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I’M Prabhat Kumar

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Home: Experience

Research Experience

Senior Research Fellow

(@ Indian Institute of Technology Delhi, New Delhi)

Jan 2013- Present

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MoO3

V2O5 

WO3

Research Trainee

(@ National Physical Laboratory, New Delhi)

Jan 2012 - June 2012

  • Synthesis of CuO nanoparticles using co-precipitation method under different PH conditions.

  • Synthesis and study of Copper Oxide Polymer Nano-Composite for Superior Physicochemical Response of Biodegradable PVA.

  • Thin Film Growth: Studied the growth and surface morphological of transition metal oxide nanostructured thin films (MoO3, V2O5, WO3 and composite of these oxides) by Plasma-Assisted Sublimation Process.

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  • Thin Films: Fabrication of metal oxide thin films by Spin Coating, Dip Coating, Sputtering, Chemical Vapor Deposition etc.

  • Plasma-assisted synthesis of core-shell MOx/MS2 (M=Mo, V, W) nanostructured thin films.

 

 

System Designed and Developed

(@ Indian Institute of Technology Delhi, New Delhi)

  • Plasma-assisted sulfurization set-up: modified thermal evaporation (Edward coating system E306A) for plasma-assisted sulfurization process.

Plasma assisted sulfurization

Plasma assisted sulfurization

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Ar+H2S plasma

Ar + H2S Plasma

Research Skills

  • Knowledge of design and development of thin film deposition systems and characterization setups in the laboratory.

  • Experience of working in class 100 and class 1000 cleanroom.

  • Technical software skills CASA XPS, Origin, MS Office, etc.

  • Hands-on-experience

    • Scanning Electron Microscope (model: ZEISS EVO series model EVO-50)

    • Transmission electron microscope (model: JEOL JEM 1400)

    • FTIR Spectrometer (model: Perkin Elmer, Spectrum BX)

    • UV-Vis-NIR Spectrophotometer (model: Perkin Elmer, Lambda 900) 

    • XPS (model: SPECS, hemispherical analyzer PHOIBOS)

 

 

Ar+O2 plasma

Ar + O2 Plasma

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Publications

 

International Journals

 

2018

 

  1. M. Singh, P. Kumar, and G. B.  Reddy. "Effect of Ar, O2, and N2 Plasma on the Growth and Composition of Vanadium Oxide Nanostructured Thin Films". Advanced materials interfaces, 2018, 1800612.

  2. ‘Spin pumping in the Heusler alloy Co2FeAl/MoS2 heterostructure: Ferromagnetic resonance experiment and theory’,S. Husain, A. Kumar, P. Kumar, V. Barwal, A. Kumar, N. Behera, P. Svedlindh, and S. Chaudhary (accepted in PRB (R)).

  3. “Plasma-assisted synthesis and sulfurization of WO3 into WO3@WS2 core-shell nanorods”, P. Kumar, M. Singh and G. B. Reddy (Submitted).

  4. “A study on intercalation of Mg, Na, and Li ions in composite thin films of MoO3 and V2O5”, M. Singh, P. Kumar and G. B. Reddy (submitted).

  5. “Reaction mechanism for the plasma assisted incorporation of oxygen in MoS2”, P. Kumar, M. Singh, and G. B. Reddy (submitted).

 

2017

 

  1. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. "Oxidation of core-shell MoO2–MoS2 nanoflakes in different O2 ambience", Mater. Res. Express 2017, 4, 036405.

  2. Singh M, Kumar P, Sharma R K and Reddy G B; "Plasma assisted synthesis and growth mechanism of rare V2O5 nanostructured thin films", J. Alloys Compd. 2017, 690 532–41.

 

2016

 

  1. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. "Reaction Mechanism of Core-shell MoO2 /MoS2 Nanoflakes via Plasma-Assisted Sulfurization of MoO3", Mater. Res. Express 2016, 3 (5), 055021.

  2. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. "A Study on Role of Partial Pressure in Controlled Synthesis of Core-Shell MoO2/MoS2 Nanoflakes", Mater. Chem. Phys. 2016, 178, 1–6.

