Unlocking treasure from fish bones: Bioinspired hydroxyapatite synthesis from Catla catla fish for sustainable waste-to-wealth Payel Deb, Sumit Das Lala, Paramita Sarkar, Amitabha Nath, Emon Barua International Journal of Materials Research, 2025 This study presents an innovative and sustainable method for synthesizing hydroxyapatite (HA) from Catla catla fish bones, addressing the need for environmentally friendly materials in biomedical applications. Fish bone waste is transformed into high-performance HA through acid pre-treatment, oven drying, and calcination at 900 °C. Characterization via Fourier-transform infrared spectroscopy and X-ray diffraction confirms the formation of HA with particle sizes ranging from 0.3–0.8 µm, which is ideal for enhancing surface area in biomedical contexts. Scanning electron microscopy and energy-dispersive X-ray spectroscopy reveal a highly porous structure and a Ca/P ratio of 1.68, closely resembling natural bone composition. The bioactivity of HA was evaluated using simulated body fluid over 7 and 28 days, with scanning electron microscopy and energy-dispersive X-ray analyses confirming hydroxycarbonate apatite layer formation, indicated by increased Ca and P content. X-ray diffraction further validates the bioactive nature of HA. In-vitro degradability testing demonstrated controlled degradation over 28 days, alongside pH changes in the SBF solution. Cytotoxicity analysis using human Wharton’s jelly mesenchymal stem cells confirmed the non-toxic nature of HA, showing a cell viability rate of 89.7 ± 3.1 % after 48 h. These findings emphasize the potential of fish bone-derived HA to be used in coating orthopedic and dental implants, creating porous bone scaffolds, and formulating bone cement, establishing it as a highly promising material for diverse biomedical applications.
Ti-Doped ZnO Nanowires: A Breakthrough in Non-Volatile Resistive Memory Application Amitabha Nath, Madhuri Mishra, Subhananda Chakrabarti IEEE Transactions on Nanotechnology, 2025 This paper explores the enhanced resistive memory capabilities of titanium (Ti)-doped zinc oxide (ZnO) nanowires (NWs) based devices. Utilizing pulsed laser deposition (PLD), ZnO NWs were fabricated on a ZnO seed film (SF), while Ti films were deposited using an electron beam evaporation technique. Two distinct devices, TZO NWs and ZnO NWs, were created with gold (Au) interdigitated electrodes (IDE). The TZO NWs based device exhibited superior resistive memory performances, showcasing a maximum window of 2.6 V at +10 V and 1.2 V at –10 V, surpassing the ZnO NWs based device. The introduction of Ti doping in ZnO NWs provided additional active sites for charge collection, introducing localized energy levels and enhancing overall device performance. These findings collectively highlight the scalability of the TZO NWs based device for next-generation non-volatile resistive memory (NVRM) applications.
Pulsed laser deposited Ti-doped ZnO nanowires for photodetector application Amitabha Nath, Madhuri Mishra, Avijit Dalal, Anirudhha Mondal, Payel Deb, Subhananda Chakrabarti Proceedings of SPIE the International Society for Optical Engineering, 2025 This work investigates the Photodetector performance of titanium (Ti)-doped zinc oxide (ZnO) nanowires (NWs) fabricated on silicon (Si) substrates using the pulsed laser deposition (PLD) technique. Detailed morphological characterization via field emission gun scanning electron microscopy (FEG-SEM) confirmed the growth and high aspect ratio of the Ti-doped ZnO NWs. Absorption spectroscopy revealed significant ultraviolet (UV) light absorption, with a bandgap energy of 3.21 eV, indicating efficient electronic transitions and potential photocatalytic enhancement. Finally, the current-voltage (I-V) measurements, conducted under dark conditions and illumination with various wavelengths (370 nm, 380 nm, and 390 nm), demonstrated a pronounced photocurrent enhancement upon UV exposure. The Ti-doped ZnO NWs exhibited strong wavelength-dependent photoconductive behavior at ‒1 V, emphasizing their high sensitivity and versatility for UV photodetection. The photocurrent measurements under 380 nm illumination and at ‒1 V showed a rapid rise time of 0.43 s and a fall time of 0.42 s, highlighting the material’s exceptional response and recovery dynamics. Furthermore, the stability and sensitivity of the Ti-doped ZnO NWs under varying light intensities were validated through time-dependent current analysis, with distinct transitions marking their robust light-sensing capabilities. These findings underscore the potential of Ti-doped ZnO NWs for high-performance Photodetector, combining fast response times, reliable sensitivity, and adaptability for advanced optoelectronic applications. This work demonstrates the promise of Ti-doped ZnO NWs as efficient candidates for next-generation light-sensing technologies.
