Prof. Papia Chowdhury

Education

M.Sc. (Physics) ,Ph.D.(Physics)

Biography

Dr. Papia Chowdhury is Professor in the Department of Physics. She has done her M.Sc. from Department of Physics Jadavpur University and PhD Physics (Molecular Spectroscopy) from Indian Association for the Cultivation of Sciences, Kolkata. During her doctoral research period her research interest was on the outcome of photo dynamics of some industrially applicable organic bi-chronophers in different environments including some organized assemblies. After doctoral study she has started research collaboration with various research groups of India and abroad like Indian Association for the Cultivation of Sciences (IACS), Jawaharlal Nehru Centre Advanced Scientific Research (JNCASR), Bangalore, BITS, Department of Physics, Department of Botany Guwahati University, Freie University, Berlin, Germany etc. She has also started collaboration with Industry like Hind High Vacuum Pvt. Ltd Bangalore and Bruker India Scientific Ltd, Kolkata etc.

At present she is working on Synthesis and characterization of different caped and uncapped Quantum dots (organic and inorganic based), Fluorescent Sensors, Opto Chemical Sensors in terms of their applicability for the detection of environmentally hazardous metal ions; Quantum dots as markers for medical imaging specially for cancer cells; Spectroscopy (UV-VIS, IR, Raman) of Charge Conduction in Nano Cavities and Nano-assemblies, Organic solar cells, OLED; Superionic Phase Transition, Molecular modelling, Molecular Dynamics Simulation forDrug Designing etc.

Professional achievement

Prof Chowdhury has published more than 95 peer reviewed papers in reputed international journals and several papers in international/national conferences. Her publications have received more than 1190 citations. Her h-index is 19 and i10-index is 38 (source: Google scholar). She has organized and attended several international/national conferences/workshops and presented her research work there. She has completed one DST funded project and one  DRDO project. She has one ongoing research project from Industry (KFCL)Prof. Chowdhury has refereed for several journals of international repute, e.g., Journal of Physical Chemistry, Chemical Physics Letters, Langmuir, Sensors & Actuators Reports, B, Molecular Physics, Journal of Molecular modeling, Spectro chimica acta etc. She has guided 4 PhD students.  

Research Project

Project Title: “Design & Analysis of the Quantum Cryptographic Schemes that can be Implemented in the Metropolitan cities using Optical Resources”

• Project cost: Rs.  40.91 Lac
• Granting Agency: DRDO, India
• Status: Ongoing

Project Title: “Bistability due to intramolecular and intermolecular charge transfer in different environments”

• Project cost: Rs. 9.36 Lac
• Granting Agency: DST, New Delhi
• Status: Completed

Project Title: “Development of Nano fertilizers for Release of Micronutrients to Plant and Soil”

• Project cost: Rs.  20.1 Lacs
• Granting Agency: KFCL (Industry), India
• Status: Ongoing

