تصفح حسب المؤلف "Ponnamma, D."
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A comparative review of natural and synthetic biopolymer composite scaffolds
Reddy M.S.B.; Ponnamma D.; Choudhary R.; Sadasivuni K.K. ( MDPI AG , 2021 , Article Review)Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery ... -
A pH-sensitive guar gum-: Grafted -lysine-?-cyclodextrin drug carrier for the controlled release of 5-flourouracil into cancer cells
Praphakar R.A.; Jeyaraj M.; Mehnath S.; Higuchi A.; Ponnamma D.; Sadasivuni K.K.; Rajan M.... more authors ... less authors ( Royal Society of Chemistry , 2018 , Article)The physiological environment is a crucial factor in biomedical systems, which can be regulated with relative ease both in vitro and in vivo. Control of pH has emerged as a powerful strategy in cancer therapy because pH ... -
Applications of evacuated tubes collector to harness the solar energy: a review
Mevada D.; Panchal H.; ElDinBastawissi H.A.; Elkelawy M.; Sadashivuni K.; Ponnamma D.; Thakar N.; Sharshir S.W.... more authors ... less authors ( Taylor and Francis Ltd. , 2022 , Article Review)Solar energy is a need of an hour. At present, due to the global warming effect, researchers are moving towards the research work on solar energy. Solar energy can be harnessed by solar thermal collectors. Flat plate ... -
Calcium deficiency in hydroxyapatite and its drug delivery applications
Koppala S.; Swamiappan S.; Gangarajula Y.; Xu L.; Sadasivuni K.K.; Ponnamma D.; Rajagopalan V.... more authors ... less authors ( Institution of Engineering and Technology , 2018 , Article)In this work, calcium deficient hydroxyapatites (HAPs) [Ca 10 ? x (PO 4 ) 6 (OH) 2 ] [where x = 0 ? 0.3] were synthesised by precipitation method and calcined samples were characterised by Fourier transformation infrared ... -
CeO2 Nanostructures Enriched with Oxygen Vacancies for Photocatalytic CO2 Reduction
Hezam A.; Namratha K.; Drmosh Q.A.; Ponnamma D.; Wang J.; Prasad S.; Ahamed M.; Cheng C.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2020 , Article)Synthesizing nanomaterials at the expense of solar energy and the associated energy generation have utmost significance as far as environmental sustainability is concerned. Here, sunlight-assisted combustion synthesis of ... -
Controlling the sensing performance of rGO filled PVDF nanocomposite with the addition of secondary nanofillers
Ponnamma D.; Goutham S.; Sadasivuni K.K.; Rao K.V.; Cabibihan J.J.; Al-Maadeed M.A.A.... more authors ... less authors ( Elsevier Ltd , 2018 , Article)This study reports the synthesis and characterization of polyvinylidene fluoride (PVDF) nanocomposites containing binary filler combination of reduced graphene oxide and titanium dioxide (TiO2) nanotubes. The PVDF nanocomposite ... -
Core-Shell Nanofibers of Polyvinyl Alcohol/Polylactic Acid Containing TiO2 Nanotubes for Natural Sunlight Driven Photocatalysis
Ponnamma D.; Elgawady Y.; Nair S.S.; Hassan M.K.; Al-Maadeed M.A.A. ( John Wiley and Sons Inc , 2022 , Article)Highly stable and efficient coaxial electrospun fibers of polyvinyl alcohol (PVA) and polylactic acid (PLA) nanocomposite filled with titanium dioxide (TiO2) nanotubes areaccomplished for natural sunlight-driven photocatalytic ... -
Core-shell nanofibers of polyvinylidene fluoride-based nanocomposites as piezoelectric nanogenerators
Ponnamma D.; Chamakh M.M.; Alahzm A.M.; Salim N.; Hameed N.; Almaadeed M.A.A.... more authors ... less authors ( MDPI AG , 2020 , Article)Flexible piezoelectric nanogenerators (PENG) are widely applied to harvest sustainable energy from multiple energy sources. The rational and simple design of PENG have great potential in soft electronics. Here we design a ... -
Correlating the rheological and magneto-optical properties of cobalt substituted magnetite ferrofluids (CoxFe1?xFe2O4) with theoretical studies
Babukutty, B.; Ponnamma, D.; Nair, S.S.; Thomas, S. ( Elsevier B.V. , 2023 , Article)Magnetite ferrofluids are widely reported due to their outstanding physicochemical, magnetic and antibacterial properties. This study focusses on the synthesis of magnetite ferrofluids and the effect of Co2+ substitution ... -
Designing carbon nanotube-based oil absorbing membranes from gamma irradiated and electrospun polystyrene nanocomposites
Parangusan H.; Ponnamma D.; Hassan M.K.; Adham S.; Al-Maadeed M.A.A. ( MDPI AG , 2019 , Article)Carbon-based materials are outstanding candidates for oil spill clean-ups due to their superhydrophobicity, high surface area, chemical inertness, low density, recyclability, and selectivity. The current work deals with ... -
Designing Flexible and Porous Fibrous Membranes for Oil Water Separation-A Review of Recent Developments
