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  • 1.
    Dhumal, Jyoti
    et al.
    Department of Electronics, DBF Dayanand College of Arts and Science, Solapur, MS, India.
    Bandgar, S. S.
    Department of Electronics, DBF Dayanand College of Arts and Science, Solapur, MS, India.
    Phadatare, Manisha R.
    Department of Medical Physics, Center for Interdisciplinary Research, D. Y. Patil University, Kolhapur, MS, India.
    Shahane, G. S.
    Department of Electronics, DBF Dayanand College of Arts and Science, Solapur, MS, India.
    Citrate capped Fe0.7Mn0.3Fe2O4 ferrite nanoparticles for hyperthermia2018In: AIP Conference Proceedings / [ed] L.P. Deshmukh, Niti Nipun Sharma, Ford L. Gaol och Jamil Akhtar, American Institute of Physics (AIP), 2018, Vol. 1989Conference paper (Refereed)
    Abstract [en]

    Structural, magnetic properties and alternating current (AC) magnetic heating characteristics of Fe0.7Mn0.3Fe2O4 nanoparticles have been investigated with respect to the possible application for magnetic hyperthermia. The specific absorption rate (SAR) was measured in alternating magnetic fields of 84.44–251.4Oe at fixed frequency of 289 kHz. Fe-Mn NPs were fabricated by the chemical co-precipitation method using sodium hydroxide as the precipitating agent and citric acid as capping agent. The morphology of the particles was analyzed by transmission electron microscopy (TEM). The TEM reveals that the grains are nearly spherical in shape with average particles size of 10nm. X-ray diffraction pattern indicated the sole existence of cubic spinel phase of Fe-Mn NPs with lattice parameter a=8.3419 Å. Formation of the spinel Fe-Mn ferrite was also supported by Fourier Transform Infrared Spectroscopy. The saturation magnetization (Ms) is 40emu/g with superparamagnetic nature of the sample. The magnetic heating ability of NPs was studied with an induction heating system. A highest SAR value of 78.85W/g for 2mg/mL sample concentration (289 kHz, 335.2Oe) was observed.

  • 2.
    Koli, Rohit R.
    et al.
    Shivaji Univ, Kolhapur, Maharashtra, India; Shivaji Univ, Kolhapur, Maharashtra, India.
    Phadatare, Manisha R.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. DY Patil Univ, Kolhapur, Maharashtra, India.
    Sinha, Bhavesh B.
    Univ Mumbai, Mumbai, Maharashtra, India.
    Sakate, Deepak M.
    Shivaji Univ, Kolhapur, Maharashtra, India.
    Ghule, Anil V.
    Shivaji Univ, Kolhapur, Maharashtra, India.
    Ghodake, Gajanan S.
    Dongguk Univ Seoul, Goyang Si, Gyeonggi Do, India.
    Deshpande, Nishad G.
    Shivaji Univ, Dept Phys, Kolhapur, Maharashtra, India.
    Fulari, Vijay J.
    Shivaji Univ, Kolhapur, Maharashtra, India.
    Gram bean extract-mediated synthesis of Fe3O4 nanoparticles for tuning the magneto-structural properties that influence the hyperthermia performance2019In: Journal of the Taiwan Institute of Chemical Engineers / Elsevier, ISSN 1876-1070, E-ISSN 1876-1089, Vol. 95, p. 357-368Article in journal (Refereed)
    Abstract [en]

    A green synthesis of biocompatible magnetite (Fe3O4) nanoparticles (MNPs) using a combination of urea (U) and gram-bean extract (GBE, Cicer arietinum L.) is reported. The particle size of similar to 13 nm and highly stable magnetite phase is observed for GBE-U mediated MNPs. On the other hand, the MNPs synthesized using either U or GBE shows larger particle size and uneven size distribution. Interestingly, the sample with particle size similar to 13 nm shows optimum heat generation capacity (measured in specific absorption rate, i.e., SAR) near to the therapeutic temperature (43 degrees C) with least-variance. To investigate the influence of various factors such as variation in MNPs weight concentration (W-t), applied alternating magnetic field (AMF), saturation magnetization (M-s), magnetization rate (R-m), etc. on SAR, a multiple linear regression model (MLRM) is used. The study reveals a positive correlation of SAR with R-m, and AMF values while the negative correlation with M-s and W-t. Ultimately, the present green synthesis is the affordable approach for preparing stable and tiny MNPs. Moreover, MLRM is found to be a useful theoretical tool for understanding the influence of MNPs on hyperthermia performance. 