Publications

International Journals

• S. Sharma and P. Chowdhury; Photoluminescent carbon quantum dots synthesized from Plumeria leaves as metal ion sensor; Bulletin of Materials Science. 47 (2024) 187. https://doi.org/10.1007/s12034-024-03273-6 (Indexed in Scopus, Springer; Impact Factor: 1.9)
• S. Sharma, P. Yadav, M. Rana, and P. Chowdhury; Reactivities of 4-amino salicylic acid and its ‘Green’inhibition into nano sized β-cyclodextrin for Anti-Tuberculosis drug delivery;Journal of Molecular Liquids, 410 (2024) 125611. https://doi.org/10.1016/j.molliq.2024.125611 (Indexed in Scopus, Elsevier; Impact Factor: 5.3)
• S. Sharma and P. Chowdhury; Tunable dual photoluminescence from synthesized urea-based carbon quantum dots: A DFT based simulation on structural insights; Optical Materials. 153 (2024) 115617. https://doi.org/10.1016/j.optmat.2024.115617 (Indexed in Scopus, Elsevier; Impact Factor: 3.8)
• S. Sharma, P. Yadav, and P. Chowdhury, Thioglycolic acid capped CdSe/ZnS quantum dot as fluorescent sensor for the detection of water-soluble hazardous heavy metal ions; Applied Physics A. 130 (2024) 1-12. https://doi.org/10.1007/s00339-024-07491-x (Indexed in Scopus, Elsevier; Impact Factor: 2.5)
• S. Lakhera, K. Devlal, M. Rana, N. Kanagathara, A. Dhanusha, T.S. Girisun, S. Sharma, P. Chowdhury; Two-photon absorption and optical limiting in 7-diethylamino-4-methyl coumarin; Journal of Photochemistry and Photobiology A: Chemistry. 447 (2024) 115216. https://doi.org/10.1016/j.jphotochem.2023.115216 (Indexed in Scopus, Elsevier; Impact Factor: 4.1).
• S. Lakhera, M. Rana, K. Devlal, S. Sharma, P. Chowdhury, V. Dhuliya, S. Panwar, L.P. Purohit, A. Dhanusha and T.S. Girisun; Exploring the nonlinear optical limiting activity of para-aminobenzoic acid by experimental and DFT approach; Journal of Photochemistry and Photobiology A: Chemistry, 444 (2023) 114987. https://doi.org/10.1016/j.jphotochem.2023.114987” . (Indexed in Scopus, Elsevier; Impact Factor: 4.1).
• M. Rana, P. Yadav, and P. Chowdhury; DFT investigation of nonlinear optical response of organic compound: acetylsalicylic acid; International Journal of Materials Research. 114 (2023) 527-535. https://doi.org/10.1515/ijmr-2021-8732 . (Indexed in Scopus, De Gruyter , Impact Factor: 0.8)
• S. Sharma and P. Chowdhury; Fluorescence signal from carbon quantum dots synthesized from natural resources; Materials Today: Proceedings. (Online, 10th April, 2023). https://doi.org/10.1016/j.matpr.2023.05.676 . (Indexed in Scopus, Elsevier; Cite Score: 3.2).
• S. Singh, P. Chowdhury, A. Ghosh, S. Nara; Virtual screening of truncated single stranded DNA aptamers for Staphylococcal enterotoxin type A; Journal of Biomolecular Structure and Dynamics; (2023). [Index in scopus, Impact factor: 5.235]. https://doi.org/10.1080/07391102.2022.2164057
• P. Yadav, P. Chowdhury;Effectivity of repurposed drugs against SARS-CoV-2 infections, A hope for COVID 19: inhibitor modelling studies by docking and molecular dynamics; Heliyon (Cell Press) 8, (2022), e12327.[Index in scopus, Impact factor: 3.776].https://doi.org/10.1016/j.heliyon.2022.e12327
• P. Yadav, P. Chowdhury;Optical efficiency of CdTe QDs for metal ion sensing in the presence of different thiol-based capping agents; Chemical Papers (2022), 1-18.[Index in scopus, Impact factor: 2.09].
• S. Lakhera, K. Devlal, A.Ghosh, P. Chowdhury, M. Rana;  Modelling the DFT structural and reactivity study of feverfew and evaluation of its potential antiviral activity against COVID‑19using molecular docking and MD simulations; Chemical Papers (2022), doi.org/10.1007/s11696-022-02067-6; [Index in scopus, Impact factor: 2.09].
