Role of Cu and Mn dopants on d0 ferromagnetism of ZnS nanoparticles

Elsi, S. Sahaya; Pushpanathan, K.

doi:10.1007/s10854-019-01422-w

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…As the content of Mn 2+ increased, Mn-containing clusters were generated. This gradually degraded the resolution of the HFS components in the spectrum [ 44 ], which was consistent with the TEM data.…”

Section: Resultssupporting

confidence: 75%

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Khutsishvili

Perfileva

Ножкина

et al. 2021

IJMS

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New promising manganese-containing nanobiocomposites (NCs) based on natural polysaccharides, arabinogalactan (AG), arabinogalactan sulfate (AGS), and κ-carrageenan (κ-CG) were studied to develop novel multi-purpose trophic low-dose organomineral fertilizers. The general toxicological effects of manganese (Mn) on the vegetation of potatoes (Solanum tuberosum L.) was evaluated in this study. The essential physicochemical properties of this trace element in plant tissues, such as its elemental analysis and its spectroscopic parameters in electron paramagnetic resonance (EPR), were determined. Potato plants grown in an NC-containing medium demonstrated better biometric parameters than in the control medium, and no Mn accumulated in plant tissues. In addition, the synthesized NCs demonstrated a pronounced antibacterial effect against the phytopathogenic bacterium Clavibacter sepedonicus (Cms) and were proved to be safe for natural soil microflora.

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Section: Resultssupporting

confidence: 75%

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Khutsishvili

Perfileva

Ножкина

et al. 2021

IJMS

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“…The coercivity, retentivity, and magnetization of CIS NCs were measured to be 357.615 Oe, 2.24 × 10 –5 , and 9.96 × 10 –5 emu/g, respectively. The ferromagnetism at a lower magnetic field is ascribed to the synergetic effect of misplaced bonds and lattice distortion, whereas at a higher magnetic field, Cu ions occupy interstitial sites below the conduction band, resulting in enhanced diamagnetism as reported by Elsi and Pushpanathan Also, the hysteresis curve of CIZS NCs presented weak ferromagnetic properties, as the localized defects align the spins of neighboring ions to facilitate overlapping of magnetic polarons, resulting in weak ferromagnetism . The cation exchange or nanoalloying with ZnS generally results in d 0 ferromagnetism because of the absence of unpaired electrons.…”

Section: Resultsmentioning

confidence: 84%

“…However, an increase in PL QY and PL lifetime in CIZS and CIS-ZMGS NCs is evident via hot-injection of Mn 2+ and Gd 3+ co-doped ZnS and multi-ZnS nanoalloying. The enhanced PL properties in Cu-deficient NCs are obvious because of the existence of a higher Cu luminescence domain and reduced nonradiative energy transfer in the Cu–Cu pairs . Interestingly, the Mn 2+ (0.80 Å) has closer ionic radii as In 3+ (0.81 Å), facilitating partial substitution of Mn in indium sites of CIS NCs, leading to enhanced Mn-doped emission.…”

Section: Resultsmentioning

confidence: 99%

Human Umbilical Cord Wharton’s Jelly-Derived Mesenchymal Stem Cells Labeled with Mn²⁺ and Gd³⁺ Co-Doped CuInS₂–ZnS Nanocrystals for Multimodality Imaging in a Tumor Mice Model

