Research

Projects

Smart breath

Traditional blood test-based metabolite analysis is invasive, cumbersome, expensive, and painful. The overarching goal of SMART-BREATH is to develop face mask as a platform to integrate fiber optic sensors for non-invasive and real-time monitoring of biomarkers in exhaled breath, with specific emphasis on carbon dioxide, ammonia, and acetone. The real-time analysis of breath metabolite concentration indicates individual's physiological status and offers routes for early diagnosis and personalized treatment.

Video description of the project can be found here.

Publications:

Breath humidity sensing

Dust free glass

Aim of the project is develop dust repellant glass, as Fouling on glass surfaces reduces the solar panel efficiency and increases water consumption for cleaning. Super-

hydrophobic coatings on glass enable self-cleaning by allowing water droplets to carry away dirt particles. Funded by Saint-Gobain India.

Publication resulted in this project

Smart masks

Electrospun nanofibers sever dual purpose, one to offer protection against the harmful particulate matter PM2.5, PM10 and capture VOCs. For substrates for the fabrication of sensors that can target specific metabolites in breath capable of non-invasive health monitoring.

Related publications:

Protection against particulate matter.
Breath humidity sensor
Place holder for fabric based sensor

Publications

1. Srikrishnarka, P.; Patrakka, J.; Sun, Z.; Nonappa. Optical Fiber Sensor with Dynamically Responsive Cladding for Real-Time Breath Pattern Monitoring. ACS Omega 2025.

2. Bose, P.; Srikrishnarka, P.; Paatelainen, M.; Kini, A. R.; Som, A.; Pradeep, T. Nanocluster Reaction-Driven in Situ Transformation of Colloidal Nanoparticles to Mesostructures. Nanoscale 2025, 17 (2), 803–812.

3. Srikrishnarka, P.; Haapasalo, J.; Hinestroza, J. P.; Sun, Z.; Nonappa. Wearable Sensors for Physiological Condition and Activity Monitoring. Small Sci. 2024, 4 (7), 2300358.

4. Kumar, V.; Srikrishnarka, P.; Nagarajan, R.; Pradeep, T. Enhanced Electrical Output in an Electrostatic Generator Using Charged Water. ACS Sustain. Chem. Eng. 2024, 12 (35), 13106–13115

5. Sugi, K. S.; Sandra, A. P.; Ghosh, D.; Mohanty, J. S.; Kannan, M. P.; Sooraj, B.; Srikrishnarka, P.; Roy, J.; Dar, W. A.; Pradeep, T. Secondary Ligand-Induced Orthogonal Self-Assembly of Silver Nanoclusters into Superstructures with Enhanced NIR Emission. Nanoscale 2023, 15 (28), 11927–11934.

6. Srikrishnarka, P.; Kumaran, D.; Kini, A. R.; Kumar, V.; Nagar, A.; Islam, M. R.; Nagarajan, R.; Pradeep, T. Observing Real-Time Adhesion of Microparticles on Glass Surfaces. Langmuir 2023, 39 (48), 17071–17079.

7. Srikrishnarka, P.; Dasi, R. M.; Jana, S. K.; Ahuja, T.; Kumar, J. S.; Nagar, A.; Kini, A. R.; George, B.; Pradeep, T. Toward Continuous Breath Monitoring on a Mobile Phone Using a Frugal Conducting Cloth-Based Smart Mask. ACS Omega 2022, 7 (47), 42926–42938.

8. Paulthangam, K. M.; Som, A.; Ahuja, T.; Srikrishnarka, P.; Nair, A. S.; Pradeep, T. Role of Zinc Oxide in the Compounding Formulation on the Growth of Nonstoichiometric Copper Sulfide Nanostructures at the Brass–Rubber Interface. ACS Omega 2022, 7 (11), 9573–9581.

9. Gupte, T.; Pandurangan, S.; Islam, M. R.; Srikrishnarka, P.; Nagar, A.; Ayyadurai, N.; Thomas, T.; Pradeep, T. Human Skin-Cell-Based Sensor for Environmental Arsenic Detection and for Creating Social Awareness. ACS Sustain. Chem. Eng. 2022, 10 (51), 17124–17133.

