Patents by Inventor PRADEEP THALAPPIL
PRADEEP THALAPPIL has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11945957Abstract: The present invention relates to a durable and multifunctional superhydrophobic coating composition and water based fabrication method of producing the durable and multifunctional superhydrophobic coating composition via chemical modification and functionalization of hydrophilic material by silanes under room temperature without any organic solvents. Synthesis of chemically modified cellulose nanofibers or clay in water forms excellent water repelling thin films upon coating over various substrates. The super hydrophobic materials are used as additive for paints, pigments, paper, varnish and, textile and used for various industrial applications such as construction of buildings and other super structures.Type: GrantFiled: February 8, 2022Date of Patent: April 2, 2024Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)Inventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Jakka Ravindran Swathy
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Publication number: 20240018624Abstract: The present invention relates to a method for selectively precipitating and extracting gold in aqueous solution by niacin. Aqueous Au3+ is precipitated selectively as it's complex from gold containing acidic mixtures by biomolecule niacin, with the formula [AuCl4]?[2Niacin+H]+. After precipitation, the complex is separated from impurities by filtration. Recovered complex is reduced by using a reductant like sodium metabisulfite (Na2S2O5) to recover gold metal. The method is highly cost-effective, sustainable and recovers about 96.5% of gold in 2 minutes from an electronic waste composed of Au. Cu and Ni. The method is also employed to extract gold from nanomaterials waste generated in laboratories.Type: ApplicationFiled: October 27, 2021Publication date: January 18, 2024Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)Inventors: Pradeep THALAPPIL, Nag ABHIJIT
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Patent number: 11536520Abstract: The present invention relates to a method of enhancing heat transfer of metallic surfaces by (1) fabricating hierarchical micro-nanostructured surfaces using etching processes, and (2) fabricating hydrophobic and hydrophilic regions, using a printing or a coating technique, followed by etching. The said method enhances the density of condensation sites over a metallic surface and additionally facilitates the departure of condensed droplets from the surface. Such a surface also enhances the sensible heat transfer characteristics, and improves the coefficient of performance (COP) of refrigeration systems for applications like atmospheric water generators, dehumidifiers, air conditioners, etc.Type: GrantFiled: February 2, 2019Date of Patent: December 27, 2022Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)Inventors: Pradeep Thalappil, Ankit Nagar, Ramesh Kumar, Srikrishnarka Pillalamarri
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Patent number: 11351508Abstract: The present invention relates to a new method for creating nanopores in single layer molybdenum disulfide (MoS2) nanosheets (NSs) by the electrospray deposition (ESD) of silver ions on a water suspension of the former. Electrospray deposited silver ions react with the MoS2 NSs at the liquid-air interface resulting in Ag2S nanoparticles (NPs) which goes into the solution leaving the NSs with holes of 3-5 nm diameter. Specific reaction with the S of MoS2 NSs leads to Mo-rich edges. Such Mo-rich defects are highly efficient for the generation of active oxygen species such as H2O2, under visible light, which causes efficient disinfection of water. The holey MoS2 NSs shows 105 times higher efficiency in disinfection compared to normal MoS2 NSs. Developed a conceptual prototype and tested with multiple bacterial strains and a viral strain, demonstrating the utility of the method for practical applications.Type: GrantFiled: October 18, 2018Date of Patent: June 7, 2022Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)Inventors: Pradeep Thalappil, Depanjan Sarkar, Anirban Som, Biswajit Mondal, Swathy Jakka Ravindran
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Publication number: 20220162469Abstract: The present invention relates to adurable and multifunctional superhydrophobic coating composition and water based fabrication method of producing the durable and multifunctional superhydrophobic coating composition via chemical modification and functionalization of hydrophilic material by silanes under room temperature without any organic solvents. Synthesis of chemically modified cellulose nanofibers or clay in water forms excellent water repelling thin films upon coating over various substrates. The super hydrophobic materials are used as additive for paints, pigments, paper, varnish and, textile and used for various industrial applications such as construction of buildings and other super structures.Type: ApplicationFiled: February 8, 2022Publication date: May 26, 2022Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
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Patent number: 11242468Abstract: The present invention relates to adurable and multifunctional superhydrophobic coating composition and water based fabrication method of producing the durable and multifunctional superhydrophobic coating composition via chemical modification and functionalization of hydrophilic material by silanes under room temperature without any organic solvents. Synthesis of chemically modified cellulose nanofibers or clay in water forms excellent water repelling thin films upon coating over various substrates. The super hydrophobic materials are used as additive for paints, pigments, paper, varnish and, textile and used for various industrial applications such as construction of buildings and other super structures.Type: GrantFiled: October 17, 2018Date of Patent: February 8, 2022Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (ITT MADRAS)Inventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
