Browsing by Author "Ponnamma, D."
Now showing items 21-40 of 72
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Enhanced LPG Sensitivity for Electron Beam Irradiated Al-ZnO Nanoparticles
Vattappalam, S.C.; Thomas, D.; Ponnamma, D.; Sadasivuni, Kishor Kumar; Pasha, S.K.K.; Deshmukh, K.... more authors ... less authors ( Wiley-VCH Verlag , 2020 , Article)Al doped and un-doped ZnO thin films are coated on glass substrate by successive ionic layer adsorption and reaction technique with varying doping concentrations of Al from 3 to 7 at%. The samples are annealed at 450 °C ... -
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 ... -
Experimental investigations on spray flames and emissions analysis of diesel and diesel/biodiesel blends for combustion in oxy-fuel burner
ElKelawy M.; Bastawissi H.A.-E.; El-Shenawy E.-S.A.; Panchal H.; Sadashivuni K.; Ponnamma D.; Al-Hofy M.; Thakar N.; Walvekar R.... more authors ... less authors ( John Wiley and Sons Ltd , 2019 , Article)Present research work shows the emissions and flame analysis of oxy-fuel combustion of diesel and diesel/biodiesel blends in the experimental test burner manufactured in Mechanical power engineering laboratory at Tanta ... -
Experimental studies on the biodiesel production parameters optimization of sunflower and soybean oil mixture and DI engine combustion, performance, and emission analysis fueled with diesel/biodiesel blends
Elkelawy M.; Alm-Eldin Bastawissi H.; Esmaeil K.K.; Radwan A.M.; Panchal H.; Sadasivuni K.K.; Ponnamma D.; Walvekar R.... more authors ... less authors ( Elsevier Ltd , 2019 , Article)The influence of diesel/biodiesel blends on engine combustion, performance, and exhaust gas emissions have carried out experimentally at different engine loads and constant speed of 1400 rpm. Volumetric percentage of ... -
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 ... -
Green Synthesis of Silver Nanoparticles from Pterocarpus santalinus Leaf Broth and Their Antibacterial and Antioxidant Activities
Vaishnavi, V.; Sadasivuni, Kishor Kumar; Ponnamma, D.; Golla, N. ( Wiley-VCH Verlag , 2020 , Article)In this study, metallic silver nanoparticles (AgNPs) are synthesized through a simplistic, single-step method, which is a green and eco-friendly process, as it includes medicinal plant aqueous leaf extracts of Pterocarpus ... -
Green synthesized materials for sensor, actuator, energy storage and energy generation: a review
Ponnamma D.; Parangusan H.; Deshmukh K.; Kar P.; Muzaffar A.; Pasha S.K.K.; Ahamed M.B.; Al-Maadeed M.A.A.... more authors ... less authors ( Taylor and Francis Inc. , 2020 , Article)Green synthesis methods have attracted enormous research interest as replacements for dangerous chemicals due to their abundance and eco-friendliness. The remarkable properties of green synthesized materials include ... -
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 ... -
In-vitro biocompatibility, bioactivity and photoluminescence properties of Eu3+/Sr2+ dual-doped nano-hydroxyapatite for biomedical applications
Sundarabharathi L.; Parangusan H.; Ponnamma D.; Al-Maadeed M.A.A.; Chinnaswamy M. ( John Wiley and Sons Inc. , 2018 , Article)In the present investigation, we have successfully synthesized luminescent Eu3+-doped and Eu3+/Sr2+ codoped hydroxyapatite (HA) nanoparticles through sol-gel assisted precipitation method with the aim of developing novel ... -
Influence of CuO nanoparticles and graphene nanoplatelets on the sensing behaviour of poly(vinyl alcohol) nanocomposites for the detection of ethanol and propanol vapors
Thangamani G.J.; Deshmukh K.; Chidambaram K.; Ahamed M.B.; Sadasivuni K.K.; Ponnamma D.; Faisal M.; Nambiraj N.A.; Pasha S.K.K.... more authors ... less authors ( Springer New York LLC , 2018 , Article)Poly(vinyl alcohol)/copper oxide/graphene nanoplatelets (PVA/CuO/Gr-NPls) nanocomposite based chemiresistive alcohol sensors were fabricated using colloidal blending method. The PVA/CuO/Gr-NPls nanocomposite films were ... -
Introduction of Biopolymer Composites: What to do in Electronics?
Ponnamma, D.; Sadasivuni, Kishor Kumar; AlMaadeed, M.A. ( Elsevier Inc. , 2017 , Book chapter)Environment friendly, biodegradable and nontoxic materials especially from renewable resources are attaining great levels of attention nowadays. Biopolymers contribute a very significant division of materials through which ... -
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 ... -
Mesoporous silica filled smart super oleophilic fibers of triblock copolymer nanocomposites for oil absorption applications
Elgawady Y.; Ponnamma D.; Adham S.; Al-Maas M.; Ammar A.; Alamgir K.; Al-Maadeed M.A.A.; Hassan M.K.... more authors ... less authors ( Springer Nature , 2020 , Article)Super oleophilic fibers of styrene-isoprene-styrene (SIS) block copolymer/mesoporous silica (MS) nanocomposites are fabricated by electrospinning, and their oil absorption efficiency is monitored by following two different ... -
Methanol Electrolysis for Hydrogen Production Using Polymer Electrolyte Membrane: A Mini-Review
Pethaiah, S.S.; Sadasivuni, Kishor Kumar; Jayakumar, A.; Ponnamma, D.; Tiwary, C.S.; Sasikumar, G.... more authors ... less authors ( MDPI AG , 2020 , Article Review)Hydrogen (H2) has attained significant benefits as an energy carrier due to its gross calorific value (GCV) and inherently clean operation. Thus, hydrogen as a fuel can lead to global sustainability. Conventional H2 ... -
Molybdenum oxide reinforced polyvinyl alcohol composite as high-performance dielectric material for flexible electronics
Parangusan, K.; Subramaniam, V.; Ganesan, A.; Venkatesh, P.S.; Ponnamma, D. ( Springer , 2023 , Article)Polymer dielectrics are highlighted as capable energy storing materials due to their better dielectric strength and supreme versatility compared to inorganic ceramic dielectrics in sophisticated electronics and pulsed power ...