Comparative Study of ZnO and WO3 Thin Films Grown by Pulsed Laser Deposition at Similar Substrate Temperature Amitabha Nath, Madhuri Mishra, Subhananda Chakrabarti Proceedings of SPIE the International Society for Optical Engineering, 2024 In this work, zinc oxide (ZnO) and tungsten trioxide (WO3) thin films were grown by a pulsed laser deposition (PLD) technique at an elevated substrate temperature of 400ºC. The PLD technique involves using a high-intensity laser to vaporize and deposit material onto an n-type silicon (Si) substrate. The field emission gun scanning electron microscopy (FEG-SEM) was employed to visualize and characterize the morphology of the two samples viz., ADW4 and ADZn4. The grazing incidence x-ray diffraction (GIXRD) was used to assess the crystallite structure of the two thin films based samples. The study found that ADW4 exhibited a significantly smaller average crystallite size (6.48 nm) compared to ADZn4 (16.22 nm). The smaller crystallite size of ADW4 is noteworthy and indicates the potential presence of quantum confinement effects, which are crucial in the development of optoelectronic devices such as light-emitting diodes (LEDs), and photodetectors. The room-temperature photoluminescence (RTPL) emission peak for ADW4 and ADZn4 was found to be at 323 nm (3.84 eV) and 379 nm (3.27 eV), respectively, under an excitation wavelength of 300 nm. The RTPL spectra revealed that the peak at around 323 nm for ADW4 gradually shifted towards the ultra-violet (UV) region compared to ADZn4 (379 nm). Significantly, such blue emission is shifted towards the UV-A region in ADW4 suggesting that it could be used to produce UV-A LEDs, which have applications in disinfection, water purification, and UV curing processes.
Unraveling the role of varying composition on electronic and optical properties of bilayer MoxW(1−x)S2 for photovoltaic applications Archishman Saha, Nivedita Pandey, Amitabha Nath, Subhananda Chakrabarti Proceedings of SPIE the International Society for Optical Engineering, 2024 Transition metal dichalcogenides are being used extensively due to their 2-D nature, in spintronic and optoelectronic technologies. TMDs, specifically molybdenum disulfide (MoS<sub>2</sub>) and tungsten disulfide (WS<sub>2</sub>), have recently attracted considerable interest and extensive research has been dedicated to these materials, unveiling their immense potential for various applications such as catalysts, lubricants, lithium batteries, phototransistors, and nanoelectronics. Mo<sub><i>x</i></sub>W<sub>1−<i>x</i></sub>S<sub>2</sub> alloys have been synthesized via experimental techniques to harness the properties of both materials. Bilayer TMDs exhibit properties such as tunable bandgap, higher exciton binding energy and interlayer interaction giving rise to new optical modes and excitonic resonances. In this work we study the utility of bilayer Mo<sub><i>x</i></sub>W<sub>1−<i>x</i></sub>S<sub>2</sub> alloys through first principle computational techniques. We observe an indirect bandgap of around 1.49-1.55eV as we vary the composition of the alloy from 72% Mo to 22% Mo. This capability is significant as it allows researchers to precisely engineer the electronic and optical properties of the material to suit various device requirements. The out-of-plane absorption coefficient of the alloys shows a peak shift from 1.95eV to 2.55eV on increasing percentage of W in the alloy. This shift in the absorption spectrum indicates that the material can effectively absorb light of different wavelengths, thus enabling the design of TMD-based photodetectors with the capability to detect a broad range of wavelengths. This versatility in light absorption is of great importance for applications such as sensors, photovoltaics, optoelectronic devices, where the detection of specific wavelengths is crucial.
