Research Theme:

Semiconductor Nanostructures and 2D Materials for Advanced Energy, Environment & Biosensing Applications


bulet2 Current Research Areas:
  • Semiconductor Nanowires, Quantum dots, Photovoltaics, Biosensors
  • Graphene, MoS2 and Hybrid 2D nanostructures
  • Optoelectronic materials and devices
  • Hybrid Perovskite Semiconductors for Solar cells and LEDs
  • Thin Film and Plasma/ Ion beam processing
  • Organic Semiconductors Thin films and Devices
  • DFT, FEM Simulations

 

bullt3 Awards and Fellowships:

 

 

bullt4 Membership:

 

 

bullt4 Editorial Board Member:

 

 

bullt5 Major Conferences/Workshops Organized:

 

 

bullt6 Invited/ Plenary/Keynote Lectures in International/National Conferences/ Workshops:

 
  1. Rapid Thermal Annealing Induced Shape Evolution of Fluorine-Doped TiO2 Nanocrystals and Its High Photoluminescence Quantum Yield (Invited Talk), The International Conference on Electron Microscopy (EMSI-2018), Bhubaneswar, India, July 18-20, 2018.

  2. Mesoporous Si Nanowire Templated Growth of Organo-Metal Halide Perovskite Nanoparticles and Its Photoluminescence Enhancement (Invited Talk), The International Conference on Electron Microscopy and Allied Techniques (EMSI-2017), Mahabalipuram, India, July 17-19, 2017.

  3. Plasmonic Ag/Au/Pt Nanoparticle Decorated Mesoporous Si Nanowires and MoS2@TiO2(B) Nanobelts Heterostructures for Photovoltaic and Photocatalytic Applications (Invited Talk), 9th International Conference on Materials for Advanced Technologies (ICMAT 2017), Singapore, June 18-23, 2017.

  4. Mesoporous Si Nanowire Heterostrucures for Broad-band Light Emission, Visible Light Photocatalysis, SERS and Bio-sensing Applications (Invited Talk), Advances in Materials Science, Gauhati  University, Mar 24-25, 2017. 

  5. Graphene Quantum Dots: Formation Mechanism, Edge State Conversion, Bio-imaging and Photocatalytic Applications (Invited Talk), SPS March Meeting 2017, JNU, New Delhi, March 17-18, 2017

  6. Organic-Inorganic Hybrid Nanostructures for Solar Light Driven Photocatalysis (Invited Talk), 2nd International Conference on Emerging Materials: Characterization & Application (EMCA-2017), NIT Durgapur, March 15-17, 2017.

  7. Plasmonic Metal Nanoparticle Decorated Si Nanowires Array for Light Emission (Invited Talk), Visible Light Photocatalysis, SERS and Bio-sensing Applications, Current Trends in Condensed Matter Physics, IACS, Kolkata March 3-4, 2017.

  8. Understanding the Mechanism of Visible Photoluminescence from Chemically Derived Graphene and Graphene Quantum Dots and its Application in Bio-Imaging (invited Talk), National conference on HARD AND SOFT CONDENSED MATTER PHYSICS (NCHSCMP-2017), Tezpur University, March 2-4, 2017

  9. Multifunctional Si Nanowires Decorated with Metal Nanoparticles: White Light Emission, Photocatalysis, SERS and Bio-sensing Applications (Invited Talk), International Conference on Emerging Trends in Nanomaterials Science & Technology (ICETNMST 2017), NIT Nagaland, India. Jan 4 – 6, 2017.

  10. Functional Hybrid Nanostructures of Graphene, Graphitic Carbon Nitride, TiO2 and Plasmonic Metal Nanoparticles for Water Purification by Solar Light Driven Catalysis (Invited Talk), International Conference on Functional Materials (ICFM 2016), IIT Kraragpur, India, Dec 12-14, 2016. 

  11. Solar light Driven Photocatalysis by Functional Hybrid Nanostructures for Water Purification and Environmental Cleaning (Invited Talk), National Conference on Nanoscience and Nanotechnology-16 (NCRANNT-2016), Shillong, India, Sept 8-9, 2016.

  12. Application of Electron Microscopy in the Study of Hybrid Nanostructured Photocatalysts (Invited Talk), International Conference on Electron Microscopy (EMSI-2016), Varanasi, India, June 2-4, 2016.

