Browsing by Author "Ponnamma, Deepalekshmi"
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Fumed SiO2 nanoparticle reinforced biopolymer blend nanocomposites with high dielectric constant and low dielectric loss for flexible organic electronics
Deshmukh, Kalim; Ahamed, M. Basheer; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; AlMaadeed, Mariam Al?Ali; Deshmukh, Rajendra R.; Pasha, S. K. Khadheer; Polu, Anji Reddy; Chidambaram, K.... more authors ... less authors ( John Wiley and Sons Inc. , 2017 , Article)In the present study, fumed silica (SiO2) nanoparticle reinforced poly(vinyl alcohol) (PVA) and poly(vinylpyrrolidone) (PVP) blend nanocomposite films were prepared via a simple solution‐blending technique. Fourier transform ... -
Graphene oxide nanocomposites based room temperature gas sensors: A review
Thangamani, G. J.; Deshmukh, Kalim; Nambiraj, N. A.; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar; Abdul Khalil, H. P. S.; Pasha, S. K. Khadheer... more authors ... less authors ( Elsevier Ltd , 2021 , Article)Over the last few decades, various volatile organic compounds (VOCs) have been widely used in the processing of building materials and this practice adversely affected the environment i.e. both indoor and outdoor air ... -
Graphene oxide reinforced poly (4-styrenesulfonic acid)/polyvinyl alcohol blend composites with enhanced dielectric properties for portable and flexible electronics
Deshmukh, Kalim; Ahamed, M. Basheer; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; AlMaadeed, Mariam Al-Ali; Pasha, S. K. Khadheer; Deshmukh, Rajendra R.; Chidambaram, K.... more authors ... less authors ( Elsevier Ltd , 2017 , Article)In this work, Graphene Oxide (GO) reinforced novel polymer composites comprising of poly (4-styrenesulfonic acid) (PSSA) and polyvinyl alcohol (PVA) blend matrix have been developed using colloidal processing technique. ... -
Graphene oxide reinforced polyvinyl alcohol/polyethylene glycol blend composites as high-performance dielectric material
Deshmukh, Kalim; Ahamed, M. Basheer; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; Deshmukh, Rajendra R.; Pasha, S. K. Khadheer; AlMaadeed, Mariam Al-Ali; Chidambaram, K.... more authors ... less authors ( Springer Netherlands , 2016 , Article)Novel flexible dielectric composites composed of polyvinyl alcohol (PVA), polyethylene glycol (PEG), and graphene oxide (GO) with high dielectric constant and low dielectric loss have been developed using facile and ... -
Highly selective gas sensors from photo-activated ZnO/PANI thin films synthesized by mSILAR
Thomas, Deepu; Thomas, Ajith; Tom, Anju Elsa; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; Goutham, Solleti; Cabibihan, John-John; Venkateswara Rao, Kalagadda... more authors ... less authors ( Elsevier Ltd , 2017 , Article)Zinc oxide (ZnO) nano-polycrystalline thin films has been prepared by cost-effective microwave assisted successive ionic layer adsorption and reaction (mSILAR) technique. ZnO/PANI prepared by in situ polymerization technique ... -
Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications
Deshmukh, Kalim; Ahamed, M. Basheer; Polu, Anji Reddy; Sadasivuni, Kishor Kumar; Pasha, S. K. Khadheer; Ponnamma, Deepalekshmi; AlMaadeed, Mariam Al-Ali; Deshmukh, Rajendra R.; Chidambaram, K.... more authors ... less authors ( Springer New York LLC , 2016 , Article)New solid polymer blend electrolyte films based on biodegradable polymer blend comprising of polyvinyl alcohol (PVA) and poly (N-vinyl pyrrolidone) (PVP) doped with different wt% of lithium carbonate (Li2CO3) salt have ... -
Influence of BaTiO 3 /white graphene filler synergy on the energy harvesting performance of a piezoelectric polymer nanocomposite