10. Shome, A.; Rather, A. M.; Borbora, A.; Srikrishnarka, P.; Baidya, A.; Pradeep, T.; Manna, U. Design of a Waste Paper‐derived Chemically ‘Reactive’and Durable Functional Material with Tailorable Mechanical Property Following an Ambient and Sustainable Chemical Approach. Chem. Asian J. 2021, 16 (14), 1988–2001.

11. Satyabola, D.; Ahuja, T.; Bose, S.; Mondal, B.; Srikrishnarka, P.; Kannan, M.; Spoorthi, B.; Pradeep, T. Transformation of Nanodiamonds to Onion-like Carbons by Ambient Electrospray Deposition. J. Phys. Chem. C2021, 125 (20), 10998–11006.

12. Nagar, A.; Kumar, R.; Srikrishnarka, P.; Thomas, T.; Pradeep, T. Scalable Drop-to-Film Condensation on a Nanostructured Hierarchical Surface for Enhanced Humidity Harvesting. ACS Appl. Nano Mater. 2021, 4 (2), 1540–1550.

13. Mohanty, J. S.; Maity, A.; Ahuja, T.; Chaudhari, K.; Srikrishnarka, P.; Polshettiwar, V.; Pradeep, T. Gold Cluster-Loaded Dendritic Nanosilica: Single Particle Luminescence and Catalytic Properties in the Bulk. Nanoscale 2021, 13 (21), 9788–9797.

14. Kumar, V.; Srikrishnarka, P.; Mohanty, J. S.; Kannan, M. P.; Nagarajan, R.; Pradeep, T. Triboelectric Generators for Sustainable Reduction Leading to Nanoparticles and Nanoclusters. ACS Sustain. Chem. Eng. 2021, 9 (22), 7431–7436.

15. Islam, M. R.; Khurana, P.; Srikrishnarka, P.; Nagar, A.; Jash, M.; Jenifer, S. K.; Ganayee, M. A.; Kumar, M.; Pradeep, T. Aminoclay‐Graphene Oxide Composite for Thin‐Film Composite Reverse Osmosis Membranes with Unprecedented Water Flux and Fouling Resistance. Adv. Mater. Interfaces 2021, 8 (20), 2100533.

16. Islam, M. R.; Gupta, S. S.; Jana, S. K.; Srikrishnarka, P.; Mondal, B.; Chennu, S.; Ahuja, T.; Chakraborty, A.; Pradeep, T. A Covalently Integrated Reduced Graphene Oxide–Ion‐Exchange Resin Electrode for Efficient Capacitive Deionization. Adv. Mater. Interfaces 2021, 8 (5), 2001998.

17. Ghosh, D.; Ganayee, M. A.; Som, A.; Srikrishnarka, P.; Murali, N.; Bose, S.; Chakraborty, A.; Mondal, B.; Ghosh, P.; Pradeep, T. Hierarchical Assembly of Atomically Precise Metal Clusters as a Luminescent Strain Sensor. ACS Appl. Mater. Interfaces 2021, 13 (5), 6496–6504.

18. Egor, M.; Kumar, A. A.; Ahuja, T.; Mukherjee, S.; Chakraborty, A.; Sudhakar, C.; Srikrishnarka, P.; Bose, S.; Ravindran, S. J.; Pradeep, T. Cellulosic Ternary Nanocomposite for Affordable and Sustainable Fluoride Removal. ACS Sustain. Chem. Eng. 2021, 9 (38), 12788–12799.

19. Bose, S.; Chatterjee, A.; Jenifer, S. K.; Mondal, B.; Srikrishnarka, P.; Ghosh, D.; Chowdhuri, A. R.; Kannan, M.; Elchuri, S. V.; Pradeep, T. Molecular Materials through Microdroplets: Synthesis of Protein-Protected Luminescent Clusters of Noble Metals. ACS Sustain. Chem. Eng. 2021, 9 (12), 4554–4563.