  3. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. "An Experimental Study: Role of Different Ambient on Sulfurization of MoO3 into MoS2", J. Alloys Compd. 2016, 671, 440–445.

 

2015

 

  1. Sharma, R. K.; Singh, M.; Kumar, P.; Reddy, G. B. "Oxidation of Vanadium Metal in Oxygen Plasma and Their Characterizations", AIP Adv. 2015, 5 (9), 097172.

  2. Sharma, R. K.; Kumar, P.; Reddy, G. B. "Synthesis of Vanadium Pentoxide (V2O5) Nanobelts with High Coverage Using Plasma Assisted PVD Approach", J. Alloys Compd. 2015, 638, 289–297.

 

2014

 

  1. Dey, K. K.; Kumar, P.; Yadav, R. R.; Dhar, A.; Srivastava, A. K. "CuO Nanoellipsoids for Superior Physicochemical Response of Biodegradable PVA", RSC Adv. 2014, 4 (20), 10123.

 

AIP Conference Proceedings

 

  1. P. Kumar, M. Singh, P. Gopal, R. K. Sharma, and G. B. Reddy. Influence of substrate on growth of WO3 nanostructured thin films. 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 100022-1–100022-4.

  2. P. Kumar, M. Singh, P. Gopal, and G. B. Reddy. Sulfurization of WO3 nanorods into WS2 as a function of H2S/Ar partial pressure. 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 030252-1–030252-4.

  3. R. K. Sharma, P. Kumar, M. Singh, P. Gopal, and G. B. Reddy.  Effect of oxygen partial pressure on oxidation of Mo-metal. 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 100083-1–100083-5.

  4. M. Singh, P. Kumar, S. K. Saini, and G. B. Reddy. Effect of catalyst on deposition of vanadium oxide in plasma ambient 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 100081-1–100081-4.

  5. S. K. Saini, R. K. Sharma, M. Singh, P. Kumar, and G. B. Reddy. Growth of different V2O5 nanostructures as a function of deposition duration. 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 030076-1–030076-4.

  6. M. Singh, S. K. Saini, P. Kumar, R. K. Sharma, and G. B. Reddy. Plasma assisted facile synthesis of vanadium oxide (V3O7) nanostructured thin films. 2nd International Conference on Condensed Matter and Applied Physics (ICC 2017) AIP Conf. Proc. 1953, 030176-1–030176-5.

  7. Sharma, R. K.; Saini, S. K.; Kumar, P.; Singh, M.; Reddy, G. B. Plasma Assisted Growth of MoO3 Films on Different Substrate Locations Relative to Sublimation Source. Proceeding of International Conference on Condensed Matter and Applied Physics; 2016; Vol. 1728, p 020116.

  8. Singh, M.; Kumar, P.; Sharma, R. K.; Reddy, G. B. A Comparative Study: Effect of Plasma on V2O5 Nanostructured Thin Films. Proceedings of International Conference on Condensed Matter and Applied Physics; 2016; Vol. 1728, p 020177.

  9. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. Effect of Plasma Voltage on Sulfurization of α-MoO3 Nanostructured Thin Films. Proceedings of International Conference on Condensed Matter and Applied Physics; 2016; Vol. 1728, p 020170.

  10. Kumar, P.; Singh, M.; Sharma, R. K.; Reddy, G. B. Sulfurization of α-MoO3 Nanostructured Thin Film. In advanced materials and radiation physics (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics; 2015; Vol. 1675, p 030051.

  11. Sharma, R. K.; Kant, C.; Kumar, P.; Singh, M.; Reddy, G. B. Effect of Nickel Seed Layer on Growth of α-V2O5 Nanostructured Thin Films. In advanced materials and radiation physics (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics; 2015; Vol. 1675, p 030052.

  12. Singh, M.; Sharma, R. K.; Kumar, P.; Reddy, G. B. Plasma-Assisted Synthesis of Vanadium Pentoxide Nanoplates. In advanced materials and radiation physics (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics; 2015; Vol. 1675, p 30040.

  13. Sharma, Rabindar Kumar, Kumar P., and G. B. R. Impression of Plasma Voltage on Growth of α-V2O5. In SOLID STATE PHYSICS: Proceedings of the 59th DAE Solid State Physics Symposium 2014; 2015; pp 030040–030041 – 4.

