Structural, morphological, opto-luminescence and magnetic behavioral variations of Co–ZnS hybrid nanoparticles N. Manivannan, B. Chandar Shekar, C. K. Senthil Kumaran, S. Sugapriya Indian Journal of Physics, 2020 Co-doped ZnS hybrid nanoparticles were synthesized by chemical precipitation method. XRD peaks were shifted toward higher angle with increasing dopant concentration, which were corresponding to the structural changes in the presence of Co. Chemical compositions of the prepared materials were confirmed by EDAX. High-resolution transmission electron micrographs (HRTEM) revealed finger print appearance and are corresponding to miller indices of ZnS, confirming the quantum size of the prepared nanoparticles. The particle size was found to vary from 2 to 4 nm. The results of the selected area electron diffraction (SAED) are in agreement with the XRD results. The peaks observed between 616 and 1103 cm −1 are ascribed to cobalt and sulfur bond. The higher band gap energy obtained for the prepared nanoparticles as compared to bulk ZnS from the DRS spectra revealed quantum confinement. The intensity of the photoluminescence (PL) was found to increase with the decrease in crystallite size. The observe increase of the PL intensity is due to quantum size effect. The magnetization (M–H curve) measured at room temperature exhibited saturated hysteresis loop for higher Co concentration indicating the ferromagnetic nature of the prepared nanoparticles.
Effect of thermal growth on strutural and optical properties International Journal of Chemtech Research, 2015
Effect on annealing temperature on Zno nanoparticles International Journal of Chemtech Research, 2015
Effect of annealing on TiO2 nanoparticles S. Sugapriya, R. Sriram, S. Lakshmi Optik, 2013 TiO 2 nanoparticles have been prepared by simple chemical precipitation method and annealed at different temperatures. The as-prepared TiO 2 are amorphous, and they transform into anatase phase on annealing at 450 °C, and rutile phase on annealing at 900 °C. The X-ray diffraction results showed that TiO 2 nanoparticles with grain size in the range of 21–24 nm for anatase phase and 69–74 nm for rutile phase have been obtained. FESEM images show the formation of TiO 2 nanoparticles with small size in structure. The FTIR and Raman spectra exhibited peaks corresponding to the anatase and rutile structure phases of TiO 2 . Optical absorption studies reveal that the absorption edge shifts towards longer wavelength (red shift) with increase of annealing temperature.
Erratum: Change of phase by annealing on TiO2 nanoparticles (Russian Journal of Applied Chemistry (2013) 86:6 (811-816)) Sugapriya Subbaiyan, Sriram Rangarajalu, Lakshmi Sriram Russian Journal of Applied Chemistry, 2013 In the abstract it should be: “TiO2 nanoparticles have been prepared by simple chemical precipitation method and annealed at different temperatures. The prepared TiO2 were amorphous, and they were transformed into anatase phase on annealing at 450°C, and rutile phase on annealing at 900°C. The X-ray diffraction results showed that TiO2 nanoparticles with grain size in the range of 21 to 24 nm for anatase phase and 69 to 74 nm for rutile phase were obtained. FESEM images show the formation of TiO2 nanoparticles with small size in structure. The FTIR and Raman spectra exhibited peaks corresponding to the anatase and rutile structure phases of TiO2. Optical absorption studies reveal that the absorption edge shifts towards longer wavelength (red shift) with increase of annealing temperature.”
Change of phase by annealing on TiO2 nanoparticles Sugapriya Subbaiyan, Sriram Rangarajalu, Lakshmi Sriram Russian Journal of Applied Chemistry, 2013 The decomposition of silver selenide and sulfide to metallic silver and chalcogen containing oxygen compounds by sintering with an equimolar mixture of sodium nitrate and nitrite was examined. It was found that 100% recovery of silver in a metal phase is reached at 5% excess of sodium nitrate and nitrite and a time of the isothermal exposure at 375 °C for 1 hour or 0.5 hours at 400°C.
