Search results for: M. Gunaseelan

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article

EDTA functionalization of SrF₂:Yb,Er nanoparticles by hydrothermal synthesis: Intense red upconversion, NIR-to-NIR emission and luminescence nanothermometry characteristics

J. Senthilselvan, Sinju Thomas, L. Anbharasi, Debashrita Sarkar, more

Journal of Materials Science: Materials in Electronics > 2019 > 30 > 23 > 20376- 20392

SrF₂ based upconversion nanoparticles (UCNPs) were synthesized by hydrothermal method using ethylenediaminetetraacetic acid (EDTA) as surfactant, by doping with single-lanthanide-activator Er ion and sensitizer-activator Yb³⁺−Er³⁺ ion-pair. The excited state absorption (ESA) and energy transfer upconversion (ETU) properties were investigated respectively by synthesizing SrF₂:2%Er and SrF₂:20%Yb,2%Er...

article

Highly efficient upconversion luminescence in hexagonal NaYF4:Yb3+, Er3+ nanocrystals synthesized by a novel reverse microemulsion method

M. Gunaseelan, S. Yamini, G.A. Kumar, J. Senthilselvan

Optical Materials > 2018 > 75 > C > 174-186

A new reverse microemulsion system is proposed for the first time to synthesize NaYF₄:Yb,Er nanocrystals, which demonstrated high upconversion emission in 550 and 662 nm at 980 nm diode laser excitation. The reverse microemulsion (μEs) system is comprised of CTAB and oleic acid as surfactant and 1-butanol co-surfactant and isooctane oil phase. The surfactant to water ratio is able to tune the microemulsion...

article

Structural, Optical and Impedance Studies of Hydrothermally and Solvothermally Prepared SnO₂ Nanocrystallites for Conducting Electrode Application

K. Ashok Kumar, D. Ramesh, M. Gunaseelan, K. Subalakshmi, more

Transactions of the Indian Institute of Metals > 2015 > 68 > 2 > 221-225

Nanocrystalline SnO₂ powders were synthesized by hydrolysis and solvolysis of SnCl₂ followed by a fast nucleation process in Teflon lined autoclave. The as prepared samples were calcined at 400 ^°C for 4 h to attain stable phase. The X-ray diffraction pattern confirms tetragonal crystal structure for both hydrothermally and solvothermally prepared nanoparticles and the average crystallite size is calculated...

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Search results for: M. Gunaseelan

EDTA functionalization of SrF₂:Yb,Er nanoparticles by hydrothermal synthesis: Intense red upconversion, NIR-to-NIR emission and luminescence nanothermometry characteristics

Highly efficient upconversion luminescence in hexagonal NaYF4:Yb3+, Er3+ nanocrystals synthesized by a novel reverse microemulsion method

Structural, Optical and Impedance Studies of Hydrothermally and Solvothermally Prepared SnO₂ Nanocrystallites for Conducting Electrode Application

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INFONA - science communication portal

Search results for: M. Gunaseelan

EDTA functionalization of SrF2:Yb,Er nanoparticles by hydrothermal synthesis: Intense red upconversion, NIR-to-NIR emission and luminescence nanothermometry characteristics

Highly efficient upconversion luminescence in hexagonal NaYF4:Yb3+, Er3+ nanocrystals synthesized by a novel reverse microemulsion method

Structural, Optical and Impedance Studies of Hydrothermally and Solvothermally Prepared SnO2 Nanocrystallites for Conducting Electrode Application

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EDTA functionalization of SrF₂:Yb,Er nanoparticles by hydrothermal synthesis: Intense red upconversion, NIR-to-NIR emission and luminescence nanothermometry characteristics

Structural, Optical and Impedance Studies of Hydrothermally and Solvothermally Prepared SnO₂ Nanocrystallites for Conducting Electrode Application