• P. Yadav, M. Rana, P. Chowdhury,DFT and MD simulation investigation of favipiravir as an emerging antiviral option against viral protease (3CLpro) of SARS-CoV-2. Journal of molecular structure,1246 (2021) 131253.https://doi.org/10.1016/j.molstruc.2021.131253. [Index in scopus, Impact factor: 3.196].
• M. Smitha, Y. Sheena Mary, Y. Shyma Mary, Goncagül Serdaroglu, P. Chowdhury, M. Rana, H. Umamahesvari, B. K. Sarojini, B. J. Mohan, Rani Pavithran, Modeling the DFT structural and reactivity studies of a pyrimidine-6-carboxylate derivative with reference to its wavefunction-dependent, MD simulations and evaluation for potential antimicrobial activity. Journal of Molecular Structure,1237 (2021) 130397. https://doi.org/10.1016/j.molstruc.2021.130397. [Index in scopus, Impact factor: 3.196].
• M. Rana, C.Banerjee, P. Chowdhury, Studies on optical signal due to oxygen effect on hydrogenated amorphous/crystalline silicon thin films, Applied Physics A, 127, 3 (2021) 1-8.https://doi.org/10.1007/s00339-021-04322-1.[Index in scopus, Impact factor: 2.584].
• Pooja, P. Chowdhury; Functionalized CdTe fluorescence nanosensor for the sensitive detection of water borne environmentally hazardous metal ions; Optical Materials (2020),https://doi.org/10.1016/j.optmat.2020.110584 .[Index in scopus, Impact factor: 2.799].
• P. Chowdhury;P. Pathak ;  Neuroprotective immunity by essential nutrient “Choline” for the prevention of SARS CoV2 infections: An in silico study by molecular dynamics approach; Chemical Physics Letters (2020), 761, 138057,  https://doi.org/10.1016/j.cplett.2020.138057. [Index in scopus, Impact factor: 2.903].
• H. Bhatt; T. Bhatt; T. Pant; C. Ch. Dhondiyal; M. Rana; P. Chowdhury; G. C. Joshi; P. Arya; H. Tiwari; Computational study of the intermolecular interactions and their effect on the UV-visible spectra of the ternary liquid mixture of benzene, ethanol and propylene glycol; Journal of Molecular Modeling (2020), 26,268; https://doi.org/10.1007/s00894-020-04533-y; .[Index in scopus, Impact factor: 1.989].
• P. Chowdhury; In silico investigation of phytoconstituents from Indian medicinal herb ‘Tinospora cordifolia (giloy)’ against SARS-CoV-2 (COVID-19) by molecular dynamics approach; Journal of Biomolecular Structure and Dynamics; (2020); https://doi.org/10.1080/07391102.2020.1803968, .[Index in scopus, Impact factor: 3.220].
• Pooja, P. Chowdhury; Optical and electronic properties of CdTe quantum dots in their freezed solid matrix phase and solution phase; Materials Today: Proceedings; (2020); 28, 201-204; https://doi.org/10.1016/j.matpr.2020.01.561, .[Index in scopus, Cite Score: 1.3].
• M. Rana; P. Chowdhury; Nonlinear optical responses of organic based indole derivative: An experimental and computational study; Materials Today: Proceedings; (2020); 28, 241-245; https://doi.org/10.1016/j.matpr.2020.01.598 .[Index in scopus, Cite Score: 1.3].
• M. Rana, A. Jain, V. Rani, P. Chowdhury; Glutathione capped core/shell CdSeS/ZnS quantum dots as a medical imaging tool for cancer cells; Inorganic Chemistry Communications (2020), 112, 107723 .[Index in scopus, Impact factor: 1.794].
• M. Rana, P. Chowdhury; Studies on Size Dependent Structures and Optical Properties of CdSeS Clusters; Journal of Cluster Science (2020), https://doi.org/10.1007/s10876-019-01719-0.[Index in scopus, Impact factor: 2.15].56
• Pooja, M, Rana.M, P. Chowdhury; Optical and Structural Investigation of CdTe Quantum Dots in Freezed Solid Phase Between PVA Polymer Matrix; AIP Conference Proceedings,(2020), (in press) .[Index in scopus, Impact factor: 0.40].
