서울대학교 · 공학
Saurabh Pathak 교수의 연구실은 나노자기유체, 자기 나노입자 및 나노복합재료를 중심으로 한 고성능 센서 및 열관리 시스템 개발에 주력하고 있습니다. 특히 고정밀 온도 측정을 위한 나노자기유체 베어링 기반 센서, 생체영상 진단에 적합한 광활성 망간 도핑 코발트 페라이트 나노입자, 그리고 전자기기의 열관리를 위한 나노자기유체 냉각 시스템에 대한 연구를 진행하고 있습니다. 나노입자의 표면 기능화, 안정성 향상, 그리고 마이크로파 스핀 공명을 통한 자기적 특성 분석을 통해 기초 물성과 응용 기술을 동시에 탐구하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
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.
