Madhushree M. Ravikumar; Vijeth R. Shetty; Suresh G. Shivappa
Abstract
Two organic compounds namely Acridine (ACD) and 9-aminoacridine (ACD-NH2) have been investigated as electrode materials for an aqueous rechargeable lithium-ion battery (ARLIB) applications. The electrochemical investigations reveal that the active species act as anodes in ARLIB systems. In this regard, ...
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Two organic compounds namely Acridine (ACD) and 9-aminoacridine (ACD-NH2) have been investigated as electrode materials for an aqueous rechargeable lithium-ion battery (ARLIB) applications. The electrochemical investigations reveal that the active species act as anodes in ARLIB systems. In this regard, nitrogen group act as redox center and undergo electrochemical reaction with Li-ions during charge and discharge process. The synthesis of 9-amonoacridine is done by standard method called chichibabin reaction. Amination of ACD enhances the electrochemical behaviour of the molecule. To improve the electrochemical performances of ACD & ACD-NH2, graphene is used as an additive for ARLIB system. The decorated molecules such as decorated Acridine (dACD) and decorated 9-aminoacridine (dACD-NH2) showed improved electrochemical performance as compared with ACD & ACD-NH2. The decoration is of great importance concerning capacity, reversibility and stability of cycling behavior during charge and discharge processes. Charge/discharge tests show that ACD, ACD-NH2, dACD, and dACD-NH2 have achieved initial discharge capacities of 119, 122, 149 and 220 mAh g -1 respectively at a current density of 0.2 mA. The good cyclic performance and agreeable discharge capacity of the cell signifies the application of dACD-NH2 as anode material for ARLIB system. Copyright © VBRI Press.
Ganeshlenin Kandasamy; Atul Sudame; Dipak Maity
Abstract
In recent times, superparamagnetic iron oxide nanoparticles (SPIONs) are widely used as heating agents in magnetic hyperthermia therapy (MHT) to kill malignant cells in cancer treatments, which is mainly due to their excellent magnetic properties and biocompatibility. However, it is still a challenge ...
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In recent times, superparamagnetic iron oxide nanoparticles (SPIONs) are widely used as heating agents in magnetic hyperthermia therapy (MHT) to kill malignant cells in cancer treatments, which is mainly due to their excellent magnetic properties and biocompatibility. However, it is still a challenge to coat SPIONs with suitable surfactants and to apply an appropriate alternative magnetic field (AMF) at specific frequency to achieve enhanced heating effects in MHT. In this work, the as-synthesized novel short-chain surfactants (i.e., amino-terephthalic acid (ATA) and terephthalic acid (TA)) coated hydrophilic SPIONs are synthesized and subsequently involved in calorimetric hyperthermia studies to investigate their intrinsic heating capability by varying (i) their concentrations from 1 - 8 mgFe/ml and (ii) AMFs at different frequencies (263.2 – 752.39 kHz) while achieving the temperature above 42 °C – therapeutic hyperthermia temperature. It is found that the heating rate of TA-SPIONs is faster as compared to ATA-SPIONs on exposure to the AMF. However, the highest specific absorption rate (SAR) value of 129.80 W/gFe is attained for ATA-SPIONs with 2 mgFe/ml concentration on exposure to AMF at 752.39 kHz. Thus, ATA/TA coated SPIONs are very promising agents for magnetic hyperthermia and could be further investigated in in vitro/in vivo cancer treatments.
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