  13. Efficient Physical Functionalization of Graphene and Graphene Oxide for Photocatalytic and Photoconductive Applications (Invited Talk), 6th International Conference on Advanced Nanomaterials (ANM-2015), Aveiro, Portugal, July 20-22, 2015.

  14. Site Selective Physical Functionalization of Graphene and Its Application in the Fabrication of Graphene-ZnO Nanowire Based Efficient Photodetectors (MRSI Invited Talk), Materials Research Society of India, Kalpakkam Chapter, IGCAR, Kalpakkam, Feb 5, 2015.

  15. Tunable Photoluminescence from Functionalized Graphene Quantum Dots and Graphene- ZnO Nanowires Hybrid (Invited Talk), 3rd International Conference on Nanoscience & Nanotechnology (ICONN2015), SRM University, Chennai, Feb 4-6, 2015.

  16. Site Selective Physical Functionalization of Graphene and Its Application for the Growth of Vertically Aligned ZnO Nanowires (Invited Talk), International Conference on Emerging Materials: Characterization &Application (EMCA-2014), CSIR-CGCRI, Kolkata, Dec 4-6, 2014.

  17. Nanotechnology and Its Applications in Renewable Energy (Inaugural Plenary Talk), UNISA's BRICS International symposium on Energy, Materials and Innovations, Johannesburg, South Africa, March 5-7, 2014. 

  18. Graphene based hybrid nanostructures for Optoelectronic Applications (Plenary Talk), UNISA's BRICS International symposium on Energy, Materials and Innovations, Johannesburg, South Africa, March 5-7, 2014. 

  19. Graphene as a 2-D Platform for the Fabrication of 0-D Metal and 1-D Semiconductor Nanostructures (Invited Talk), International Conference on Green Energy and Smart Materials through Science, Technology & Management, Guwahati University, Jan 21-23, 2014.

  20. Graphene- ZnO Nanowire Hybrid Nanostructures: Controlled Growth and Optoelectronic Applications (Plenary Talk), National Conference on Nanomaterials and Devices, NIT Srinagar, October 3-5, 2013.

  21. Ultrafast UV Photodetection and Efficient Second Harmonic Generation from Metal Nanoparticle Decorated ZnO Nanowires (Invited Talk), International Conference on Nanotechnology (ICNT-2013), Haldia Institute of Technology (HIT), India. October 24-25, 2013.  

  22. ZnO/Organic and ZnO/Metal Nanowire Heterostructures for Highly Efficient UV Photodetection (Invited Talk), 4th International Conference on Nanostructures Self- assembly (NANOSEA 2012), Sardinia, Italy, June 25-29, 2012.

  23. Doped ZnO Nanowire Heterostructures for Highly Sensitive & Fast Response UV Photodetectors (Keynote Lecture), Workshop on Applications Of Nanotechnology In Modern Energy Concepts, Dresden, Germany, June 4-9, 2012.

  24. Defect Engineering in Carbon Nanotubes and its Applications in Efficient Fluorescence Quenching of Different Fluorophores (Invited Talk), 1st International Conference on Functional Materials for Defence (ICFMD-2012), Pune, India, May 18-20, 2012.

bullt5 Recent Publications:

 
  1. Kamal Kumar Paul, N. Sreekanth, Ravi K. Biroju, A. J Pattison, A. Guha, T. N. Narayanan, D. E. López, N. V. Rees, W. Theis and P. K. Giri, Strongly Enhanced Visible Light photoelectrocatalytic Hydrogen Evolution Reaction in n-doped MoS2 /TiO2(B) Heterojunction by Selective Decoration of Platinum Nanoparticles at the MoS2 Edge Sites, J. Mater. Chem. A (ACCEPTED). DOI: 10.1039/C8TA06783J , I.F. 9.93  
  1. Ramesh Ghosh, Joydip Ghosh, Ruma Das, Larionette P. L. Mawlong, Kamal Kumar Paul and P. K. Giri, Multifunctional Ag Nanoparticle Decorated Si Nanowires for sensing, photocatalysis and light Emission Applications, J, Colloid. Interface 532, 464 (2018). I.F. 5.09
  2. Larionette P. L. Mawlong, Kamal K. Paul, P. K. Giri, Direct CVD Growth of Monolayer MoS2 on TiO2 Nanorods and Evidence for Doping Induced Strong Photoluminescence Enhancement, J. Phys. Chem. C 122, 15017-15025 (2018). I.F. 4.58
 