• Rana.M, Chowdhury, P, L-glutathione capped CdSeS/ZnS quantum dot sensor for the detection of environmentally hazardous metal ions; J of Luminescence, (2019), Vol 206. https://www.sciencedirect.com/science/article/pii/S0022231318303028?via%.... 105-112 [Index in scopus, Impact factor: 2.367].
• Bhardwaj. S , Pal. A , Chatterjee. K, H Rana. T. H ,Bhattacharya. G, Sinha Roy. S, Chowdhury. P, Sharma. G. D, Biswas. S; Fabrication of efficient dye-sensitized solar cells with photoanode containing TiO₂–Au and TiO₂–Ag plasmonic nanocomposites,J Mat Science: Materials in Electronics(2018), 29, 21, 18209-18220,  DOI : 10.1007/s10854-018-9934-y.[Index in scopus].
• Bhardwaj. S , Pal. A , Chatterjee. K, H Rana. T. H ,Bhattacharya. G, Sinha Roy. S, Chowdhury. P, Sharma. G. D, Biswas. S; Enhanced efficiency of PbS quantum dot-sensitized solar cells using plasmonic photoanode. J Nanopart Res, (2018), 20, 198-213 https://doi.org/10.1007/s11051-018-4301-8. [Index in scopus,].
• Bhardwaj. S , Pal. A , Chatterjee. K, H Rana. T. H ,Bhattacharya. G, Sinha Roy. S, Chowdhury. P, Sharma. G. D, Biswas. S, “Significant enhancement of power conversion  efficiency of dye-sensitized solar cells  by the incorporation of TiO₂–Au nanocomposite in TiO₂ photoanode” J. Materials Sci, (2018) https://doi.org/10.1007/s10853-018-2156-0.[Index in scopus,].
• Rana.M, Chowdhury.P, “Understanding of Size Dependent Properties of CdTe Nanoclusters” AIP Conference Proceedings,(2018), 020054; doi: 10.1063/1.5052123, [Index in scopus,].
• Rana.M, Chatterjee. A,Chowdhury.P., “Investigation of Non Linear Optical Properties of Organic Based Di Amine Substituted Tetraphenylethylene”. AIP Conference Proceedings,(2018), 020055; doi: 10.1063/1.5052124, [Index in scopus,].
• Rana, M., & Chowdhury, P. (2017). Perturbation of hydrogen bonding in hydrated pyrrole-2-carboxaldehyde complexes. J. Molecular Modelling (Springer) 23, 216, DOI 10.1007/s00894-017-3380-2.
• Rana, M., & Chowdhury, P. (2017). Effects of hydrogen bonding between pyrrole-2-carboxaldehyde and nearest polar and nonpolar environment. Spectrochimica Acta A. Molecular and Biomolecular Spectroscopy. 185,  198–206.
• Rana, M., Singla, N., Pathak, A., Dhanya, R., Narayana, C., & Chowdhury, P. (2017). Vibrational-electronic properties of intra/inter molecular hydrogen bonded heterocyclic dimer: An experimental and theoretical study of pyrrole-2-carboxaldehyde. Vibrational Spectroscopy, 89, 16-25.
• Rana, M., Singla, N., Chatterjee, A., Shukla, A., & Chowdhury, P. (2016). Investigation of nonlinear optical (NLO) properties by charge transfer contributions of amine functionalized tetraphenylethylene. Optical Materials, 62, 80-89.
• Singla, N., Tripathi, A., Rana, M., Goswami, S. K., Pathak, A., & Chowdhury, P. (2015). “Turn on/off” proton transfer based fluorescent sensor for selective detection of environmentally hazardous metal ions (Zn²⁺, Pb²⁺) in aqueous media. Journal of Luminescence, 165, 46-55.
• Singla, N., & Chowdhury, P. (2014). Nature of stokes shifted dual fluorescence in 2-acetyl-pyrrole: Tuning between intramolecular hydrogen bonding and ESIPT pathways. Chemical Physics Letters, 612, 25-32.
• Singla, N., & Chowdhury, P. (2014). Inclusion behaviour of Indole-7-Carboxaldehyde inside β-cyclodextrin: A nano cage. Chemical Physics, 441, 93-100.
• Singla, N., Bhadram, V. S., Narayana, C., & Chowdhury, P. (2013). White Light Generation by Carbonyl Based Indole Derivatives Due to Proton Transfer: An Efficient Fluorescence Sensor. The Journal of Physical Chemistry A, 117(13), 2738-2752.