  • 3.
    Meshram, Jagruti
    et al.
    Centre for Interdisciplinary Research, D. Y. Patil University, Kolhapur-416006, Maharashtra, India.
    Koli, V B
    Centre for Interdisciplinary Research, D. Y. Patil University, Kolhapur-416006, Maharashtra, India.
    Borde, L C
    Tata Institute of Fundamental Research, Dr Homi Bhabha Road, Colaba, Mumbai 400 004, India.
    Phadatare, Manisha R.
    Centre for Interdisciplinary Research, D. Y. Patil University, Kolhapur-416006, Maharashtra, India.
    Pawar, S H
    Centre for Interdisciplinary Research, D. Y. Patil University, Kolhapur-416006, Maharashtra, India; Centre for Research and Technology Development, Sinhgad Institutes, Solapur-413225, Maharashtra, India.
    Structural, spectroscopic and anti-microbial inspection of PEG capped ZnO nanoparticles for biomedical applications2018In: Materials Research Express, ISSN 2053-1591, Vol. 5, no 4Article in journal (Refereed)
    Abstract [en]

    Zinc oxide (ZnO) nanoparticles (NPs) have a wide range of biomedical applications. Present study demonstrates the new methodology in sol-gel technology for synthesizing Polyethylene glycol (PEG) capped ZnO NPs and its size effect on anti-microbial activity. The reaction time was increased from 1 h to 5 h for the synthesis of ZnO NPs at 130 °C. The size of PEG capped ZnO NPs is increased from 10 to 84 nm by increasing the reaction upto 5 h. The x-ray diffraction studies and transmission electron microscopy analysis reveals the phase purity and hexagonal wurtzite crystal structure with uniform PEG capping on the surface of ZnO NPs. UV–visible spectroscopy exhibits the peak at 366 nm which is attributed to ZnO NPs. No adverse effect is observed in case of absorbance spectroscopy. Further, Fourier transforms infrared spectroscopy and thermo gravimetric analysis depicts the adsorption of PEG molecules on the ZnO NPs surface. The anti-microbial activities for both Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria were studied by optical density (OD) mesurement. The remarkable anti-microbial activity was observed for PEG capped ZnO NPs synthesized at 1 h reaction time showing higher activity in comparison with that synthesized from 2 h to 5 h reaction time. The microbial growth was found to be inhibited after 10 h OD measurement for both the bacteria. The anti-microbial activity may be attributed to the generation of ROS and H2O2. However, these generated species plays a vital role in inhibition of microbial growth. Hence, PEG capped ZnO NPs has promising biomedical applications.

  • 4.
    Phadatare, Manisha R.
    et al.
    Center for Interdisciplinary Research, D. Y. Patil University, Maharashtra, India.
    Meshram, J V
    Center for Interdisciplinary Research, D. Y. Patil University, Maharashtra, India.
    Gurav, K V
    Devchand Coll, Dept Phys, Arjunnagar, MS, India. Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, South Korea.
    Kim, Jin Hyeok
    Chonnam Natl Univ, Dept Mat Sci & Engn, Optoelect Convergence Res Ctr, South Korea.
    Pawar, S H
    Center for Interdisciplinary Research, D. Y. Patil University, Maharashtra, India.
    Enhancement of specific absorption rate by exchange coupling of the core–shell structure of magnetic nanoparticles for magnetic hyperthermia2016In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 49, no 9, article id 095004Article in journal (Refereed)
    Abstract [en]

    Conversion of electromagnetic energy into heat by nanoparticles (NPs) has the potential to be a powerful, non-invasive technique for biomedical applications such as magnetic fluid hyperthermia, drug release, disease treatment and remote control of single cell functions, but poor conversion efficiencies have hindered practical applications so far. In this paper, an attempt has been made to increase the efficiency of magnetic thermal induction by NPs. To increase the efficiency of magnetic thermal induction by NPs, one can take advantage of the exchange coupling between a magnetically hard core and magnetically soft shell to tune the magnetic properties of the NP and maximize the specific absorption rate, which is the gauge of conversion efficiency. In order to examine the tunability of magnetocrystalline anisotropy and its magnetic heating power, a representative magnetically hard material (CoFe2O4) has been coupled to a soft material (Ni0.5Zn0.5Fe2O4). The synthesized NPs show specific absorption rates that are of an order of magnitude larger than the conventional one.

