Motivated and self-driven Materials Chemist bringing more than 7 years of research and product development experience in the consumer goods and sensors industry.
Proficient in formulation, prototype generation, synthesis and characterization, pilot scale up, regulatory compliance, and focused in sustainable chemistry to resolve practical problems.
Solid background and expertise in materials with focus in polymers, plastics and nanomaterials. Hands on experience in synthesis, polymerization, dye chemistry, inks, thermoplastics processing and result analysis.
Well-organized multitasker with leadership, strategic planning, decision-making abilities and time management.
Application in consumer goods, food safety, thermal sensors
Sustainable product, new materials and technique innovation
Material characterization and analysis - NMR, FTIR, TGA, DSC, GPC, UV-Vis, fluorescence
Experience
Senior R&D Scientist/Chemist, 11/2015 - Current Israel Chemicals Ltd – North Charleston, SC,
Expertise in smart color changing materials for plastics, coatings and printing inks for consumer goods, food safety, medical security sensors and custom applications.
Specialized in prototype generation, complex formulation and synthesis of thermochromic slurry in both RD and pilot scale. Hands on experience using microencapsulation technique that involves phase change materials, organic color former, color developer, stabilizers, different oils, fats, and additives.
Developed sustainable, reversible thermochromic slurry formulation which is BPA and it's analog free - which strengthened organization's business opportunity for food contact applications.
Worked with Photochromic materials, photosensitive materials, photochemistry, data analysis
Plastics processing: Color change plastic masterbatch formulation and processing using extruder, process optimization.
Injection molding on variety of thermoplastic resins, elastomers.
Formulation of different types of color change inks (Liquid crystals-based inks, UV inks, solvent and waterbased inks) thermal food safety sensors, cooking sensors. for and other printing process.
Quality testing and generate solutions for technical challenges, troubleshooting problems for corrective action.
Generating IP, reports, established regulatory compliance and documents, trained and managed junior scientists, technicians, trainees, developed process improvements and streamlined procedures
Patent: Jessica Claire, Hans O. Ribi, "Optical Evanescent Color Change Compositions and Methods of Making and Using the Same." WO2017180898A1.
Quarterly Adjunct Lecturer, 08/2015 - 11/2016 Louisiana State University Healthcare Network: New Orleans – Baton Rouge, LA,
Worked as adjunct faculty for general chemistry laboratory courses.
Research Chemist, 04/2012 - 12/2014 Eeonyx Corporation – City, STATE,
R&D on electrically conductive materials for smart textile, sensor, aerospace and military, electromagnetic inference (EMI) shielding, ESD materials applications.
Experienced in designing experimental plans and method development for multiple R&D projects including:.
Transparent conductive coat formulation on fabric and leather (LBL).
Synthesis and formulation of Intrinsically Conducting Polymers, nanomaterials, hydrogels, surface chemistry.
Development of customized resistive fabric for absorber materials, heat resistant conductive yarn coating, ink formulation, nanocomposite.
Worked with different conducting materials (polymers, carbon nanotubes, metals, nanowires and combination), general polymers, several surface coating techniques, characterization of structure-property, electrical analysis.
Completed both prototype and scale-up following specific customer requirements and strict deadlines, writing technical reports, standard operating procedures, supervised technicians.
Postdoctoral Researcher, 09/2010 - 03/2012 Center For Advanced Microstructures And Devices, Louisiana State University – City, STATE,
Developing a Millifluidic Platform for Synthesis and Time-resolved Mapping of the Growth of Controlled nanostructures.
Worked on high throughput and colloid based controlled synthesis of ultra-small nanocatalysts (gold, copper) using lab-on-a-chip (millifluidic) reactors; hydrodynamic fluidic properties and kinetics of the reactions were supported by computational/ numerical (COMSOL) simulations (Center for Atomic Level Catalyst Design, Energy Frontier Research Center (EFRC), DOE).
