Physics

Head of Department

Dr. Tribedi Bora
Ph.D(IIT Guwahati)

E-mail:
hod.ph@nitm.ac.in

Faculty

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Professor Ayon Bhattacharjee Professor

Ph.D, NEHU

ayonbh[at]nitm[dot]ac[dot]in
https://nitmeghalaya.irins.org/profile/48460

Research Interest

Liquid Crystals, Metal Oxide Semiconductors, Raman Spectroscopy

Education Qualification

Ph.D, NEHU

Publications



Exploring odd-even sensitivity in m.OnO.m liquid crystal compounds: A comprehensive study using DFT analysis (https://doi.org/10.1016/j.molliq.2024.124800) Journal of Molecular Liquids

Insights into the dynamic symphony: a comprehensive computational exploration of pure and fluorinated 6O.6 liquid crystals with the help of DFT analysis, Liquid Crystals (http://dx.doi.org/10.1080/02678292.2024.2344222.)

 

A Detailed Exploration of the Impact of Fluorination on Different Physical Properties in 5O.12 Schiff-based Liquid Crystal: A DFT Approach Chemical Physics Impact (https://doi.org/10.1016/j.chphi.2024.100596)

Theoretical Investigation of N (p-n alkyloxy benzylidene) p-n alkyl aniline Schiff-Based Liquid Crystal Molecule Physica B: Condensed Matter (https://doi.org/10.1016/j.physb.2024.415857)

 

A comparative DFT analysis of chiral laterally semi-fluorinated liquid crystals

O Khan, S Gandhi, D Gupta, A Bhattacharjee, Physica Scripta 99 (2), 025983, 2024


Quantum Mechanical Density Functional Approach for the Studies of Nonlinear Optical and Reactivity Parameter of 5O.5 NanoWorld  Journal (https://doi.org/10.17756/nwj.2023-s5-044) (Conference Paper)


Optical, Impedance, and DFT Study of Ternary SnO2-Fe-Cu Nanoparticles, SP Choudhury, N Sharma, BB Narzary, N Kumari, PK Sarkar, Ayon Bhattacharjee, ECS Journal of Solid State Science and Technology 12 (10), 103013, 2023

Exploring odd-even sensitivity in m.OnO.m liquid crystal compounds: A comprehensive study using DFT analysis (
https://doi.org/10.1016/j.molliq.2024.124800)
Insights into the dynamic symphony: a comprehensive computational exploration of pure and fluorinated 6O.6 liquid crystals with the help of DFT analysis (http://dx.doi.org/10.1080/02678292.2024.2344222.)

A Detailed Exploration of the Impact of Fluorination on Different Physical Properties in 5O.12 Schiff-based Liquid Crystal: A DFT Approach (https://doi.org/10.1016/j.chphi.2024.100596)

Theoretical Investigation of N (p-n alkyloxy benzylidene) p-n alkyl aniline Schiff-Based Liquid Crystal Molecule (https://doi.org/10.1016/j.physb.2024.415857)

Quantum Mechanical Density Functional Approach for the Studies of Nonlinear Optical and Reactivity Parameter of 5O.5 Liquid Crystal (https://doi.org/10.17756/nwj.2023-s5-044)

Comparative studies of DFT and experimental Raman spectra of pure 5O. 14 liquid crystalline compound
D Bhattacharjee, PR Alapati, A Bhattacharjee, Liquid Crystals, 1-10, 2023

Observation of new mesophases and detailed QM analysis of terephthalylidene-bis-[4-n-decylaniline] liquid crystal molecule
D Gupta, P Kalita, A Bhattacharjee, Journal of Molecular Structure 1269, 133815, 2022

Interactions of a biological macromolecule with thermotropic liquid crystals: Applications of liquid crystals in biosensing platform P Kalita, RK Singh, A Bhattacharjee, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 278, 121347, 2022

Detection of human serum albumin by room temperature nematic liquid crystals based on polarising microscopy, molecular docking and Raman spectroscopy, P Kalita, A Bhattacharjee, Liquid Crystals 49 (6), 886-898, 2022