• Singla, N., Kumar, R., Pathak, A., & Chowdhury, P. (2013). Excited state behavior of Pyrrole 2-carboxyldehyde: Theoretical and experimental study. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 112, 125-131.
• Singla, N., & Chowdhury, P. (2013). Density functional investigation of photo induced Intramolecular Proton Transfer (IPT) in Indole-7-carboxaldehyde and its experimental verification. Journal of Molecular Structure, 1045, 72-80.
• Singla, N., & Chowdhury, P. (2012). Role of hydrogen bonding in excited state intramolecular proton transfer of Indole-7-Carboxaldehyde: A theoretical and experimental study. Chemical Physics Letters, 548, 71-79.
• Swain, D., Bhadram, V. S., Chowdhury, P., & Narayana, C. (2011). Raman and X-ray Investigations of Ferroelectric Phase Transition in NH₄HSO₄. The Journal of Physical Chemistry A, 116(1), 223-230.
• Chowdhury, P., Adhikary, T. P., & Chakravorti, S. (2008). Exploring anionic emission of 2-benzoyl benzimidazole in micellar environments. Journal of Luminescence, 128(7), 1113-1120.
• Kumar, N., Chakravorti, S., & Chowdhury, P. (2008). Experimental investigation by UV–VIS and IR spectroscopy to reveal electronic and vibrational properties of pyrrole-2-carboxyldehyde: A theoretical approach. Journal of Molecular structure, 891(1), 351-356.
• Sahoo, D., Adhikary, T., Chowdhury, P., Roy, S. C., & Chakravorti, S. (2008). Understanding the photophysics of 4-nitro-1-hydroxy-2-naphthoic acid: A controlled excited state proton transfer. Chemical Physics, 352(1), 175-184.
• Sahoo, D., Adhikary, T., Chowdhury, P., & Chakravorti, S. (2008). Theoretical study of excited state proton transfer in pyrrole-2-carboxylic acid. Molecular Physics, 106(11), 1441-1449.
• Adhikary, T. P., Chowdhury, P., & Chakravorti, S. (2007). Modulation of photophysics of 2-hydroxy 1-naphthaldehyde in non-ionic micelles. Chemical physics letters, 442(4), 504-510.
• Chowdhury, P., & Chakravorti, S. (2006). Effect of pH in the photophysics of 2-hydroxy 1-naphthaldehyde in micellar systems. Journal of Photochemistry and Photobiology A: Chemistry, 179(1), 95-104.
• Chowdhury, P., Panja, S., Chatterjee, A., Bhattacharya, P., & Chakravorti, S. (2005). pH-Dependent excited-state proton transfer characteristics in 2-acetyl benzimidazole and 2-benzoyl benzimidazole in aqueous and non-aqueous media. Journal of Photochemistry and Photobiology A: Chemistry, 173(1), 106-113.
• Chowdhury, P., Panja, S., Chatterjee, A., Bhattacharya, P., & Chakravorti, S. (2005). Prototropism in 2-acetyl benzimidazole and 2-benzoyl benzimidazole. Journal of Photochemistry and Photobiology A: Chemistry, 170(2), 131-141.
• Chowdhury, P., Adhikary, T. P., & Chakravorti, S. (2005). Effect of additives on the photophysics of 2-acetyl benzimidazole and 2-benzoyl benzimidazole encapsulated in cyclodextrin cavity. Journal of Photochemistry and Photobiology A: Chemistry, 173(3), 279-286.
• Panja, S., Chowdhury, P., & Chakravorti, S. (2004). Modulation of complexation of 4 (1H-pyrrole 1-yl) benzoic acid with β-cyclodextrin in aqueous and non-aqueous environments. Chemical physics letters, 393(4), 409-415.
• Panja, S., Chowdhury, P., & Chakravorti, S. (2003). New 1: 1: 1 complex with N-phenyl pyrrole and nano-cavities. Chemical physics letters, 368(1), 27-35.
• Panja, S., Chowdhury, P., & Chakravorti, S. (2003). Exploring the location and orientation of 4-(N, N-dimethylamino) cinnamaldehyde in anionic, cationic and non-ionic micelles. Chemical physics letters, 368(5), 654-662.
• Chowdhury, P., Panja, S., & Chakravorti, S. (2003). Excited state prototropic activities in 2-hydroxy 1-naphthaldehyde. The Journal of Physical Chemistry A, 107(1), 83-90.