Synthesis and characterization of silver nanowires Subbaiyan Sugapriya, Rangarajalu Sriram, Sriram Lakshmi Advanced Materials Research, 2013 Silver nanowires have been synthesized by polyol process with ethylene glycol as solvent and PVP as capping agent. The silver nanowires have been characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), and Transmission electron microscope (TEM) techniques. The prepared silver nanowires were found to exhibit face-centered cubic (fcc) structure. The diameter of the prepared silver nanowires have been found to lie in the range of 60 - 80 nm and the length of the wires have been observed to be in the range of 10-20 µm. The I-V characteristics have been carried out to study the conducting behavior of the prepared silver nanowires.
Structural and electrical conductivity of zno nano bi-pyramids-like structure Subbaiyan Sugapriya, Rangarajalu Sriram, Sriram Lakshmi Lecture Notes in Mechanical Engineering, 2012 In this paper, we report the structural and electrical properties of ZnO nano bi-pyramid-like structure synthesized by a one-step process of hydrothermal redox route. X-ray diffraction (XRD) result shows that the prepared ZnO exhibits hexagonal phase and no secondary phase was observed. The crystallite size has been calculated by Scherrer’s equation and was found to be in the range 30–50 nm. SEM images reveal that ZnO nano bi-pyramid-like structure has been formed which has a length of ~4.5 μm and base of ~4 μm. The I–V characteristics have been carried out to study the electrical behavior of the prepared ZnO nano bi-pyramid-like structure.
RECENT SCHOLAR PUBLICATIONS
Structural, morphological, opto-luminescence and magnetic behavioral variations of Co-ZnS hybrid nanoparticles S Manivannan, Chandra Shekar, SENTHILKUMARAN Indian Journal of Physics 94, 919 - 925 , 2020 2020.0 Citations: 7
ZnO Needle-like structures: Synthesis and characterization S Sugapriya, S Lakshmi, B Chandarshekar, R Ranjithkumar Kongunadu Research Journal 2 (2), 13-15 , 2015 2015.0 Citations: 7
Effect of Theermal growth on structural and Optical properties SKCK 9. Sugapriya S, Lakshmi .S International Journal of Chem Tech Research 8 (6), 303-308 , 2015 2015.0
Effect on Annealing Temperature on ZnO nanoparticles SKCK Sugapriya S, Lakshmi .S International Journal of Chem Tech Research 8 (6), 297-302 , 2015 2015.0 Citations: 8
Influence of dietary selenium nanowires on growth performance of broiler chicken CK Senthil Kumaran, S Sugapriya, V Dhayalan, R Ranjithkumar, ... Int. J. Biosci. Nanosci 2, 78-83 , 2015 2015.0 Citations: 5
Effect on the growth performance of broiler chickens by selenium nanoparticles supplementation CK Senthil Kumaran, S Sugapriya, N Manivannan, B Chandar Shekar Nano Vision 5 (4-6), 161-168 , 2015 2015.0 Citations: 28
Phase change on TiO2 nanoparticles by annealing S Sugapriya, S Lakshmi, CK Senthil Kumaran, N Manivannan, ... UGC-SERO Sponsored Second National Conference on Thin Film Science & Nano … , 2015 2015.0 Citations: 1
Influence of Dietary Selenium Nanowires on Growth Performance of Broiler Chicken RRCB 6. Senthil Kumaran C K, Sugapriya S, Dhayalan Velauthapillai International Journal of Biosciences and Nanosciences 2 (4), 78-83 , 2015 2015.0 Citations: 7
Effect of annealing on TiO2 nanoparticles S Sugapriya, R Sriram, S Lakshmi Optik 124 (21), 4971-4975 , 2013 2013.0 Citations: 112
Erratum to: “Change of phase by annealing on TiO 2 nanoparticles” S Subbaiyan, S Rangarajalu, L Sriram Russian Journal of Applied Chemistry 86 (9), 1463-1463 , 2013 2013.0