  14. Sharma, R. K.; Kumar, P.; Reddy, G. B. Growth of MoO3 Nanostructured Thin Films as a Function of O2-Partial Pressure. In SOLID STATE PHYSICS: Proceedings of the 59th DAE Solid State Physics Symposium 2014; 2015; Vol. 1665, p 80006.

 

Conference Presentations

 

  1. “MoS2 and WS2 nanostructured thin films via H2S plasma sulfurization of MoO3 and WO3” Prabhat Kumar*, Megha Singh and G. B. Reddy, International Functional Nanomaterials, and Nanodevice Conference 2017, 24-27 September, Budapest, Hungary.

  2. “Effect of different sulfur environment on sulfurization of MoO3 into MoS2 nanoflakes”, Prabhat Kumar*, Megha Singh, Rabindar K. Sharma, and G.B. Reddy, DPG Spring Meeting, 19-24 March 2017, Dresden, Germany.

  3. “Plasma assisted synthesis of Heterostructured core-multishell nanostructured thin films”, Prabhat Kumar*, Megha Singh, Rabindar K. Sharma, and G.B. Reddy, DPG Spring Meeting, 19-24 March 2017, Dresden, Germany.

  4. “Effect of Sulfur Ambient on Degree of Sulfurization of MoO3 into MoS2 Nanoflakes” Prabhat Kumar*, Megha Singh, Rabindar K. Sharma, and G. B. Reddy, International Conference on Nanoscience, and Technology (ICONSAT 2016), Feb 29 -March 2, IISER Pune, India.

  5. “Impression of electrode separation on the growth of MoO3 Nanostructures as grown using plasma assisted PVD approach”, International symposium on advances in material characterization, July 14, 2014, Lucknow, India.using grown

 

Workshops and Seminars Attended

 

  1. XIX International Workshop on The Physics of Semiconductor Devices, 11-15th December 2017, Indian Institute of Technology Delhi, New Delhi, India.

  2. INUP Hands-on Training workshop on Nanofabrication Technologies- MOS capacitor and micro and nano characterization, 3-11th November 2016, Indian Institute of Science, Bangalore, India.

  3. National symposium on nanoscience and technology, 29-30th June 2016, Indian Institute of Science, Bangalore, India.

  4. Workshop on SEM and EDX, 12- 13 th September 2014, SEM Central Facility, I.I.T Delhi, India.

  5. National Seminar on Condensed Matter, Nuclear and High Energy Physics, 2011, J.M.I. New Delhi, India.

 

 

Publications

Education

What I’ve Learned

My education has not only provided the foundation for the rest of my experiences, but has also made me a lifelong learner who is eager to gain more skills and knowledge. Take a look at my academics below.

Ph. D. 

Jan 2013 - Present

Thin Film Laboratory, 

Indian Institute of Technology Delhi, India

Title of the dissertation is "Synthesis and Characterization of MoO2/MoS2 and WO3/WS2 core-shell Nanostructured Thin Films". 

(Under Guidance of Prof. G. B. Reddy, Department of Physics, Indian Institute of Technology Delhi, New Delhi)

 

MoO2/MoS2 Core-shell heterostructures
Designed and developed a novel method for sulfurization of transition metal oxides into sulfide and referred as Plasma Assisted Sulfurization (PAS). The method is based on H2S/Ar plasma. Optimized various process parameters for synthesis of core-shell MoO2/MoS2 nanostructured thin films (NTFs) at low temperature. Derived a reaction mechanism for sulfurization of MoO3 into MoS2 in reactive plasma environment.

Oxidation of MoO2/MoS2 Core-shell heterostructures
Studied the incorporation of oxygen in MoS2 by oxidation of core-shell MoO2/MoS2 nanostructures in various oxygen ambience. An explanation is derived for the change in the structural, morphological properties of the MoO2/MoS2 core-shell nanostructured thin films.