  • 5.
    Phadatare, Manisha R.
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Deemed Univ, Maharashtra, India.
    Patil, Rohan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Blomquist, Nicklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Forsberg, Sven
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hummelgård, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Meshram, Jagruti
    Deemed Univ, Maharashtra, India.
    Hernández, Guiomar
    Uppsala Univ, Uppsala.
    Brandell, Daniel
    Uppsala Univ, Uppsala.
    Leifer, Klaus
    Uppsala Univ, Uppsala.
    Sathyanath, Sharath Kumar Manjeshwar
    Uppsala Univ, Uppsala.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Silicon-Nanographite Aerogel-Based Anodes for High Performance Lithium Ion Batteries2019In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 14621Article in journal (Refereed)
    Abstract [en]

    To increase the energy storage density of lithium-ion batteries, silicon anodes have been explored due to their high capacity. One of the main challenges for silicon anodes are large volume variations during the lithiation processes. Recently, several high-performance schemes have been demonstrated with increased life cycles utilizing nanomaterials such as nanoparticles, nanowires, and thin films. However, a method that allows the large-scale production of silicon anodes remains to be demonstrated. Herein, we address this question by suggesting new scalable nanomaterial-based anodes. Si nanoparticles were grown on nanographite flakes by aerogel fabrication route from Si powder and nanographite mixture using polyvinyl alcohol (PVA). This silicon-nanographite aerogel electrode has stable specific capacity even at high current rates and exhibit good cyclic stability. The specific capacity is 455 mAh g−1 for 200th cycles with a coulombic efficiency of 97% at a current density 100 mA g−1.

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  • 6.
    Rastabi, Shahrzad Arshadi
    et al.
    Tarbiat Modares University, Tehran, Iran.
    Mamoory, Rasoul Sarraf
    Tarbiat Modares University, Tehran, Iran.
    Blomquist, Nicklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Phadatare, Manisha R.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Synthesis of a NiMoO4/3D-rGO nanocomposite via starch medium precipitation method for supercapacitor performance2020In: Batteries, ISSN 2313-0105, Vol. 6, no 1, article id 5Article in journal (Refereed)
    Abstract [en]

    This paper presents research on the synergistic effects of nickel molybdate and reduced graphene oxide as a nanocomposite for further development of energy storage systems. An enhancement in the electrochemical performance of supercapacitor electrodes occurs by synthesizing highly porous structures and achieving more surface area. In this work, a chemical precipitation technique was used to synthesize the NiMoO4/3D-rGO nanocomposite in a starch media. Starch was used to develop the porosities of the nanostructure. A temperature of 350◦C was applied to transform graphene oxide sheets to reduced graphene oxide and remove the starch to obtain the NiMoO4/3D-rGO nanocomposite with porous structure. The X-ray diffraction pattern of the NiMoO4 nano particles indicated a monoclinic structure. Also, the scanning electron microscope observation showed that the NiMoO4 NPs were dispersed across the rGO sheets. The electrochemical results of the NiMoO4/3D-rGO electrode revealed that the incorporation of rGO sheets with NiMoO4 NPs increased the capacity of the nanocomposite. Therefore, a significant increase in the specific capacity of the electrode was observed with the NiMoO4/3D-rGO nanocomposite (450 Cg−1 or 900 Fg−1) when compared with bare NiMoO4 nanoparticles (350 Cg−1 or 700 Fg−1) at the current density of 1 A g−1. Our findings show that the incorporation of rGO and NiMoO4 NP redox reactions with a porous structure can benefit the future development of supercapacitors. 

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  • 7.
    Rastabi, Shahrzad Arshadi
    et al.
    Tarbiat Modares Univ, Tehran, Iran.
    Mamoory, Rasoul Sarraf
    Tarbiat Modares Univ, Tehran, Iran.
    Dabir, Fatemeh
    Niroo Res Inst, Tehran, Iran.
    Blomquist, Nicklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Phadatare, Manisha R.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Synthesis of NiMoO4/3D-rGO Nanocomposite in Alkaline Environments for Supercapacitor Electrodes2019In: Crystals, ISSN 2073-4352, Vol. 9, no 1, article id 31Article in journal (Refereed)
    Abstract [en]

    Although Graphene oxide (GO)-based materials is known as a favorable candidate for supercapacitors, its conductivity needs to be increased. Therefore, this study aimed to investigate the performance of GO-based supercapicitor with new methods. In this work, an ammonia solution has been used to remove the oxygen functional groups of GO. In addition, a facile precipitation method was performed to synthesis a NiMoO4/3D-rGO electrode with purpose of using synergistic effects of rGO conductivity properties as well as NiMoO4 pseudocapacitive behavior. The phase structure, chemical bands and morphology of the synthesized powders were investigated by X-ray diffraction (XRD), Raman spectroscopy, and field emission secondary electron microscopy (FE-SEM). The electrochemical results showed that the NiMoO4/3D-rGO(II) electrode, where ammonia has been used during the synthesis, has a capacitive performance of 932 Fg(-1). This is higher capacitance than NiMoO4/3D-rGO(I) without using ammonia. Furthermore, the NiMoO4/3D-rGO(II) electrode exhibited a power density of up to 17.5 kW kg(-1) and an energy density of 32.36 Wh kg(-1). These results showed that ammonia addition has increased the conductivity of rGO sheets, and thus it can be suggested as a new technique to improve the capacitance.

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