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Publication number: 20210205791Abstract: The present invention relates to an ambient ion based method of making free-standing 2D metal sheets made of bare NPs, at the air-liquid interface. An electro-hydrodynamic flow field was generated by electrospray deposition on the liquid surface, which in turn assisted the assembly of the NPs. The NP-NSs were made under ambient conditions at room temperature from metal salt precursors. The sheets can be made of different elements such as Pd, Au, and Ag. Synthesized 2D NP-NSs were used as efficient and reusable heterogeneous catalysts for C—C bond formation reactions. These thin metal sheets may also be used as catalysts, sensors, gas adsorbing media, electrodes for electrochemical reactions, etc.Type: ApplicationFiled: October 12, 2018Publication date: July 8, 2021Inventors: Pradeep THALAPPIL, Depanjan SARKAR, Anirban SOM, Manju C.K
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Publication number: 20210178356Abstract: The process of reacting nanoscale ce-MoS2 nanosheets anchored on oxide support with lead in solution at room temperature whereby the reaction is rapid and spontaneous resulting in the formation of PbMoO4-xSx in the process of scavenging Pb2+ and Pb4+ present in the solution.Type: ApplicationFiled: December 5, 2018Publication date: June 17, 2021Inventors: Pradeep Thalappil, Biswajit Mondal, Ananthu Mahendranath, Anirban Som, Sandeep Bose, Tripti Ahuja, Anil Kumar Avula, Jyotirmoy Ghosh
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Publication number: 20210041192Abstract: The present invention relates to a method of enhancing heat transfer of metallic surfaces by (1) fabricating hierarchical micro-nanostructured surfaces using etching processes, and (2) fabricating hydrophobic and hydrophilic regions, using a printing or a coating technique, followed by etching. The said method enhances the density of condensation sites over a metallic surface and additionally facilitates the departure of condensed droplets from the surface. Such a surface also enhances the sensible heat transfer characteristics, and improves the coefficient of performance (COP) of refrigeration systems for applications like atmospheric water generators, dehumidifiers, air conditioners, etc.Type: ApplicationFiled: February 2, 2019Publication date: February 11, 2021Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)Inventors: Pradeep THALAPPIL, Ankit NAGAR, Ramesh KUMAR, Srikrishnarka PILLALAMARRI
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Publication number: 20200330928Abstract: The present invention relates to a new method for creating nanopores in single layer molybdenum disulfide (MoS2) nanosheets (NSs) by the electrospray deposition (ESD) of silver ions on a water suspension of the former. Electrospray deposited silver ions react with the MoS2 NSs at the liquid-air interface resulting in Ag2S nanoparticles (NPs) which goes into the solution leaving the NSs with holes of 3-5 nm diameter. Specific reaction with the S of MoS2 NSs leads to Mo-rich edges. Such Mo-rich defects are highly efficient for the generation of active oxygen species such as H2O2, under visible light, which causes efficient disinfection of water. The holey MoS2 NSs shows 105 times higher efficiency in disinfection compared to normal MoS2 NSs. Developed a conceptual prototype and tested with multiple bacterial strains and a viral strain, demonstrating the utility of the method for practical applications.Type: ApplicationFiled: October 18, 2018Publication date: October 22, 2020Inventors: Pradeep THALAPPIL, Depanjan SARKAR, Anirban SOM, Biswajit MONDAL, Swathy JAKKA RAVINDRAN
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Publication number: 20190112494Abstract: The present invention relates to adurable and multifunctional superhydrophobic coating composition and water based fabrication method of producing the durable and multifunctional superhydrophobic coating composition via chemical modification and functionalization of hydrophilic material by silanes under room temperature without any organic solvents. Synthesis of chemically modified cellulose nanofibers or clay in water forms excellent water repelling thin films upon coating over various substrates. The super hydrophobic materials are used as additive for paints, pigments, paper, varnish and, textile and used for various industrial applications such as construction of buildings and other super structures.Type: ApplicationFiled: October 17, 2018Publication date: April 18, 2019Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
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Patent number: 10196564Abstract: A luminescent nanocomposite comprising functionalized graphene and a luminescent moiety, its fabrication, and uses are described. The luminescent moiety is anchored non-covalently to the functionalized graphene. Luminescence properties of the nanocomposite may be modulated by choosing appropriate luminescent moieties such as native lactoferrin, native lactoferrin protected gold clusters, and so forth. Mechanical properties of the nanocomposite may be modulated by adding a biopolymer such as Chitosan. The nanocomposite may be used as a luminescent ink for encoding information, or a luminescent film for tagging articles of manufacture such as electronic waste components.Type: GrantFiled: June 27, 2016Date of Patent: February 5, 2019Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Sreeprasad Theruvakkattil Sreenivasan, Shihabudheen Mundampra Maliyekkal