Interactions investigated by the spectroscopic, microscopic and molecular docking studies for liquid crystal-based biosensor
P Kalita, RK Singh, A Bhattacharjee, Liquid Crystals 49 (3), 297-311, 2022

Thermotropic liquid crystals in the detection of albumins through a microscopic, spectroscopic and computational approach
P Kalita, RK Singh, A Bhattacharjee, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 265, 120374, 2022

Enhanced blue-shift of the optical band gap in Cd-doped ZnO nanoparticles, A Ghosh, N Kumari, SP Choudhury, S Tewari, A Bhattacharjee, Materials Today: Proceedings 68, 215-222, 2022

Potential liquid crystal-based biosensor depending on the interaction between liquid crystals and proteins
P Kalita, SS Shukla, RK Singh, A Bhattacharjee, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 254, 119634, 2021

Investigation of a partially fluorinated chiral antiferroelectric liquid crystalline material with large negative dielectric anisotropy, D Gupta, P Kula, A Bhattacharjee, Journal of Molecular Liquids 331, 115704, 2021

Detailed analysis of a room temperature antiferroelectric liquid crystalline material forming polar mesophases
D Gupta, P Kula, A Bhattacharjee, Journal of Molecular Liquids 327, 114859, 4, 2021

Computational, dielectric and electro-optical analysis of an orthoconic antiferroelectric mesogen having superstructure in its reduced symmetry phase, D Gupta, P Kula, A Bhattacharjee, Ferroelectrics 572 (1), 258-276, 2021

Mesomorphic, electro-optic and dielectric behaviour of a semi-fluorinated chiral liquid crystalline material forming polar smectic phases, D Gupta, P Kula, A Bhattacharjee, Journal of Molecular Structure 1219, 128557, 2020

Detailed investigation of N-(4-n-pentyl-oxybenzylidene)-4?-n-hexylaniline liquid crystal molecule
D Gupta, A Bhattacharjee, Journal of Molecular Structure 1196, 66-77, 2019

Comparative Raman study of two laterally fluorinated LC compounds having different terminal chains
M Lyndem, R Dabrowski, A Bhattacharjee, Liquid Crystals 46 (7), 1145-1155, 2019

Raman and FTIR Study of a 2, 3'-difluoro-4''-isothiocyanato-4-propyl-1, 1': 4', 1''-terphenyl compound or C3P (3F) P (3F) P-NCS
M Lyndem, A Bhattacharjee, R Dabrowski, Molecular Crystals and Liquid Crystals 681 (1), 45-57, 2019

Experimental and DFT generated Raman study of two bent-core monomeric liquid crystalline compounds
D Bhattacharjee, R Mishra, R Dabrowski, A Bhattacharjee, Liquid Crystals 46 (3), 367-375, 2019

Temperature-dependent Raman study of pure and silver nanoparticles dispersed N-(4-n-heptyloxybenzylidene)-4’-n-butylaniline (7O. 4), R Mishra, A Bhattacharjee, D Bhattacharjee, KN Singh, PR Alapati, Liquid Crystals 46 (3), 327-339, 2019

Birefringence, polarizability order parameters and DFT calculations in the nematic phase of two bent-core liquid crystals and their correlation, D Bhattacharjee, TK Devi, R Dabrowski, A Bhattacharjee, Journal of Molecular Liquids 272, 239-252, 2018

Sensing of ammonia gas by undoped and aluminum-doped tin oxide nanoparticles by Raman spectroscopy
K Bhuyan, A Bhattacharjee, PR Alapati, Pramana 91 (3), 32, 2018

Temperature-dependent vibrational spectroscopic studies of pure and gold nanoparticles dispersed 4-n-Hexyloxy-4’-cyanobiphenyls, R Mishra, A Bhattacharjee, D Bhattacharjee, KN Singh, B Gogoi, P R Alapati, Liquid Crystals 45 (9), 1333-1341, 2018

HUMIDITY-DEPENDENT IMPEDANCE AND DFT ANALYSIS OF PURE AND Cu-DOPED SnO2 THIN FILMS, SP Choudhury, D Bhattacharjee, A Bhattacharjee, Surface Review and Letters 25 (05), 1850106, 2018

