تصفح Materials Science & Technology حسب المؤلف "Ponnamma, D."
-
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 ... -
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 ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
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 ... -
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 ... -
Enhanced morphology and mechanical characteristics of clay/styrene butadiene rubber nanocomposites
Usha Devi K.S.; Ponnamma D.; Causin V.; Maria H.J.; Thomas S. ( Elsevier Ltd , 2015 , Article)Achieving complete exfoliation of clay in their polymer nanocomposite is a matter of interest as it can significantly affect the material properties. Herein, an efficient way of enhancing the interlayer spaces of organically ... -
Fabrication of high-performance symmetric supercapacitor of graphene electrodes by tuning their electrochemical properties
Rajeevan, S.; John, S.; Ponnamma, D.; George, S.C. ( Elsevier Ltd , 2022 , Article)The electrochemical efficiency of a supercapacitor highly depends on the electrochemical properties of electrodes used in its fabrication. Herein, we synthesize highly efficient reduced graphene oxide (rGO) electrodes by ... -
Flexible pressure sensor based on PVDF nanocomposites containing reduced graphene oxide-titania hybrid nanolayers
Al-Saygh A.; Ponnamma D.; AlMaadeed M.A.; Poornima Vijayan P.; Karim A.; Hassan M.K.... more authors ... less authors ( MDPI AG , 2017 , Article)A novel flexible nanocomposite pressure sensor with a tensile strength of about 47 MPa is fabricated in this work. Nanolayers of titanium dioxide (titania nanolayers, TNL) synthesized by hydrothermal method are used to ... -
Flexible tri-layer piezoelectric nanogenerator based on PVDF-HFP/Ni-doped ZnO nanocomposites
Parangusan H.; Ponnamma D.; Al Ali Almaadeed M. ( Royal Society of Chemistry , 2017 , Article)In this work, we report Ni doped ZnO/poly(vinylidene fluoride-hexafluoropropylene) [PVDF-HFP] nanocomposites prepared by sandwiching and their structural, morphological, thermal, electrical and piezoelectric properties. ... -
Free-volume correlation with mechanical and dielectric properties of natural rubber/multi walled carbon nanotubes composites
Ponnamma D.; Ramachandran R.; Hussain S.; Rajaraman R.; Amarendra G.; Varughese K.T.; Thomas S.... more authors ... less authors ( Elsevier Ltd , 2015 , Article)Abstract The microstructure, mechanical strength, dielectric properties, Doppler broadening measurements and positron life time studies of the composites containing multi walled carbon nanotubes (MWCNTs) and natural rubber ... -
Gas Sensing and Power Harvesting Polyvinylidene Fluoride Nanocomposites Containing Hybrid Nanotubes
Ponnamma D.; Sharma A.K.; Saharan P.; Al-Maadeed M.A.A. ( Springer , 2020 , Article)Gas sensing properties at room temperature and energy harvesting performances are realized for the polyvinylidene fluoride (PVDF) nanocomposites containing titanium dioxide (TiO2) nanotubes grown in the presence of carbon ... -
Graphene and graphitic derivative filled polymer composites as potential sensors
Ponnamma D.; Guo Q.; Krupa I.; Al-Maadeed M.A.S.A.; Varughese K.T.; Thomas S.; Sadasivuni K.K.... more authors ... less authors ( Royal Society of Chemistry , 2015 , Article)Graphite and numerous graphitic-derived micro- and nano-particles have gained importance in current materials science research. These two-dimensional sheets of sp2-hybridized carbon atoms remarkably influence the properties ... -
In situ synthesized amphiphilic polysulfone-poly(ethylene-glycol) block copolymer/silver nanocomposite for separating oil/water emulsion
Elgawady Y.; Ponnamma D.; Hassan M.K.; Adham S.; Karim A.; Al-Maadeed M.A.A.... more authors ... less authors ( John Wiley and Sons Inc , 2022 , Article)This work reports the synthesis of silver nanoparticles from the precursors, silver nitrate and sodium bromide, and the in situ synthesis of polysulfone (PSf)-poly(ethylene-glycol) (PEG) block copolymer (BCP) in the presence ... -
Investigation on the effect of γ-irradiation on the dielectric and piezoelectric properties of stretchable PVDF/Fe–ZnO nanocomposites for self-powering devices
Parangusan H.; Ponnamma D.; Almaadeed M.A.A. ( Royal Society of Chemistry , 2018 , Article)Stretchable films of PVDF nanocomposites containing iron doped ZnO (Fe-ZnO) nanoflowers are fabricated following simple solution mixing and ?-irradiation treatment. An increase in ?-phase crystallinity is noticed for the ...