Design and development of arduino based portable air quality monitoring systems Shubhajit Vishwas, Sayantan Saha, Monali Nath Bhowmik, Amitabha Nath, Shyam S Kundu, Sambhu Nath Pradhan, Mitra Barun Sarkar 1st Odisha International Conference on Electrical Power Engineering Communication and Computing Technology Odicon 2021, 2021
Methods for Pulsed Laser-Deposited Zinc Oxide Nanowires A Nath, M Mishra, S Chakrabarti IN Patent 587,883 , 2025 2025
Pulsed laser deposited Ti-doped ZnO nanowires for photodetector application A Nath, M Mishra, A Dalal, A Mondal, P Deb, S Chakrabarti Smart Materials for Opto-Electronic Applications 2025 13528, 221-230 , 2025 2025
Sputter-coated In2O3: TiO2 hybrid films for next-generation solar cell application P Deb, A Nath Smart Materials for Opto-Electronic Applications 2025 13528, 231-239 , 2025 2025 Citations: 1
Unlocking treasure from fish bones: bioinspired hydroxyapatite synthesis from Catla catla fish for sustainable waste-to-wealth P Deb, S Das Lala, P Sarkar, A Nath, E Barua International Journal of Materials Research 116 (3), 173-182 , 2025 2025 Citations: 1
Ti-doped ZnO Nanowires: A Breakthrough in Non-volatile Resistive Memory Application A Nath, M Mishra, S Chakrabarti IEEE Transactions on Nanotechnology 24, 115-120 , 2025 2025 Citations: 1
Advancing superhydrophilic surfaces: The impact of Ti@ ZnO nanowires fabricated by pulsed laser deposition A Nath, M Mishra, S Chakrabarti Ceramics International 51 (13), 17200-17214 , 2025 2025 Citations: 3
Unlocking the Performance of Next-generation Non-volatile Capacitive Memory Devices with Ti-doped ZnO Nano Wires via Pulsed Laser Deposition A Nath, M Mishra, BK Mahajan, S Chakrabarti Journal of Alloys and Compounds 1010, 177133 , 2024 2024 Citations: 4
Glancing angle fabricated Au/ZrO 2 nanoparticles based device for non‑volatile capacitive memory application R Raman, A Nath, MB Sarkar Journal of Materials Science: Materials in Electronics 35 (15), 1009 , 2024 2024 Citations: 2
Comparative study of ZnO and WO3 thin films grown by pulsed laser deposition at similar substrate temperatures A Nath, M Mishra, S Chakrabarti Oxide-based Materials and Devices XV 12887, 141-151 , 2024 2024 Citations: 1
Investigation of electronic and optical properties of trilayer MoxW (S2 alloys with varying composition A Saha, N Pandey, A Nath, S Chakrabarti 2D Photonic Materials and Devices VII 12888, 128880C , 2024 2024 Citations: 2
Investigation of strain propagation, optical, and structural properties of a novel heterostructure with multilayer Stranski-Krastanov (SK) strain-coupled quantum dots (QDs) R Saha, FSA Sabiha, R Gourishetty, R Kumar, A Nath, S Chakrabarti Physics and Simulation of Optoelectronic Devices XXXII 12880, 243-249 , 2024 2024
Performance analysis of lead free organic-inorganic hybrid double perovskites MA2NaBiCl6 based fabricated solar cell device N Neelu, N Pandey, A Nath, S Chakrabarti Organic Photonic Materials and Devices XXVI 12883, 59-65 , 2024 2024 Citations: 1