Ponnamma, Deepalekshmi; Al-Maadeedab, Mariam Al Ali ( Royal Society of Chemistry , 2019 , Article)In this work, a novel ternary polyvinylidene fluoride hexafluoropropylene (PVDF-HFP) nanocomposite containing ceramic barium titanate nanoparticles (BaTiO 3 ) and hexagonal boron nitride (h-BN) nanolayers is developed. An ... -
Influence of temperature on the confinement effects of micro and nano level graphite filled poly(isoprene-co-isobutylene) composites
Ponnamma, Deepalekshmi; Saiter, Allisson; Saiter, Jean Marc; Thomas, Sabu; Grohens, Yves; AlMaadeed, Mariam Al-Ali; Sadasivuni , Kishor Kumar... more authors ... less authors ( Springer Netherlands , 2016 , Article)Electrically conducting elastomer composites using nanocarbon fillers have utmost significance in the current scenario of flexible electronics. Though a large number of reports have come out in this topic, the influence ... -
Investigation of antimicrobial properties and in-vitro bioactivity of Ce3+-Sr2+dual-substituted nano hydroxyapatites
Sundarabharathi, Lakshmanaperumal; Chinnaswamy, Mahendran; Ponnamma, Deepalekshmi; Parangusan, Hemalatha; Al-Maadeed, Mariam Al Ali ( Blackwell Publishing Inc. , 2019 , Article)Dual doped calcium apatite has been widely focused as it enhances the osteoconductive property for the possible applications in orthopedic and dental implants. In this work, we investigate the antimicrobial and bioactive ... -
Laser Induced Periodic Surface Structures on Nano Metal Oxide filled Polyvinylidene Fluoride Nanocomposites
Ponnamma, Deepalekshmi; Sivakumar, Velautham; Popelka, Anton; Hussein, Yasser H. A.; Al-Maadeed, Mariam Al Ali ( Elsevier , 2018 , Article)The ability of polarized pulsed laser in surface modification of substrate surfaces without thermally destroying them is a well-established concept of scientific procedure. In this work, we report the laser induced surface ... -
Microton irradiation induced tuning of dielectric properties of nano ZnO-natural rubber disks
Thomas, Deepu; Vijayalakshmi, K. A.; Mathen, Jobin Job; Augustine, Simon; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar; Cabibihan, John-John... more authors ... less authors ( Springer Verlag , 2017 , Article)The effect of electron beam irradiation of dielectric and conductivity properties of nano ZnO-natural rubber (NR) disks was investigated here. It is revealed that electric properties such as AC conductivity, dielectric ... -
Microtron Irradiation Induced Tuning of Band Gap and Photoresponse of Al-ZnO Thin Films Synthesized by mSILAR
Thomas, Deepu; Augustine, Simon; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; Alhaddad, Ahmad Yaser; Cabibihan, John-John; Vijayalakshmi, K.A.... more authors ... less authors ( Springer New York LLC , 2016 , Article)Al-doped polycrystalline nano ZnO (Al-ZnO) thin films with different doping concentrations were successfully prepared by the microwave-assisted successive ionic layer adsorption and reaction (mSILAR) technique. The structural ... -
Oleic acid-grafted chitosan/graphene oxide composite coating for corrosion protection of carbon steel
Fayyad, Eman M.; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; Al-Maadeed, Mariam Al Ali ( Elsevier Ltd , 2016 , Article)An anticorrosion coating film based on the formation of nanocomposite coating is reported in this study. The composite consisted of chitosan (green matrix), oleic acid, and graphene oxide (nano filler). The nanocomposite ... -
Photoinduced electron transfer interaction of anthraquinones with aniline quenchers: Influence of methyl substitution in aniline donors
Sivakumar, V.; Ponnamma, Deepalekshmi; Hussein, Yasser H. A. ( Elsevier , 2017 , Article)© 2016 Elsevier B.V. Photoinduced electron transfer between triplet state of 9,10-anthraquinone (AQ) and its two derivatives: 2-chloro-9,10-anthraquinone (CAQ) and sodium anthraquinone-2-sulfonate (AQS) and ground state ... -
Physico-mechanical, dielectric, and piezoelectric properties of PVDF electrospun mats containing silver nanoparticles.