Change of phase by annealing on TiO 2 nanoparticles S Subbaiyan, S Rangarajalu, L Sriram Russian Journal of Applied Chemistry 86 (6), 811-816 , 2013 2013.0 Citations: 1
Synthesis and Characterization of Silver Nanowires S Sugapriya, R Sriram, S Lakshmi Advanced Materials Research 678, 212-216 , 2013 2013.0
Structural and Electrical Conductivity of ZnO Nano Bi-pyramids-like Structure S Sugapriya, R Sriram, S Lakshmi Emerging Trends in Science, Engineering and Technology: Proceedings of … , 2012 2012.0
Structural and Electrical Properties of ZnO Flower-like structures S Sugapriya, S Lakshmi, CK Senthil Kumaran, N Manivannan, ... UGC-SERO Sponsored Second National Conference on Thin Film Science & Nano … , 0
Preparation and Characterization of Tellurium Nanorods S Sugapriya, S Ra, L Sa
MOST CITED SCHOLAR PUBLICATIONS
Effect of annealing on TiO2 nanoparticles S Sugapriya, R Sriram, S Lakshmi Optik 124 (21), 4971-4975 , 2013 2013.0 Citations: 112
Effect on the growth performance of broiler chickens by selenium nanoparticles supplementation CK Senthil Kumaran, S Sugapriya, N Manivannan, B Chandar Shekar Nano Vision 5 (4-6), 161-168 , 2015 2015.0 Citations: 28
Effect on Annealing Temperature on ZnO nanoparticles SKCK Sugapriya S, Lakshmi .S International Journal of Chem Tech Research 8 (6), 297-302 , 2015 2015.0 Citations: 8
Structural, morphological, opto-luminescence and magnetic behavioral variations of Co-ZnS hybrid nanoparticles S Manivannan, Chandra Shekar, SENTHILKUMARAN Indian Journal of Physics 94, 919 - 925 , 2020 2020.0 Citations: 7
ZnO Needle-like structures: Synthesis and characterization S Sugapriya, S Lakshmi, B Chandarshekar, R Ranjithkumar Kongunadu Research Journal 2 (2), 13-15 , 2015 2015.0 Citations: 7
Influence of Dietary Selenium Nanowires on Growth Performance of Broiler Chicken RRCB 6. Senthil Kumaran C K, Sugapriya S, Dhayalan Velauthapillai International Journal of Biosciences and Nanosciences 2 (4), 78-83 , 2015 2015.0 Citations: 7
Influence of dietary selenium nanowires on growth performance of broiler chicken CK Senthil Kumaran, S Sugapriya, V Dhayalan, R Ranjithkumar, ... Int. J. Biosci. Nanosci 2, 78-83 , 2015 2015.0 Citations: 5
Phase change on TiO2 nanoparticles by annealing S Sugapriya, S Lakshmi, CK Senthil Kumaran, N Manivannan, ... UGC-SERO Sponsored Second National Conference on Thin Film Science & Nano … , 2015 2015.0 Citations: 1
Change of phase by annealing on TiO 2 nanoparticles S Subbaiyan, S Rangarajalu, L Sriram Russian Journal of Applied Chemistry 86 (6), 811-816 , 2013 2013.0 Citations: 1
Effect of Theermal growth on structural and Optical properties SKCK 9. Sugapriya S, Lakshmi .S International Journal of Chem Tech Research 8 (6), 303-308 , 2015 2015.0
Erratum to: “Change of phase by annealing on TiO 2 nanoparticles” S Subbaiyan, S Rangarajalu, L Sriram Russian Journal of Applied Chemistry 86 (9), 1463-1463 , 2013 2013.0
Synthesis and Characterization of Silver Nanowires S Sugapriya, R Sriram, S Lakshmi Advanced Materials Research 678, 212-216 , 2013 2013.0
Structural and Electrical Conductivity of ZnO Nano Bi-pyramids-like Structure S Sugapriya, R Sriram, S Lakshmi Emerging Trends in Science, Engineering and Technology: Proceedings of … , 2012 2012.0
Structural and Electrical Properties of ZnO Flower-like structures S Sugapriya, S Lakshmi, CK Senthil Kumaran, N Manivannan, ... UGC-SERO Sponsored Second National Conference on Thin Film Science & Nano … , 0
Preparation and Characterization of Tellurium Nanorods S Sugapriya, S Ra, L Sa