Theoretical investigation of nonlinear optical and vibrational properties of two liquid crystalline compounds, D Bhattacharjee, R Dabrowski, A Bhattacharjee, Journal of Molecular Liquids 255, 80-92 7, 2018

Comparative experimental optical studies on 7. O5O. 7 dimeric liquid crystal compound using theoretical models
D Bhattacharjee, PR Alapati, A Bhattacharjee, Liquid Crystals 45 (4), 586-592, 2018

Study of structural, electrical and optical properties of Ni-doped SnO2 for device application: experimental and theoretical approach, SP Choudhury, N Kumari, A Bhattacharjee, Journal of Materials Science: Materials in Electronics 28, 18003-18014, 2017

Study of the effect of temperature on the optical properties of a laterally Fluorinated LC compound, M Lyndem, R Dabrowski, A Bhattacharjee, Molecular Crystals and Liquid Crystals 658 (1), 81-91, 2017

Impedance Spectroscopy of Fe-Doped SnO2 Synthesized by Poly (ethyleneglycol) Assisted Chemical Co-Precipitation Method
SP Choudhury, K Bhattacharya, N Kumari, A Ghosh, A Bhattacharjee, Journal of Nanoscience and Nanotechnology 17 (8), 5453-5460, 2017

Sensing of 0.1 ppm of methanol, ethanol, and propanol vapors at 130°C by SnO2 thin film, SP Choudhury, A Bhattacharjee
Particulate Science and Technology 35 (3), 314-321, 2017

Electrical properties of interdigitated partially bent like shaped liquid crystalline compound, D Bhattacharjee, PR Alapati, A Bhattacharjee, Molecular Crystals and Liquid Crystals 648 (1), 66-76, 2017

Study of dielectric properties and the molecular dynamics using Raman spectroscopy in pure and nanoparticle doped liquid crystal compound, 6O. 4, B Gogoi, KN Singh, R Mishra, TK Ghosh, A Bhattacharjee, PR Alapati, Molecular Crystals and Liquid Crystals 646 (1), 3-13, 2017

Impedance Spectroscopy of Fe-Doped SnO, SP Choudhury, K Bhattacharya, N Kumari, A Ghosh45, A Bhattacharjee
Nanoscience and Nanotechnology 17, 1-8, 2017

Optical parameter measurements of a nO.m liquid crystalline compound, K Thingujam, A Bhattacharjee, B Choudhury, PR Alapati, NISCAIR-CSIR, India, 2017

Molecular polarization, order parameter and dielectric study of a dimeric compound, D Bhattacharjee, PR Alapati, A Bhattacharjee, Journal of Molecular Liquids 224, 507-514, 2016

Studies on frequency dependent electrical and dielectric properties of sintered zinc oxide pellets: effects of Al-doping
S Tewari, A Ghosh, A Bhattacharjee, Indian Journal of Physics 90 (11), 1247-1255, 2016

Birefringence and temperature-gradient refractive index study of a laterally Fluorinated Terphenyl LC compound.
M Lyndem, D Bhattacharjee, R Dabrowski, A Bhattacharjee, Journal of Physics: Conference Series 759 (1),  012016, 2016

Negative optical anisotropic behaviour of two higher homologues of 5O. m series of liquid crystals, D Bhattacharjee, PR Alapati, A Bhattacharjee, Journal of Molecular Liquids 222, 55-60, 2016

Optical studies of a binary liquid crystal mixture exhibiting induced smectic A phase, K Thingujam, A Bhattacharjee, B Choudhury, SD Sarkar, Applied Physics A 122, 1-10, 2016

Negative Birefringence in the Higher Homologs of the 5O.m Series of Liquid Crystals, D Bhattacharjee, PR Alapati, A Bhattacharjee, The Journal of Physical Chemistry B 120 (27), 6747-6753, 2016

Correlation between the density and refractive index with higher homologues 5O. m series, D Bhattacharjee, SP Choudhury, A Bhattacharjee, Molecular Crystals and Liquid Crystals 631 (1), 69-73, 2016

Methanol sensing by SnO2 pellets prepared by chemical route method, SP Choudhury, N Kumari, D Bhattacharjee, A Bhattacharjee, AIP Conference Proceedings 1728 (1), 2016

