Dr. K. Karthik
In this, I introduce my educational background and my previous and current research interests. Currently, I work as Research Associate at the Bharathidasan University in the field of material science. After graduating from high school, I entered my college at the Vivekananda, Madurai. During my third year, I began a research project in the area of thermal energy applications, where I felt curious about research. I subsequently entered an MSc program and then a PhD program at the Bharathidasan University, Tiruchirappalli, to study nanocomposites applications. In the laboratory, I performed research on “Photocatalytic and Biological Studies of Metal oxide Nanoparticles and Nanocomposites”. As a result of this research I received an award UGC-BSR sponsored Research Fellow in Science for Meritorious Student in the form of JRF for the period March 2013 to March 2015 then SRF for the period March 2015 to 2017. I have published more than 35 research articles in reputed Scopus Indexed Journals. I gain the total citations: 324, h-index: 11, i-10 index: 11 (From Google scholar citations: https://scholar.google.co.in/citations?user=hU-0UQsAAAAJ&hl=en). I have participated/presented in more than 25 international and national conferences. My current research interests are crystal growth, semiconductors nanostructured materials, nanomaterials, biomaterials, thin films, bimetallic and trimetallic nanocomposite materials for energy, environmental and biological applications. In addition to these I received best poster awards at national conference. I am currently engaged as an active reviewer for various reputed Scopus Indexed Journals.
Phone: 8754069890
Phone: 8754069890
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Papers by Dr. K. Karthik
strain (W–H plot) is 0.0029. The surface morphological image appears particle like structure (150 nm). The vibrational stretching mode of Cd–O is 620 cm−1 whereas
micro Raman reveals the overtone at 389 cm−1. The optical energy bandgap is found to be 2.47 eV from the UV–Vis spectra. Five emission peaks were recorded at 360, 429, 488, 527 and 640 nm upon excited at 290 nm. The SHG efficiency is 0.84 times of KDP. The photocatalytic performance has been evaluated of the CdO NPs for the degradation of methylene blue under sunlight irradiation. CdO NPs were screened for their in vitro antibacterial activity against human pathogens such as Gram negative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and Gram positive (Staphylococcus aureus, Enterococcus faecalis, Bacillus subtilis) bacteria has been investigated.
inhibition: E. coli-16 mm) bacteria.
concentration (x=0, 0.1, 0.3%) at 300°C. The obtained nanoparticles were characterized by XRD, SEM with EDAX spectra, UV-Visible, FL and Dielectric properties. XRD pattern exhibit the presence of cupric oxide (CuO) with monoclinic phase. The observed shift in the absorption edge from 204 to 557 nm with (pure CuO) to 1.0 eV (CuO: Fe 1%) and 0.9 eV (CuO: Fe 3%). From the FL spectra the peak absorbed at 823 nm, the band gap is 1.5 eV. The dielectric constant and loss decreases with an increasing frequency at room temperature for pure CuO.
cells. Furthermore, the in vitro cytotoxic effects of the CdO, NiO, and CdO-NiO NCs were examined using the human MCF-7 breast cancer cell line based on 3-[4,5-dimethylthiazol-2-yl]2,5-diphenyltetrazolium bromide assays with normal mouse embryonic fibroblasts (NH3T3) under identical conditions.
as 2.47 eV. The SHG efficiency of CdO is 0.84 times of KDP. The antibacterial activity of CdO against gramnegative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and gram-positive (Staphylococcus aureus, Enterococcus faecalis, Enterococci spp) bacteria has been investigated. This study indicates that the zone of inhibition of 24 mm have high antibacterial activity towards the Gram-positive bacterium Enterococci spp.
hydroxide as starting materials and characterized by XRD, FE-SEM with EDS and FTIR. It exhibits face centred cubic structure with an average crystallite size of 27 nm and the lattice strain (W – H Plot) is 0.0012. The surface morphological image displays microplate like structure with agglomeration. The vibrational stretching mode of Cd-O is 455 cm-1. From the UV- Visible spectra, the optical energy bandgap is estimated as 2.56 eV. The significant antimicrobial activities were studied against gram negative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and gram positive (Staphylococcus aureus, Enterococcus faecalis, Enterococci spp) bacteria. The zone of inhibition is found to be more for gram negative than for gram positive bacteria.