Issa, Ahmed A.; Al-Maadeed, Mariam A.; Luyt, Adriaan S.; Ponnamma, Deepalekshmi; Hassan, Mohammad K. ( C , 2017 , Article)Poly(vinylidene fluoride) (PVDF) is a piezoelectric material with outstanding physical and mechanical properties. The piezoelectric properties depend on the β-phase content of this polymer, while the physical and mechanical ... -
Piezoelectric Nanogenerators Based On Pvdf-Hfp/Zno Mesoporous Silica Nanocomposites For Self-Powering Devices
Abdul-kareem, Asma Abdulgader; AlSanari, Noura; Daifallah, Amal; Mohamed, Radwa; Bhadra, Jolly; Ponnamma, Deepalekshmi; Al-Thani, Noora... more authors ... less authors ( Qatar University Press , 2020 , Poster)Due to the rising global concern over energy catastrophe and environmental issues, attention has been diverted towards future energy. In recent times, rechargeable power and renewable energy sources have been considered ... -
Poly-carboxylic acids functionalized chitosan nanocarriers for controlled and targeted anti-cancer drug delivery
Rajan, Mariappan; Murugan, Maruthamuthu; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar; Munusamy, Murugan A. ( Elsevier Masson SAS , 2016 , Article)The present study evaluates the in-vitro cisplatin (CDDP) release from four different poly oxalates cross-linked chitosan (CS) nanocomposites. The poly oxalates were synthesized from the reaction of four different dicarboxylic ... -
Polymer-metal oxide composite nanofibers
Elkahlout, Zainab Ibrahim; AlAhzm, Abdulrahman Mohmmed; Alejli, Maan Omar; AlMaadeed, Fatima Zayed; Ponnamma, Deepalekshmi; Al-Maadeed, Mariam Al Ali... more authors ... less authors ( Elsevier , 2021 , Book chapter)Extensive studies have been conducted on different kinds of polymers, their composites, and multifunctionalities, depending on their structural features. Metal oxides and their polymer nanocomposites offer technological ... -
Polyvinyl alcohol (PVA)/polystyrene sulfonic acid (PSSA)/carbon black nanocomposite for flexible energy storage device applications
Mohanapriya, M. K.; Deshmukh, Kalim; Chidambaram, K.; Ahamed, M. Basheer; Sadasivuni, Kishor Kumar; Ponnamma, Deepalekshmi; AlMaadeed, Mariam Al-Ali; Deshmukh, R. R.; Pasha, S. K. Khadheer... more authors ... less authors ( Springer New York LLC , 2017 , Article)Herein, we report the preparation and characterizations of polyvinyl alcohol (PVA) and polystyrene sulfonic acid (PSSA) blend nanocomposites reinforced with carbon black nanoparticles (CBNPs). The structural changes, ... -
Production of Biodiesel from Soybean Oil in Less Time and at Low Temperature
Choudhary, Rajan; Kumar, Anuj; Ellapani, Vijay Nag; Trinayan, Baruah; Loganathan, Muruganandam; Ravy, Lakshmi; Vijayaparthasarathi, Vijayakumar; Baburao, Amit Mahindrakar; Shanthakumar, Subramaniam; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar; Swamiappan, Sasikumar... more authors ... less authors ( Asian Publication Corporation , 2022 , Article)The heterogeneous catalyst plays an important role in the production of biodiesel at industrial level. In present work, the utilization of wollastonite as a heterogeneous catalyst is attempted to explore its non-biomedical ...