Dielectric relaxation and birefringence study of 7. O5O. 7 dimeric liquid crystal compound, D Bhattacharjee, S Paul-Choudhury, PR Alapati, A Bhattacharjee, AIP Conference Proceedings 1728 (1), 2016

Enhanced surface activity of SnO2 thin film verified by LM algorithm, SP Choudhury, N Kumari, A Bhattacharjee
Superlattices and Microstructures 92, 24-36, 2016

Nematic liquid crystals exhibiting high birefringence, K Thingujam, A Bhattacharjee, B Choudhury, R Dabrowski
Optical Review, 1-11, 2016

Nematic liquid crystals exhibiting high birefringence, RS D?browski, A Bhattacharjee, B Choudhury, K Thingujam
Optical Review 3 (23), 2016

Facile synthesis of SnO2 thin film by spray pyrolysis technique, investigation of the structural, optical, electrical properties
SP Choudhury, SD Gunjal, N Kumari, KD Diwate, KC Mohite, A. Bhattacharjee, Materials Today: Proceedings 3 (6), 1609-1619, 2016

Structural, electrical and optical studies on ruthenium doped ZnO pellets for device applications, A Ghosh, N Kumari, S Tewari, A Bhattacharjee, Materials Science and Engineering: B 196, 7-14 34, 2015

Density and phase transition study of the liquid crystal compound 50.16, D Bhattacharjee, A Bhattacharjee
AIP Conference Proceedings 1661 (1), 2015

Influence of Cu doping on the structural, electrical and optical properties of ZnO, Ayon Bhattacharjee ARINDAM GHOSH, NAVNITA KUMARI, Pramana 84 (4), 621-635, 2014

Investigation of structural and electrical transport mechanism of SnO2 with Al dopants, N Kumari, A Ghosh, A Bhattacharjee
Indian Journal of Physics 88, 1059-1066, 2014

Investigation of structural and electrical properties of CuO modified SnO2 nanoparticles, N Kumari, A Ghosh, A Bhattacharjee, Materials science in semiconductor processing 19, 114-123, 2014

Study of optical parameters of two fluorinated isothiocyanato nematic liquid crystals exhibiting high birefringence
TK Devi, B Choudhury, A Bhattacharjee, R Dabrowski, Opto-Electronics Review 22, 24-30, 2014

Comparative X-ray diffraction study of SnO2 nanoparticle samples from different precursor solutions, SP Choudhury, N Kumari, A Bhattacharjee, Cell 69, 71-281, 2014

Investigations on structural and optical properties of Cu doped ZnO, A Ghosh, N Kumari, A Bhattacharjee, J. Nanosci. Nanotechnol 2 (4), 485-489, 2014

Synthesis, structural and optical properties of Al doped SnO2 nanoparticles, N Kumari, A Ghosh, S Tewari, A Bhattacharjee
Indian Journal of Physics 88, 65-70, 2014

Structural and optical properties of pure and Al doped ZnO nanocrystals, A Ghosh, N Kumari, S Tewari, A Bhattacharjee
Indian Journal of Physics 87, 1099-1104, 2013

Optical studies of a liquid crystalline compound 6O. 6, KD Thingujam, PR Alapati, B Choudhury, A Bhattacharjee
Liquid Crystals 40 (6), 810-816, 2013

Structural, electrical and optical properties of sintered SnO2 pellets, N Kumari, A Ghosh, S Tewari, A Bhattacharjee
Materials science in semiconductor processing 16 (3), 905-914, 2013

Effect of temperature on the refractive indices of liquid crystals and validation of a modified four-parameter model
K Thingujam, S Sarkar, B Choudhury, A Bhattacharjee, Acta Physica Polonica A 122 (4), 754-757, 2012

Studies on structural, electrical and dielectric properties of thermally evaporated cadmium sulphide (CdS) thin films
S Tewari, A Bhattacharjee, Institute of Fundamental Studies: Kandy, 2011

Structural, electrical and optical studies on spray-deposited aluminium-doped ZnO thin films, S Tewari, A Bhattacharjee
Pramana 76, 153-163, 2011

