Bimal Kumar Sarma

Bimal Kumar Sarma

Assistant Professor

MSc (Gauhati) PhD (IASST)

Nanoscale Physics, Materials Science

Department of Physics
Gauhati University, Guwahati, 781014

Welcome to my home page!

I work in the area of nanophysics. My research interests primarily include

Biomimetic approach to nanocrystals and

Metal-semiconductor heterostructure systems and devices


Important Note for Students: The video lectures, study materials, and assignments on Statistical Mechanics and Nanophysics are being provided online via Google Classroom during this COVID-19 pandemic. 

M. Sc. (Physics)

1. Quantum Mechanics - I (Sem I)

2. Nanophysics (Sem III, IV)

3. Statistical Mechanics (Sem IV)

4. Physics Labs (Sem I, II, III)

5. Projects/Dissertations

pre-PhD course workSelected topics of Experimental Physics and Condensed Matter Physics

M. Sc. (Instrumentation & Applied Physics)Materials Science (Sem II)

 Broad Research Area

  • Transparent conducting thin films
  • Biomimetic nanostructure
  • Plasma nanoscience

Sponsored Projects

  • UGC Start-up Grant for Newly Recruited Faculty - Biomimetic approach to Nanocrystals (2014 -2016)
  • SERB, DST Young Scientist Grant, SB/FTP/PS-36/2014 - Smart Transparent Electrode (2015 - 2018)
  • ASTEC R&D Grant - Colour pure light emission from ZnO based systems (2018 - 2021)

Research Group

  • Dr. Bimal K. Sarma, Assistant Professor
  • Mr. Pradhyut Rajkumar (M.Sc., NET), PhD Scholar and Project Fellow (SB/FTP/PS-36/2014) 2016 batch
  • Mr. Dipak Barman (M.Sc., NET-JRF), PhD Scholar 2017 batch
  • Mr. Jnanraj Borah (M.Sc., NET-JRF), PhD Scholar 2018 batch



  1.  Title: An improved AZO sputtering target for manufacturing transparent conducting film and the method  thereof

             Inventors: Bimal Kumar Sarma, Pradhyut Rajkumar, Bikash Sarma

             Patentee: Bimal Kumar Sarma, Pradhyut Rajkumar, Bikash Sarma

             Patent No.: 339332

             Indian Patent Appl. No.: 201831022820; Date of Filing: 19 June, 2018; Date of Grant: 25 June 2020

For demo video please click here. 

The technology is open for commercialization. Interested company/agency may contact at

Journal Publications

1. Jnanraj Borah, Bimal K. Sarma, Design strategy and interface chemistry of ageing stable AZO films as high quality transparent conducting oxide, J. Colloid Interface Sci. 582 (2021) 1041 (I.F. 7.489). 

2. M. Das, S. Sarmah, D. Barman, B.K. Sarma, D. Sarkar, Distinct band UV-Visible photo sensing property of ZnO-Porous silicon (PS):p-Si hybrid MSM heterostructure, Mater. Sci. Semicond. Process. 118 (2020) 105188 (I.F. 3.085).

3. Dipak Barman, Bimal K. Sarma, Thin and flexible transparent conductors with superior bendability having Al-doped ZnO layers with embedded Ag nanoparticles prepared by magnetron sputtering, Vacuum 177 (2020) 109367 (I.F. 2.906).

4. Bimal K. Sarma and Pradhyut Rajkumar, Al-doped ZnO transparent conducting oxide with appealing electro-optical properties - Realization of indium free transparent conductors from sputtering targets with varying dopant concentrationsMater. Today Commun. 23 (2020) 100870 (I.F. 2.678). 

5. Pradhyut Rajkumar and Bimal K. Sarma, Ag/ZnO heterostructure fabricated on AZO platform for SERS based sensitive detection of biomimetic hydroxyapatite, Appl. Surf. Sci. 509 (2020) 144798 (I.F. 6.182). 

6. Bikash Sarma, Dipak Barman and Bimal K. Sarma, AZO (Al:ZnO) thin films with high figure of merit as stable indium free transparent conducting oxide, Appl. Surf. Sci. 479 (2019) 786 - 795 (I.F. 6.182).