El-Samak A.A.; Ponnamma D.; Hassan M.K.; Ammar A.; Adham S.; Al-Maadeed M.A.A.; Karim A.... more authors ... less authors ( Bellwether Publishing, Ltd. , 2020 , Article Review)Oil sorbent membranes are highly effective materials in combating oil spills. Recent technological advancements in membrane preparations permit higher oil-sorption efficiency and easier oil recoverability. This review ... -
Development of a piezoelectric nanogenerator based on mesoporous silica/zinc oxide hybrid nanocomposite fibres
Bhadra J.; Ponnamma D.; Alkareem A.; Parangusan H.; Ahmad Z.; Al-Thani N.; Daifalla A.K.E.; Al-Sanari N.A.; Mohamed R.... more authors ... less authors ( John Wiley and Sons Ltd , 2022 , Article)The current research paper presents an investigation of the piezoelectric performances of five different polyvinylidene fluoride hexafluoropropylene (PHP) systems fabricated by electrospinning. Morphological and structural ... -
Dielectric Spectroscopy
Deshmukh, Kalim; Sankaran, Sowmya; Ahamed, Basheer; Sadasivuni, Kishor K.; Pasha, Khadheer S.K.; Ponnamma, Deepalekshmi; Sreekanth, P.S. Rama; Chidambaram, Kuppanna... more authors ... less authors ( Elsevier , 2017 , Book chapter)In this chapter, an attempt has been made to review dielectric spectroscopy (DS) as a technique for the characterization of nanomaterials. DS involves the study of the response of a material to an electric field, which ... -
Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts
Hezam A.; Namratha K.; Ponnamma D.; Drmosh Q.A.; Saeed A.M.N.; Cheng C.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2018 , Article)Limited light absorption, inefficient electron-hole separation, and unsuitable positions of conduction band bottom and/or valence band top are three major critical issues associated with high-efficiency photocatalytic water ... -
Direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures for photocatalytic overall water splitting
Hezam A.; Namratha K.; Drmosh Q.A.; Ponnamma D.; Nagi Saeed A.M.; Ganesh V.; Neppolian B.; Byrappa K.... more authors ... less authors ( Royal Society of Chemistry , 2018 , Article)In this work, a direct Z-scheme Cs2O-Bi2O3-ZnO heterostructure without any electron mediator is fabricated by a simple solution combustion route. Cs2O is chosen as a sensitizer to expand the light absorption range, and in ... -
Eco-Friendly Synthesis of Graphene Oxide Reinforced Hydroxypropyl Methylcellulose/Polyvinyl Alcohol Blend Nanocomposites Filled with Zinc Oxide Nanoparticles for High-k Capacitor Applications
Deshmukh, K.; Ahamed, M.B.; Deshmukh, R.R.; Pasha, S.K.K.; Chidambaram, K.; Sadasivuni, Kishor Kumar; Ponnamma, D.; Al-Maadeed, Mariam Ali S A... more authors ... less authors ( Taylor and Francis Inc. , 2016 , Article)Polymer/inorganic nanocomposites comprising of hydroxypropyl methylcellulose and polyvinyl alcohol as a polymer matrix and unique combination of graphene oxide and zinc oxide nanoparticles as fillers have been prepared ... -
Effect of anions on the structural, morphological and dielectric properties of hydrothermally synthesized hydroxyapatite nanoparticles
Sundarabharathi L.; Ponnamma D.; Parangusan H.; Chinnaswamy M.; Al-Maadeed M.A.A. ( Springer Nature , 2020 , Article)Synthetic nano hydroxyapatites (HA) have been considered as potential biomaterials for bone tissue engineering applications because of its excellent biological properties. The present work deals with the synthesis of HA ... -
Effect of cerium doping on the optical and photocatalytic properties of ZnO nanoflowers
Parangusan H.; Ponnamma D.; Al-Maadeed M.A.A. ( Indian Academy of Sciences , 2019 , Article)Photocatalytic performances of the synthesized cerium doped (Ce-doped) ZnO nanoflowers are reported in this work. A microwave-assisted sol–gel method is adopted for the synthesis of the nanomaterial and its structural and ... -
Effect of phosphorus on controlling and enhancing electrocatalytic performance of Ni–P–TiO2–MnO2 coatings
Shibli, S.M.A.; Ameen Sha, M.; Anisha, B.L.; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar ( Elsevier B.V. , 2018 , Article)Electroless Ni–P coatings have received profound interests in recent years for electrocatalytic Hydrogen Evolution Reaction (HER). Their performance can be significantly enhanced by incorporating metal oxides and tuning ... -
Electrical properties of graphene polymer nanocomposites
Khanam P.N.; Ponnamma D.; AL-Madeed M.A. ( Springer International Publishing , 2015 , Book chapter)Graphene, a monolayer of sp2 hybridized carbon atoms arranged in a two dimensional lattice has attracted electronic industrial interest due to its exceptional electrical properties. One of the most promising applications ...