A review of liquid crystal dimers TK Devi, A Bhattacharjee, Assam University Journal of Science and Technology 5 (2), 225-228, 2010

Studies on AC conductivity of spray deposited ZnO thin films, S Tewari, A Bhattacharjee, PP Sahay, Assam University Journal of Science and Technology 5 (2), 216-219, 2010

A comparative study of the properties of the liquid crystalline compounds 50.5 and 50.6 in solid, solution and thin film forms by laser Raman spectroscopy, PR Alapati, A Bhattacharjee, AL Verma, 2010

Synthesis and characterization of Cadmium Chalcogenide CdX (X= S, Te) thin films, S Tewari, A Bhattacharjee
Int. J. Chem. Sci. 7 (1), 105-115, 2009

Structural, dielectric, and electrical studies on thermally evaporated CdTe thin films, S Tewari, A Bhattacharjee, PP Sahay
Journal of Materials Science 44, 534-540, 2009

Degree of charge transfer in the mixed stack donor-acceptor charge transfer complex of C~ 1~ 8TCNQ and TMB probed by laser Raman spectroscopy, A Bhattacharjee, AL Verma, INDIAN JOURNAL OF PHYSICS AND PROCEEDINGS OF THE INDIAN ASSOCIATION FOR THE CULTIVATION OF PHYSICS, 2005

Laser Raman studies on compounds 7. O4O. 7 and 7. O5O. 7, B Gogoi, A Bhattacharjee, PR Alapati, AL Verma
Liquid crystals 30 (8), 931-938, 2003

A comparative study of the properties of the liquid crystalline compounds 5O. 5 and 5O. 6 in solid, solution and thin film forms by laser Raman spectroscopy, A Bhattacharjee, PR Alapati, AL Verma, Liquid crystals 29 (5), 725-731, 2002

Dynamics of phase transitions in some ferroelectric and other liquid crystals, A Bhattacharjee
2002

Dynamics of phase transitions in a liquid crystal probed by Raman spectroscopy, A Bhattacharjee, PR Alapati, AL Verma, Liquid Crystals 28 (9), 1315-1320, 2001

Dynamics of electric-field-induced molecular reorientation of a surface-stabilized antiferroelectric liquid crystal in the smectic-C* phase probed by time-resolved infrared, AL Verma, B Zhao, A Bhattacharjee, Y Ozaki, Physical Review E 63 (5), 051704, 2001

Courses Taught

2023 - PH 401: Mathematical Physics-I (3-1-0:4)

2023 - PH 542: Science and Technology of Thin Films (3-0-0: 3)

2023 - PH 701: CHARACTERIZATION TECHNIQUES AND NON-EQUILIBRIUM THERMODYNAMICS (3-0-0: 3)


Administrative Responsibility

Dean (Faculty Welfare), from 1/07/2021 till date

1.    Dean (Research and Consultancy), from 11/07/2018 to 30/06/2021

2.    TEQIP Coordinator, from 01/01/2017 til the end of project (31/3/2022)

3.    Chairman, Exam Cell, from Aug 2013 to July 2014

4.    Associate Dean (Research & Consultancy), from July 2014 -June 2017

5.    Chairman, Placement Committee, from Sept 2014 - May 2017


Students Supervised/Supervising

Ph.D


1.       Sujit Tewari, Ph.D, Studies on structural,electrical and optical properties of thin films of some II-VI semiconductors(CdTe, Cds, Zno), 2006-2009

2.       Thingujam Kiranmala Devi, Ph.D, Optical and dielectric studies on some liquid crystals and liquid crystalline binary mixtures, 2010-2013

3.       Navnita Kumari, Ph.D, Study of structural,electrical and optical properties of pure and doped SnO-2 nanoparticales, 2010-2013

4.       Arindam Ghose, Ph.D, Structural,electrical and optical studies of pure and doped ZnO pellets, 2011-2016


Work Experience


1.       Lecturer, Department of Physics, St. Anthony's College, Shillong (May 2003 - Sept 2005)

2.       Assistant Professor, Department of Physics, National Institute of Technology Silchar, Assam (Oct 2005 - July 2013)


Additional Responsibility

Registrar (i/c), from 22/05/2017-08/01/2018