National Journals

• Bhardwaj. S., Pal, A., Chatterjee,Chowdhury, P., Saha, S., Barman, A., Rana, H. T., Sharma, G. D. & Biswas, S. (2017). Electrophoretic deposition of plasmonic nanocomposite for the fabrication of dye-sensitized solar cells. Indian Journal of Pure & Applied Physics (IJPAP), 55(01), 73-80.
• Rana, M., & Chowdhury, P. (2015)L-glutathione Capped CdSeS/ZnS Quantum Dots as an Environmentally Hazardous Chemical SensorJ. Basic & Applied Eng Res, 2, 1319-1321.
• Tomar, V., & Chowdhury, P. (2015) Inculsion behaviour of Organic Probe inside Micellar Nano Cavity in Polymer Phase J.Mech & Material Sci Eng Res.2(10), 74-76.
• Rana, M., & Chowdhury, P. (2016). Micellar systems: Novel family for drug carriers., AIP Conference Proceedings,AIP Publishing, 1731, 050083.

Book Published

• Pooja, Rana M., Chowdhury P.,“Modern application of quantum dots: Environmentally hazardous metal ion sensing and medical imaging”, Handbook of nanomaterials for sensing application, pp. 465-505, 2021,Published byElsevier, ISBN 9780128207833.https://doi.org/10.1016/B978-0-12-820783-3.00025-7.
• Chakravorti, S., Chowdhury, P. &Adhikary. T. (2007). Characterization of two substituted benzimidazoles as potential excited state proton transfer system along with modulation of their photophysical properties in different media including nano-cavity and microheterogenious systems at different pH. ‘Photo/Electro chemistry and Photobiology in the Environment, Energy and Fuel, Ed. S. Kaneco, Research Signpost, Trivandrum, India, pp. 141-176

International Conference

• P. Chowdhury;Nonlinear optical (nlo) effects of amine functionalized organic based tetraphenylethylene; ICOPVS-2020, 24-29 February, 2020, JNCASR, Bangalore, India.
• P. Chowdhury; Applicability of Quantum Dots in Freezed Solid Matrix phase for the Biomedical Industry; Ind0 Brazilian e-Symposium on Solid State Properties of Pharmaceuticals -2020; 29-30 April, 2020, Lucknow University, India.