  1. Kamal Kumar Paul, N. Sreekanth, Ravi K. Biroju#, Tharangattu N. Narayanan, and P. K. Giri, Solar Light Driven Photoelectrocatalytic Hydrogen Evolution and Dye Degradation by Metal-free Few-layer MoS2 Nanoflower/TiO2(B) Nanobelts Heterostructure, Solar Energy Materials and Solar Cells 185, 364-374 (2018). I.F. 4.78

  2. Kamal K. Paul, Subhadip Jana, P. K. Giri,  Tunable and High Photoluminescence Quantum         Yield     from Self-Decorated TiO2 Quantum Dots on Fluorine doped Mesoporous TiO2 Flowers by Rapid Thermal Annealing, Part. Part. Syst. Charact. 1800198, 1-16 (2018).

  3. B. Choudhury, Kamal K. Paul, D. Sanyal, P. K. Giri, A. Hazarika, Evolution of Nitrogen-Related Defects in Graphitic Carbon Nitride Nanosheets Probed by Positron Annihilation and Photoluminescence Spectroscopy, J. Phys. Chem C 122, 9209-9219 (2018) I. F. 4.53,

  4. Joydip Ghosh, Ramesh Ghosh, and P. K. Giri, Mesoporous Si Nanowire Templated Controlled Fabrication of Organometal Halide Perovskite Nanoparticles with High Photoluminescence Quantum Yield for Light-Emitting Applications, ACS Applied Nano Materials 1, 1551-1562 (2018).  

  5. Ruma Das, Gone Rajender, P. K. Giri, Anomalous Fluorescence Enhancement and Fluorescence Quenching of Graphene Quantum Dots by Single Walled Carbon Nanotubes, Phys. Chem. Chem. Phys. 20, 4527 (2018),  I.F. 4.1

  6. Ramesh Ghosh, Ruma Das and P. K. Giri, Label-free Glucose Detection over a Wide Dynamic Range by Mesoporous Si Nanowires Based on Anomalous Photoluminescence Enhancement, Sensors & Actuators B 260, 683 (2018). I.F. 5.40  

  7. J. Kumar, H. B. Nemade, P. K. Giri, Adsorption of Small Molecules on Niobium Doped Graphene: A Study Based on Density Functional Theory, IEEE Electron Device Letters 99, 1 (2018). I.F. 3.048 

  8. G. Rajender, J. Kumar and P. K. Giri, Interfacial Charge Transfer in TiO2 Nanoparticle-Graphene Quantum Dot Hybrid and Its influence on the Enhanced Visible Light Photocatalysis, Appl. Catalysis B 224, 960-974 (2017). I.F. 9.44

  9. Sk Md Obaidulla, S. Singh, Y. N. Mohapatra, P. K. Giri, Ambient condition bias stress stability of vanadium (IV) oxide-phthalocyanine based p-channel organic field-effect transistors, J. Phys. D. Appl. Phys. 51, 015110 (2018)I. F. 2.588

  10. Jitendra Kumar, H. B. Nemade, P. K. Giri, Density Functional Theory Investigation of Negative Differential Resistance and Efficient Spin Filtering in Niobium Doped Armchair Graphene Nanoribbons, Phys. Chem. Chem. Phys. 19, 29685 - 29692 (2017), I.F. 4.123

  11. Kamal Kumar Paul and P. K. Giri, Role Of Surface Plasmons And Hot Electrons On The Strong Visible Light Photocatalysis By Defect Enriched Ag@Tio2 Nanorods, J. Phys. Chem. C. 121, 20016 (2017). I.F. 4.53 

  12. Joydip Ghosh, Ramesh Ghosh, and P. K. Giri, Tuning the Visible Photoluminescence in Al Doped ZnO Thin Film and its Application in Label-free Glucose Detection, Sensors & Actuators B 254, 681 (2018). I.F. 5.40  

  13. Biroju, Ravi; D. Das, R. Sharma, S. Pal, L. P. L. Mawlong, K. Bhorkar, P. K. Giri, A. Singh, T.N. Narayanan, "On the Hydrogen Evolution Reaction Activity of Graphene-MoS2 van der Waals Heterostructures", ACS Energy Letter. 2, 1351 (2017). " Among the most read articles for the past month....", I.F. 12.27  (HIGHEST EVER IMPACT FACTOR FROM OUR GROUP!)

