Abstract
Nano-polycrystalline samples of cadmium sulphide doped with 0, 2, 4, 6, 8 and 10 atomic % of Mn were prepared by a template based chemical route. The presence of thiophenol as template on the surface of the samples has been detected with FTIR technique. Particle sizes of 15-50 nm range, hexagonal structure and polycrystalline nature of the samples have been identified through SEM and TEM techniques. Surface states in the band gap region of the samples confirmed by PL study also revealed that the size of the particles is in the nano range. The low temperature magnetization study suggested the 10 at.% Mn doped sample might be in a re-entrant-spin glass phase at 77 K. Copyright © 2013 VBRI press.
Highlights
The past few years have witnessed an exponential growth in the potential use of Diluted Magnetic Semiconducting (DMS) nanoparticles in diverse fields like material science, high density recording media, spin valves, magnetic resonance imaging, ferro fluid technology, magneto caloric refrigeration, environmental areas etc [1]
A novel saccharides detection assay based on covalent immobilization of amino phenyl boronic acid (APBA) in thin films of carboxyl functionalized chitosan containing Gd2O3:Eu3+ nanoparticles (5nm) at a platinum disc electrode has been developed by Tiwari et al [8]
Cadmium acetate (99+%, Aldrich Chemical Co), manganese acetate (99.1%, Fisher Scientific) and Na2S.9H2O (98%, Aldrich Chemical Co) as precursors, methanol (CH3OH) as a solvent, thiophenol (C6H5SH) as a template and double distilled water obtained from commercial source( analytical reagent,AR grade) were used for the chemical co-precipitation synthesis of CdS: Mn nanocomposite system
Summary
The past few years have witnessed an exponential growth in the potential use of Diluted Magnetic Semiconducting (DMS) nanoparticles in diverse fields like material science, high density recording media, spin valves, magnetic resonance imaging, ferro fluid technology, magneto caloric refrigeration, environmental areas etc [1]. The researchers are highly interested in preparing multifunctional magnetic nanoparticles for biomedical applications such as target drug delivery, magnetic resonance imaging and magnetic hyperthermia treatment [2]. It was reported that CdS doped with different transition metals could efficiently work as multifunctional nanoparticles. Magnetic properties were experimentally studied in some antiferromagnetic nanoparticles [10]. In this context, DMS nanoparticles are interesting materials due to their advantageous electronic and magnetic properties which are being widely studied for a better understanding on some fundamentally interesting issues related to their optical and magnetic properties of such wide band gap semiconducting materials [11]. Though extensive work reported on DMS, not much of work at the nano level of CdS:Mn on the application to these properties has been attempted and our interest in this subject. Structure, morphology, photoluminescence and magnetic nature of the samples were carried out and interpreted
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