I am studying Doctor of Philosophy in PHYSICS at the Department of Physics, BUB. I am conducting research on metal nano-particles embedded oxide glasses for photonic device applications in the Department of Physics Lab of Bangalore University, INDIA.
Photocatalytic and antimicrobial activities of biofunctionalized Ag nanoparticles derived from combustion method D. Rajeshree Patwari, B.N. Swetha, K. Gurushantha, G. Shobha, N. Srinatha, Sadanand K. Mushrif, Rajeev Ramachandra Kolgi, K.P. Roopa, K. Keshavamurthy Results in Optics, 2023 The major global concern for human life is due to the toxic impact of synthetic dyes and hazardous microorganisms (bacteria). In this view, much research is focused on the antimicrobial and photocatalytic activities by preparing metallic-natured metal nanoparticles either through chemical or bio-/green-mediated methods. In this aspect, in the present work, we demonstrate the synthesis of silver nanoparticles (AgNPs) by a simple well-known chemical method, the solution combustion synthesis (SCS) method. The prepared AgNPs were subjected to various structural, optical, antimicrobial, and photocatalytic studies. In particular, we have explored the influence of AgNPs on S. aureus, B. subtilis, P. aeruginosa, and E. coli bacteria to investigate antimicrobial behavior activities. Structural studies by XRD and TEM results reveal the formation of crystalline, nano-sized AgNPs by SCS due to the exothermicity of the fuel used in the synthesis. Optical studies by UV–visible spectroscopy reveal the presence of surface plasmonic resonance (SPR) peak at or around 440 nm, which signifies the formation of AgNPs in accordance with the XRD and TEM results. The synthesized AgNPs demonstrated potential antimicrobial activity against the bacteria S. aureus, B. subtilis, P. aeruginosa, and E. coli. The zone of inhibition surrounding B. subtilis is the most susceptible of the tested bacteria. Furthermore, AgNPs showed remarkable photocatalytic activity in the degradation of indigo carmine dye.
Enhanced Optical Properties of Eu 2 O 3 -Doped Zinc Borate Lanthanum Glasses with Gold Nanoparticle Integration DS Gnanendra, K Keshavamurthy, V Hegde, AP Chowdhury, BN Swetha Journal of Inorganic and Organometallic Polymers and Materials, 1-15 , 2025 2025 Citations: 1
Enhanced Solid-State Lighting Performance of AuNPs-Embedded Dy2O3-Containing La2O3-Na2O-TeO2-B2O3 Glasses BN Swetha, V Hegde, DR Lavanya, MK Kokila Ceramics International , 2025 2025
Sodium Lanthanum Boro-Tellurite Glasses with Sm3+ Ion Doping and Gold Nanoparticle Embedding: A New Glass Matrix for Solid State Lighting Devices BN Swetha, AP Chowdhury, MK Kokila Journal of Alloys and Compounds 1010, 177628 , 2025 2025 Citations: 6
Low concentration Sm3+ ions loaded zinc sodium borate glasses for solid state lighting devices K Keshavamurthy, C Vidya, T Uthayakumar, V Hegde, CM Joseph, ... Optical Materials 148, 114829 , 2024 2024 Citations: 16
Enhanced nonlinear optical absorption and optical limiting performance of nanoparticles embedded lanthanum alkali borate glasses bearing holmium ions at off–resonant spectral … BN Swetha, K Keshavamurthy, AL Latha, AG Pramod, G Jagannath, ... Optical Materials 145, 114462 , 2023 2023 Citations: 5
Structural, optical, photocatalytic, and antimicrobial attributes of niobium substituted copper nanoferrites K Gurushantha, BN Swetha, S Chinnam, K Keshavamurthy, S Meena, ... Inorganic Chemistry Communications 156, 111162 , 2023 2023 Citations: 11
Photocatalytic and antimicrobial activities of biofunctionalized Ag nanoparticles derived from combustion method DR Patwari, BN Swetha, K Gurushantha, G Shobha, N Srinatha, ... Results in Optics 12, 100472 , 2023 2023 Citations: 6