Chetty

Praneetha

Murugan

et al. 2019

ACS Appl. Mater. Interfaces

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Mesenchymal stem cell (MSCs) therapy has recently received profound interest as a targeting platform in cancer theranostics because of inherent tumor-homing abilities. However, the terminal tracking of MSCs engraftment by fluorescent in situ hybridization, immuno-histochemistry, and flow-cytometry techniques to translate into clinics is still challenging because of a dearth of inherent MSCs-specific markers and FDA approval for genetic modifications of MSCs. To address this challenge, a cost-effective noninvasive imaging technology based on multifunctional nanocrystals (NCs) with enhanced detection sensitivity, spatial–temporal resolution, and deep-tissue diagnosis is needed to be developed to track the transplanted stem cells. A hassle-free labeling of human umbilical cord Wharton’s Jelly (WJ)-derived MSCs with Mn2+ and Gd3+ co-doped CuInS2−ZnS (CIS-ZMGS) NCs has been demonstrated in 2 h without requiring an electroporation process or transfection agents. It has been found that WJ-MSCs labeling did not affect their multilineage differentiation (adipocyte, osteocyte, chondrocyte), immuno-phenotypes (CD44+, CD105+, CD90+), protein (β-actin, vimentin, CD73, α-SMCA), and gene expressions. Interestingly, CIS-ZMGS-NCs-labeled WJ-MSCs exhibit near-infrared (NIR) fluorescence with a quantum yield of 84%, radiant intensity of ∼3.999 × 1011 (p/s/cm2/sr)/(μW/cm2), magnetic relaxivity (longitudinal r 1 = 2.26 mM–1 s–1, transverse r 2 = 16.47 mM–1 s–1), and X-ray attenuation (78 HU) potential for early noninvasive multimodality imaging of a subcutaneous melanoma in B16F10-tumor-bearing C57BL/6 mice in 6 h. The ex vivo imaging and inductively coupled plasma mass-spectroscopy analyses of excised organs along with confocal microscopy and immunofluorescence of tumor results also significantly confirmed the positive tropism of CIS-ZMGS-NCs-labeled WJ-MSCs in the tumor environment. Hence, we propose the magnetofluorescent CIS-ZMGS-NCs-labeled WJ-MSCs as a next-generation nanobioprobe of three commonly used imaging modalities for stem cell-assisted anticancer therapy and tracking tissue/organ regenerations.

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“…By analysing Figure 5b in detail, it is possible to notice a dominant ferromagnetic effect [23]. The measured coercivity (Hc), retentivity (Mr), and saturation magnetisation (Ms) of the MWCNT particles at 300 K were 84.81 Oe, 0.13 emu/g, and 1.07 emu/g, respectively.…”

Section: Characterization Of the Magnetic Properties Of Mwcnts And Mw...mentioning

confidence: 93%

Fabrication of Low Electrical Percolation Threshold Multi-Walled Carbon Nanotube Sensors Using Magnetic Patterning

et al. 2023

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Soft robotics is an expanding area with multiple applications; however, building low-cost, soft, and flexible robots requires the development of sensors that can be directly integrated into the soft robotics fabrication process. Thus, the motivation for this work was the design of a low-cost fabrication process of flexible sensors that can detect touch and deformation. The fabrication process proposed uses a flexible polymer nanocomposite with permanent magnets strategically placed where the conductive electrodes should be. The nanocomposite is based on poly(dimethylsiloxane) (PDMS) and multi-walled carbon nanotubes (MWCNTs). The MWCNT contains ferromagnetic impurities remaining from the synthesis process, which can be used for magnetic manipulation. Several electrode geometries were successfully simulated and tested. The magnetic patterning was simulated, allowing the fabrication of conductive patterns within the composite. This fabrication process allowed the reduction of the electrical resistivity of the nanocomposites as compared to the composites with homogeneous MWCNT dispersion. It also allowed the fabrication of piezoresistive and triboelectric sensors at MWCNT concentration as low as 0.5 wt.%. The fabrication process proposed is flexible, allows the development of sensors for soft robotics, as well as monitoring large and unconventional areas, and may be adapted to different mould shapes and polymers at low cost.

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Role of Cu and Mn dopants on d0 ferromagnetism of ZnS nanoparticles

Cited by 6 publications

References 47 publications

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Human Umbilical Cord Wharton’s Jelly-Derived Mesenchymal Stem Cells Labeled with Mn²⁺ and Gd³⁺ Co-Doped CuInS₂–ZnS Nanocrystals for Multimodality Imaging in a Tumor Mice Model

Fabrication of Low Electrical Percolation Threshold Multi-Walled Carbon Nanotube Sensors Using Magnetic Patterning

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Role of Cu and Mn dopants on d0 ferromagnetism of ZnS nanoparticles

Cited by 6 publications

References 47 publications

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Novel Nanobiocomposites Based on Natural Polysaccharides as Universal Trophic Low-Dose Micronutrients

Human Umbilical Cord Wharton’s Jelly-Derived Mesenchymal Stem Cells Labeled with Mn2+ and Gd3+ Co-Doped CuInS2–ZnS Nanocrystals for Multimodality Imaging in a Tumor Mice Model

Fabrication of Low Electrical Percolation Threshold Multi-Walled Carbon Nanotube Sensors Using Magnetic Patterning

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Human Umbilical Cord Wharton’s Jelly-Derived Mesenchymal Stem Cells Labeled with Mn²⁺ and Gd³⁺ Co-Doped CuInS₂–ZnS Nanocrystals for Multimodality Imaging in a Tumor Mice Model