20. Srikrishnarka, P.; Kumar, V.; Ahuja, T.; Subramanian, V.; Selvam, A. K.; Bose, P.; Jenifer, S. K.; Mahendranath, A.; Ganayee, M. A.; Nagarajan, R. Enhanced Capture of Particulate Matter by Molecularly Charged Electrospun Nanofibers. ACS Sustain. Chem. Eng. 2020, 8 (21), 7762–7773.

21. Rather, A. M.; Srikrishnarka, P.; Baidya, A.; Shome, A.; Pradeep, T.; Manna, U. Evaluating the Impact of Tailored Water Wettability on Performance of CO2 Capture. ACS Appl. Energy Mater. 2020, 3 (11), 10541–10549.

22. Mukherjee, S.; Shah, M.; Chaudhari, K.; Jana, A.; Sudhakar, C.; Srikrishnarka, P.; Islam, M. R.; Philip, L.; Pradeep, T. Smartphone-Based Fluoride-Specific Sensor for Rapid and Affordable Colorimetric Detection and Precise Quantification at Sub-Ppm Levels for Field Applications. ACS Omega 2020, 5 (39), 25253–25263.

23. Jakka Ravindran, S.; Mahendranath, A.; Srikrishnarka, P.; Anil Kumar, A.; Islam, M. R.; Mukherjee, S.; Philip, L.; Pradeep, T. Geologically Inspired Monoliths for Sustainable Release of Essential Minerals into Drinking Water. ACS Sustain. Chem. Eng. 2019, 7 (13), 11735–11744.

24. Iyengar, S. A.; Srikrishnarka, P.; Jana, S. K.; Islam, M. R.; Ahuja, T.; Mohanty, J. S.; Pradeep, T. Surface-Treated Nanofibers as High Current Yielding Breath Humidity Sensors for Wearable Electronics. ACS Appl. Electron. Mater. 2019, 1 (6), 951–960.

25. Gupte, T.; Jana, S. K.; Mohanty, J. S.; Srikrishnarka, P.; Mukherjee, S.; Ahuja, T.; Sudhakar, C.; Thomas, T.; Pradeep, T. Highly Sensitive As3+ Detection Using Electrodeposited Nanostructured MnOₓ and Phase Evolution of the Active Material during Sensing. 2019.

26. Gupte, T.; Jana, S. K.; Mohanty, J. S.; Srikrishnarka, P.; Mukherjee, S.; Ahuja, T.; Sudhakar, C.; Thomas, T.; Pradeep, T. Highly Sensitive As3+ Detection Using Electrodeposited Nanostructured MnO x and Phase Evolution of the Active Material during Sensing. ACS Appl. Mater. Interfaces 2019, 11 (31), 28154–28163.

27. Ahuja, T.; Ghosh, A.; Mondal, S.; Basuri, P.; Jenifer, S. K.; Srikrishnarka, P.; Mohanty, J. S.; Bose, S.; Pradeep, T. Ambient Electrospray Deposition Raman Spectroscopy (AESD RS) Using Soft Landed Preformed Silver Nanoparticles for Rapid and Sensitive Analysis. Analyst 2019, 144 (24), 7412–7420.

28. Mukherjee, S.; Kumar, A. A.; Sudhakar, C.; Kumar, R.; Ahuja, T.; Mondal, B.; Srikrishnarka, P.; Philip, L.; Pradeep, T. Sustainable and Affordable Composites Built Using Microstructures Performing Better than Nanostructures for Arsenic Removal. ACS Sustain. Chem. Eng. 2018, 7 (3), 3222–3233.

29. Haridas, A. K.; Gangaja, B.; Srikrishnarka, P.; Unni, G. E.; Nair, A. S.; Nair, S. V.; Santhanagopalan, D. Spray Pyrolysis-Deposited Nanoengineered TiO2 Thick Films for Ultra-High Areal and Volumetric Capacity Lithium Ion Battery Applications. J. Power Sources 2017, 345, 50–58.

30. Janani, M.; Srikrishnarka, P.; Nair, S. V.; Nair, A. S. An In-Depth Review on the Role of Carbon Nanostructures in Dye-Sensitized Solar Cells. J. Mater. Chem. A 2015, 3 (35), 17914–17938.

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