Unraveling the role of varying composition on electronic and optical properties of bilayer MoxW (1− x) S2 for photovoltaic applications A Saha, N Pandey, A Nath, S Chakrabarti Physics and Simulation of Optoelectronic Devices XXXII 12880, 226-232 , 2024 2024 Citations: 2
Impact of high substrate temperature on pulsed laser deposited ZnO pillars: A technological route to investigate the structural, optical and superhydrophilic properties A Nath, M Mishra, S Chakrabarti Applied Surface Science 646, 158907 , 2023 2023 Citations: 18
Effect of High–Temperature Annealing on Au Thin Film/TiO2 Nanowires for Enhanced Photodetection RK Nanda, A Nath, LR Singh, MB Sarkar IEEE Transactions on Nanotechnology 22, 769-776 , 2023 2023 Citations: 6
Morphological, Optical, and Surface Wettability Analysis of Electron-Beam Synthesized Annealed TiO 2 NW/Au TF RK Nanda, A Nath, LR Singh, MB Sarkar Brazilian Journal of Physics 53 (4), 85 , 2023 2023 Citations: 1
Superior photosensing performance by Ag nanoparticles textured Al 2 O 3 thin film based device A Das, A Nath, S Pawar, NK Singh, MB Sarkar Journal of Nanoparticle Research 25 (5), 88 , 2023 2023 Citations: 5
An in-depth analysis on the switching response and impedance curves of n-si/In2O3 NW/Ag NPs/In based devices by a double-step glancing angle deposition technique A Nath, MB Sarkar Physica B: Condensed Matter 660 (17), 414886 , 2023 2023 Citations: 4
Post-annealing Effect on Surface Wettability by Electron Beam Evaporated Ag/In 2 O 3 Thin Films A Nath, A Chakraborty, A Das, LR Singh, MB Sarkar Brazilian Journal of Physics 52 (6), 204 , 2022 2022 Citations: 4
Investigation of structural, optical and electrical properties of TiO2 thin film-nanowire-based device for photodetector application JT Mazumder, R Mayengbam, A Nath, MB Sarkar Optical materials 133, 112936 , 2022 2022 Citations: 10
MOST CITED SCHOLAR PUBLICATIONS
Surface-Plasmon-Induced Ag Nanoparticles Decorated In2O3 Nanowires for Low Noise Photodetectors A Nath, MB Sarkar Plasmonics 16 (1), 37-48 , 2020 2020 Citations: 29
Enhancing Detectivity of Indium-Oxide-Based Photodetectors via Vertical Nanostructuring Through Glancing Angle Deposition A Nath, BK Mahajan, LR Singh, S Vishwas, RK Nanda, MB Sarkar Journal of Electronic Materials 50 (6), 3722-3730 , 2021 2021 Citations: 21
Indium Nanoparticles Capped TiO2 Nanowire Array for Boosted Photosensing Adoption VK Yadav, A Nath, A Das, JT Mazumder, MB Sarkar IEEE Electron Device Letters 42 (2), 192 - 195 , 2020 2020 Citations: 19
Impact of high substrate temperature on pulsed laser deposited ZnO pillars: A technological route to investigate the structural, optical and superhydrophilic properties A Nath, M Mishra, S Chakrabarti Applied Surface Science 646, 158907 , 2023 2023 Citations: 18
Ag Nanoparticles Sheltered In2O3 Nanowire as a Capacitive MOS Memory Device A Nath, BK Mahajan, MB Sarkar IEEE Transactions on Nanotechnology 19, 856 - 863 , 2020 2020 Citations: 18
Bandgap modulation of glancing angle deposition aided Ag nanoparticles covered TiO2 thin film by high temperature annealing A Nath, R Raman, VK Yadav, P Sannibabu, MB Sarkar Journal of Nanoscience and Nanotechnology 20 (12), 7636-7643 , 2020 2020 Citations: 16