(Ca(OH)2NPs) were formulated through microwave
assisted route and characterized by XRD, FTIR and
FESEM. It exhibits hexagonal crystal structure with an
average crystallite size of 30 nm. The TEM images show
the agglomerated nanoparticles. From the UV–Vis spectra,
the bandgap is estimated as 5.5 eV. A broad emission band
with maximum intensity at around 430 nm is observed in
photoluminescence (PL) spectrum of Ca(OH)2 NPs at room
temperature. The dielectric constant and loss were studied
as a function of frequency at room temperature (Ɛr = 25.0
and Ɛ′′ = 3.94 at 10 kHz).The relative powder second harmonic
generation efficiency (SHG) of Ca(OH)2 NPs is
comparable with the standard KDP. Antibacterial activity
of Ca(OH)2 NPs at concentrations 15 and 30 μg/mL were
screened against gram negative (Escherichia coli, Salmonella
typhi, Pseudomonas aeruginosa, Shigella flexneri,
Proteus vulgaris, Klebsiella pneumoniae and Proteus mirabilis)
and gram positive (Bacillus subtilis, Micrococcus
luteus, and Streptococcus aureus) bacteria by measuring
the inhibition zone.
strain (W–H plot) is 0.0029. The surface morphological image appears particle like structure (150 nm). The vibrational stretching mode of Cd–O is 620 cm−1 whereas
micro Raman reveals the overtone at 389 cm−1. The optical energy bandgap is found to be 2.47 eV from the UV–Vis spectra. Five emission peaks were recorded at 360, 429, 488, 527 and 640 nm upon excited at 290 nm. The SHG efficiency is 0.84 times of KDP. The photocatalytic performance has been evaluated of the CdO NPs for the degradation of methylene blue under sunlight irradiation. CdO NPs were screened for their in vitro antibacterial activity against human pathogens such as Gram negative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and Gram positive (Staphylococcus aureus, Enterococcus faecalis, Bacillus subtilis) bacteria has been investigated.
inhibition: E. coli-16 mm) bacteria.
concentration (x=0, 0.1, 0.3%) at 300°C. The obtained nanoparticles were characterized by XRD, SEM with EDAX spectra, UV-Visible, FL and Dielectric properties. XRD pattern exhibit the presence of cupric oxide (CuO) with monoclinic phase. The observed shift in the absorption edge from 204 to 557 nm with (pure CuO) to 1.0 eV (CuO: Fe 1%) and 0.9 eV (CuO: Fe 3%). From the FL spectra the peak absorbed at 823 nm, the band gap is 1.5 eV. The dielectric constant and loss decreases with an increasing frequency at room temperature for pure CuO.
cells. Furthermore, the in vitro cytotoxic effects of the CdO, NiO, and CdO-NiO NCs were examined using the human MCF-7 breast cancer cell line based on 3-[4,5-dimethylthiazol-2-yl]2,5-diphenyltetrazolium bromide assays with normal mouse embryonic fibroblasts (NH3T3) under identical conditions.
as 2.47 eV. The SHG efficiency of CdO is 0.84 times of KDP. The antibacterial activity of CdO against gramnegative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and gram-positive (Staphylococcus aureus, Enterococcus faecalis, Enterococci spp) bacteria has been investigated. This study indicates that the zone of inhibition of 24 mm have high antibacterial activity towards the Gram-positive bacterium Enterococci spp.
hydroxide as starting materials and characterized by XRD, FE-SEM with EDS and FTIR. It exhibits face centred cubic structure with an average crystallite size of 27 nm and the lattice strain (W – H Plot) is 0.0012. The surface morphological image displays microplate like structure with agglomeration. The vibrational stretching mode of Cd-O is 455 cm-1. From the UV- Visible spectra, the optical energy bandgap is estimated as 2.56 eV. The significant antimicrobial activities were studied against gram negative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and gram positive (Staphylococcus aureus, Enterococcus faecalis, Enterococci spp) bacteria. The zone of inhibition is found to be more for gram negative than for gram positive bacteria.
(Ca(OH)2NPs) were formulated through microwave
assisted route and characterized by XRD, FTIR and
FESEM. It exhibits hexagonal crystal structure with an
average crystallite size of 30 nm. The TEM images show
the agglomerated nanoparticles. From the UV–Vis spectra,
the bandgap is estimated as 5.5 eV. A broad emission band
with maximum intensity at around 430 nm is observed in
photoluminescence (PL) spectrum of Ca(OH)2 NPs at room
temperature. The dielectric constant and loss were studied
as a function of frequency at room temperature (Ɛr = 25.0
and Ɛ′′ = 3.94 at 10 kHz).The relative powder second harmonic
generation efficiency (SHG) of Ca(OH)2 NPs is
comparable with the standard KDP. Antibacterial activity
of Ca(OH)2 NPs at concentrations 15 and 30 μg/mL were
screened against gram negative (Escherichia coli, Salmonella
typhi, Pseudomonas aeruginosa, Shigella flexneri,
Proteus vulgaris, Klebsiella pneumoniae and Proteus mirabilis)
and gram positive (Bacillus subtilis, Micrococcus
luteus, and Streptococcus aureus) bacteria by measuring
the inhibition zone.