• Pooja, Rana.M, Chowdhury, P; Influence of size and shape of optical and electronic properties of CdTe quantum dots in aqueous; International Conference on Photonics, Metamaterials and Plasmonics (PMP-2019), Paper ID: PT-6, pp. 100, Jaypee Institute of Information Technology Noida, India, 14-16 February 2019.
• Rana.M, Pooja, Chowdhury, PInvestigation on Nonlinear Optical Responses of Different Pyrrole Derivatives: A  Computational Study; International Conference on Photonics, Metamaterials and Plasmonics (PMP-2019), Paper ID: PT-5, pp. 100, Jaypee Institute of Information Technology Noida, India, 14-16 February 2019.
• Chowdhury.P;  Optical sensing of environmentally hazardous heavy metals (Cr3+, Pb2+, Zn2+) and cancerous cells by functionalized core/shell quantum dot (Invited Talk); International Symposium on Molecular Spectroscopy; University of Illinois, USA from June 18-22, 2018.
• Chowdhury, P. (2017).Applicability of organic materials for optical information processing due to their high nonlinear optical activity, International conference on advances in plant and microbial biotechnology (PMB2017), JIIT, Noida, India.
• Rana, M. & Chowdhury, P. (2016).Effects of intermolecular hydrogen bonding between Pyrrole-2-carboxyldehyde with its nearest hydroxylic environment, International conference on Prespectives of Vibrational Spectroscopy (ICOPVS 2016), Lucknow, India.
• Chowdhury, P. (2016).Nonlinear Optical (NLO) Properties by Vibrational spectroscopy International conference on Prespectives of Vibrational Spectroscopy (ICOPVS 2016), Lucknow, India.
• Rana, M. & Chowdhury, P. (2015).L-glutathione capped CdSeS/ZnS Quantum Dots as an environmentally hazardous chemical sensor, International Conference on Basic and Applied Engineering Research, JNU, New Delhi.
• Tomar, V., & Chowdhury, P. (2015). Inculsion behaviour of Organic Probe inside Micellar Nano Cavity in Polymer Phase J. Mech & Material Sci Eng Res., JNU, New Delhi.
• Rana, M. & Chowdhury, P. (2015). Inclusion behaviour of Pyrrole-2-Carboxyldehyde (anti cancerous drug) in micellar system” International conference on Nanostructued Materials and Nanocomposites (ICNM 2015), Hindustan College of Science & Technology, Mathura, India.
• Chowdhury, P. (2015). Complexation of bioprobe inside nano structured   (α-, β-, γ-) Cyclodextrin cavities, Biomolecules and Nanomaterials 5, Polish Academy of Sciences,Poland.
• Chowdhury, P. (2015). Complexation of Indole based Chemotherapic drug inside nano sized Cyclodextrin cage, International Conference on Nanomaterials (ICNM 2014), Mahatma Gandhi University.
• Singla, N. & Chowdhury, P. (2013). Environmentally hazardous metal ion fluorescence sensor based on ESIPT systems, International Conference on Multi-functional Materials, Energy and Environment, Sharda University.
•  Singla, N.  Bhadram, V. S., Narayana, C. & Chowdhury, P. (2012). Hydrogen bonded Molecular Network of Indole-7-Carboxaldehyde: Combined Optical (NMR, Raman) and Electrical studies, International conference Chemical Constellation Cheminar – 2012 (CCC-2012), India.
• Swain, D. Bhadram, V. S., Chowdhury, P., Narayana, C. & Rao, C. N. R. (2011). Phase transition in NH₄HSO₄ sandwiched by KHSO_4”; INDO-US Meeting on New Functional Materials: Synthesis, Properties and Methods, Manali, Himachal Pradesh, India.
• Singla, N. & Chowdhury, P. (2011). Raman scattering, a technique to identify quantum molecular network, International Conference on Quantum optics and quantum computing,JIIT, Noida, India.
• Chowdhury, P., Swain, D. Bhadram, V. S., Narayana, C. & Rao, C. N. R. (2010). Successive Phase Transitions in NH₄HSO₄, International Conference on Quantum Effetcs in Solids of Today (I-ConQuEST), National Physical Laboratory, New Delhi, India.
• Chowdhury, P. (2010). Spectroscopy in UV-VIS and IR region in different environment, Proceedings of 11^th International Conference on Public Communication of Science & Technology (PCST-2010), New Delhi, India.
• Chowdhury, P. (2008). Intramolecular and Intermolecular Charge Transfer Spectroscopy in UV-VIS and IR Region in Different Environment, 17^th International Conference on Photochemical Conversion and Storage of Solar Energy, 27^th July-1^st August, 2008, Sydney, Australia.
• Kumar, N. & Chowdhury, P. (2008). Excited State Intramolecular and Intermolecular Proton Transfer Spectroscopy in UV-VIS Region for Solution Phase in Different Environment, Trombay Symposium on Radiation and PhotoChemistry (TSRP2008), Pune, India.
• Chowdhury, P., Adhikari, T. P. & Chakravorti, S. (2007). Excited State Intramolecular and Intermolecular Proton Transfer Spectroscopy in UV-VIS Region for Solution Phase. Session 2: Molecular Spectrometryof the Colloquium Spectroscopicum Internationale XXXV (CSI XXXV), Xiamen, China.
• Chowdhury, P., & Chakravorti, S. (2007). Photophysical and Photochemical Effects destabilize Benzimidazole Moiety which directly affects stability of Human DNA”. 2ⁿ European Conference on Chemistry for Life Science. Wroclaw Poland.
• Srivastava, S. & Chowdhury, P. (2007). Designing Safe Sweeteners: A Photochemical Study of Sweet Proteins/ Molecules, International Conference on Frontiers of Radiation and Photochemistry, Kerela,India.
• Chowdhury, P., Adhikari, T. P. & Chakravorti, S. (2007). Dynamics of Excited State Intramolecular and Intermolecular Proton Transfer in   Solution Phase in Different Environment, International Conference on Frontiers of Radiation and Photochemistry, Kerela,India.
• Chowdhury, P., &Chakravorti, S. (2006). Radiation effects on the stability of Benzimidazole, which directly affects the stability of Human DNA. First Asia-Pacific Symposium on Radiation Chemistry (APSRC), Shanghai, China.
• Chowdhury, P., &Chakravorti, S. (2004).  Excited State Prototropism in 2-Acetyl bezimidazole and 2-Benzoyl benzimidazole, Proceeding of Trombay Symposium on Radiation and Photochemistry (TSRP-2004), Mumbai, India.
• Panja, S., Chowdhury, P., &Chakravorti, S. (2002). “Dual emission of 4-(N,N-dimethylamino) cinnamaldehyde in cationic, anionic and non-ionic micelle”. Third Asian Photochemistry Conference (APC-2002), Mumbai, India.

