Dr. Mallar Ray

Assistant Professor (Endowment)

Dr. M. N. Dastur School of Materials Science and Engineering

 

Academic Qualifications

• Ph.D. (BESU, Shibpur, 2010)
• M.Sc. in Environmental Sciences (University of Nottingham, 2003)
• M.Sc. in Physics (University of Calcutta, 1996)
• B.Sc. (University of Calcutta, 1994).

Awards and Honours

• G. C. Jain Memorial Prize for best PhD thesis in Materials Science, by Materials Research Society of India in 2011
• Chevening/Commonwealth Scholarship, by Foreign and Commonwealth Office, 2002-2003.
• Developing Solutions Scholarship by University of Nottingham, 2002.

Contact

Phone

1. Office: +91 (0) 33 2668 4561/62/63 (ext-638)
2. Residence: +91 (0) 33 2343 1926

Address

1. Office: Room No. MST 203 B, Dr. M. N. Dastur School of Materials Science and Engineering, Indian Institute of Engineering Science and Technology, Shibpur, PO: Botanic Garden, Howrah: 711103, West Bengal, India
2. Residence: 42/28 New Ballygunje Road, Kolkata: 700039, West Bengal, India
3. E-Mail: mray@matsc.iiests.ac.in, mallar.r@gmail.com

Research Areas

• Nanomaterials
• Optical and transport properties

My primary research interest is focused on understanding size dependent properties of materials.

Over the last fifteen years we have developed some expertise on preparation a variety of nanostructures including carbon, silicon, noble metals (Au and Ag), compound semiconductors (CdS, CdSe, ZnO), conducting polymers (PANI), high performance polymers (PEI, PES) and their composites and hybrids. We can prepare 0D, 1D and 2D nanostructures using PECVD, wet-chemical methods, mechano-chemical, electro-chemical and photo-chemical strategies. We investigate the structural, optical and transport properties of different nanostructures and try to understand mechanisms with special focus on modification of electronic band-structure. We also look at potential applications of nanostructures for development of efficient thermoelectric materials, sensors and LEDs.

Completed Projects

• “Study of Luminescence and Structural Properties of Mechanically Milled Silicon Nanocrystals and Electro-chemically Prepared Nanostructured Porous Silicon” Sponsored by University Grants Commission, completed in 2010

Recent Publications (selected)

1. D. Karar, N. R. Bandyopadhyay, A. K. Pramanick, D. Acharyya, G. Conibeer, N. Banerjee, O. E. Kusmartseva and M. Ray* “Quasi-Two-Dimensional Luminescent Silicon Nanosheets” J Phys. Chem. C, 122 (33), 18912–18921, 2018
2. A. B. Siddique, A. K. Pramanik, S. Chatterjee, and M. Ray* “Amorphous Carbon Dots and their Remarkable Ability to Detect 2,4,6-Trinitrophenol” Sci. Rep. 8, Article number: 9770, 2018 
3. A. Hazra, S. M. Hossain and M. Ray*, “Gold-Silver nanostructure: plasmon-plasmon interaction” Vacuum, 146, 437-443, 2017
4. U. Ghanta, M. Ray*, N. R. Bandyopadhyay and S. M. Hossain, “Unipolar resistive switching and tunnelling oscillations in isolated Si-SiO_x core-shell nanostructure” Nanotechnology, 27, 455702, 2016
5. A. Jana, S. Ghosh, P. S. Devi, N. R. Bandyopadhyay, and M. Ray*, “Tunable Charge Transport through n-ZnO Nanorods on Au coated Macroporous p-Si” J. Mater. Chem. C, 2, 9613 - 9619, 2014
6. T. S. Basu and M. Ray* “Charge Transfer Induced Encapsulation of Si Quantum Dots by Atomically Larger and Highly Lattice-Mismatched Au Nanoparticles” J. Phys. Chem. C, 118, 5041–5050, 2014
7. M. Ray*, T. S. Basu, N. R. Bandyopadhyay, R. F. Klie, S. Ghosh, S. O. Raja and A. K. Dasgupta “Highly Lattice-mismatched Semiconductor-Metal Hybrid Nanostructures: Gold Nanoparticle Encapsulated Luminescent Silicon Quantum Dots” Nanoscale, 6, 2201-2210, 2014
8. T. S. Basu, R. Yang, S. J. Thiagarajan, S. Ghosh, S. Gierlotka, and M. Ray* “Remarkable thermal conductivity reduction in metal-semiconductor nanocomposites” Appl. Phys. Lett., 103, 083115, 2013
9. T. S. Basu, S. Ghosh, S. Gierlotka, and M. Ray* “Collective Charge Transport in Semiconductor-Metal Hybrid Nanocomposite” Appl. Phys. Lett., 102, 053107, 2013
10. M. Ray*, A. Jana, U. Ghanta, N. R. Bandyopadhyay and S. M. Hossain “Photoluminescence from Oxidized Macroporous Silicon: Nano-Ripples and Strained Silicon Nanostructures” IEEE Trans. Device Mater. Rel., 13, 87-92, 2013