Silver Nanoparticles Textured Oxide Thin Films for Surface Plasmon Enhanced Photovoltaic Properties A Nath, N Bhati, BK Mahajan, JK Rakshit, MB Sarkar Plasmonics 17 (1), 193-201 , 2021 2021 Citations: 14
Synthesis and detailed characterizations of Ag nanoparticles coated In2O3 nanostructured devices: An analytical and experimental approach A Nath, BK Mahajan, A Mondal, LR Singh, MB Sarkar Journal of Vacuum Science & Technology B 39 (5) , 2021 2021 Citations: 12
Design and Development of Arduino Based Portable Air Quality Monitoring System S Vishwas, S Saha, MN Bhowmik, A Nath, SS Kundu, SN Pradhan, ... 2021 1st Odisha International Conference on Electrical Power Engineering … , 2021 2021 Citations: 12
Enhanced surface wettability of Ag: TiO2 heterostructured assembly using double step glancing angle deposition technique A Nath, LR Singh, MB Sarkar Ceramics International 48 (8), 11392-11400 , 2022 2022 Citations: 11
Investigation of structural, optical and electrical properties of TiO2 thin film-nanowire-based device for photodetector application JT Mazumder, R Mayengbam, A Nath, MB Sarkar Optical materials 133, 112936 , 2022 2022 Citations: 10
Indium Nanoparticles Coated high dielectric TiO2 Nanowire for Capacitive Memory Application VK Yadav, A Nath, MB Sarkar IEEE Transactions on Nanotechnology 20, 860-865 , 2021 2021 Citations: 7
Fast Response UV Detector by Vertically Allied ZrO2 Nanowire Array through Glancing Angle Deposition R Raman, A Nath, RK Nanda, A Das, S Vishwas, MB Sarkar IEEE Photonics Technology Letters 33 (12), 631-634 , 2021 2021 Citations: 7
Effect of High–Temperature Annealing on Au Thin Film/TiO2 Nanowires for Enhanced Photodetection RK Nanda, A Nath, LR Singh, MB Sarkar IEEE Transactions on Nanotechnology 22, 769-776 , 2023 2023 Citations: 6
Superior photosensing performance by Ag nanoparticles textured Al 2 O 3 thin film based device A Das, A Nath, S Pawar, NK Singh, MB Sarkar Journal of Nanoparticle Research 25 (5), 88 , 2023 2023 Citations: 5
Influence of Annealing Temperature on ZrO2 Nanoparticles for Improved Photodetection R Raman, A Nath, MB Sarkar IEEE Electron Device Letters 46 (3), 918-921 , 2022 2022 Citations: 5
Unlocking the Performance of Next-generation Non-volatile Capacitive Memory Devices with Ti-doped ZnO Nano Wires via Pulsed Laser Deposition A Nath, M Mishra, BK Mahajan, S Chakrabarti Journal of Alloys and Compounds 1010, 177133 , 2024 2024 Citations: 4
An in-depth analysis on the switching response and impedance curves of n-si/In2O3 NW/Ag NPs/In based devices by a double-step glancing angle deposition technique A Nath, MB Sarkar Physica B: Condensed Matter 660 (17), 414886 , 2023 2023 Citations: 4
Post-annealing Effect on Surface Wettability by Electron Beam Evaporated Ag/In 2 O 3 Thin Films A Nath, A Chakraborty, A Das, LR Singh, MB Sarkar Brazilian Journal of Physics 52 (6), 204 , 2022 2022 Citations: 4
Enhanced Photodetection in Glancing Angle Deposited One-Dimensional In₂O₃ Nanorod Array. A Nath, R Raman, LR Singh, MB Sarkar Journal of Nanoscience and Nanotechnology 21 (5), 3115-3122 , 2021 2021 Citations: 4
