fluids, magnetic nanoparticles, and nanocomposites with tailored magnetic, optical, and thermal properties for use in high-precision sensing, bio-imaging, targeted drug delivery, and thermal management in electronics. Key research directions include the development of nanomagnetic fluid-based sensors, microwave spin resonance characterization, and the investigation of antibacterial mechanisms of magnetic nanoparticles.
Figures are computed from collected data and may differ slightly.
We have developed a high precision (3.7 mK) temperature sensor using nanomagnetic fluid bearing. The device is based on the basic principle of Charles law (v ∝ T). For this, we have prepared kerosene-based magnetic fluid for ferrofluid bearing formation with permanent magnet. The ferrofluid bearing has very low coefficient of friction (μ f = 0.002), and provides a frictionless movement and perfect sealing. The device is highly sensitive as it uses air as a working media whose coefficient of volu
In this work, we report the synthesis and detailed characterization of single-domain, optically active, manganese-substituted cobalt ferrite (CoFe 2 O 4 ) magnetic nanoparticles without any surface functionalization as prospective fluorescent probes for bio-imaging.
Microwave spin resonance behavior of the Fe<sub>3</sub>O<sub>4</sub> surface decorated ZnO nanocomposites (FZNC) has been investigated by ferromagnetic resonance (FMR). Modified hydrothermal method has been adopted to fabricate FZNC samples with Fe<sub>3</sub>O<sub>4</sub> nanoparticles chains were used as seeds in the uniform magnetic field to decorate them on the surface of the ZnO nanoparticles in a unique configuration. Spin dynamics investigation confirms the transition of ZnO from diamagne
The present work reports the synthesis of a stable aqueous magnetic fluid (AMF) by dispersing double-surfactant-coated Fe<sub>3</sub>O<sub>4</sub> magnetic nanoparticles (MNPs) in water using a facile ambient scalable wet chemical route. MNPs do not disperse well in water, resulting in low stability. This was improved by dispersing double-surfactant (oleic acid and sodium oleate)-coated MNPs in water, where cross-linking between the surfactants improves the stability of the AMFs. The stability w
The effective thermal management of electronic system holds the key to maximize their performance. The recent miniaturization trends require a cooling system with high heat flux capacity, localized cooling, and active control. Nanomagnetic fluids (NMFs) based cooling systems have the ability to meet the current demand of the cooling system for the miniaturized electronic system. However, the thermal characteristics of NMFs have a long way to go before the internal mechanisms are well understood.
Illustration of nanoparticles exerting antibacterial actin by disrupting bacterial membranes, generating ROS, inducing mitochondrial dysfunction and causing DNA and protein damage, ultimately leading to bacterial cell death.
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