Nonlinear optical properties of gold nanoparticles containing borate glasses at spectral region of surface plasmon resonance K Gurushantha, BN Swetha, SB Kolavekar, AG Pramod, AH Almuqrin, ... Materials Today Communications 35, 106032 , 2023 2023 Citations: 13
Effect of heat treatment on photoluminescence attributes of Sm 3+ doped B 2 O 3 -Na 2 O-La 2 O 3 glasses embedded with silver nanoparticles BN Swetha, K Keshavamurthy, G Jagannath, K Gurushantha, DA Aloraini, ... Applied Physics A 128 (8), 679 , 2022 2022 Citations: 2
Improved photoluminescence and spectroscopic features of Sm3+‒doped alkali borate glasses by embedding silver nanoparticles BN Swetha, K Keshavamurthy, AG Pramod, G Devarajulu, KP Roopa, ... Journal of Non-Crystalline Solids 579, 121371 , 2022 2022 Citations: 21
Optimising the Eu2O3 concentration and tuning the photoluminescence attributes of Eu2O3 doped borate glasses by Co–doping with silver nanoparticles N Fatima, KN Sathish, AG Pramod, V Hegde, MM Hivrekar, ... Journal of Non-Crystalline Solids 576, 121250 , 2022 2022 Citations: 14
Improved near‒infrared nonlinear optical properties of Sm3+ containing borate glasses: Effect of silver nanoparticles concentration K Keshavamurthy, BN Swetha, FF Al‒Harbi, AH Almuqrin, MI Sayyed, ... Optical Materials 122, 111804 , 2021 2021 Citations: 13
Near-infrared nonlinear optical characteristics of silver nanoparticles embedded borate glasses activated with Sm3+ ions: Effect of heat treatment K Keshavamurthy, BN Swetha, KN Sathish, AG Pramod, I Kebaili, ... Infrared Physics & Technology 119, 103959 , 2021 2021 Citations: 14
Influence of size of Ag NP on spectroscopic performances of Eu3+ ions in sodium borate glass host BN Swetha, K Keshavamurthy, G Jagannath Optik 240, 166918 , 2021 2021 Citations: 18
Silver nanoparticles enhanced photoluminescence and the spectroscopic performances of Nd3+ ions in sodium lanthanum borate glass host: Effect of heat treatment BN Swetha, K Keshavamurthy, G Gupta, DA Aloraini, AH Almuqrin, ... Ceramics International 47 (15), 21212-21220 , 2021 2021 Citations: 40
Nonlinear optical, optical limiting and radiation shielding features of Eu3+ activated borate glasses G Jagannath, AG Pramod, K Keshavamurthy, BN Swetha, B Eraiah, ... Optik 232, 166563 , 2021 2021 Citations: 35
Enhanced 1.53 µm emission of Er3+ in nano-Ag embedded sodium-boro-lanthanate glasses BN Swetha, G Devarajulu, K Keshavamurthy, G Jagannath, HR Deepa Journal of Alloys and Compounds 856, 158212 , 2021 2021 Citations: 25
Corrigendum to "Impact of thermal annealing time on luminescence properties of Eu 3+ ions in silver nanoparticles embedded lanthanum sodium borate glasses … BN Swetha, K Keshavamurthy Applied Surface Science 541, 148513 , 2021 2021
Impact of thermal annealing time on luminescence properties of Eu3+ ions in silver nanoparticles embedded lanthanum sodium borate glasses BN Swetha, K Keshavamurthy Applied Surface Science 525, 146505 , 2020 2020 Citations: 26
Silver nanoparticles enhanced photoluminescence and the spectroscopic performances of Nd3+ ions in sodium lanthanum borate glass host: Effect of heat treatment BN Swetha, K Keshavamurthy, G Gupta, DA Aloraini, AH Almuqrin, ... Ceramics International 47 (15), 21212-21220 , 2021 2021 Citations: 40
Nonlinear optical, optical limiting and radiation shielding features of Eu3+ activated borate glasses G Jagannath, AG Pramod, K Keshavamurthy, BN Swetha, B Eraiah, ... Optik 232, 166563 , 2021 2021 Citations: 35
Impact of thermal annealing time on luminescence properties of Eu3+ ions in silver nanoparticles embedded lanthanum sodium borate glasses BN Swetha, K Keshavamurthy Applied Surface Science 525, 146505 , 2020 2020 Citations: 26
Enhanced 1.53 µm emission of Er3+ in nano-Ag embedded sodium-boro-lanthanate glasses BN Swetha, G Devarajulu, K Keshavamurthy, G Jagannath, HR Deepa Journal of Alloys and Compounds 856, 158212 , 2021 2021 Citations: 25