Oxidation of W-Metal and WO3/WS2 Core-shell heterostructures
Studied oxidation of tungsten metal in O2 plasma environment. Demonstrated that oxide formed on the surface of W-metal can be used as a source, for the deposition of WO3 films. WO3 NTFs were deposited using plasma assisted sublimation process for the first time. A study was carried out to understand the effect of crystal structure of material on its sulfurization by comparing sulfurization of monoclinic WO3 and orthorhombic MoO3. Proposed a reaction mechanism for the synthesis of WO3/WS2 from WO3.

M.Tech. (Nanotechnology)

July 2010 - July 2012

Jamia Milia Islamia (a Central University), New Delhi

CGPA: 8.97/10

Thesis Title: "Synthesis of CuO-PVA nanocomposites for enhancement of thermal and mechanical properties".

 

(Under Guidance of Dr. A. K. Srivastava, National Physical Laboratory, New Delhi, India)

 

Synthesized of CuO nanoparticles using a simple economical co-precipitation method under different pH conditions. Utilized CuO nanoparticles to fabricate PVA nanocomposite materials with augmented thermal and mechanical stability and modified thermal conductivity and optical property.

The thermal stability and the mechanical strength of the polymer membranes indeed showed notable improvements in the composites. Demonstrated that thermal conductivity of the composite membranes increased 50–60% across a temperature range of 0–60°C due to strong host–filler interactions and the presence of H-bonding.

The dielectric constant of the nanocomposite film was about 2 times higher than that of the pure PVA membrane. The high optical transparency of the PVA membrane also was not compromised with the inclusion of nanosized CuO particles.

 

 

B. Tech. (Electronics and Communication)

June 2006 - June 2010

Gautam Buddh Technical University, Lucknow,

U.P., India

B.S.A. College of Engg. and Tech. Mathura, U.P. India

Percentage: 73.38 %

During my B.Tech degree course I have learned about various subjects related to semiconductor materials:

  • Semiconductors materials and devices

  • Solid state devices and circuits

  • Electronics measurements and instrumentation

  • VLSI-Technology and design

A.I.S.S.C.E (senior secondary)

2005 - 2006

Central Board of Secondary Education

New Delhi, India

K. V. Mankhurd, Mumbai, India

Percentage: 76.6 %

Subjects studied:

  • Mathematics

  • Physics

  • Biology

  • English

  • Chemistry

A.I.S.S.C.E (secondary)

2003 - 2004

Central Board of Secondary Education

New Delhi, India

K. V. Mankhurd, Mumbai, India

Percentage/CGPA: 84.2%

Subjects studied:

  • Science 

  • Maths 

  • Hindi

  • English

  • Social science

Online Certificate course

Sep-Dec 2012

Indian Law Institute, New Delhi

"Intellectual property rights and information technology in the internet age"

Grade: A+

Teaching and Mentoring Experience

2013-2014: Worked as a teaching assistant for B.Tech. 1st year         electronics and optics lab, at Indian Institute of Technology Delhi.

2014-2016: Assisted M.Tech. (2) and B.Tech. (3) students in completing their experiments
and dissertation writing.

Education

Summer School and Training 

UK-Israel Workshop Summer School 2018

18-19 June, 2018

Tel-Aviv University, Israel

Indian Oil Corporation Limited

June - July 2009

Instrumentation Department

IOP: Summer school on

NanoScience@Surfaces meeting

1-4 August, 2016

University of Cambridge, UK

Bharat Sanchar Nigam Limited

July- August 2008

Signal Transmission division

Scholastic Achievements

  • Outstanding Reviewer for the International Journal "Journal of alloys and compounds".

  • Best Poster

       (a) "UK-Israel Workshop Summer School 2018 on Nano-Scale Crystallography for Bio and                                        Materials Research"-June 2018, Tel- Aviv University, Israel.

       (b) "International Symposium on advances in materials characterization"- July 2014, Babasaheb                            Bhimrao Ambedkar University, Lucknow, India.

  • International Travel Support

       (a) from Science and Engineering Research Board, Department of Science & Technology (DST), Govt.                of India. 2017
       (b) from Council of Scientific and Industrial Research, Govt. of India. 2017

LET’S CONNECT

Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India 110016

prabhat89k@gmail.com

+91-9555559149

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