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Patent number: 9903821Abstract: Coated mesoflower are described including: a metallic mesoflower core having a first surface and including at least one protrusion terminating in a tip; a non-metallic coating covering and substantially conformal to the first surface, thereby creating an outer surface of the coated mesoflower; and a marker material having an optical property that is enhanced in the presence of the coated mesoflower. Coated hollow mesoflowers that do not have the metallic mesoflower core are also described.Type: GrantFiled: April 30, 2014Date of Patent: February 27, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Sajanlal Panikkanvalappil Ravindranathan
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Patent number: 9733184Abstract: Composite materials comprising a mesoflower structure, methods of preparing the composite material, and methods of detecting heavy metal ion using the composite material are described herein. In some embodiments, a silica-coated gold mesoflower with a layer of silver quantum clusters may be capable of detecting Hg2+ ions in a sample at zeptomolar concentrations.Type: GrantFiled: August 10, 2012Date of Patent: August 15, 2017Assignee: Indian Institute of Technology MadrasInventors: Pradeep Thalappil, Ammu Mathew, Panikkanvalappil Ravindranathan Sajanlal
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Patent number: 9494517Abstract: A composition includes a quantum cluster of Agm or Aun, one or more protector molecules; and a molecular cavity partially or wholly surrounding the quantum cluster. A method for preparing the quantum clusters includes adding a first amount of glutathione to a gold salt, a silver salt, or a mixture thereof to form a mixture; adding a reducing agent to the mixture to form a precipitate; and mixing the precipitate with a second amount of glutathione and a cyclodextrin to form a composition. Devices are prepared from the quantum clusters, and the devices may be used in methods of authentication of articles.Type: GrantFiled: February 9, 2015Date of Patent: November 15, 2016Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Shibu Sidharth Edakkattuparambil
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Publication number: 20160304778Abstract: A luminescent nanocomposite comprising functionalized graphene and a luminescent moiety, its fabrication, and uses are described. The luminescent moiety is anchored non-covalently to the functionalized graphene. Luminescence properties of the nanocomposite may be modulated by choosing appropriate luminescent moieties such as native lactoferrin, native lactoferrin protected gold clusters, and so forth. Mechanical properties of the nanocomposite may be modulated by adding a biopolymer such as Chitosan. The nanocomposite may be used as a luminescent ink for encoding information, or a luminescent film for tagging articles of manufacture such as electronic waste components.Type: ApplicationFiled: June 27, 2016Publication date: October 20, 2016Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep THALAPPIL, Sreeprasad THERUVAKKATTIL SREENIVASAN, Shihabudheen MUNDAMPRA MALIYEKKAL
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Patent number: 9424505Abstract: A luminescent nanocomposite comprising functionalized graphene and a luminescent moiety, its fabrication, and uses are described. The luminescent moiety is anchored non-covalently to the functionalized graphene. Luminescence properties of the nanocomposite may be modulated by choosing appropriate luminescent moieties such as native lactoferrin, native lactoferrin protected gold clusters, and so forth. Mechanical properties of the nanocomposite may be modulated by adding a biopolymer such as Chitosan. The nanocomposite may be used as a luminescent ink for encoding information, or a luminescent film for tagging articles of manufacture such as electronic waste components.Type: GrantFiled: August 7, 2012Date of Patent: August 23, 2016Assignee: Indian Institute of Technology MadrasInventors: Pradeep Thalappil, Sreeprasad Theruvakkattil Sreenivasan, Shihabudheen Mundampra Maliyekkal
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Publication number: 20160077010Abstract: Coated mesoflower are described including: a metallic mesoflower core having a first surface and including at least one protrusion terminating in a tip; a non-metallic coating covering and substantially conformal to the first surface, thereby creating an outer surface of the coated mesoflower; and a marker material having an optical property that is enhanced in the presence of the coated mesoflower. Coated hollow mesoflowers that do not have the metallic mesoflower core are also described.Type: ApplicationFiled: April 30, 2014Publication date: March 17, 2016Inventors: Pradeep THALAPPIL, Sajanlal Panikkanvalappil RAVINDRANATHAN
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Publication number: 20150153280Abstract: A composition includes a quantum cluster of Agm or Aun, one or more protector molecules; and a molecular cavity partially or wholly surrounding the quantum cluster. A method for preparing the quantum clusters includes adding a first amount of glutathione to a gold salt, a silver salt, or a mixture thereof to form a mixture; adding a reducing agent to the mixture to form a precipitate; and mixing the precipitate with a second amount of glutathione and a cyclodextrin to form a composition. Devices are prepared from the quantum clusters, and the devices may be used in methods of authentification of articles.Type: ApplicationFiled: February 9, 2015Publication date: June 4, 2015Inventors: Pradeep THALAPPIL, Shibu Sidharth EDAKKATTUPARAMBIL
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Patent number: 9034978Abstract: Methods for the synthesis of metal quantum clusters within the framework of a porous gel matrix are described. For example, Ag25(glutathione)18 quantum clusters are synthesized in a cross-linked polyacrylamide gel matrix. The methods can be performed on large-scale and yields monodispersed metal quantum clusters.Type: GrantFiled: December 22, 2011Date of Patent: May 19, 2015Assignee: Indian Institute of Technology MadrasInventors: Pradeep Thalappil, Udayabhaskararao Thumu