In-situ kinetics study of metal nano-clusters inside the millifluidic space were studied via X-ray Absorption Spectroscopy (XAS) technique) using synchrotron beam line (in collaboration with Argonne National Lab.
Education and Training
Ph.D.: Chemistry, Expected in 2010 - University of Central Florida - Orlando, Fl, GPA:
Dissertation: Synthesis and Applications of Novel Self-assembled Block Copolymers: From Superparamagnetic Nanocomposites to Bioimaging; Advisor: Prof. Kevin D. Belfield
Awards: 'Excellence in Graduate Polymer Research' award at 239th American Chemical Society National Meeting
B.Tech: Polymer Science & Technology, Expected in 2003 - University of Calcutta - , GPA:
First class
B.Sc, Chemistry: , Expected in 2000 - Bethune College, University of Calcutta - , GPA:
First class, Honors
Accomplishments
Highly experienced with synthesis of well-defined block copolymer probe for cancers using Two-photon bioimaging techniques, magnetic nanocomposites, systematic testing and characterizations, thorough analysis.
Multi-modal Block Copolymer Probe, Containing Two-photon Absorbing (2PA) Fluorescent Dye, in Targeted Bioimaging for Angiogenesis Treatment: Highly functional polynorbornene based block copolymer carriers were synthesized using Ring Opening Metathesis Polymerizations (ROMP) technique, followed by post-modification on polymeric carrier to covalently attach highly efficient 2PA imaging agent and integrin-specific (RGD based) short peptides for targeted two-photon bioimaging.
Polymeric probe the improved the efficiency of the bioimaging than small molecular probe in carcinogenic cells and tissues.
Enhancement of J-aggregation of Porphyrin-based Dyes, Templated on Cationic Polymers, to Improve Light-harvesting: Novel functionalized cationic polymers were synthesized to induce the J-aggregation properties of porphyrin dyes in water and generate supramolecular assembly; confirmed with two-photon cross-section enhancement and lifetime measurement study.
Series of Well-defined Block Copolymer based Metal-chelating Superparamagnetic Nanocomposite Formation: Well-defined diblock copolymers containing metal-coordinating ligands were synthesized by ROMP.
Stable maghemite-polymer nanocomposites were generated by in-situ process.
Chemical, surface-structure and magnetic properties were measured for potential biomimetic and MRI applications.
TECHNICAL EXPERTISE.
Experienced in multi-step wet-chemical synthesis, formulation of polymers, nanomaterials and surface functionalization.
Plastics processing, polyolefins and other thermoplastics, Extruder, Injection mold, color matching, masterbatches, molded plastics for consumer goods.
Synthesis of small molecules, functionalized well-defined organic block copolymers prepared by living controlled polymerization (ROMP), nanocomposites, fluorescent dyes, bioconjugation.
Colloid based synthesis of precise nanocatalysts using 'lab-on-a-chip (millifluidic)' devices supported by COMSOL and in-situ characterization with X-ray Absorption Spectroscopy (XAS) technique.
Synthesis of Inherently Conducting Polymers (ICP), In-situ oxidative polymerization and surface chemistry.
Hands on experience with various conductive materials and surface coating technology: Layer-by-layer self-assembly process, screen printing, dip, spray coat, padding.
Handling of air and water sensitive chemicals under inert atmosphere (Glove-Box, Schlenk line), proficient in various purification (chromatography) and separation techniques.
Proficient in materials characterizations and analysis using.
NMR, FTIR, TGA, DSC, GPC (SEC), MALDI-TOF, GC-MS.
Spectroscopy: UV-Vis, fluorescence (Quantum yield, life- time decay study), photostability.
Structure- property analysis of nanostructured material using TEM, DLS, SEM, XRD, XPS, XAS.
Electrical properties measurement using 4-point probe (surface, volume resistance) and data analysis.
Familiarity with Two- photon cross-section study and analysis, cell viability assay, fluorescence microscopy, magnetic properties measurement using MPMS (SQUID).
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