Improved photoluminescence and spectroscopic features of Sm3+‒doped alkali borate glasses by embedding silver nanoparticles BN Swetha, K Keshavamurthy, AG Pramod, G Devarajulu, KP Roopa, ... Journal of Non-Crystalline Solids 579, 121371 , 2022 2022 Citations: 21
Influence of size of Ag NP on spectroscopic performances of Eu3+ ions in sodium borate glass host BN Swetha, K Keshavamurthy, G Jagannath Optik 240, 166918 , 2021 2021 Citations: 18
Low concentration Sm3+ ions loaded zinc sodium borate glasses for solid state lighting devices K Keshavamurthy, C Vidya, T Uthayakumar, V Hegde, CM Joseph, ... Optical Materials 148, 114829 , 2024 2024 Citations: 16
Optimising the Eu2O3 concentration and tuning the photoluminescence attributes of Eu2O3 doped borate glasses by Co–doping with silver nanoparticles N Fatima, KN Sathish, AG Pramod, V Hegde, MM Hivrekar, ... Journal of Non-Crystalline Solids 576, 121250 , 2022 2022 Citations: 14
Near-infrared nonlinear optical characteristics of silver nanoparticles embedded borate glasses activated with Sm3+ ions: Effect of heat treatment K Keshavamurthy, BN Swetha, KN Sathish, AG Pramod, I Kebaili, ... Infrared Physics & Technology 119, 103959 , 2021 2021 Citations: 14
Nonlinear optical properties of gold nanoparticles containing borate glasses at spectral region of surface plasmon resonance K Gurushantha, BN Swetha, SB Kolavekar, AG Pramod, AH Almuqrin, ... Materials Today Communications 35, 106032 , 2023 2023 Citations: 13
Improved near‒infrared nonlinear optical properties of Sm3+ containing borate glasses: Effect of silver nanoparticles concentration K Keshavamurthy, BN Swetha, FF Al‒Harbi, AH Almuqrin, MI Sayyed, ... Optical Materials 122, 111804 , 2021 2021 Citations: 13
Structural, optical, photocatalytic, and antimicrobial attributes of niobium substituted copper nanoferrites K Gurushantha, BN Swetha, S Chinnam, K Keshavamurthy, S Meena, ... Inorganic Chemistry Communications 156, 111162 , 2023 2023 Citations: 11
Sodium Lanthanum Boro-Tellurite Glasses with Sm3+ Ion Doping and Gold Nanoparticle Embedding: A New Glass Matrix for Solid State Lighting Devices BN Swetha, AP Chowdhury, MK Kokila Journal of Alloys and Compounds 1010, 177628 , 2025 2025 Citations: 6
Photocatalytic and antimicrobial activities of biofunctionalized Ag nanoparticles derived from combustion method DR Patwari, BN Swetha, K Gurushantha, G Shobha, N Srinatha, ... Results in Optics 12, 100472 , 2023 2023 Citations: 6
Enhanced nonlinear optical absorption and optical limiting performance of nanoparticles embedded lanthanum alkali borate glasses bearing holmium ions at off–resonant spectral … BN Swetha, K Keshavamurthy, AL Latha, AG Pramod, G Jagannath, ... Optical Materials 145, 114462 , 2023 2023 Citations: 5
Effect of heat treatment on photoluminescence attributes of Sm 3+ doped B 2 O 3 -Na 2 O-La 2 O 3 glasses embedded with silver nanoparticles BN Swetha, K Keshavamurthy, G Jagannath, K Gurushantha, DA Aloraini, ... Applied Physics A 128 (8), 679 , 2022 2022 Citations: 2
Enhanced Optical Properties of Eu 2 O 3 -Doped Zinc Borate Lanthanum Glasses with Gold Nanoparticle Integration DS Gnanendra, K Keshavamurthy, V Hegde, AP Chowdhury, BN Swetha Journal of Inorganic and Organometallic Polymers and Materials, 1-15 , 2025 2025 Citations: 1
Enhanced Solid-State Lighting Performance of AuNPs-Embedded Dy2O3-Containing La2O3-Na2O-TeO2-B2O3 Glasses BN Swetha, V Hegde, DR Lavanya, MK Kokila Ceramics International , 2025 2025
Corrigendum to "Impact of thermal annealing time on luminescence properties of Eu 3+ ions in silver nanoparticles embedded lanthanum sodium borate glasses … BN Swetha, K Keshavamurthy Applied Surface Science 541, 148513 , 2021 2021