   
   

 Recent Achievements/ NEWS:

1. Dr. Ravi K. Biroju, Ex-student of our group, received  "Top Cited Author Award (India) from IOP Publishing, UK". His article "Catalyst free growth of ZnO nanowires on graphene and graphene oxide and its enhanced photoluminescence and photoresponse" has been Top 1% of the most-cited papers from India in the field of Materials published across the whole IOP Publishing portfolio in the past three years (2015 to 2017), using citations recorded in Web of Science.

     "When stacking different 2D crystals together to form "van der Waals solids", synergetic and interface-induced effects become very important. In Nanotechnology we report the development of CVD grown atomic layers in a hydrogen evolution reaction (HER) photo-electrocatalytic cell based on single layer graphene and MoS2 layers. We use a novel layer-by-layer transfer technique and demonstrate the significance of the van der Waals stacking sequence."

   5. Our article entitled "On the Hydrogen Evolution Reaction Activity of Graphene-MoS2 van der Waals Heterostructures", ACS Energy Letter. 2, 1351 (2017) is " Among the most read articles for the past month...."

 

Students Achievements:

 
  • Ms. Larionett P. L. Mawlong, Research Scholar of our group (Centre for Nanotechnology) won the BEST POSTER AWARD for her paper entitled "Photoluminescence Study of CVD Grown Monolayer MoS2 Film on TiO2 Nanorods Array Template”  at the International conference on Advanced Nanomaterials and Nanotechnology (ICANN2017), Dec 2017, Dec 2017, IIT Guwahati, India. Congratulations!   

 
  • Ms. Larionett P. L. Mawlong, Research Scholar of our group (Centre for Nanotechnology) won the BEST POSTER AWARD (1st Prize) for her paper entitled "The Effect of Rapid Thermal Annealing on the Two Dimensional MoS2 Layers Grown by Chemical Vapor Deposition" at the National Conference on Nanoscience and Nanotechnology-16 (NCRANNT-2016), Sept 8-9, 2016, Shillong, India. Congratulations!   

 
  • Ms. Ruma Das, Research Scholar of our group (Physics) won the  BEST POSTER AWARD (3rd Prize) for her paper entitled "Effect of Ball Milling on the Photophysical Properties of Nanodiamond" at the National Conference on Nanoscience and Nanotechnology-16 (NCRANNT-2016), Sept 8-9, 2016, Shillong, India. Congratulations!   

 
 
  • Mr. Ramesh Ghosh, Research Scholar of our group (Physics) won the BEST POSTER AWARD at the 'APTTEM-2016' National workshop on Advanced Probing Techniques in TEM, for his poster entitled   "Electron Microscopy and Spectroscopic Studies of Arbitrary Shaped Si Nanocrystals Decorated on Vertical Si Nanowires Array". Congratulations!   

 
  • Mr. Kamal Paul, Research Scholar of our group (Physics) won the BEST POSTER AWARD at the International conference on  Nanoscience, nanotechnology and Advaced materials for his poster entitled "Enhanced Visible Light Photocatalytic Activity of Ag2O Decorated TiO2 Nanaorods Heterostructure" (2015). Congratulations! 

 
  • Mr. Ravi K Biroju, Research Scholar of our group (Centre for Nanotechnology) won the BEST POSTER AWARD (Sponsored by RSC, London) at the International Conference on Nanoscience and Technology (ICONSAT-2014), March 3-5th, 2014, Mohali, India for his poster entitled “Fabrication of graphene/ZnO and graphene/CoPc semiconducting nanowire hybrid structures and their optoelectronic properties”. (2014) Congratulations! 

Best Poster Awards

                    

                     

Opening for JRF and Post-doctoral Positions !
 
  • Hard working and motivated students with NET / GATE qualification are welcome to join our groupb. Please apply online (IITG website) for PhD admission in July and December session every year. Self-motivated candidates with excellent academic record will be preferred. 
 
  • If you have a PhD degree with high impact publications in the relevant area and interested for Institute Post-doctoral fellowship (IPDF), you can write to me for supporting your application for the IPDF/ SERB NPDF schemes. 
 

© Dr. P. K. Giri 2018