National Conference

• Rana.M, Chowdhury.P, Theoretical Calculation for Size Dependent Properties of CdTe QD Clusters (Best poster), National Conference on Advanced Materials and Nanotechnology, Jaypee Institute of Information Technology, Noida, March 15-17, (2018).
• Rana.M, Chowdhury.P, Investigation of non linear optical properties of organic based di amine substituted tetraphenylethylene (Poster presentation), National Conference on Advanced Materials and Nanotechnology, Jaypee Institute of Information Technology, Noida, March 15-17, (2018).
• Rana, M. & Chowdhury, P. (2016).Detection of hazardous heavy metal ions in Himalayan region by using CdSeS/ZnS quantum dots based chemical sensor, 86^th Annual Symposium of The National Academy of Science India (NASI), UCOST Dehradun, India.
• Chowdhury, P.(2016). Detection of environmentally hazardous heavy metal (Cr³⁺) by functionalized core/shell (CdSeS/ZnS) quantum dot, National Conference on Nanoscience, Nanotechnology and Advanced Materials (NCNNAM- 2016), Bits Mesra, Ranchi, India.
• Rana, M.  & Chowdhury, P. (2016). Functionalized CdSeS/ZnS quantum dots based luminescence probe for detection of heavy metal ion (Cr³⁺) National Symposium on Nanobiotechnology“ (BIOTIKOS 2016), TERI University, New Delhi.
• Chowdhury, P.(2015). Turn on/off proton transfer based fluorescent opto chemical sensor for detection of environmentally hazardous metal ions. National conference on new frontiers in chemistry from fundamentals to applications (NFCFA2015), BITS Pilani, Goa, India.
• Rana, M. & Chowdhury, P. (2015). Micellar systems:Novel family for drug carrier 60^th DAE Solid State Physics Symposium (DAE-SSPS-2015) Amity University, Noida, India.
• Tripathi, A., Singla, N. &Chowdhury, P. (2014).Polymer based Organic Light    Emitting Nano Material as Chemical Sensor: A Futuristic Application,National Conference on Nanotechnology and Renewable Energy (NCNRE), Jamia Milia University, Delhi.
• Tripathi, A., Singla, N. &Chowdhury, P. (2014).Polymer based optochemical sensor, Multi-disciplinary National Conference SCIENCE COLLOQUIUM: Emerging trends in basic and applied Sciences, DAV College Jalandhar, India.
• Singla, N. andChowdhury, P. (2011). Phases of nano sized pyrrole-2-carboxyldehyde in different environments: an experimental and theoretical study”, National workshop on nanotechnology for defence applications, in Solid state physics laboratory, Delhi.
• Chowdhury, P., Adhikari, T. P. andChakravorti S. (2006). Effect of environment on the photophysics of DNA constituent Benzimidazole”,National Symposium On Spectroscopy and its Application (NSSA-2006) IACS, Kolkata, India.
• Chowdhury, P. andChakravorti S. (2003). Ultrafast process in 2-Hydroxy 1-Naphthaldehyde. National Symposium on Radiation and Photochemistry (NSRP-2003), Kanpur, India.