7. Bikash Sarma, Pradhyut Rajkumar and Bimal K. Sarma, Microstructural evolution and optical dispersion of sputtered ZnO thin films at low annealing temperatureMater. Res. Exp. 6 (2019) 016420 (I. F. 1.929).

8.  Bikash Sarma and Bimal K. SarmaRole of residual stress and texture of ZnO nanocrystals on electro-optical properties of ZnO/Ag/ZnO multilayer transparent conductorsJ. Alloys Compd. 734 (2018) 210 – 219 (I. F. 4.650).

9.  Bikash Sarma and Bimal K. SarmaFabrication of Ag/ZnO heterostructure and the role of surface coverage of ZnO microrods by Ag nanoparticles on the photophysical and photocatalytic properties of the metal-semiconductor systemAppl. Surf. Sci. 410 (2017) 557 - 565 (I. F. 6.182).

10.  Bimal K. Sarma, Pintu Barman, Bikash Sarma, Apurba Das, Arup R. Pal, Biomimetic deposition of carbonate apatite and role of carbonate substitution on mechanical properties at nanoscale, Mater. Lett. 185 (2016) 387 - 390 (I. F. 3.204).

11. Bikash Sarma, Sujit Kumar Deb, and Bimal K. SarmaPhotoluminescence and photocatalytic activities of Ag/ZnO metal-semiconductor heterostructureJ. Phys.: Conf. Ser. 765 (2016) 012023.

12. Bimal K. Sarma and Bikash Sarma, Role of magnesium on the biomimetic deposition of calcium phosphateJ. Phys.: Conf. Ser. 765 (2016) 012025.

13. Bimal K. Sarma, Apurba Das, Pintu Barman, Arup R. Pal, Biomimetic growth and substrate dependent mechanical properties of bone like apatite nucleated on Ti and magnetron sputtered TiO2 nanostructure, J. Phys. D: Appl. Phys. 49 (2016) 145304 (I. F. 3.169).

14. Bimal K. Sarma, Arup R. Pal, Heremba Bailung, Joyanti Chutia, Effect of post-deposition annealing on the growth of nanocrystalline TiO2 thin films and elastic anisotropy of rutile phase at different temperatures, J. Alloys Compd. 577 (2013) 261 - 268 (I. F. 4.650).

15. Bimal K. Sarma, Arup R. Pal, Heremba Bailung and Joyanti Chutia, Growth of nanocrystalline TiO2 thin films and crystal anisotropy of anatase phase deposited by direct current reactive magnetron sputtering, Mater. Chem. Phys. 139 (2013) 979 - 987 (I. F. 3.408).

16. Bimal K. Sarma, Arup R. Pal, Heremba Bailung and Joyanti Chutia, A hybrid heterojunction with reverse rectifying characteristics fabricated by magnetron sputtered TiOx and plasma polymerized aniline structure, J. Phys. D: Appl. Phys. 45 (2012) 275401 (I. F. 3.169).

17.  Bimal K. Sarma, Arup R. Pal, Heremba Bailung and Joyanti Chutia, Role of ion energy on growth and optical dispersion of nanocrystalline TiO2 films prepared by magnetron sputtering with ion assistance at the substrate, Appl. Surf. Sci. 258 (2012) 5659 - 5665 (I. F. 6.182).

18.  Bimal K. Sarma, Arup R. Pal, Heremba Bailung and Joyanti Chutia, Microstructural, optical, and dielectric properties of nanocrystalline TiO2 films prepared via ion-assisted magnetron sputtering, Int. J. Mater. Res. 103 (2012) 564 - 570 (I. F. 0.909).

19.  Arup R. Pal, Bimal K. Sarma, Nirab C. Adhikary, Joyanti Chutia and Heremba Bailung, TiO2/polyaniline nanocomposite films prepared by magnetron sputtering combined with plasma polymerization process, Appl. Surf. Sci. 258 (2011) 1199 - 1205 (I. F. 6.182).

20. Bimal K. Sarma, Arup R. Pal, Heremba Bailung and Joyanti Chutia, Extended conjugation in polyaniline like structure prepared by plasma polymerization suitable for optoelectronic applications, Plasma Chem. Plasma Process. 31 (2011) 741 - 754 (I. F. 2.178).